China supplier high quality cast iron valve relief valve factory price

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US $15-70 / Piece | 1 Piece/Pieces (Min. Order)
Supply Ability:
1000 Piece/Pieces per Month
Qingdao, Xingang
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Quick Details
Standard or Nonstandard:
Medium Pressure
Temperature of Media:
High Temperature
Port Size:
Place of Origin:
Shandong, China (Mainland)
Model Number:
Brand Name:
Product name:
relief valve
Body material:
cast iron
Normal Colse
Dezhou, Shandong
Packaging & Delivery
Packaging Details
standard or as you required
Delivery Time
according to the quantity
Video Description

                  China supplier high quality cast iron valve relief valve factory price


relief valve


1. Introduction of relief valve

    Relief valve is a kind of hydraulic pressure control valve. In hydraulic equipment, the relief valve mainly plays the role of constant pressure relief, steady pressure, system unloading and safety protection. When the relief valve is in assembly or use, the combined sealing ring is damaged because of O-shaped sealing ring. Or install screws, pipe joints loose, may cause improper leakage.

     If the cone valve or the main valve core wear too large, or the sealing surface contact bad, will also cause internal leakage, or even affect the normal operation.


2. Main usage of relief valve 

      Constant pressure overflow: in the throttling regulation system of quantitative pump, the quantitative pump provides constant flow rate. When the pressure of the system increases, the flow demand will be reduced. At this time, the relief valve opens and the excess flow overflows back to the fuel tank to ensure the inlet pressure of the relief valve. Namely pump outlet pressure is constant (valve opening often with pressure fluctuation).

       Pressure stabilization: the relief valve in series on the return road, relief valve back pressure, moving components increased stability.

      System unloading function: the remote control port of the relief valve is connected in series with the small relief solenoid valve. When the solenoid is electrified, the remote control port of the relief valve passes through the tank, and the hydraulic pump unloads the load. The relief valve is used as the unloading valve at this time.

      Safety protection function: the valve is closed when the system is working normally. Only when the load exceeds the specified limit (the system pressure exceeds the set pressure) opens the overflow, carries on the overload protection, Make system pressure no longer increase (usually cause relief valve setting pressure to be 10 / 20 higher than system maximum working pressure).

      In practical application, it is generally used as unloading valve, as remote pressure regulating valve, as high and low pressure multistage control valve, and as sequence valve to produce back pressure.





2. Charateristics of DBW series relief valve

Three modes of connection

For analysis and installation

For thread mounting

For integration block installation

Three types of pressure regulation


Hexagon adjusting cylinder screw for protective cover

Lock with calibration button




3. Parameters of DBW series relief valve

Diameter 1015202530
Working Pressure (Mpa)3535353535






4.Other main products of valves 

    electromagnetic valve

     eletro hydraulic valve 

     hand valve

      one-way valve

     pressure reduction valve

     unloading valve 

     sequence valve

     speed control valve

     cut-off valve

     pressure switch 

     balanced valve


 If you are interested in the valves above, pls tell me the specific model. No., then I will offer you the details. My wechat:+8613791342630  Lisa Sun.




5. Our company introduction 


       Dezhou Taigao Import and Export Co., Ltd. is located in Dezhou City, Shandong Province,China.

       Our company has machining center, CNC lathe, grinder, boring machine, rocker drill, pipe locking machine and other processing equipments. It mainly produces ultra-high pressure hydraulic products, including hollow hydraulic cylinder, ultra-thin hydraulic cylinder, single action cylinder, super-large tonnage double-action hydraulic cylinder, valve base, manual pump, electric pump, Hydraulic cracking tool, split stone rod, portable rebar extruder, portable rebar bending machine, portable rebar straightening machine, various hydraulic pipe locks, many rescue equipments. The company also provides sales of electromagnetic valve, plunger pump, cargo lifters, hydraulic pressure packing-machine, rescue electric equipment and hand valves.

    Dezhou Taigao import and export tries hard to create a professional sales company which has rich products and quality assurance to become one-stop service of purchase and wholesale of China's hydraulic accessories and equipments. 









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