EO and EO-2 Bite Type Fittings The Fitting Authority

Transcription

1 EO and EO-2 Bite Type Fittings The Fitting Authority

2 Visual Index G Union W Union Elbow T Union Tee K Union Cross Tube to Tube Fittings Male Stud Fittings Page 25 GE-R/M Male Connector Page 26 GE-R/M-ED Male Connector with EOlastic Seal Page 27 GE-NPT Male Connector Page 28 GEO, GE-UNF/UN Male Connector WE-R/M Male Elbow WE-NPT Male Elbow Pages Bulkhead Fittings Pages SV Bulkhead Union Page 34 WSV Bulkhead Union Elbow Pages ESV Weld Bulkhead Union Pages Page 39 Weld Fittings AS Weld Connector Page 40 WAS Weld Elbow Page 41 Female Connector Fittings Page 42 GAI-R/M Female Connector MAV BSPP Pressure Gauge Connector MAVE BSPP Pressure Gauge Swivel Connector Page 43 Reducers/ Extenders Page 44 RED-L/S Tube End Reducer GR Straight Reducers Pages TR Tee Reducers Page 47 DA Distance Piece Adapter Page 48 Banjo Fittings SWVE-R/M Banjo Elbow Pages SWVE-KDS Banjo Elbow Page 51 W-R/M igh Pressure Banjo Elbow Page W-KDS igh Pressure Banjo Elbow Page T-R/M igh Pressure Banjo Tee T-KDS igh Pressure Banjo Tee Pages Adjustable Fittings w/ Swivel Nut Page 58 EW Swivel Nut Elbow Pages 59 & 61 ET Swivel Nut Branch Tee Pages 60 & 62 EL Swivel Nut Run Tee Pages 63 & 65 Pages 64 & 66 Assembled Adjustable Fittings EW-R/M-ED Swivel Elbow Page 67 ET-R/M-ED Swivel Branch Tee Page 68 EL-R/M-ED Swivel Run Tee Page 69 TEE-M Adjustable Lock Nut Branch Tee TEE-OR Adjustable Lock Nut Branch Tee Page Page Page Page 76 Page 77 For help in identifying EO/EO-2 fittings, see page 24. 2

3 Visual Index TEE-R Adjustable Lock Nut Branch Tee TEE-UNF Adjustable Lock Nut Branch Teel WEE-M Adjustable Lock Nut Elbow WEE-OR Adjustable Lock Nut Elbow WEE-R Adjustable Lock Nut Elbow WEE-UNF Adjustable Lock Nut Elbow Page 78 LEE-M Adjustable Lock Nut Run Tee Page 79 LEE-OR Adjustable Lock Nut Run Tee Page 80 LEE-R Adjustable Lock Nut Run Tee Page 81 LEE-UNF Adjustable Lock Nut Run Tee Page 82 VEE-M Adjustable Lock Nut 45 Elbow Page 83 VEE-OR Adjustable Lock Nut 45 Elbow Page 84 VEE-R Adjustable Lock Nut 45 Elbow Page 85 VEE-UNF Adjustable Lock Nut 45 Elbow Page 86 Swivel Connectors Page 87 EGE-R/M-ED Swivel Connector Page 88 EGE-NPT Swivel Connector Page 89 EGEO Swivel Connector Page 90 GZ Swivel Nut Union Page 95 DVWE-R/M Male Rotary Elbow Page 91 GZR Swivel Nut Union Reducer Page 97 Ball Bearing Rotary Fittings Weld Nipples DG101 Rotary Union Page SKA Weld Nipple Page 98 DG102 Rotary Male Connector Page 94 Plain Bearing Rotary Fittings DG103 Rotary Union Elbow Page 96 DVGE-R/M Male Rotary Connector Page DG104 Rotary Male Elbow Page DG105 Rotary Union Double Elbow Page 101 WFS Code 61 Elbow Page J19 Flange Connections DG106 Rotary Male Double Elbow Page AS3 Code 61 Weld Boss Page J20 BFG ydraulic Flange Connection Page 101 DG107 Rotary Bulkhead Union Page 102 SAE Flange Connections Code 62 igh Press. Series BFW ydraulic Flange Elbow Page DG108 Rotary Union Bulkhead Elbow Page 102 GFS Code 62 Connector Page J21 Non-Return Check Valves Page 101 SAE Flange Connections Code 61 Standard Series WFS Code 62 Elbow Page J21 RD Union Page GFS Code 61 Connector Page J19 AS6 Code 62 Weld Boss Page J22 RV-R/M -ED Male Connector Page J23 Page J24 Page 105 Page For help in identifying EO/EO-2 fittings, see page 24. 3

4 Visual Index RZ-R/M-ED Male Connector RDI Female BSP Union RVP Cartridge Valve I-TL Internal Parts M Nut Tube Fitting Components Page DPR Progressive Ring Page 110 D Cutting Locking Ring Page 111 FM EO-2 Dual Function Nut Page 112 DOZ EO-2 Soft Sealing Ring GM Bulkhead Locknut Page 113 Page 113 Blanking Parts Page 113 VKA Fitting Cap Page 114 ROV Tube End Plug Page 115 Support Sleeves Page 116 E Tube Insert for Plastic Tube V Tube Insert for Metal Tube Seal Rings Page 117 KDS Soft Sealing Rings for Banjo Ftgs W/T Page 118 DKA Sealing Rings for Banjo Ftgs W/T & SWVE DKI Sealing Rings for Pressure Gauge Connectors Page 119 ED EOlastic Soft Seal for BSPP & Metric Threads Page 120 SPRG Spiral Rings OR O-rings Page 121 Shut-Off Valves Page 122 DV PB10 Page 122 LD PB40 Page 123 VDA igh Pressure Page 123 VDB igh Pressure Panel Mount Page 124 WV Union Tee Page 125 Page 126 K DN4-DN25 Page 127 K DN32-DN40 Page 128 K-R/NPT DN4-DN25 Alternating Valves Two-Way Ball Valves KR/NPT DN32-DN40 Page 129 Test Point Connectors GMA1 Union (with Pin-Lock) Page 130 VKA1 Fitting Cap (with Pin-Lock) Page 130 Page 131 GMA3 VKA3 Union (with M16 Fitting Cap (with M16 Threaded Connection) Threaded Connection) Page 131 Page 132 Page 133 Page 134 Page 135 For help in identifying EO/EO-2 fittings, see page 24. 4

