Pressure Relief Valves for Pipe Mounting

Transcription

1 Vickers ressure Relief ressure Relief Valves for ipe Mounting EC-6/1, 1 Series; EC5-6/1, 3 Series ypical Section EC5-1 example asic Characteristics Max. pressure bar (3625 psi) Max. flow rates: EC(5) L/min (757 US gpm) EC(5) L/min (144 US gpm) General Description hese adjustable pressure relief valves limit system pressure by directing pump flow to reservoir when the system pressure reaches the setting of the valve, thus preventing overloading the system. heir two-stage design ensures fast response and minimal pressure override. In addition to the conventional relief valve operation, a pilot venting feature allows the system pressure to be dropped to near-zero, or to a low-level pressure. he valve is available in two versions: type EC5, with integral solenoid operated pilot valve, and in basic form, type EC. In the EC5 version, the pilot valve provides for selection of up to three pressures or one/two pressures plus off-loading according to the model type. he circuitry options can be further extended by the use of remote control valves. In both the EC and EC5 versions the port can be connected to an on/off valve for load/unload, or to a pressure pilot valve for remote control of the pressure setting. For both models the integral manual pressure adjustment is available as screw/locknut, or micrometer with keylock. May 1996 G-233

2 Functional Symbols EC valves Notes: 1. ll valves: port fitted with removable plug. 2. EC5 models: and ports fitted with removable plugs. 3. EC5 models: Each valve carries two nameplates: he mainstage valve carries the lower half of the functional symbol and shows the full valve model code. he solenoid pilot valve carries the upper part of the functional symbol and shows the model code of the individual pilot valve. EC5-***(V)- Solenoid de-energized = ed Solenoid energized = On-load, by integral control EC5-***(V)-L Solenoid de-energized = ed Solenoid energized = On-load, by integral control EC5-***(V)-C oth solenoids de-energized = ed Right-hand solenoid energized = On-load, externally controlled at Left-hand solenoid energized = On-load, externally controlled at Y X Y X EC5-***(V)-2 Solenoid de-energized = On-load, externally controlled at (or integral control if plugged) Solenoid energized = On-load, externally controlled at (or integral control if plugged) EC5-***(V)-2L Solenoid de-energized = On-load, externally controlled at (or integral control if plugged) Solenoid energized = On-load, externally controlled at (or integral control if plugged) EC5-***(V)-2C oth solenoids de-energized = On-load, by integral control Right-hand solenoid energized = On-load, externally controlled at Left-hand solenoid energized = On-load, externally controlled at Y X X Y For solenoid identities, Sol. / Sol., see nine pages on. 2

3 Model Codes Features in brackets ( ) may be omitted if not required. ll other features must be specified. asic Models (Without Integral Solenoid ilot Valve) (F3-) EC- ** * (V)(-K)-1* Models With Integral Solenoid ilot Valve (F3-)EC5- ** * (V)(-K)- *** (-*)-(V) M- *** (L) - * 5-3* Fluid compatibility lank = nti-wear hydraulic oil (class L-HM), invert emulsion (class L-HF) or water glycol (class L-HFC) F3 = s above or phosphate ester (class L-HFD) 2 Nominal bore size 6 = 3 / 4 1 = 1 1 / 4 3 C F ressure adjustment range = 5 to 7 bar (75 to 1 psi) = 35 to 14 bar (5 to 2 psi) = 1 to 25 bar (145 to 3625 psi) 4 High vent spring Omit for low vent spring 5 ressure adjustment method K = Micrometer with keylock Omit for screw/locknut method 6 Integral pilot valve spool/ spring arrangement L C See Functional Symbols 2 2L 2C 7 Manual override options Override option in solenoid end(s) only lank = lain manual override H = Water-resistant override on DC solenoids only Z = No override 8 V Solenoid identity method = Solenoid at port end of pilot valve; solenoid at end of pilot valve (German practice). Omit for solenoid identity to US NSI 93.9 standard, i.e. energize solenoid for to ; solenoid for to. 9 Solenoid connection type U = ISO 44 (DIN 4365) on coil FW = 1 / 2 N thread conduit box FW= 1 / 2 N thread conduit box and terminal strip FJ = M2 thread conduit box FJ = M2 thread conduit box and terminal strip Other connection types as shown in catalog 215 (DG4V-3/3S) may be made available depending on quantities. Female connector to be supplied by user. 1 Indicator lights Option for solenoid connection types F()W and F()J L = Lights fitted Omit if lights not required.for U type coil use plug with integral light, see nine pages on. 11 Coil rating = 11V C = 11V C 5 Hz/12V C 6 Hz C = 22V C 5 Hz D = 22V C 5 Hz/24V C 6 Hz G = 12V DC H = 24V DC For 6 Hz or dual frequency. 12 Design number 1 series for EC models 3 series for EC5 models Subject to change. Installation dimensions unaltered for design numbers 1-19 and 3-39 respectively. 3

