Pressure relief, holding pressure valve

Products > Water system valve > Pressure relief, holding pressure valve

Pressure relief, holding pressure valve

Model: 500X
Nominal diameter: DN50 ~ 1000mm
Nominal pressure: PN1.0 ~ 2.5MPa
Suitable medium: water, oil, water, sewage
Temperature: 0 ~ 80 ℃
Flange Standard: GB / T17241.6, GB / T9113
Test standards: GB / T13927, API598
shared:

First, 500X relief valve structure and use of features:

500X pressure relief / pressure holding valve consists of a main valve, pressure relief / pressure pilot valve needle, ball valve, microfilter and pressure gauge to form a hydraulic control takeover system. The use of hydraulic automatic operation, that can be used for pressure relief valve and pressure valve can be used. For pressure relief valve used to maintain the water supply pressure below the set safety value; do hold pressure valve to maintain the water pressure upstream of the main valve above the set value to maintain water pressure upstream of the main valve. 

500X pressure relief valve using hydraulic self-control, do not need other devices and energy, easy maintenance, a valve and more. 
This series of valve products are widely used in high-rise buildings, living areas and other water supply pipe network systems and urban water supply projects.


Second, 500X pressure relief valve works:

1, as a pressure relief valve: When the pressure relief / pressure relief pilot valve is adjusted state, water needle valve, the main valve control chamber, valve A, relief / holding pressure pilot valve, ball B toward the outlet, at this time Main valve is open. When the inlet pressure exceeds the safety value set by the pressure relief / pressure holding pilot valve, the pressure relief pilot valve will open automatically and release part of the water through the valve C to relieve the pressure in the pipeline. The pressure relief valve closes automatically when the pressure returns to its safe value. For pressure relief valve, the ball valve normally open. 

2, as holding pressure valve: When the pressure relief valve / pilot pressure regulator to adjust the state, as long as the main valve inlet pressure below the pilot valve set, pilot valve is closed. 
The main control room pressure, the main valve is closed. When the main valve supply pressure upstream of the pilot valve exceeds a set pressure, holding pressure to open the pilot valve, the control chamber outlet to discharge water through the ball valve, the control chamber buck main valve, water supply starts, i.e., the upstream pressure maintained. For holding pressure valve, ball valve C is normally closed or replaced with silk plug.


Third, 500X pressure relief valve main technical parameters:

Nominal pressure (Mpa)

Shell test pressure (MPa)

Seal test pressure (MPa)

Suitable media

Medium temperature (℃)

1.0

1.5

1.1

water

0-80

1.6

2.4

1.76

2.5

3.75

2.75


Fourth, 500X 
pressure relief valve main parts and materials:

Part Name

Parts and materials

Body valve cover

WCB

Valve seat disc

Copper alloy

O-ring seals

Nitrile rubber

Valve stem

2Cr13

spring

50CrVA

Needle valve

Copper alloy

Ball valve

Copper alloy

Pressure relief / holding pressure pilot valve

Copper alloy

Micro filter

stainless steel

 

Fifth, 500X relief valve installation dimensions:

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Fifth, 500X pressure relief valve connection size (PN 1.0-2.5MPa):

Nominal diameter DN

L

H

H1

A

B

50

250

335

90

170

170

65

280

345

98

180

180

80

310

355

110

190

190

100

350

365

120

200

200

125

400

445

145

215

215

150

450

460

155

230

230

200

550

505

190

255

255

250

650

550

250

295

295

300

800

710

290

325

325

350

900

725

330

380

380

400

1000

760

360

415

415

450

1000

810

445

435

435

500

1100

865

495

460

460

600

1100

935

550

520

520

700

1450

1000

605

570

570

800

1560

1100

730

620

620

900

1800

1205

800

670

670

1000

2000

1330

910

830

830


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