5 Technical Data Introduction EO Progressive Ring Fittings The flareless bite type fitting was pioneered by Ermeto in Germany in the early 1930's. When Parker annifin acquired Ermeto, it introduced the EO fittings to the US. Today, the EO fittings are the most widely used bite type fittings in the world. The EO progressive ring fitting is a flareless metric fitting that consists of a body, a progressive ring (ferrule) and a nut. On assembly, two cutting edges of the progressive ring bite into the outer surface of the tube ensuring the necessary holding power for high operating pressures. Fig. 1 EO Fitting Components: Body, Progressive Ring, Nut and Cutaway Available in three series, the EO tube fittings and accessories are manufactured in accordance with DIN The fittings and components listed in this catalog are intended solely for the assembly of connections for fluid applications. Three series of EO tube fittings (LL, L and S) and accessories are manufactured in accordance with DIN 2353 (summary) on the basis of decades of experience.* To ensure functional safety of EO tube fittings, only EO parts should be used in their assembly. Routing of tubes to be carried out in accordance with Parker/EO recommended practices. Assembly instructions are available. Design and Construction The three components of EO fittings are designed and manufactured to produce a strong, reliable, leak-free joint upon proper assembly. The EO Body. EO fitting bodies are available in over thirty configurations. The shaped products (i.e., elbows, tees, crosses) are hot forged, then machined to the stringent EO fitting specifications. The forging process used by Parker further improves the strength and metallurgical properties of the fitting material. Straight products are made from cold drawn bar stock. The cold drawing operation ensures consistently tight dimensional tolerances, as well as significantly improved strength. The EO Progressive Ring (Cutting Ring). EO progressive rings are precision machined with all dimensions and surfaces, particularly the critical bite edges, monitored on an ongoing basis. The rings are then heat treated in a manner that provides the hardness, strength, and toughness necessary to satisfy the demanding service conditions that exist in industry today. The EO Nut. EO fitting nuts are either cold formed, hot formed or machined from cold drawn material. The cold forming and cold drawing operations provide a more tightly packed grain structure, thus improving the material's strength. In addition, cold forming significantly improves the fatigue properties or endurance limits of the nuts. Standard Material Specifications Steel fittings: EO tube fittings - Materials see DIN 3859 Stainless steel fittings: EO tube fittings - X6CrNIMoTi in accordance with DIN 17440, material no Brass fittings: EO tube fittings - CUZN35Ni2 in accordance with DIN 17660/17672, material no Elastomer seals: NBR (BUNA-N), DIN FPM(VITON) Surface Finish - Steel fittings: Standard LL Series Body, Nuts, - Zinc yellow chromate and Rings L+S Series Body and Nuts - Zinc yellow chromate Rings (Progressive) - Zinc olive chromate Short codes for surface protection procedure in accordance with DIN 267 part 9 or DIN *The selection of LL, L or S design should be made by the user on the basis of intended system pressure. The pertinent maximum recommended working pressures are shown throughout this catalog in individual data charts of the various fitting configurations. 5

6 Technical Data Design Conformance Standards EO-standard range is in accordance with DIN 2353 (summary) Tube connection side: DIN 3861 and ISO 8434 Male studs and port tappings for: Metric and BSP thread: DIN 3852, parts 1 and 2 NPT thread: ANSI/ASME B UN/UNF thread: SAE J514/SAE J1926 Metric thread with O-ring seal: ISO 6149 and DIN 3852, part 3 Swivel nuts and weld fittings: DIN 3865 Technical terms for tube fittings as per: DIN 3859 Sealing material FPM (e.g., Viton) If you require fittings with fluorocarbon (FPM) sealing material (NBR, e.g., buna N is standard), insert VIT (for FPM, e.g., Viton) in the standard part number prior to material callout, e.g., GE06ZLREDVITA3C. ow EO Fittings Work: Function of Progressive Ring Fittings Approvals Parker tube fittings are recognized by various acceptance organizations, among which are: Germanischer Lloyd (GL) Lloyd s Register of Shipping (LR) Det Norske Veritas (DNV) American Bureau of Shipping (ABS) Russian Maritime Register of Shipping (RMS) China Classification Society Deutscher Verein des Gas- und Wasserfaches (DVGW) Technischer Überwachungsverein (TÜV) Diverse Military Authorities For other applications, such as mining, power generation or defense, parker tube fittings are also approved by diverse national authorities. Type Approvals usually are limited to certain products, applications, working conditions, validity time or other restrictions. We gladly inform you on your individual application and send out the required documentation. Numerous original equipment manufacturers and end users of various industries have approved Parker tube fittings. Part Numbers All part numbers in this catalog refer to fully assembled steel fittings, for alternatives the following applies. Body only If the basic fitting body only is required, the part number is suffixed by X, e.g., GE20SRA3CX. Less Tube Nuts and Rings only If you require fittings which normally consist of many pieces, i.e., banjos, but without the tube nut and ring, then the suffix OMD is to be added to the standard part number, e.g., W20SROMDA3C. Stainless Steel and Brass Fittings If you require stainless steel or brass fittings, replace suffix A3C with 71 for stainless steel or suffix MS for brass to the standard part number, e.g., GE20SR71 or GE20SRMS. Fig. 2 ow EO Fittings Work The EO progressive ring fitting produces a low to high pressure, leak free connection of tubes and components in fluid systems. The basic function of the EO progressive ring is the controlled progressive bite of the ring into the tube due to a unique internal geometry. The front cutting edge (A) has already started cutting into the tube before the second cutting edge (B) starts. As soon as both cutting edges have cut the tube to the designed depth further advance is limited by the stop edge (C). Owing to the design of both cutting edges and stop edge all forces arising are equally distributed. This distribution along with the specially designed interior collar (D) of the ring guarantees increased safety, particularly with regard to vibration and flexure stresses. The design and function of the progressive cutting ring ensure that service vibration loading is not present in the areas of the tubing where the bite is made. The stop edge causes a sharp increase in tightening forces which is clearly perceptible. After assembly, a visible collar (E) of cut tube material must completely fill the space in front of the first cutting edge. With stainless steel tube and hose connections made from free cutting steel, the collar is less due to the harder material. During assembly, it is absolutely essential that the tube is held firmly against the stop in the inner cone of the fitting; if not, the cutting process will not take place satisfactorily. Reassembly can be performed an unlimited number of times. 6

