Pressure Relief Valve 1.6mpa Flange Water Conservancy Valve

Product introduction

The 500 pressure relief/pressure holding valve is automatically operated by water, and can be used as both pressure relief valve and pressure holding valve. When used as a pressure relief valve, it can maintain the pressure of the water supply pipeline below the set safety value; When used as a pressure retaining valve, it can maintain the water pressure upstream of the main valve above the set value and maintain the water supply pressure upstream of the main valve. The operation system is stable, easy to maintain and repair. This valve is used in the fire protection system to prevent pipeline overpressure or maintain pipeline pressure. After the fire protection system is closed, it can also reduce the impact of water hammer. It is also used in high-rise buildings, living quarters water supply network systems and urban water supply projects.

Connection size

Technical performance

The working principle

500 pressure holding/relief valve is composed of main valve and pilot valve control system. The main valve is divided into upper valve cover control room and lower valve body flow channel. Needle valve, ball valve, pressure relief pilot valve, etc. are connected by copper pipes to form pilot valve control system. When the pilot valve is adjusted to the pressure relief state, the feed water at the inlet end of the valve flows to the outlet through the needle valve, bonnet control room, pressure relief pilot valve and ball valve. At this time, the main valve is in the open state. When the inlet pressure exceeds the safety value set by the pressure relief pilot valve, the pressure relief pilot valve will automatically open, the pressure in the bonnet control room will decrease, and the main valve will release pressure. When the pressure recovers to a safe value, the main valve automatically closes. When the pilot valve is adjusted to the pressure holding state, as long as the water pressure at the inlet of the main valve is lower than the set value of the pilot valve, the pilot valve will close. At this time, the pressure in the control room of the main valve will rise, and the main valve will close.

Yuanda Valve Group Co., Ltd., founded in 1994, is headquartered in Yincun, Longyao, Hebei, China, the hinterland of Bohai Economic Rim surrounding Beijing and Tianjin. With a registered capital of RMB 200 million, Yuanda currently has 8 subsidiaries, of which 6 are in China and 2 overseas. Among them, the core company, which covers an area of 540,000m2 and has more than 3500 employees, is the largest high,midium and low-pressure valve manufacturing base specializing in valve development, manufacturing, and sales in China.

Yuanda has obtained DNV·GL, ISO9001: 2015、ISO14001:2015、OHSAS18001:2007, API6D（6D-0759）, CE, KS, and EAC certifications. Its""trademark is evaluated as Famous Trademark of China and Famous Brand in Hebei Province, and the product series produced under"" is a trademark registered in Korea and products produced under this trademark enjoy a good reputation in both international and domestic markets. Yuanda has been named “Credit Management AA-Rating Enterprise” by the General Administration of Quality Supervision, Inspection and Quarantine and granted the title of “China Quality Trustworthy Enterprise” by China Entry and Exit Inspection and Quarantine Association. It is also a holder of Manufacture License of Special Equipment Level A and Casting Certificates Grades B, B1, and B2, and a member of China Valve Association council, a corporate member of China Foundry Association, and a provincial enterprise technology center in Hebei. Yuanda has been granted the power to carry out import and export operations on its own and is an approved supplier of PetroChina (CNPC) and Sinopec, Guodian, Huaneng, Huadian, Datang and China Power, and China Aluminum, CCESCC, Shougang, Wuhan Iron and Steel Company, and Hebei Iron and Steel Company.

Yuanda manufactures to standards including GB/JB(china), ANSI, API, AWWA, DIN, BS, JIS, EAC, NF and so on, and uses HT200, HT250, QT400, QT450, WCA, WCB, WCC, CF3, CF8, CF3M, CF8M, 1Cr5Mo, LCB, among others, to produce a great variety of valves including gate valves, globe valves, ball valves, butterfly valves, check valves, diaphragm valves, pressure-relief valves, plug valves, and traps, which are available in 12 main categories, 200 series and 4000 specs, totaling 120,000 tons a year. These products are widely used in all civil sectors covering petroleum, petrochemical, chemical, power generation, metallurgy, water system, pharmaceuticals, urban construction, and water supply and drainage.