4 Operating Data ypical with petroleum oil at 21 cst (12 SUS) and at 5 C (122 F). Maximum pressures: orts,, and ort : EC, 1 series EC5, 3 series Normally this is connected directly to the reservoir. ack pressure at port is additive to the valve setting: if the back pressure exceeds system pressure by approx. 7 bar (1 psi), reverse flow to may occur. 25 bar (3625 psi) ressure adjustment ranges See Model Code 3 25 bar (3625 psi) 1 bar (145 psi) EC5, 3 series valves are designed to satisfy the needs of most applications. Consult your Vickers representative about an alternative model if: a) Valves are required to remain pressurized for long periods without frequent switching, and/or b) ack pressure at port is required to rise above 1 bar (145 psi). Maximum flow rates: EC(5)-6 EC(5)-1 ressure override pressures flow Response times, EC5 models ank port leakage with valve closed.valve set at max. pressure; pressure at port = 5% of max. pressure. EC(5)-** EC(5)-**C EC(5)-**F hermal stability 2 L/min (757 US gpm) 38 L/min (144 US gpm) See next page See next page See next page See two pages on <2 cm 3 /min (12.2 in 3 /min) <3 cm 3 /min (18.3 in 3 /min) <5 cm 3 /min (3.5 in 3 /min) See two pages on Electrical Data for EC5 Models Coil voltages See Model Code 11 ermissible voltage fluctuation: Maximum Minimum See emperature Limits, three pages on 9% of rated voltage, see Model Code 11 Relative duty factor Continuous, ED = 1% ypes of protection: ISO 44 coils with plug fitted correctly Conduit box Coil winding Lead wires (coils type F**) Coil encapsulation IEC144, class I65 IEC144, class I65 Class H Class H Class F ower consumption for coils listed in Model Code 11 : Initial Holding V V (rms) (rms) C coils: ypes, C at 5 Hz ypes, D at 5 Hz ypes, D at 6 Hz DC coils: G 3W H 3W 1st half cycle; solenoid armature fully retracted 4

5 erformance Characteristics ypical with petroleum oil at 21 cst (12 SUS) and at 5 C (122 F) unless stated otherwise. ressure Override at various settings EC(5)-6 models EC(5)-1 models psi bar psi bar ressure ressure L/min L/min US gpm Flow rate US gpm Flow rate ressure Levels EC(5)-6 models EC(5)-1 models ressure psi bar High vent spring V Low vent spring L/min ressure psi bar 8 6 High vent spring V Low vent spring 3 4 L/min US gpm Flow rate Flow rate 8 1 US gpm Flow/Main Flow Valid for EC(5)-6 and -1 models ed pilot flow rate US gpm L/min High vent spring V Low vent spring Valve main flow rate L/min US gpm 5

6 hermal Stability t various pressure settings and with flows: EC(5)-6 at 15 L/min (4 US gpm) EC(5)-1 at 3 L/min (8 US gpm) ressure psi bar emperature C F Under remote control conditions, vent line flow through pilot relief valve set at various pressures; main valves at maximum flow rates EC(5)-*** low vent pressure models EC(5)-***V high vent pressure models Flow rate US gpm L/min bar (psi) 25 (36) 27 (3) 138 (2) 69 (1) Flow rate US gpm L/min bar (psi) 25 (36) 27 (3) 138 (2) 69 (1) C C emperature F emperature F Response imes, EC5 Models pproximate times for selecting remote and integral pressure settings from when a signal is first applied at the solenoid of an EC5-***(V)-2** model. EC5-***(V)-** models (see Functional Symbols ) are slower when closing from the vented condition, EC5-***V (high vent spring) models being faster than those without the V feature. C solenoids: Energizing ms De-energizing ms DC solenoids: Energizing ms De-energizing ms In pure switched circuit conditions devoid of the effects of any suppression diodes and full-wave rectifiers. 6

