Principle:

after the pump stops,the medium flows reversely,the pressure of the valve upper cavity is bigger than that of the lower cavity to have the disc fall off and closed.while the speed contralling  the back -water to enter the diaphragm  can adjust the speed for the valve to be closed so as to get to the slow closing effect.

Purpose:

Used for the pump outlet of high buildings or other water supply system to prevent the medium from back-flow and reducee water hammers so as to get a safe and peaceful effect.

Characteristic:

Able to prevent water hammer and water attack from occurring,getting to the slow closing and silencing effect.as a check valve capable of adjusting and controlling the open -close speed,it can make a best open or close apeed on the site,when the pump is started or stopped.

how to reach our factory:
by plane:
from Beijing airport:240kms,3 hours by driving.
from Tianjin airport:150kms, 2 hours by driving.
by Train:
from beijing South railway station:224Kms, 1 hours
from Shanghai Hongqiao railway station:1167Kms, 4.5 hours
by Car:
from CangzhouXi railway station:45kms, 40 minutes.

Our address: Botou Industry Park,Cangzhou City,Hebei Province,China
Contact person to pick you up from air port or anyplace in China

Botou Shengfeng auto-valve Co,. LTD is a specialized manufacture enterprise that focuses producing, installing, sale and service. the main products include Gate Valve,Waterpower Control Valve,Center Line Butterfly Valve, Flanged Butterfly Valve, Metal Butterfly Valve, Check Valve, Microresistance Slow Close Check Valve, Multi-function Pump Control Valve and their series products. Moreover, we can produce control valve and pressure reducing valve that are different materials, pressures, specifications, actuation ways. Our products include more than 50 serials and 1200 species, and the annual production output is more than 8.000 metric tons. Shengfeng valves have been selling well all over China and exporting to Europe, America and other countries and areas, which are used widely in water supply and drainage, electric power, petrol chemical industry, metallurgy and other trades. Our products are quite creative, good quality, cheap price and excellent.