Product Code : VF--ZCC-A1-CU
Pilot operated safety valve
Product caliber: DN25-200
Product pressure: 0.6 ~ 10.0MPa
Manufacturing standards:
China GB, JB, HG, API, ANSI, DIN, JIS, JPI, BS production. Body material: copper, cast iron, cast steel, carbon steel, WCB, WC6, WC9, 20#, 25#, forged steel, A105, F11, F22, stainless steel, 304, 304L, 316, 316L, chromium molybdenum steel, low temperature steel, titanium alloy steel, etc. Working pressure 1.0Mpa-50.0Mpa. Operating temperature: -196℃-650℃. Connection method: internal thread, external thread, flange, welding, butt welding, socket welding, sleeve, clamp. Driving mode: manual, pneumatic, hydraulic, electric
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Product Introduction:
Pilot operated safety valve is a new type of safety valve composed of main valve and pilot valve. The pilot valve responds to the medium pressure of the system to control the on-off action of the main valve.
How it works:
When the system is working normally and the pilot type safety valve is closed, the system pressure is transmitted to the dome air chamber on the top of the main valve disc through the inlet pressure pipe, the pilot valve and the gas chamber pressure pipe, which creates a downward net force on the main valve disc and makes the main valve in the closed state. When the system pressure reaches the setting pressure, the pilot valve opens and the sliding shuttle closes the pilot valve intake channel, and the pressure of the main valve air chamber is discharged and relieved through the pilot valve. Since the system pressure is higher than the return pressure, the sliding shuttle closes the intake channel, thus blocking the flow of fluid in the pilot valve. At this time, the pressure of the main valve air chamber drops sharply, the main valve valve flap is fully opened, and the fluid is released and depressurized through the main valve. When the system pressure is reduced to a certain value, the spring force of the pilot valve overcomes the force of the valve inlet pressure on the slide shuttle, the pilot valve returns to the seat, the ejector rod pushes the slide shuttle, and finally the fluid re-enters the dome air chamber of the main valve and closes the main valve.
Structural features:
1, the valve seat soft seal to ensure the safety valve before and after the good sealing.
2. Allow the working pressure to be close to the setting pressure of the safety valve.
3, small overpressure can make the safety valve main valve quickly reach the full open state.
4. The operating performance and opening height of the safety valve are not affected by back pressure.
5. Adjustable opening and closing pressure difference.
6, the pilot valve does not flow structure design to reduce harmful media emissions and environmental pollution.
7. The setting pressure of the safety valve can be detected online
Scope of application:
Pilot operated safety valves are particularly suitable for applications with high back pressure, large flow, high pressure and compact installation locations. Pilot type safety valve is mainly used in oil and gas, chemical, electric power, metallurgy and urban gas and other fields, is the best overpressure protection device for pressure equipment, containers or pipelines
Packing of Standard Packing:
Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 442 gallon liquid totes Special package is available on request. ATTs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.
