High Quality Industrial Lever arm and weight swing check valve China factory supplier Manufacturer
What's Lever arm and weight swing check valve ?
Lever arm and weight swing check valve is a type of swing check valve mounted with air cushion cylinder to prevent slam and water hammer.it consists of a valve body,a bonnet,and a disc that is connected to a hinge. The disc swings away from the valve-seat to allow flow in the forward direction,and returns to valve-seat when upstream flow is stopped,to prevent back flow.it allows full,unobstructed flow and automatically closes as pressure decreases.These valves are fully closed when the flow reaches zero and prevent back flow.
the valve is made of cast iron,ductile iron, is mainly used for water supply and drainage system, and other industrial sectors of the pipeline outlet to prevent medium countercurrent in low pressure and normal temperature.it could be mounted with closure control devices include Air Cushioned Cylinder, Oil Controlled Cylinder, Bottom Mounted Buffer, Lever & Spring and Lever & Weight.
Main features of Lever arm and weight swing check valve
Features and benefits of Lever arm and weight swing check valve
- *Trouble-free operation and easy maitanance
- *Full bore flow area, lower flow resistance.
- *Fitted with cushion cylinder and lever weight, connected with disc by same shaft. The open and close time or speed can be adjusted by regulating valve and slide weight.
- *Sealing performance stable, reliable and wear resistance. Long use life, No vibration, No noise.
Working principal of Lever arm and weight swing check valve:
- 1. When upstream pipe increase the water pressure, the valve disc will be pressed open.The disc shaft will drive the cylinder piston and the lever and weight up.
- 2. When the upstream water pressure higher than the valve open pressure, the valve disc will be pressed open. The cylinder piston will be drive open and inhale. When the upstream water pressure stop or back pressure, the valve disc will be close quickly by the disc deadweight, lever weight and back pressure. The cylinder piston fall down and the air inside the cylinder will start to produce damping force. More closing to the valve seat, more damping force it happened. When the disc closing to 30% open position, the damping force will be significantly increased. The disc will start to close slowly.
Technical specifications of Lever arm and weight swing check valve
Technical specifications of Lever arm and weight swing check valve
| Design and Manufacture | BS5153/DIN3202 F6/AWWA C508 |
| Face to face | EN558-1/ANSI B 16.10 |
| Pressure rating | PN10-16,Class125-150 |
| Nominal diameter | DN50-DN600,2″-24″ |
| Flange ends | EN1092-1 PN6/10/16,ASME B16.1 Cl125/ASME B16.5 Cl150 |
| Test and Inspection | API598/EN12266/ISO5208 |
| Body and disc | Cast iron,Ductile iron |
| Air cushion cylinder | Aluminum alloy |
Product Show: Lever arm and weight swing check valve
Application of Lever arm and weight swing check valve
This kind of Lever arm and weight swing check valve is widely utilized in pipeline with liquid & other fluids.
- *HVAC/ATC
- *Water supply and treatment
- *Food and Beverage Industry
- *Industrial environmental protection