7 Technical Data Tube Recommendations For steel fittings: Seamless cold drawn steel tubes made from material St or from conditioned base material St in accordance with DIN 1630, state of delivery NBK (normal annealed) with tube outer and inner diameter tolerances in accordance with DIN 2391/ISO Max. hardness: RB 75.EO tubes, see section M. For stainless steel fittings: Material no and Seamless drawn tubes made from austenitic, stainless steel materials no and , in accordance with DIN/EN/ ISO Max. hardness: RB 90. These tubes are particularly recommended for tube fittings, since the tube outer diameter and wall thickness, tolerances correspond to those of steel tubes in accordance with DIN 2391/ISO For brass fittings: Seamless drawn copper tube made from material with short code SF-Cu F37 in accordance with DIN Copper tube is not part of the Parker-Ermeto range. Tube wall thicknesses: In order to determine the necesary tube wall thicknesses for applications, refer to the calculated pressures provided in the tables on pages M4 and M5. The calculated pressures DIN 2413-I are for static and DIN 2413-III for dynamic loads. See page M3 for basis of calculations. Fig. 3A Recommended Tube Wall Thicknesses Steel Use of V necessary 1 Use of V is recommended especially in case of frequent loosening and with heavy-duty tubes (vibrations) Fig. 3B Recommended Tube Wall Thicknesses Stainless Steel Use of V necessary 1 Use of V is recommended especially in case of frequent loosening and with heavy-duty tubes (vibrations) Fig. 3C Recommended Tube Wall Thicknesses Soft Metal Tubing Use of V necessary 1 Use of V is recommended especially in case of frequent loosening and with heavy-duty tubes (vibrations) 7

8 Technical Data Pressure and Temperature Load Capability Pressure Load Capability Definition of pressure specified in the catalog: Working pressure The nominal pressure (PN) as referred to in DIN 2401, part 1 draft. Permissible operating temperature (TB) range for fitting materials: Steel: -40 C to +120 C (-40 F to +250 F) (DIN 3859) Brass: -60 C to +175 C (-75 F to +350 F) Stainless steel: -60 C to +400 C (-75 F to +750 F) (DIN , AD W 10) The specifications in the Pressure reductions section are to be observed here. For sealing materials NBR (e.g. Perbunan): -35 C to 100 C (-30 F to +212 F) FPM (e.g. Viton): -25 C to +200 C (-15 F to +400 F) PTFE: -60 to +200 C (-75 F to +400 F) (Only with banjo fittings W/T) POM (e.g. Delrin): -40 C to +80 C (-40 F to 175 F) (Only with ball valves) Perbunan = registered trademark of Bayer. Viton and Delrin = registered trademarks of Du Pont. The temperature limits specified for sealing materials are approximate values, since the temperature limits can be greatly influenced by the medium. When combining the different fitting and sealing materials, the lowest temperature limit in each case is applicable. Example: GE10LR71 made from stainless steel sealed with cutting face. Temperature range: -60 C to +400 C (-75 F to +750 F) GE10LRED71 made from stainless steel with ED ring. Seal made from FPM. Temperature range: Fitting material -60 C to +400 C ED seal (-75 F to +750 F) -25 C to +200 C (-15 F to +400 F) Permissible temperature range of fitting: -25 C to +200 C (-15 F to +400 F) Pressure Reductions Recommended pressure reductions (determined by the fluid medium) for higher service temperatures. Fitting Temperature range Pressure Material C F Reductions Steel -40 to C -40 to 250 F Brass -60 to C -75 to +350 F 30% Stainless Steel -60 to + 20 C -75 to +70 F Stainless Steel + 50 C +120 F 4% Stainless Steel +100 C +212 F 11% Stainless Steel +200 C +400 F 20% Stainless Steel +300 C +570 F 29% Stainless Steel +400 C +750 F 33% Table 1 Pressure Reductions Intermediate values are to be interpolated. If the tube material used deviates from the fitting material, the tube is to be checked separately with regard to the permissible temperature range and the possible pressure reductions required. Male stud fittings may require additional pressure reductions, due to the mating port material, and the sealing mechanism must also be taken into account. For male stud fittings with cutting face, additional sealants may be required. Any request for deviation from the pressure reduction factors shown should be made to the Engineering Department of Parker annifin. The catalog working pressures represent the max. permissible operating pressure for which the temperature limits and pressure reductions listed in the above tables have been taken into account. Operational design factor at static load is 4:1. The pressure and safety specifications are based on all assemblies being in accordance to Parker-Ermeto instructions. It is further assumed that the tube routing will be laid and clamped in such a fashion that no additional stress, load or tension may act on the fittings. Tube fixtures are to be laid with sufficient stability according to the operating conditions and connected with supports. EO tube clamps are recommended for simple, problem-free assembly. Assembly Information The proper make up and assembly of EO bite type fitting is critical to their proper functioning. Following are the various methods of EO fitting make up as well as port end assembly information for EO bite-type fittings. 8

