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Self-operated pressure control valve The self-operated pressure control valve is a self-adjustable actuator product by using self-energy of being adjusted medium. The biggest characteristic of this product is to be operated in the workplace without electricity and gas, thus, both the energy resources can be economized and the pressure setting value can be adjusted willingly during its operation. Adopting the feature of quick opening flow, it is with sensitive action and excellent sealing performance. Thus, it is suitable for automatic control on reducing, stabilizing and relieving pressure by gas, liquid and steam media of various industrial equipment widely used in petroleum, chemical industry, electricity, metallurgy, food, textile, machine manufacturing and residential buildings.   
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Main Technical Parameters
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Nominal diameters DN(mm) |
15、20、25、32、40、50、65、80、100、125、150、175、200、250 |
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Nominal pressure PN (MPa) |
1.0、1.6、2.5、4.0、6.4 |
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Materials of valve body |
ZG230-450WCB |
ZG1Cr18Ni9 |
ZG1Cr19Ni12Mo2 |
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工Operating temperature t (℃) |
-25~350 |
-29~500 |
-29~500 |
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Materials of valve core and valve seat |
Hard seal: 1Cr18Ni9, 1Cr18Ni12Mo2 |
Soft seal: rubber ring inlaid with stainless steel |
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Pressure balance |
Stainless steel bellows (DN15 ~ 125) |
Balancing diaphragm (DN150 ~ 250) |
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Adjustable range of pressure Kpa |
15~140；120~300；280~500；480~1000 |
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Action mode |
Pressure closed type and pressure opened type |
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Operation environment |
Environmental temperature -10 ~ 70℃Humidity ≤ 95% No condensation Avoid corrosive gases in the air | |||