7 Control Methods 1. Manual adjustment of pressure setting For details see Installation Dimensions section. 2. connection his connection allows a control valve to be placed in parallel with the pilot pressure stage of the valve. suitable on/off valve can then be used to drop the system pressure to near-zero (or to the high vent pressure level), see diagram. valve 3. Remote control lternatively a pilot relief valve can be connected in place of or after the on/off valve, to provide remote control of the EC(5) pressure setting. Suitable pilot relief valves are Vickers models C-175 and CGR-2, described in catalogs 411 and 49 respectively. For EC5 models, control circuitry options can be extended by additional valves connected to ports and. Hydraulic Fluids ll valves can be used with: ntiwear hydraulic oils (class L-HM) Invert emulsions (class L-HF) Water glycol (class L-HFC) hosphate ester (class L-HFD), adding F3- prefix at model code 1. he extreme viscosity range is from 5 to 13 cst (227 to 7 SUS) but the recommended range is 54 to 13 cst (245 to 7 SUS). For further information about fluids see leaflet 92. emperature Limits Minimum ambient C (4 F) Maximum ambient: For EC valves C (158 F) For EC5 valves with coils listed in model code 11 and at 11% of rated voltage: Coil type and frequency Max. ambient temperature Dual frequency coils ypes and D at 5 Hz ypes and D at 6 Hz Single frequency (5 Hz) coils ypes and C at 5 Hz DC coils ypes G and H Fluid emperatures (all Models) Min. Max.* etroleum oil 2 C (4 F) +7 C (158 F) Watercontaining +1 C (5 F) +54 C (13 F) * o obtain optimum service life from both fluid and hydraulic system, 65 C (15 F) normally is the maximum temperature except for water-containing fluids. For synthetic fluids consult fluid manufacturer or Vickers representative where limits are outside those of petroleum oil. Whatever the actual temperature range, ensure that viscosities stay within the limits specified in the Hydraulic Fluids section. Contamination Control Requirements Recommendations on contamination control methods and the selection of products to control fluid condition are included in Vickers publication 9132 or 561, Vickers Guide to Systemic Contamination Control. he book also includes information on the Vickers concept of roctive Maintenance. he following recommendations are based on ISO cleanliness levels at 2 m, 5 m and 15 m. For products in this catalog the recommended levels are: 65 C (15 F) 65 C (15 F) 65 C (15 F) 7 C (158 F) Up to 21 bar (3 psi) /17/14 bove 21 bar (3 psi) /17/14 7

8 Installation Dimensions in mm (inches) EC Models 3rd angle projection 4 optional positions for adjustment control may be obtained by rotating cover to required position. connection, G 3 / 8 ( 3 / 8 SF). Leave plugged except when application requires a pilot control line to be connected. 18, (.7) to remove key 25, (.98) K fully out Ø35, (1.38 dia) 17,5 (.69) /F locknut. orque to Nm (36-43 lbf ft) Ø57,2 (2.25 dia) Cover fixing screws, 4 off: EC-6: M8 socket head cap screw orque to Nm (24-26 lbf ft) EC-1: M1 socket head cap screw orque to 62-7 Nm (46-51 lbf ft) ressure adjustment control (no symbol at Model Code 5 ). Slacken locknut before turning handwheel clockwise to increase pressure setting; counter-clockwise to decrease setting. Retighten locknut. Keylock Feature K at Model Code 5 o adjust pressure setting, insert key and turn clockwise. urn micrometer knob clockwise to increase pressure setting; counter-clockwise to decrease setting. When key is removed the knob can spin freely without affecting the pressure setting. ressure inlet or outlet connection: EC-6: G 3 / 4 ( 3 / 4 SF) EC-1: G1 1 / 4 (1 1 / 4 SF) F ilot or pressure gage connection: EC-6: G 1 / 8 ( 1 / 8 SF) Socket head plug orque to 8-1 Nm ( lbf ft) EC-1: G 1 / 4 ( 1 / 4 SF) Socket head plug orque to 2-23 Nm ( lbf ft) G, 2 places C, 3 places H J D Discharge to tank connection: EC-6: G 3 / 4 ( 3 / 4 SF) EC-1: G1 1 / 4 (1 1 / 4 SF) E Model C D E F G H J K EC-6*(V)-(K)-1 EC-1*(V)-(K)-1 77,7 (3.6) 95,3 (3.76) 57,2 (2.25) 76,2 (3.) 42, (1.65) 56, (2.2) 63,5 (2.5) 76,2 (3.) 16,4 (4.19) 124, (4.88) 146, (5.75) 155,5 (6.12) 13, (4.6) 112,5 (4.43) 133,3 (5.25) 163,6 (6.44) 63,5 (2.5) 76,2 (3.) 179 (7.5) 189 (7.44) 8

