Ductile Iron Differential Pressure Bypass Valve Flange End Water Conservancy Valve

Product introduction

800X DIFFERENTIAL BYPASS BALANCING valve is a valve used to balance the pressure difference between supply/return water in air conditioning systems. The valve can improve the utilization of the system, maintain an accurate constant value of the differential pressure, and can minimize the noise of the system, as well as excessive differential pressure damage to the equipment, 800X Differential pressure balance is superior to other balance valve place is that it has no actuator, completely rely on the medium's own pressure difference to achieve the function of the balance system, saving energy and installation space, is an intelligent valve

Connection size

Main technical performance

The working principle of

The 800X differential pressure bypass balance valve consists of the main and differential pressure control pilot valves, needle valves, ball valves and pressure gauges to form a hydraulic control pipe system. There are two water chambers inside the main valve, diaphragm water chamber for water passage, diaphragm water chamber for pressure control chamber. Its working principle is: when the pressure difference between the inlet and outlet of the main valve changes, the pressure difference between the pipe A and the pipe B changes, changing the opening of the pilot valve. When the pressure difference is large, the pilot valve opening is large, the water discharge in the control room through C pipe increases, the pressure in the control room of the main valve decreases, the main valve opening increases, and the pressure difference between the inlet and outlet of the main valve becomes small. On the contrary, if the pressure difference between the main valve inlet and outlet becomes smaller, the pilot valve opening becomes smaller, the pressure of the main valve control room rises, and the main valve opening becomes smaller and the pressure difference of the main valve increases. This negative feedback effect stabilizes the pressure difference between the main valve inlet and outlet at the set value. The pressure difference between the inlet and outlet of the main valve can be set by setting the needle valve opening and the pilot valve spring pressure

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.