DONJOY TECHNOLOGY CO., LTD
Established more than 30years, over 200 employees and 30 key technological team members , 4 inventions, 200 patents.
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Professional 3 Inch Hydraulic Check Valves Preventing Backflow With FPM Gasket
Option of Hydraulic check valves
1. Connection: Weld, Thread
2. SEAL: NBR, FPM,PTEF all according to FDA177.2600
3. Standard: DIN,SMS, RJT, IDF, ISO, 3A
Specification
| Product Name: | 3",SS316L Sanitary Check Valve, Thread Check Valve Preventing Backflow |
| Valve Body Material: | SS304 or SS316L |
| Seal Material: | EPDM |
| Max. Working Pressure: | 10Bar |
| Opening pressure: | 0.1-0.3bar |
| Max. Working Temperature: | 120 degree C |
| Availably size: | 1/2"-4" , DN10-D100 |
| Availably connection: | Thread,Weld |
| Availably standard: | DIN,SMS,3A |
| Certificate: | FDA,CE |
Applications:
1. Check valve is a valve that prevents the fluid from flowing back and ensures to flow in only one direction.
2. It can be used to prevent the flow less from returning avoid pipe-hammering
3. It is used in the food processing,beverages, wine, oil,cosmetics, pharmaceutical and chemical industries.
Drawing
Operating Principle
The valve opens when the pressure of the fluid exceeds the pressure to spring, When the two pressures are equalised, the valve closes, A stronger counter – pressure also makes the valve close.
Sanitary valves are two-port valves that feature two separate openings on their body. Fluid enters one opening and exits from the other. These valves help with applications that require liquids to flow in only one direction.
Sanitary valves come in two forms: horizontal and vertical.
Horizontal valves are suited to horizontal lines that need self-draining valves
Vertical valves can be used in either vertical or horizontal installations; in horizontal applications, vertical valves help when self-draining valves can’t maintain pump prime and temperature continuity
In the case of horizontal spring-check valves, product flow pushes a disc in the valve away from the seat. When forward flow pressure is removed, the electropolished spring will return the disc to its original position and hold it against the seat to keep it closed. Backflow pressure will also force the disc into the closed position.
Check valves help in scenarios that require the evacuation of process pipelines. This can occur for a host of reasons, especially those involving product recovery or drainage. Some applications may also require air agitation on the products in the pipelines or in the tanks they lead to. Check valves can accomplish this.
Things to Keep in Mind When Installing a Sanitary Check Valve
– Ball Check Valve –
In a vertical setting, the product has to flow from bottom to top so that gravity can push the ball in and out of the seat.In a horizontal setting, the curved portion of the valve needs to be upright and at 90 degrees to the pipe. This makes sure that the valve is free-draining and the ball sits properly.
– Disk Check Valve –
Disk Check Valves are not free-draining in a vertical setting. Therefore, for them to be free-draining, they need to be in a horizontal position.
Certificate
Donjoy manufacture products certified by 3A,CE,FDA and so on, according to GMP, EHEDG standard. Production strictly enforce ISO9001-2008 management system.