9 Technical Data Assembly in fitting body (for steel and copper tubes) The use of pre-assembly bodies VOMO or pre-assembly tools are strongly recommended for all assemblies (see pages 11 and 12). Stainless steel tube and fittings as well as standpipe hose ends must be pre-assembled in a VOMO body or pre-assembly tool. A) Preparing the tube 1 Maximum height for straight tube end The portion of straight tube must not deviate from roundness and straightness to the extent that the tube tolerances in DIN 2391 are exceeded. Minimum length L for short piece of tube Series LL L S Tube o.d min L min Attention: Do not use tube cutters! a) tube cut with tube cutter: heavy burr/bevel cut Saw off tube square 1/2 angle tolerance to the tube axis. Cutting the tube square is made easy with our tube cutting guide (AV). b) sawed off tube: very little burr 5 B) Preparing fittings parts with lubricants 6 Lightly de-burr inside and outside edge. Bevel up to 0.3mm x 45 (0.012" x 45 ) permissible. Is support sleeve necessary? (See Page 13) Lubricate thread and cone of fitting body, also EO-progressive ring and thread of nut. 9

10 Technical Data Assembly in fitting body C) Components 7 8 (for steel and copper tubes) correct D) Assembly 9 incorrect Slip nut and progressive ring over tube end. Ensure progressive ring and nut are facing the right way. Screw nut manually on to fitting body until fingertight. old tube against the shoulder in the cone of fitting body E) Check 12* To measure the prescribed turns of the nut, mark nut and tube. Tighten nut 1-1/2 turns (Tube must not turn with nut). Stop edge limits over tightening by increasing tightening torque. Loosen nut. Remove tube from fitting and check if a visible collar fills space in front of 1st cutting edge completely. If not, tighten slightly more. It does not matter if ring can be rotated on tube end. F) Final assembly 13 G) Repeated assembly 14 Final assembly of all pre-assembled fittings (EW, ET, EL, EGE, RED) made in the appropriate body (well lubricated) with at least 1/4 turn of the nut beyond the point of a clearly perceptible resistance. On remaking joints, nut to be tightened without increased effort. Fitting body to be held tight. * After dismantling the tube ends for inspection they should be refitted into the same inner cone of the fitting body in which assembly was carried out. Warning: We warn against using sealing heads, form A, DIN We recommend the use of swivel nuts, form B in conformance with DIN (DKO connections). 10

11 Technical Data Assembly in hardened pre-assembly body (VOMO) with subsequent final assembly For frequent assembly of stainless steel tube as well as hose standpipe fittings, pre-assembly must take place exclusively in the pre-assembly bodies VOMO or with pre-assembly tools/machines (see section N). A) Inspection of pre-assembly bodies (VOMO) 1 2 The cones of the pre-assembly bodies VOMO are subject to normal wear and must be checked regularly (after every 50th pre-assembly) with cone gauges for trueness. Worn preassembly bodies must be replaced to avoid poor quality assemblies. Use of cone gauges: The rear of the gauge must protrude slightly above the top of the 24 cone or may be flush with the top face. If these conditions are not satisfied, the pre-assembly body is no longer dimensionally correct. Bodies must be checked visually for longitudinal scoring or other damage which would not be shown by the gauge. B) Preparing the tube Attention: Do not use tube cutter! a) tube cut with tube cutter: heavy burr/bevel cut Saw off tube square 1/2 angle tolerance to the tube axis. Cutting the tube square is made easy with EO cutting tool (AV). b) sawed off tube: very little burr 6 C) Treatment with lubricants 7 Lightly de-burr inside and outside edge. Bevel up to 0.2 x 45 (0.010" x 45 ) permissible. Is a support sleeve necessary? (See Page 13) Clamp the pre-assembly body according to tube size and series in the vice, coat all parts (VOMO thread and taper, progressive ring, thread of the nut ) with lubricant. For stainless materials we recommend EO NIROMONT FLUID OR PASTE OR STP (see section N). 11

12 Technical Data Assembly in hardened pre-assembly body (VOMO) with subsequent final assembly D) Components 8 9 correct E) Pre-assembly 10 Slip nut and progressive ring over tube end. F) Check pre-assembly 11 G) Final assembly 12 incorrect Ensure progressive ring and nut are facing the right way. Screw on nut manually until fingertight, hold tube against stop in internal cone of pre-assembly body. To measure the prescribed turns of the nut, mark nut and tube. Turn nut approx. 1-1/4 turn progressive ring will have cut into the tube (tube must not turn). ) Final assembly of pre-installed fittings 13 After the pre-assembly, check whether there is a visible collar in front of the cutting edge. Check the fit of the pre-assembled tube of the tube stop of a fitting body. Use a partially split fitting for this. The top face of the pre-assembled tube must touch the tube stop of the fitting body. I) Check of final assembly 14 Loosen the nut, remove tube and check whether a clearly visible collar fills space in front of the first cutting edge. The collar for stainless tubes is less than for steel tubes due to the material hardness. It does not matter if the progressive ring can be rotated on the tube end. Put pre-installed tube into fitting body, tighten by approx. 1/4 turns of nut beyond point of clearly perceptible resistance. J) Repeated assembly 15 On remaking joints, nut to be tightened without increased effort, body to be held tight. Final assembly of all pre-assembled fittings (EW, ET, EL, EGE, RED) is made in the appropriate body (well lubricated) with at least 1/4 turn of the nut beyond the point of a clearly perceptible resistance. The assembly of stainless steel tube is made easier by unscrewing the nut a few times and treating the thread with lubricant. (This applies for paste and spray-on lubricants). For liquid lubricants, loosening of the nut is sufficient so that lubricant can get between the contact surfaces. It is recommended that test assemblies should be made before hand with tubes of a greater rigidity or special materials. If in doubt, please send us an approx. 30 cm long tube end for test assembly. 12

