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Water Supplier and Fire Fighting Pressure Sustaining Valve

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Basic Info

Model No.:  SL500X

Product Description

Model NO.: SL500X Specification: ISO Quality Management System HS Code: 8481804090 Trademark: KQ Origin: Shanghai China Pressure Sustaining Valve

The valve instantly opens when the pressure in the pipeline exceeds the preset safe level, thus relieving excessive pressure from the pipeline. When the pressure returns to normal, the valve closes slowly, at an adjustable speed. The valves also can be used to sustain upstream pressure to a preset pressure value.

The pressure sustaining valve is mainly used in fire fighting or other water supply systems to prevent the occurrence of over pressure or maintain the pressure of a fire fighting water supply system. After the fire pump is shut down, the valves can also serve to reduce the impact caused by water hammer. It can also be used as the water hammer eliminating device in large water supply systems. The valve utilizes a self-cleaning screen installed at the inlet of the valves control system, so suspended particles of relatively big specific gravities and diameters can not enter the control system. This guarantees the smooth and unobstructed circulation of the system, thereby ensuring the safe and reliable operation of the valve.
Technical Specification
Flange connection dimension: GB/T 17241.6-1998, GB/T 9113.1-2000
Nominal pressure: PN0.6MPa, PN1.0MPa, PN1.6MPa, PN2.5MPa
Nominal diameter: DN20~450mm
Suitable medium: Water
Inspection and test: GB/T 13927, API598
Body material: Cast iron, Ductile cast iron

Water Supplier and Fire Fighting Pressure Sustaining Valve

Water Supplier and Fire Fighting Pressure Sustaining Valve
Water Supplier and Fire Fighting Pressure Sustaining Valve
Technical Specification
Typical Installation Diagram
Nominal Pressure:1.0~1.6MPa






Medium: water



Work temperature: 0~80 



Design Standard:BS5163



Flange Standard:BS EN 1092














Part Material
PART NAME Material
Body &  Bonnet Pray Cast Iron, Ductile Cast Iron ,Cast Steel
Seat & Bushing & Disc Bronze
Stem & Spring Stainless Steel 
Diaphragm & O-ring NBR or EPDM
Seal Ring  PTFE

Dimension                                                                                                                                                   Unit:mm
DN         40        50        65        80         100        125       150       200        250        300         350           400          450
 L         200       203      216       241        292        330       356       495        622        698         787           914          978           
H1        516       516      520       537        596        653       709       805        855         953        990          1030        1030   
H          610       610      625       642        750        808       864      1135       1185      1325       1385         1445        1445  

Contact us if you need more details on Pressure Sustaining Valve. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Water Control Valve Psv、Sustaining Valve. If these products fail to match your need, please contact us and we would like to provide relevant information.

Product Categories : Control Valve

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