Richter Overflow and Pressure Relief Valves
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1 Richter Overflow and Pressure Relief Valves GU, GUT, PRS Lining PFA, optionally PFA-L, PFA-HP Hermetically tight ISO/DIN and ASME -0 to +180 C (-75 to +30 F)
2 GU Overflow valves with high discharge capacity The spring-loaded Richter overflow valve GU is designed to protect against excessive pressure in shut-off pipes and plant components. Fields of application As an overflow valve to safeguard chemical plants against excessive pressure As a pressure relief valve to maintain plant pressures For corrosive media where metallic materials are not resistant enough or special metals cause high costs Predominantly for fluids Range of applications -0 to +180 C (-75 to +30 F) operating temperature, higher temperatures on request Depending on the DN, set pressures up to 13 bar (189 psi), GUT up to 1 bar (3 psi), higher pressures on request Product features Direct acting, spring-loaded Gas-tight in the seat to DIN/EN 1-1, leakage rate A DN 5 (1 ) with certification for liquids, certification No. TÜV-SV 993 /F Inline design with upright seat Almost proportional performance: relatively large mass fluctuations are corrected during opening and closing. Streamlined flow parts: high coefficients discharge a d and high discharge capacity, see page 3. Back pressures p a0 in the valve outlet up to 50 % of the test gauge pressure (for liquids) but: - with test gauge pressures < bar (58 psi), p a0 max = 1 bar (1.5 psi) - with test gauge pressures > bar (58 psi), p a0 max = 3 bar (3.5 psi) For face-to-face and flanges to ISO/DIN and ASME, see page Flanges with groove to DIN 51 on request Identification: TRB 801 No. 5 and DIN EN 19 High-quality external corrosion protection through epoxy coating of the valve; screws made of stainless steel; other materials optional Type Code Overflow valve GU/... Lining PFA.../F Antistatic PFA-L.../F-L Ultrapure (e.g. pharma applications) PFA-HP /F-HP 1 One-piece valve body as well as spring bonnet and lifting cap made of ductile cast iron EN-JS 109 (0.703)/ASTM A395 For special cases cast steel (GS-C5) Metallic support of seat area Thick-walled thermoplastic PFA lining for maximum corrosion resistance Optionally antistatic lining PFA-L Optionally ultrapure PFA-HP Lining thickness 5- mm/ (DN 5 (1 ): 3- mm/ ) Vacuum-tight anchoring of the lining
3 GU 3 Bellows modified PTFE Hermetic sealing to valve bonnet and atmosphere Corrosion protection of the valve spindle Back-pressure-balanced: back pressure has no effect on the set pressure, therefore operation also with variable back pressure Considerably more permeation-resistant than standard PTFE Replaceable valve plug and seat Pressure-resistant PTFE carbon compound Optionally pure PTFE, Hastelloy, etc. 5 Axial needle bearing in the upper spring plate No twisting of the bellows when setting the adjusting screw Lifting cap Gas-tight on request Lifting lever positioned so that it is protected against unintentional activation 7 Precise guidance of the valve spindle and constant travel due to metal-to-metal contact and centering 8 Valve plug can also be lifted without admission pressure: positive-locking connection 9 Fast and easy maintenance of the wetted internals thanks to removable valve bonnet Set pressures and discharge coefficients a d Series GU Set Minimum Liquids: DN pressure flow area a d for h/d 0 mm inch bar (psi) A 0 (mm ) (3.-189) / (.9-189) ( ) / ( ) (1.5-15) on request Extended pressure range on request Adaption to the flow capacity Can be carried out in case of oversizing by a travel stop. Discharge coefficients; see diagram a d by h/d 0 for liquids (DN 5-80; 1-3 ). Valve sizing for liquids q m A 0 = 0.11 a d Dp r p d A 0 = 0 = minimum flow area (mm ) q m = mass flow to be discharged (kg/h) a d = certified discharge coefficient r = density (kg/m 3 ) p 0 = abs. pressure in pressure chamber (bar abs.) p a0 = abs. back pressure in outlet nozzle (bar abs.) Dp = p 0 -p a0 pressure difference (bar) a d by h/d 0 for liquids (DN 5-80; 1-3 ) Pressure/temperature range series GU Gauge pressure (bar) α d 0, 0,3 0, 0, F 0 0,1 0, h/d metal seat DN 5, 0, 50, 5 1, 1 1 /,, 1 / 0 Temperature ( F) DN DN 0, 50, 5, 80 (1 1 /,, 1 /, 3 ) DN 5 (1 ) = mechanical travel stop d 0 = minimum flow area h = stroke F = liquid 0 seat plug PTFE compound 90 Temperature ( C) c b 10 a 150 Pressure spring, galvanized Stem guide, stainless steel Bellows, modified PTFE Guide bush, PTFE-carbon compound Stem, stainless steel Insert sleeve, stainless steel Lifting aid and plug, removeable Operating temperature below -10 C (1 F) to -0 C (-7 F): special material for stem. For low-temperature applications please observe the local regulations! Component group bellows/plug with pressure spring and stem a b c d e f g d e f g 0 Gauge pressure (psig) 3
