Safety Relief Valve 500X
I. Introduction:
The 500X Pressure Relief/Sustaining Valve is mainly used in fire protection or other water supply systems to prevent system overpressure or maintain the pressure of fire protection water supply systems. After the fire pump is shut down, it also has the characteristic of preventing suspended particles with larger specific gravity and larger diameter from entering the control system, ensuring unobstructed system circulation and enabling the valve to operate safely and reliably. The system operates smoothly, has high strength, and a long service life. It is very suitable for pipelines with a diameter below 600. A hydraulic control valve is a valve controlled by water pressure, consisting of a main valve and its attached pilot pipe, pilot valve, needle valve, ball valve, pressure gauge, etc. Depending on the purpose, function, and location of use, it can be transformed into remote float valves, pressure reducing valves, slow-closing check valves, flow control valves, pressure relief valves, hydraulic electric control valves, pump control valves, etc.
A filter must be installed before the 500X Pressure Relief/Sustaining Valve, and it should be convenient for sewage discharge.
II. Working Principle:
1. As a pressure relief valve: When the pilot valve of the pressure sustaining/relief valve is adjusted to the pressure relief state, water flows to the outlet through the needle valve, main valve control chamber, ball valve A, pressure relief/sustaining pilot valve, and ball valve B. At this time, the main valve is in the open state. When the inlet pressure exceeds the set safety value of the pressure relief/sustaining pilot valve, the pressure relief pilot valve will automatically open, and part of the water will be discharged through the ball valve C to relieve the pressure of the pipeline. When the pressure returns to the safety value, the pressure relief valve will automatically close. When used as a pressure relief valve, all ball valves are normally open.
2. As a pressure sustaining valve: When the pilot valve of the pressure sustaining/relief valve is adjusted to the pressure sustaining state, as long as the water pressure at the main valve inlet is lower than the set value of the pilot valve, the pilot valve will close. The main control chamber builds up pressure, and the main valve closes. When the upstream water supply pressure of the main valve exceeds the set pressure of the pilot valve, the pressure sustaining pilot valve can open, the water in the control chamber is discharged to the outlet through the ball valve, the control chamber depressurizes, the main valve opens, and water supply starts, thus maintaining the upstream water pressure. When used as a pressure sustaining valve, the ball valve C is normally closed or replaced with a plug!
III. Technical Parameters:
Nominal Pressure (Mpa) | Shell Test Pressure (MPa) | Seal Test Pressure (MPa) | Applicable Medium | Medium Temperature (℃) |
1.0 | 1.5 | 1.1 | Water | 0-80 |
1.6 | 2.4 | 1.76 | ||
2.5 | 3.75 | 2.75 |
IV. Part Materials:
Part Name | Part Material |
Valve Body and Bonnet | WCB |
Valve Seat and Disc | Copper Alloy |
Seal Ring and O-Ring | Dingjing Rubber |
Stem | 2Cr13 |
Spring | 50CrVA |
Needle Valve | Copper Alloy |
Ball Valve | Copper Alloy |
Float Valve | Copper Alloy |
Miniature Filter | Stainless Steel |
| Machinery & Equipment/Valves/Safety Valves | |
