Our company is 300X slow closing check valve manufacturer, factory and supplier. 300X slow closing check valve is a kind of intelligent valve, installed at the outlet of pump in high building's feeding system and other feeding systems to prevent the fluid flowing backwards, water-hammering and water-hitting. 300X slow closing check valve has the function of electric valve, non return valve , water-hammering eliminator and improve the safety of the feeding system. Just pressure the button of the pump motor , 300X Slow closed check valve can automatically open or close according to the operating procedure of pump with little pressure loss and large flow rate.
This product uses hydraulic self-control, does not need other devices and energy, easy maintenance, open and slow shut smoothly.
This series of valve products are widely used in high-rise buildings, living areas and other water supply network systems and urban water supply projects.
Working principle：
When the valve feeds water from the inlet, the water enters the main valve control room through a micro filter, a needle valve and a one-way valve, and then drains downstream through a ball valve. Because the needle valve opening is less than the ball valve opening, that is, the main valve control room drainage speed is greater than the water intake speed, so the control room pressure reduces, acting on the lower end of the main valve disc inlet pressure open the main valve downstream water supply.
When the pipeline stops water supply, if the downstream water begins to flow back, part of the backflow water enters the main control room through the ball valve. Because of the unidirectional valve, the backflow water can not flow out of the main control room, causing the main control room to gradually pressurize, slowly closing the main valve.
PN(Mpa)：1.0-2.5
Size(mm)：DN50-DN600
Connection ends ：GB/T 17241.6 GB/T9113
Inspection & Test ：GB/T13927 API598 BS6755
Main Material：Cast Iron/Ductile Iron/Stainless Steel/Brass
Temp.( ℃)：0-80
Service：Water
300X Slow closing check valve closes automatically in case of prevent mediums back-flow. The 300X Slow closing check valve allows flow when inlet pressure in higher than the outlet pressure.
The 300X Slow closing check valve has the principal of slow-open, quick-close and slow-close into one to prevent water hammering when the pump starts or closes. 300X Slow closing check valve opens and closes at controlled speed to ensure smooth flow.
Features：
Convenient installation and adjustment
Stable, safe and reliable performance
Long service life
Products Display
Used on the pump outlet of a water supply system to prevent mediums back-flow, water hammer and water shock. It has three functions as an electric valve, check valve and water hammer remover.
300X Slow closing check valve is capable of improving the safety and reliability of the water supply system effectively through integrating the technical principle of slow-open, speed valve, slow-close, and removing water hammer and preventing of both pump-starting and pump-stopping water hammer.
The gate can carry out open-close automatically upon the operation rules of the water pump just by operating the pump to open or close electrically. Hydraulic Check Valves features by the big flow and small pressure loss, reliable sealing performance, easy installation, debugging and maintenance and long duration.
Notes:
Size below DN 450 is Diaphragm type 300X Slow closing check valve
Size equal and above DN 500 is piston type 300X Slow closing check valve
Applicatlisn：
Water projects
High buildings
Water treatment industry
Power plant
Chemical industry
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