4 GU, GUT Dimensions and weights ISO/DIN Face-to-face ISO 575 series 1 (DIN 30 F1), flanges ISO Series GU x1 x / x18 x x18 x / x18 x x18 8x on request Series GUT x1 x Dimensions and weights ASME Face-to-face ANSI/ISA , Cl. 150, flanges ASME B1.5 Cl. 150 RF Series GU x1 x 5 / / x1 x 5 / x19 x 3 / x19 8x 3 / Series GUT x1 x 5 / Face-to-face ANSI/ISA , Cl. 300, flanges ASME (ANSI) B1.5 Cl. 300 RF Series GU x19 x 3 / / x.5 x 7 / x19 8x 3 / Series GUT x19 x 3 / H H 1 Components and materials series GU D K Item Designation Material 100 Body Ductile cast iron EN-JS 109/ASTM A395, PFA-lined, optionally PFA-L, PFA-HP 117 Thrust flange 1.00 carbon steel 1 Pressure ring Stainless steel 0 Plug PTFE/carbon compound 05 Seat PTFE/carbon compound 0 Bellows modified PTFE 37 Lifting aid PTFE/carbon compound 38 Lifting lever Ductile cast iron EN-JS 109/ASTM A Stem guide Stainless steel 307/1 Guide bush PTFE/carbon compound 308 Insert sleeve Stainless steel 00/1 O-ring FKM (Viton or equal) 0 Thrust ring, two-piece (R-St. 37) 513 Spring bonnet Ductile cast iron EN-JS 109/ASTM A Stem nut (R-St.5) 535 Lifting cap Ductile cast iron EN-JS 109/ASTM A Upper spring plate Stainless steel 537 Lower spring plate Stainless steel 538 Adjusting screw Stainless steel 80 Spindle 1.10 Stainless steel 90/3 Hex. nut /1 Pressure spring EN SH, galvanized w/o No. Screws and Nuts Stainless steel, other materials on request d nxd DN d 0 L / / / /
5 GUT Overflow valves for very small mass flows Fields of application The action of heat or chemical reactions may cause the medium to expand in shut-off piping systems and other plant components and so the system pressure can reach inadmissible values. In such cases the spring-loaded Richter overflow valve GUT reliably maintains a constant pressure, protecting the plant from damage. In view of the relatively small mass flows, the small, compact GUT, available in DN 5 (1 ), is sufficient here. The GUT is not certified. Range of application -0 to +180 C (-75 to +30 F) operating temperature Set pressures: 1 to 1 bar (1.5 to 3 psi) Product features Can be used for liquids Proportional opening characteristic in accordance with German AD 000 data sheet A Minimum flow diameter d 0 = 1 mm Back pressure in valve outlet pa 0 up to 80 % of the test gauge pressure Face-to-face ISO 575 Series 1 (DIN 30/F1), flanges ISO 7005-/PN 1 Face-to-face and flanges to ASME Cl. 150, see page Inline design with upright seat Flanges with groove to DIN 51 on request Type Code Overflow valve GUT/ Lining PFA.../F Antistatic PFA-L.../F-L Ultrapure (e.g. pharma applications) PFA-HP /F-HP Pressure/temperature range Series GUT Vacuum (mbar) Gauge pressure (bar) H H Temperature ( F) Set pressure p 1 Back pressure p Temperature ( C) Operating temperature below -10 C (1 F) to -0 C (-7 F): special material for stem. For low-temperature applications please observe the local regulations! / / /1 105 Gauge pressure (psig) Vacuum (psia) Components and materials series GUT 800 Item Designation Material 100 Body Ductile cast iron EN-JS 109/ASTM A395, PFA-lined, optionally PFA-L, PFA-HP 105 Cover Ductile cast iron EN-JS 109/ASTM A395 0 Plug PTFE/carbon compound 05 Seat PTFE/carbon compound 0 Bellows modified PTFE 07 Cap PE 307/1 Guide bush PTFE/carbon compound 308 Insert sleeve Stainless steel 509/1 Groove nut Stainless steel 537 Upper spring plate Stainless steel 538 Adjusting screw Stainless steel 800 Valve stem 1.10 Stainless steel 95/1 Pressure spring EN SH, galvanized D K d DN nxd d 0 L Drillings drawn 5 offset
6 PRS Check and overflow valve for low differential pressures Fields of application The overflow valve PRS has been developed to prevent the backflow of vapours, gases and liquids in systems with low differential pressures. For example, a backflow in feed pipes for nitrogen blanketing can be prevented. Range of application 750 mbar (11 psi) set pressure +/- 00 mbar (3 psi) Reseating pressure mbar (5- psi) Product features Compact, inline overflow valve, DN 5 (1 ) Can be used at gauge pressure and vacuum for vapours, gases, liquids certification not required Gas-tight to DIN EN 1-1, leakage rate A, test medium gas Proportional opening characteristic and stable function due to special bearing support of the plug Ductile cast iron shell EN-JS 109 (0.703)/ ASTM A395 Vacuum-resistant lining made of pure PFA, optionally antistatic (other linings on request) Spring-loaded, cup springs made of modified PTFE, maximum corrosion resistance on wetted side Internals can be easily maintained Face-to-face 10 mm to ISO 575 Series 1 (DIN 30/F1), flanges ISO 7005-/PN 1, on request drilled to ASME B 1.5/Cl. 150 Type Code Overflow valve Lining PFA Antistatic PFA-L Richter = TM Richter Chemie-Technik GmbH Hastelloy = TM Haynes Viton = TM Du Pont Presented by: PRS/ /F /F-L Components and materials series PRS Pos. Benennung Werkstoffe 101 Main body Ductile cast iron EN-JS 109/ASTM A395, PFA-lined, optionally PFA-L 10 Body end piece Ductile cast iron EN-JS 109/ASTM A395, PFA-lined, optionally PFA-L 0 Plug PTFE 551 Tapered ring modified PTFE 55 Bearing disc modified PTFE 950/1 Cup spring modified PTFE Details for pressure/temperature range, dimensions etc. on request /1 10 DN 5 (1") Richter Chemie- Technik GmbH Otto- Schott- Str., D-790 Kempen, Germany Tel. +9(0) 1 5/1-0, Fax +9(0) 1 5/ richter-info@idexcorp.com 10 Publication No. 139en Richter Chemie-Technik GmbH. Subject to change without notice. Printed in Germany.
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