Ductile Iron Pressure Holding And Safety Relief Valve for Fire Fighting System

Fire Fighting System Use Ductile Iron Pressure Holding And Safety Relief Valve

Product introduction: 

Fire fighting valve products are control accessories on industrial and building pipelines. Fire fighting valve is the most important controlled accessory on industrial and building pipelines, normally consisting of valve body, opening and closing mechanism, and valve cover. Simple structure and reliable sealing.

Most fire valves are connected with clamps, making the complex valve installation and pipeline connection process simple, fast, and convenient. Taking pipeline connection technology a big step forward.

The 8500X pressure relief/holding valve consists of a hydraulic control connection system consisting of a main valve, pilot valve, needle valve, ball valve, micro filter, and pressure gauge. By utilizing hydraulic automatic operation, it can be used as both a pressure relief valve and a pressure holding valve. When using a pressure relief valve, the water supply pressure can be maintained below the set safety value, while maintaining the main upstream water supply pressure. Its working principle is that when the pilot valve is adjusted to a pressure relief state, water flows to the outlet through the needle valve, main valve control room, ball A, pilot valve, and ball valve B. At this time, the main valve is in an open state. When the inlet pressure exceeds the safety value set by the pilot valve, the pressure relief pilot valve will automatically open and release some water through ball valve C to relieve pressure in the pipeline. When the pressure returns to a safe value, the pressure relief valve automatically closes. When acting as a pressure relief valve, each ball valve remains open. When the pilot valve is normally open. When the pilot valve is adjusted to a holding pressure state, as long as the inlet water pressure of the main valve is below the set value of the pilot valve, the pilot valve will close. The main control is to increase the pressure and close the main valve. When the upstream water supply pressure of the main valve exceeds that of the pilot valve and is discharged to the outlet, the control room opens the pressure main valve to start water supply, which maintains the upstream water pressure. When used as a pressure holding valve, ball valve C is normally closed or replaced with a plug.

Product technical parameter:

Product features:

1. High sensitivity and safe pressure relief.
2. Quick opening and slow closing of valve disc, without water hammer impact.
3. Smooth operation without noise.
4. Long service life.
5. Novel and reasonable structure, reasonable use of hydraulic principle control theory.