13 Technical Data Assembling with support sleeves (V) The thickness of the tube wall is often governed by the requirements of the internal pressure without taking the tube fittings and any external influences into account. If the tube wall thickness is low relative to the external diameters of the tube, this may lead to greater tube limitations (as a rule, the tube constriction should not exceed 0.3 mm for tubes up to O.D. 16 and 0.4 mm for tubes from O.D. 18 upwards). When assembling thin walled tubing there is insufficient cross sectional rigidity where the progressive ring cuts. This will have a detrimental effect on the sealing efficiency. For this, support sleeves are available which are inserted in the tube to prevent constriction and increase the cross-sectional rigidity, respectively. The shape of the tube supports allows them to be inserted easily in the tube. One end of the EO support sleeve is enlarged on its external diameter by a knurl. On insertion, this knurl forces itself into the interior wall of the tube and secures the sleeve against shifting or falling out during assembly and without widening the tube end. Steel tubes made of St 35.4 or 37.4 or soft metal tubes can be checked in accordance with Figs. 4A and 4B, respectively, to see if they require support sleeves; for plastic tubes, (support) sleeves are always necessary (see Page 119 for E sleeves). For stainless steel tubes of material /1.4541, refer to Fig. 3B to determine the need for a support tube. Fig. 4A Recommended Tube Wall Thicknesses Steel Use of V necessary 1 Use of V is recommended especially in case of frequent loosening and with heavy-duty tubes (vibrations) Fig. 4B Recommended Tube Wall Thicknesses Soft Metal Tubing Use of V necessary 1 Use of V is recommended especially in case of frequent loosening and with heavy-duty tubes (vibrations) For range of support sleeves (V) chapter I support sleeve EO fitting completely assembled with support sleeve. V Fig. 5 EO Fitting Completely Assembled with Support Sleeve 13

14 Technical Data Assembly of support sleeves Attention: do not use tube cutter! a) tube cut with tube cutter: heavy burr/bevel cut Saw off tube square 1/2 angle tolerance to the tube axis. Cutting the tube square is made easy with EO cutting tool (AV). b) sawed off: very little burr Lightly de-burr inside and outside edge. (Attention: Do not chamfer) Insert support sleeve up to knurl. Drive knurl edge into tube. 7 8 Ensure support sleeve is flush with tube end*. No necking of tube visible after assembly with support sleeve. *Further assembly, see pages 8 to

15 Technical Data Connectors, Unions and Elbows This section covers assembly information pertaining to the following fittings: G, W, T, K, GE, GE-ED, GE-NPT, GEO, GE-UN/UNF, WE, WE-NPT, SV, WSV, ESV, AS, GAI, MAV, MAVE, RED, KOR, RI, RI-ED, GR, TR. Tube Unions and Tube Reducers: G, W, T, K, SV, WSV, ESV, RED, KOR, GR, TR Assemble tube ends and swivel ends in accordance with the Tube End Assembly Information on pages 8 through 13. Connectors and Elbows (DIN 3852): GE, GE-ED, GAI, MAV, MAVE, RI, RI-ED Male stud ends used on the above fittings use seal form B (DIN 3852) and EOlastic seals. They should be assembled to the specified torque values identified in tables A43 and A44. The values listed are for steel fittings with either zinc yellow chromate or zinc phosphate plating. For RI and RI-ED fittings, use S series values. Connectors and Elbows (ISO 6194, SAE J1926, NPT and BSPT: GE, GE-NPT, WE-NPT: Refer to assembly instructions on pages A42 and A43 for NPT threads. GE-UN/UNF: Refer to assembly instructions on pages A41 and A42 for non-adjustable SAE O-ring port assembly. GEO: For ISO 6149, use SAE assembly instructions on page A45. Torque values per Table A42. WE: For BSPT assembly, use NPT assembly instructions on pages A42 and A43. Banjos and Swivels This section covers assembly information pertaining to the following fittings: SWVE, W, T, EW, EW-R/M, ET, ET-R/M EL, EL-R/M EGE. Banjo Assembly: SWVE, W, T The recommended assembly torques for the banjo bolts for each fitting style is located in the part tables. Assemble tube ends in accordance with the Tube End Assembly Information on pages 8 through 13. Swivel Assembly: EW, ET, EL, EGE Assemble swivel ends in accordance with the Tube End Assembly Information section on pages 8 through 13. Male Stud Assembly: EW-R/M, ET-R/M, EL-R/M, EGE Assembly of the male stud end should be in accordance with the information above in section Connectors and Elbows (DIN 3852). Weld Nipples EO weld nipple fittings with an O-ring seal between weld nipple and body give impressive tear out resistance and sealing integrity, and a sensible supplement to the progressive ring. Fittings bodies and nuts are fully interchangeable for weld nipple and progressive ring fittings of the same series and tube outside diameter. Weld nipples SKA conform to DIN 3865 form A. Weld suitability and weldability: Weld nipples, SKA, SKAR, ASK and AS are made of steel suitable for welding and should be welded in accordance with usual techniques. Weld nipples of stainless are suitable for arc welding. The use of EO steel and EO stainless steel tube is recommended (see section M). Weld Nipple Assembly: 1) Cut off the tube square, deburr, bevel to a 45 chamfer. 2) Slide nut onto the weld nipple. 3) Weld nipple to the tube according to normal welding procedure. The tube and nipple must be aligned. 4) Clean the weld on the inside and outside. 5) Fit the O-ring: caution, do not twist the O-ring. Taper nut and cone must be clean. 6) Oil nut, taper, cone and thread before assembly. 7) Screw on nut until hand tight. Fully tighten 1/4 to 1/2 additional turns. Make sure that the tube and weld nipple is assembled straight and without stress to the body. Flanges SAE Flange Connections: The SAE flange connections are available in two series (standard and high pressure). The difference between these series are the flange pattern sizes due to working pressure and the mating tube size. The port side connection of the SAE flange is made using two flange halves which hold the flange body in place via socket headed cap screws. The flange is sealed with an O-ring located in a groove in the flange body face. The tube is connected by the EO progressive ring or weld nipple. Surface Finish: Flange halves Socket head cap screws Zinc plated with yellow chromate DIN phosphated and oiled Flange Assembly: Assemble tube ends in accordance with the Tube End Assembly Information on pages 8 through 13. See Table 2 for torque information for socket head cap screws. 15