9 EC5 Models EC5-***(V)-*C-(V)M-U-*5-3* Models Other EC5 models on next two pages For dimensions not shown see EC models on previous page Ilot valve nameplate includes pilot valve symbol, solenoid identification and model code for individual pilot valve. 4 optional positions for adjustment control may be obtained by rotating cover to required position. Solenoid locations remain relative to pilot manual adjuster position. connection, G 3 / 8 ( 3 / 8 SF). Leave plugged except when application requires a pilot control line to be connected. 4 off M5 bolts. orque to 5-9 Nm (45-8 lbf in) 48, (1.89) 15,2 (4.14) 17,5 (.69) /F locknut orque to Nm (36-43 lbf ft) Cover fixing screws, 4 off: EC5-6: M8 socket head cap screw orque to Nm (24-26 lbf ft) EC5-1: M1 socket head cap screw orque to 62-7 Nm (46-51 lbf ft) Ø57,2 (2.25 dia) ressure adjustment control. Slacken locknut before turning handwheel clockwise to increase pressure setting; counter-clockwise to decrease setting. Retighten locknut. 13, (.51) for plug removal With C solenoids: 2, (7.87) With DC solenoids: 22, (8.66) EC5-6: 14,5 (.57) EC5-1:,5 (.2) For coil removal: C solenoid: 45, (1.77) DC solenoid: 61, (2.4) For manual override type H : 15, (.59) Ref. X Ref. Y EC5-6: 248 (9.76) EC5-1: 28 (11.) port, G 1 / 8 ( 1 / 8 SF) ressure inlet or outlet connection: EC5-6: G 3 / 4 ( 3 / 4 SF) EC5-1: G1 1 / 4 (1 1 / 4 SF) Mainstage valve nameplate: includes mainstage valve symbol and full valve model code. port, G 1 / 8 ( 1 / 8 SF) ilot or pressure gage connection: EC5-6: G 1 / 8 ( 1 / 8 SF) socket head plug orque to 8-1 Nm (7-88 lbf in) EC5-1: G 1 / 4 ( 1 / 4 SF) socket head plug orque to 2-23 Nm (15-17 lbf ft) ressure inlet or outlet connection: EC5-6: G 3 / 4 ( 3 / 4 SF) EC5-1: G1 1 / 4 (1 1 / 4 SF) Discharge to tank connection: EC5-6: G 3 / 4 ( 3 / 4 SF) EC5-1: G1 1 / 4 (1 1 / 4 SF) May vary according to plug source. See Solenoid Identities, two pages on. lug not supplied; order separately if required. For available plug types see section Electrical lugs and Connectors. 9

10 EC5-***(V)(-K)-*/(L)(-*)-(V)M-U-*5-3* Models EC5-***(V)-*/(-*)-(V)M-U-*5-3* example For dimensions not shown see EC5 models on previous page and EC models two pages back. With C solenoid: 146, (5.75) With DC solenoid: 156, (6.14) For coil removal: C solenoid: 45, (1.77) DC solenoid: 61, (2.4) 46, (1.81) For manual override type H : 15, (.59) EC5-6: 14,5 (.57) EC5-1:,5 (.2) Ref. Y port port EC5-***(V)(-K)-*/(L)(-*)-(V)M-FJ(L)-*5-3* Models EC5-***(V)(-K)-*/(L)(-*)-(V)M-FW(L)-*5-3* Models EC5-***(V)-*/(-*)-(V)M-FJ/W-*5-3* example For dimensions not shown see EC5 models on previous page and EC models two pages back. Conduit entry both ends, see Model Code 9, seven pages back. Closure plug fitted to one end. With C solenoid: 146,5 (5.77) With DC solenoid: 156,5 (6.16) 47, (1.85) Ground (earth) connection Ø,4 (.16 dia) self-tapping screw Overall height: EC5-6: 252 (9.92) EC5-1: 284 (11.18) port Ref. Y port For EC5-***(V)(-K)-*L/L models the pilot valve solenoid and body end plug are interchanged from as shown. he solenoid reference then becomes Ref. X. See Solenoid Identities next page. Ref. Model Code 9 : Codes FJ and FW : 2 lead wires for each solenoid, approx 15 (6.) long. M3 terminals provided for customer connection. Codes FJ and FW : lead wires connected into terminal strip suitable for M3 terminals on customer connection. 1

