China Velan Cast Steel Gate Valves Manufacturers, Suppliers, Factory

Check valve for water pump is a valve that is used to prevent backflow in a piping system. The pressure of the liquid passing through the pipe will open the valve, while any reversal of flow will close the valve. The check valve will help your water system maintain pressure when the pump shuts off and also prevent backspin, upthrust, and water hammer.

Telescopic butterfly valve is suitable for water supplying and draining, gas pipe as adjust flux and cut off medium is foodstuff, pharmacy, chemical industry, petroleum, electric power with temperature not more than 80 degree, nominal pressure not more than 1.6 Mpa. It has function of compensation pipe expand with heat and contract with cold.

1. The double flow direction can bear pressure to realize the installation mode without flow direction restriction. 2. The design of all metal seal, the seat and sealing ring adopt steli alloy surfacing technology to solve the problem of poor sealing performance of butterfly valve under severe working conditions such as high temperature, high pressure and low temperature. triple eccentric butterfly valve can withstand pressure up to 2500 pounds, and the temperature resistance is as low as -196 ℃ to 850 ℃, the seal reaches 0 leakage and the control ratio is up to 100:1. 3.The triple eccentric butterfly valve seat and valve body are designed separately, and the valve plate and sealing ring are designed separately. The products can be matched and interchanged. The whole valve will not be scrapped because of the seal wear problem. triple eccentric butterfly valve can be used normally only by replacing the valve seat and sealing ring, thus reducing the use cost.

Pinless Butterfly Valve is a kind of valve which opens, closes and adjusts the fluid channel by the reciprocating rotation of the disc type opening and closing parts about 90 degrees. As a component used to realize the on-off and flow control of pipeline system, the pin-less butterfly valve has been widely used in many fields such as petroleum, chemical industry, metallurgy, etc.

Wafer check valve is also known as counter flow valve, check valve, back pressure valve, one-way valve. This kind of valve is automatically opened and closed by the force generated by the flow of medium itself in the pipeline, which belongs to an automatic valve.

The two sealing surfaces of the wedge gate valve are wedge-shaped.The disc of the wedge gate valve is the gate plate. The movement direction of the gate plate is perpendicular to the direction of the fluid. Wedge gate valves are widely used in petrochemical, thermal power plants and other oil products, steam pipeline as connecting or cutting off the intermediate device of the pipeline opening and closing.