16 Technical Data Tightening Socket head torques Series Size cap screws Nm* 1/2 M8 25 Standard 3/4 Series 1 M10 49 Code /4 1 1/2 M M /2 M8 25 igh 3/4 M10 49 Pressure 1 M12 85 Series 1 1/4 M Code /2 M M Table 2 Tightening Torques for Socket ead Cap Screws *Based on friction number µtotal = 0.14 EO ydraulic Flange Connections: These fittings are distringuished by their smaller external dimensions than the SAE flange. The port-side flange connection is designed to fit the flange pattern of leading European pump manufacturers. Sealing is by O-ring, by socket head cap screws. Surface Finish: EO ydraulic Flange fitting Socket head cap screws Spring washer GTW 40 zinc plated with yellow chromate DIN phosphated and oiled DIN 127 zinc plated with yellow chromate Flange Assembly: Assemble tube ends in accordance with the Tube End Assembly Information on pages 8 through 13. See Table 3 for torque information for socket head cap screws for BFG and BFW flange fittings. Socket screw Tightening centers Socket head torques (LK) cap screws Nm* LK35 M6 10 LK40 M6 10 LK55 M8 25 Table 3 Tightening Torques for Flange Assemblies *Based on friction number µtotal = 0.14 Ball Bearing Rotary Fittings DG Ball Baring Rotary Fittings: These compact, maintenance-free construction, serviced proved fittings combine ball and plain bearings with constant lubrication and relative wear resistant annular piston seals. They are rated for working pressures up to 250 bar, have a low starting torque and have a suitable pressure/rpm rate. Ball bearing rotary fittings are designed for connecting a fixed point to a rotating, swinging or moving machine part via tubing or hoses. Thus axial torsion of tubing or hoses can be prevented. They are suitable for hydrualic oils and lubricants of mineral oil base, not suitable for water or gasses. Nominal temperature range is -35 C to +80 C. Permissible number of revolutions (rpm) Tube Nominal under a working pressure** of: Torque at O.D. bore (mm) 25 bar 64 bar 100 bar 160 bar 250 bar 250 bar/kpm Table 4 Number of Revoluations and Starting Torques **A minimum working pressure of 10 bar is necessary! Fitting Instructions: The life of rotary fitting depends considerably in a stress-free line connection. Therefore, the direct connection with tube is to be avoided. For connection to hoses the use of swivel nut fittings is recommended with short, straight lines (approx. length 5x hose O.D.). Thus shucks and vibrations can be absorbed. Assemble tube ends in accordance with the Tube End Assembly Information on pages 8 through 13. Assemble BSPP and metric stud ends in accordance with torque values in Tables A43 and A44. Plain Bearing Rotary Fittings Plain Bearing Rotary Fittings: These compact, maintenancefree construction, serviced proved fittings are rated for low pressure bearing tube and hose with slow rotating, swinging or moving machine parts up to 64 bar (L series) and 160 bar (S series). Plain bearing rotary fittings are designed for connecting a fixed point to a rotating, swinging or moving machine part via tubing or hoses. Thus axial torsion of tubing or hoses can be prevented. They are suitable for hydraulic oils and lubricants of mineral oil base, not suitable for water or gasses. Nominal temperature range is -35 C to +100 C. Series L Tube O.D Permiss. no. rpm Series S Tube O.D Permiss. no. rpm Table 5 Number of Revolutions Fitting Instructions: The life of a rotary fitting depends considerably in a stress-free line connection. Therefore, the direct connection with tube is to be avoided. For connection to hoses the use of swivel nut fittings is recommended with short, straight lines (approx. length 5x hose O.D.). Thus shocks and vibrations can be absorbed. 16

17 Technical Data Assemble tube ends in accordance with the Tube End Assembly Information on pages 8 through 13. Assemble BSPP and metric stud ends in accordance with torque values in Tables A43 and A44. Non-Return Valves Characteristics: Sealing is achieved by using a 90 cone with a packing washer of synthetic material. Valve has a lift stop which provides safe free outlet, shock-absorbing, muffled opening and no reduction of cross section. Maximum flow velocity not more than 8 m/sec (for higher flow velocities special tests are required). Sealing of male stud thread by EOlastic soft seal with types RV and RZ. Opening Pressure: Approximately 1 bar (on request also and 3 bar are available. Please specify on order). Tolerance of opening pressure is ±20%. Material: Steel zinc-plated (A3C), seals of NBR (Nitrile, e.g., buna N). On request of FPM (Fluorocarbon, e.g., Viton). Features, Advantages & Benefits 1. Visible Bite The critical ferrule to tube front bite is clearly visible to tube fitters & inspectors. The presence of the recommended bite virtually eliminates any risk of catastrophic blow-off. This is a very important safety feature. 2. Sealing Capability EO fittings have demonstrated a remarkable ability to remain leak free under various service conditions ranging from sealing high vacuum and small molecules gases to high pressure hydraulic fluids. 3. Disturbed Stresses Stresses due to service flexural loading are distributed at several points in the joint, thus stress concentration in the bite is minimized. 4. Vibration Control The rear bevel of the ferrule firmly grips tubing, thus dampening the effects of system vibration in the joint. 5. Progressive Ring Design The progressive ring design provides a second bite for improved reliability and higher working pressure capability. This design also decreases the risk of improper assembly because of the sharp, high torque rise which occurs when the fitting is properly tightened. 6. Envelope Size EO fittings are comparatively small and compact, making it a suitable selection for plumbing in limited or tight space. 7. Temperature Rating EO fittings are suitable for subzero through elevated temperature applications. Service temperature rating is limited by the material chosen. 8. Compatibility Since EO fittings can be manufactured from a wide range of metals, its compatibility factor with various fluids and atmospheric conditions is virtually limitless. One simply has to select and specify Ferulok fittings from an acceptable material that best satisfies the service conditions. 9. Tube Wall EO fittings are suitable for use with light wall, medium wall, heavy wall, and extra heavy wall tubing. (Light wall tube may require support sleeve (V), as shown on Page 12.) 10. Re-Usability / Remakeability Joints can be disassembled and reassembled many times to facilitate system maintenance. This reduces the labor and material costs that would otherwise result from tube and fittings replacement. 11. Assembly No expensive, complicated tooling is necessary to assemble EO fittings. Assembly is simple when the procedures described on pages 8 through 13 are followed. 12. Materials EO fittings can be manufactured from almost any metallic material. The more popular materials currently used for EO fittings are: stainless steel, carbon steels, brass, and monel. On request the Tube Fitting Division will machine EO fittings from other appropriate material specified by users. 13. Manufacture EO fittings are manufactured under tight quality control which ensures that the product routinely satisfies or surpasses the requirements of the pertinent military and industrial standards. 14. World Wide Popularity The bite type fitting design has worldwide acceptance and is especially popular in Europe. 15. Finish Steel EO fittings have a zinc gold chromate finish. This finish provides good corrosion protection. 16. Silver Plated Nuts Stainless steel tube nuts are prelubricated with silver plated threads (size 15L-42L, 12S-38S). Thread galling is eliminated and assembly torque is reduced as much as 40 percent. This increases the speed and efficiency for stainless steel fitting assembly. 17. Availability EO fittings are available as standard in over thirty different configurations, and as many as twentyseven different size combinations in some configurations. 18. Configurations Popular configurations for EO fittings are shown in the Visual Index on pages 2 through 4. Other configurations can be manufactured on request. 17

