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Pressure Relief & Sustaining Control Valves

Features

The Pressure Relief & Sustaining Control Valve maintains the inlet pressure at minimal reselected value. To hold a steady line pressure the valve is opening fast and closed gradually to prevent surge. If installed on a by-pass line, main line pressure is accurately controlled by relief of excess pressure.
500X Pressure Relief & Sustaining Control Valve is used in the pipeline system to prevent of surpassing pressure or to keep the pressure of it, to reduce the water hammers shock after the pump is closed and also used as a water hammer remover in the large water supply system. A self cleaning filter screen is placed on the inlet of the valves control system, which stops the suspension grains of the bigger specific gravity and diameter from going into the system by means of the bigger specific gravity of the fluid to ensure the main valves water supply pressure at the upstream at the set value, and to get the system circulated smoothly without any resistance. This valve features by sensitive open-close, safety, reliability, stable motion and long duration.

Pressure Relief & Sustaining Control Valves
Pressure Relief & Sustaining Control Valves

1. Small Ball Valve
2. Pilot Valve
3. Small Ball Valve
4. Small Ball Valve
5. Needle Valve

Technical Parameters

Nominal Pressure: 1.0, 1.6, 2.5MPa
Shell test pressure: 1.5, 2.4, 3.75MPa
Sealed test pressure : 1.1, 1.76, 2.75MPa
Suitable temperature: 80
Suitable medium: water, Sewage

Materials

Serial No. Part Material
1 Body Cast Iron (GG25, HT200) / Ductile Iron (GG40, QT)
2 Pin Bronze
3 Seat 2Cr13 / SS 304 / SS 316
4 O-ring Gasket NBR
5 O-ring NBR
6 O-ring washer Cast Iron
7 O-RING NBR
8 Stem 2Cr13 / SS 304 / SS 316
9 Disc Cast Iron (GG25, HT200) / Ductile Iron (GG40, QT)
10 Diaphragm Rubber
11 Diaphragm washer Bronze
12 Ball valve Bronze
13 Nut H62
14 Spring 50CrVA
15 Cover Cast Iron (GG25, HT200) / Ductile Iron (GG40, QT)
16 Pilot Socket H62
17 Nut 35
18 Stud 35
19 Ball valve Bronze
20 Pressure relief valve Bronze
21 Ball Valve Bronze
22 Pressure show  
23 Needle valve Bronze
24 Micro-strainer 304
25 Connection socket Cast Iron

Dimensions

DNmm 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500
L 180 180 180 203 203 235 285 360 400 455 585 650 800 860 915 980 1075
PN10 D 105 115 135 145 160 180 195 215 245 280 335 390 440 500 565 615 670
D1 75 85 100 110 125 145 160 180 210 240 295 350 400 460 515 565 620
PN16 D 105 115 135 145 160 180 195 215 245 280 335 405 460 520 580 640 705
D1 75 85 100 110 125 145 160 180 210 240 295 355 410 470 525 585 650
PN25 D 105 110 135 145 160 180 195 230 270 300 360 425 485 550 610 660 730
D1 75 85 100 110 125 145 160 190 220 250 310 370 430 490 550 600 660
H 550 550 550 610 610 625 645 750 808 864 1135 1185 1325 1385 1445 1325 1430
H1 460 460 460 516 516 520 538 596 655 710 805 855 955 990 1030 905 960

Typical Installation

Typical Installation of Rate-of-Flow Control Valves
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