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Medium: Water/Oil /Gas
Temp: -41-220°C
Design Standards: CJ/T 219 JB/T 10674 ,EN1074-5 BS EN1567
TEST STANDARD: GB/T 13927, ISO5208,EN12266-1
PRESSURE: PN10/16/25 ,ANSI CL125/150/300;JIS 10K/16K,AS TABLE D,TABLE E
CONNECTION: FF,GB12221/EN 558-1/IS 5752 SERIS 1
FLANGE DRILING: EN1092-2,ISO7005-2,ANSI/JIS/AS2129
The Model 500 Pressure Sustaining/Relief Valve is a hydraulically operated, pilot-controlled, modulating valve designed to maintain constant upstream pressure within close limits. This valve can be used for pressure relief, pressure sustaining, back pressure, or unloading functions in a by-pass system. In operation, the valve is actuated by line pressure through a pilot control system, opening fast to maintain steady line pressure but closing gradually to prevent surges. Operation is completely automatic and pressure settings may be easily changed by adjusting screw on top of the pilot.
1 Main valve 2Needle valve 3Pressure relief4 Pilot 5Ball valve 6Strainer 7 Pressure Gauge
A:Inlet isolation valve B: Strainer C: Pressure relief valve D:Outlet isolation valve
DN 50 65 80 100 125 150 200 250 300 350 400 450 500 600 L 230 290 310 350 350 480 600 730 850 850 1100 1100 1250 1450 H 139 159 179 214 214 333 407 476 526 526 624 624 720 835 H1* 85 95 102 112 127 145 172 205 232 262 292 325 360 425 K 173 198 226 265 265 351 436 524 606 606 741 741 1002 1308 S 3/8" 3/8" 3/8" 1/2" 1/2" 1/2" 3/4" 1" 1" 1" 1 1/2" 1 1/2" 2" 2"
Weight (Kg) 14 19 23 32 45 68 125 200 260 310 560 620 880 1300
Component Standard Material Combinations
Body & Cover Ductile: Iron Cast ,Stainless steel , Bronze
Available Sizes: DN50-600, DN50-150, DN50-150
Disc Retainer &Diaphragm Washer: Ductile Iron, Stainless steel, Bronze
Trim: Disc Guide,Seat: Stainless steel, Bronze
Seal :NBR, EPDM, HNBR
Diaphragm: Nylon Reinforced NBR Rubber, Nylon Reinforced EPDM Rubber, Nylon Reinforced HNBR Rubber
Stem, Nut & Spring : Stainless steel
For material options not listed, consult US PLS.
Pressure Sustaining and Reducing Valve PN 25/16/10