18 Technical Data EO Trouble Shooting Guide Problems with bite type hydraulic fittings are most often traced to faulty pre-set/assembly procedure. Problem Solution Tube not bottomed Shallow bite Over-set ferrule Ferrule cocked on tube No bite Check for a visible mark on the tube end with EO fitting. (Fig. 6) Inspect for turned up ridge of material (collar). A failure to achieve this ridge can be traced either to the nut not being tightened enough or the tube not being bottomed against the stop which allowed the tube to travel forward with the ferrule. In some instances this assembly may be re-worked. (Fig. 7) Too much pressure or more than recommended turns from finger tight were used to pre-set ferrule, or the nut was severely over-tightened in final assembly. This assembly should be scrapped. (Fig. 8) The ferrule may become cocked on the tube when the tube end is not properly lined up with the body. Generally, this condition is caused by faulty tube bending. All bent tube assemblies should drop into the fitting body prior to make up. This assembly should be scrapped. (Fig. 9) If all of the prior checks have been made and the ferrule still shows no sign of biting the tube, it may be that the tube is too hard. This assembly should be scrapped. (Fig. 10) Table 7 EO Fitting Trouble Shooting ints Fig. 6 Tube not bottomed Fig. 8 Over-set ferrule Fig. 10 No bite Fig. 7 Shallow bite Fig. 9 Ferrule cocked on tube 18

19 Technical Data Introduction EO-2 Fitting System The heart of the EO-2 fitting is the new EO-2 functional nut with which previously metal-to-metal sealed tube connections can now be soft sealed. Naturally, all fittings in the EO-2 series are fully compatible with our Ermeto Original range of products and can be combined with them. For more demanding applications, in particular for new designs, we recommend the use of EO-2 fittings. Swivel Nut The System EO-2 Functional Nut 24 cone ISO The Functional Nut The functional nut consists of the nut plus the sealing and retaining rings. The sealing and retaining rings are combined in a pair and are inserted into the internal thread of the nut in such a manner that they cannot fall out, so that these three parts from one functional element. This functional nut simplifies handling of the fitting and helps to minimize storage and procurement costs. The Sealing Ring The sealing ring consists of a steel support ring with a bonded sealing lip of NBR (stainless steel support rings are bonded wth FPM). The elastomeric sealing element locates inside the fitting cone and blocks the only possible leak path. The high compression of the sealing lip guarantees excellent sealing even under high dynamic strain. The design geometry of the sealing lip additionally uses system pressure to increase the sealing effect still further. The Retaining Ring The retaining ring bites into the tube wall in accordance with the proven bite ring principle. The design and heat treatment of the ring guarantee a high degree of reliability for the mechanical joint even under constant mechanical strain. Standard Material Specifications Please see page 5. O-ring seal ISO 6149 EOlastic seal ISO 1179 Design Conformance Standards For fitting bodies and nuts, see page 6. Patents Fig. 11 The EO-2 Fitting System Design and Construction of the EO-2 Fitting EO-2, the latest development from Parker-Ermeto, is a fitting system with a soft seal on the tube side and a 24 cone according to ISO /DIN The most important features of the system are: functional nut separation of sealing and retaining functions elastomeric soft seal consistently safe assembly results EO-2 sealing and retaining ring combination is patented with the German Patent Office (Patent No ). International patents are pending. Approvals EO-2 holds Lloyd's Register of Shipping approval number 93/ Other approvals are being prepared. 19

20 Technical Data Part Numbering All fittings in the EO-2 series are normally supplied complete with EO-2 functional nuts (FM) on the tube connection side and seals on the port connection side. To order complete fittings with EO-2 functional nuts, use the letter Z in the part number. Example of order: GE12ZSREDA3C GE12SREDA3C EO-2 complete fitting corresponding progressive ring fitting from The EO product series ow EO-2 Fittings Work The assembly of the EO-2 fitting is very simple. It can be assembled directly into fitting bodies. When the necessary tightening point has been reached, the gap between the sealing and retaining rings closes; the surface contact of both rings makes it impossible to overtighten the union. The noticeable rise in torque at the end of assmebly guards against undertightening. All assembly aids such as pre-assembly bodies and the automatic ydra-tool can, of course, be used during assembly of the EO-2 fittings. Pre-assembly gives a finished assembled joint. When finally installing the tube to the fitting body, the joint only has to be retightened. A large number of repeat assemblies are possible; the sealing ring can be replaced if necessary (see Page 23 for assembly instructions). The Advantages Soft sealing on tube side ensures optimum leak-tightness and improved operational reliability. Insensitive to vibration and pressure spikes. Simple and reliable assembly control, repeated assembly no problem. Cost-saving dry assembly, no lubrication of individual parts and preassembly equals a finished assembly. No complicated preparation of tubes. Replacement of sealing ring no problem. Ease of handling. Functional nut with integrated sealing and retaining elements. Tube Recommendations Please refer to page 7 for tube recommendations for steel, stainless steel and soft metal tubing. In order to determine the necessary tube wall thicknesses for applications, refer to the calculated pressures provided in the tables on pages M4 and M5. The calculated pressures DIN 2413-I are for static and DIN 2413-III for dynamic loads. See page M3 for basis of calculations. Pressure and Temperature Load Capability Please see page 8. Media Compatibility Permissible working media for NBR seal materials (e.g. buna N): mineral oils FA, FB, FC fluids diesel fuel and heating oil water up to 100 C compressed air up to 80 C environmentally friendly hydraulic fluids ETG (basis: rape oil) EE (basis: ester) EPG (basis: polyglycol) This information is based on test results, manufacturers' recommendations and experience. In the case of critical applications, prior consultation with the responsible agency or with our applications engineering department is necessary. NOTE: FC hydraulic fluids can remove the zinc plated surface! The Applications EO-2 enhances the proven Parker-Ermeto EO fittings in all sizes of the light and heavy series. The system is suitable for wide spread use in hydraulic systems. EO-2 fittings and accessories conform to DIN 2353/DIN3859. The operational reliability of EO-2 fittings depends on the exclusive use of EO parts and their assembly as well as designing the tubing layout according to instructions (see assembly instructions). We reserve the right to carry out alterations in the interest of technical improvements. 20