11 EC5-***(V)(-K)-*C(-*)-(V)M-FJ(L)-*5-3* Models EC5-***(V)(-K)-*C(-*)-(V)M-FW(L)-*5-3* Models EC5-***(V)-*C(-*)-(V)M-FJ/W-*5-3* example For dimensions not shown see EC and EC5 models three and two pages back respectively. port With C solenoids: 2 (7.87) With DC solenoids: 22 (8.66) Ref. X Ground (earth) connection Ø,4 (.16 dia) self-tapping screw Ref. Y port See Solenoid Identities this page. Ref. Model Code 9 : Codes FJ and FW : 2 lead wires for each solenoid approx 15 (6.) long. M3 terminals provided for customer connection. Codes FJ and FW : lead wires connected into terminal strip suitable for M3 terminals on customer connection. Solenoid Identities he solenoid identity ( Sol. /Sol. ) is printed on the nameplate of the pilot valve of EC5 models. For NSI/NF standard, no symbol at model code 8 : Spool/spring code at model code 6 L C 2 2L 2C For German practice, V at model code 8 : Spool/spring code at model code 6 L C 2 2L 2C Solenoid identity Ref. X Ref. Y Solenoid identity Ref. X Ref. Y EC5-***(V)-K-**(L)(-*)-(V)M-***(L)-*5-3*Models EC5-***(V)-K-**(L)(-*)-(V)M-U-*5-3* example For dimensions not shown see EC and EC5 models three and two pages back respectively. EC5-6: 179, (7.5) EC5-1: 189, (7.44) 25, (.98) o adjust pressure setting, insert key and turn clockwise. urn micrometer knob clockwise to increase pressure setting; counterclockwise to decrease setting. When key is removed the knob can spin freely without affecting the pressure setting. 18, (.7) to remove key Ø35, (1.38 dia) 11

12 Electrical lugs and Connectors lugs for ISO 44 (DIN 4365) ype Coil Connection For valves with type U coils (model Order plugs separately by part number. code 9 ). Voltage art number he cable entry on these plugs can be repositioned at 9 intervals by re-assembly of the contact holder relative Gray (Sol. ) Without indicator light lack (Sol. ) to the plug housing. he cable entry is g11 for cable Ø 6-1 mm (.24 to dia). With indicator light 12-24V 1-125V 2-24V erminal Strip and Lights For FJ or FW at model code 9 For FJL or FWL at model code erminal strip (part number 89345) clips to cover and can be field-fitted Conduit box cover and nameplate complete with sealing gasket and 4 screws Lights M3 x,5-6h screws (part number 1866) 2 each end 4 terminal screws M3 x,5-6h (part number ) Connections to solenoid (or, according to model type) 28,5 (1.12) 3, (1.18) Connections to solenoid (or, according to model type) Rubber gasket nti-rotation tab ensures correct orientation of cover to junction box 2 lenses in cover 1.For DC coils the +ve lead(s) must be connected to the terminal(s) marked +. When using 3-wire incoming leads to double solenoid valves (i.e. common neutral) the inner pair of terminals must be linked. 2. For correct light indication of energized solenoid ensure that solenoid leads are correctly connected: light terminals are common with each outer pair of solenoid terminals according to the side with + mark. 12

13 Installation Data Mounting attitude: unrestricted. Mass (approx.), kg (lb) EC ,5 (9.9) EC ,1 (2.) EC5 models C sol. DC sol. EC5-6 with single solenoid EC5-6 with double solenoid EC5-1 with single solenoid EC5-1 with double solenoid Ordering rocedure Specify valves by full model code; plugs by part number. 6,5 (14.3) 6,9 (15.2) 9,6 (21.1) 1, (22.) 6,7 (14.7) 7,4 (16.3) 9,8 (21.6) 1,5 (23.1) 13