Hydraulic Non-Slam Check Valve

Basic Information
This non slam check valve prevents backflow of media and reduces water hammer to achieve the safe and quiet effect.
Features
The no slam check valve has features as follows:
1.Small fluid resistance, large flow;
2. Automatic control using medium energy;
3. Prevent water hammer phenomenon;
4. Slowly-closing silencing.
Principle
When the pipe supplies water from the inlet end of the valve, the water from the needle valve and one-way valve enters the valve cover control room and then is discharged downstream through the ball va lve. Due to the small opening of the needle valve, the discharge speed of the control room is greater than that of the inlet to replenish water, thus reducing the pressure in the control room. The inlet pressure acting under the main valve disc all the time lifts the main valve disc, thereby opening the main valve disc and supplying water downstream. When the pipeline stops supplying water, the downstream water begins to flow back. Due to the effect of the one-way valve, the backflow water cannot flow out after entering the valve cover control room through the ball valve. As a result, the pressure of the valve cover control room increases gradually and the main valve disc is closed tightly.
Installation and Commissioning
Needle valve and ball valve adjust together to get the best opening or closing speed. For specific use, please consult ZhengFeng Valve Group.
Product scope , Standards & Materials
Size Range: 2"~24"
Pressure Rating: 10bar ~ 25bar
Face to Face Dimensions: AMSE B16.10, EN558-1
Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2
Coating: Fusion Bonded Epoxy Coating
Inspection and Test: ISO 5208 / EN 12226-2
ZhengFeng is an non slam check valve manufacturer ,offering non slam valve,also called anti slam check valve to meet your need
Part Material Standard
Body Ductile Iron EN 1563/DIN 1693
Bonnet Ductile Iron EN 1563/DIN 1693
Trim Stainless Steel 431 EN10088-1/ASTM A959
Seat Stainless Steel 431 EN10088-1/ASTM A959
Diaphragm EPDM / NBR ISO 4633
Pilot Valve Stainless Steel 431 EN10088-1/ASTM A959
For the materials options not listed, consult factory.
ZhengFeng manufactures valves in more than 50 different alloys.