21 Technical Data Assembly Instruction EO-2 Tube Preparation 1 2 Caution: Do not use tube cutters; they produce an undesirable bevel cut and push material to the I.D., reducing the flow passage. a) tube cut with tube cutter: heavy burr/bevel cut Cut tube squarely. A 1 angle deviation is permissible. Recommendation: EO tube cutting tool and a hacksaw with double-sided blades. b) sawed off: very little burr 3 4 Cutting the tube square is made easy with EO cutting tool (AV). Deburr inside and outside diameter of the tube. Chamfer up to 0.3mm x 45 is permissible. Recommendation: InEx Tube Deburring Tool Part Number 226. Caution: Burrs on the tube O.D. can damage the EO-2 seal. 21

22 Technical Data Direct Assembly in the EO-2 Fitting (for steel tubes in accordance with DIN 2391-C-St 37.4 NBK) Fitting Preparation: Lubricate the fitting body threads of the following sizes: Steel Fittings: 20, 22, 25, 28 *Lubrication is recommended for ease in assembly Stainless Steel Fitting: For all sizes, lubrication is recommended for ease in asssembly igh quality Niromont (liquid or paste). Note: Other lubricants may not provide desired performance. It is strongly recommended that a hydraulic tool be used to preset EO-2 fittings in sizes 30S, 35L, 38S and 42L. Assembly: Insert tube into the EO-2 fittings body and press hard against the stop in the inner cone. NOTE: A faulty assembly will result if the tube is not against the tube stop in the fitting body. To achieve the necessary assembling force, an additional wrench leverage may be necessary for tube O.D.'s 20mm and larger. Turn nut until wrench resistance is felt. Tighten nut further 1 to 1-1/2 turns. As a recommended process control, mark the position of the nut relative to the fitting body. 4 5 Inspection: Loosen the nut and check that the gap between the sealing ring and ferrule is fully closed. A slight gap (up to 0.2mm) due to spring back is acceptable. Re-assembly: Connect tube and nut to fitting body. olding the body rigid, tighten nut with a wrench until resistance is felt. Continue turning the nut approximately 1/6 to 1/4 turns (= 1 to 1.5 flats) to the same position as it was prior to disassembly. If the assembled position was marked, reassemble until the marks match. To achieve the necessary assembling force, use an additional wrench leverage for tube O.D.'s 20mm and larger. Caution: Improper tightening may reduce the pressure capability and the vibration resistance of the connection. ydraulic Presetting Methods yferset: ydra-tool: EOMAT IIIA: Recommended for use with EO-2 fittings from 6mm through to 28mm Recommended for use with EO-2 fittings from 6mm through to 42mm Recommended for use with EO-2 fittings from 6mm through to 42mm 22

23 Technical Data Assembly in ardened Pre-Assembly Body (VOMO) (for steel tubes in accordance with DIN 2391-C-St 37.4 NBK) Manually assemble functional nut onto the VOMO until finger-tight. For easier assembly, lubricate the threads of the VOMO on sizes 20mm O.D. and up. Insert the prepared tube with FM nut into VOMO. Press tube hard against the tube stop inside the VOMO. Caution: A faulty assembly will result if the tube does not contact the tube stop inside the VOMO. Turn nut until wrench resistance is felt. Tighten nut further 1 to 1-1/2 turns. To achieve the necessary assembly force, use of additional leverage for tube O.D.'s 20mm and larger, may be necessary. 4 Inspection: Loosen nut and check that the gap between the sealing ring and ferrule is almost or fully closed. A slight gap (up to 0.2mm) due to spring back is acceptable. The gap will be uniform around the tube if not preset correctly. Note: Fitting body may be used for one-time installation instead of VOMO. 5 Re-Assembly: Connect tube and nut to fitting body. olding the body rigid, tighten nut with a wrench until resistance is felt. Continue turning the nut approximately 1/6 to 1/4 turns (= 1 to 1.5 flats) to the same position as it was prior to disassembly. If the assembled position was marked, reassemble until the marks match. To achieve the necessary assembling force, use an additional wrench leverage for tube O.D.'s 20mm and larger. Caution: Improper tightening may reduce the pressure capability and the vibration resistance of the connection. Re-Assembly with Replacement of Sealing Ring (DOZ) After the nut has been loosened, the sealing ring can be pulled off the tube end. It must be checked for damage and replaced if necessary. Push new sealing ring onto the tube, with metal inner cone facing the retaining ring. Re-Assembly: Connect tube and nut to fitting body. olding the body rigid, tighten nut with a wrench until resistance is felt. Continue turning the nut approximately 1/6 to 1/4 turns (= 1 to 1.5 flats) to the same position as it was prior to disassembly. If the assembled position was marked, reassemble until the marks match. To achieve the necessary assembling force, use an additional wrench leverage for tube O.D.'s 20mm and larger. Caution: Improper tightening may reduce the pressure capability and the vibration resistance of the connection. 23