Van Một Chiều ASAHI AV

Van Một Chiều ASAHI AV

Check valves are self-contained, automatic valves, which are used to prevent the reversal of flow in a line. When open and under flow pressure, the checking mechanism will move freely in the media, offering very little resistance and minimal pressure drop. Asahi/America provides two basic types of check valves: swing check valves and ball check valves. A swing check valve utilizes a swinging disc, which requires only minimal back pressure to close the valve. This valve can also be modified, with a lever and weight or spring, to assist in seating faster to eliminate shock. The Asahi/America ball check valve employs a free moving ball, which unseats to permit flow in one direction, but seals against a seat to prevent backflow. Both types of valves may be installed vertically or horizontally.



Ball Check

Asahi Ball Check Valves

Applications:

Chemical processing, bleach plants, aquariums, mining, water treatment, landfills, swimming pools, power plants

Size:

True Union: 15-50A

1/2" - 2"

Single Union: 80-100A

3" - 4"

Bodies Materials:

PVC, CPVC, PP and PVDF

Seat & Seals:

EPDM, FKM, PTFE

End connections:

Socket, Threaded, Flanged, Butt End

Backflow Prevention

The valves prevent back flow in horizontal or vertical lines. They require minimal back pressure to seat completely.

Compact and Light

The BALL CHECK and BALL FOOT VALVES are so compact and light that they can be installed in a limited space. They are also easy to maintain, because of minimal internal parts.

The True Union Ball Check Valve body can be removed from the pipe line by loosening the union nuts at its both ends


Swing Check

Asahi Swing Check Valve

Applications:

Tank inlets/outlets; preventing backflow into a pump; one-way mixing; water hammer mitigation; pressure balancing; process intakes. In the following industries: chemical processing, bleach plants, aquariums, mining, water treatment, landfills, swimming pools, power plants

Sizes: 20 – 200A

3/4" – 8"

Body:

Hi-PVC, PP, PVDF

Seat & Seals:

EPDM,FKM,PTFE

Models:

Flanged Connection Only

v The SWING CHECK VALVE prevents backflow, thus protecting equipment, such as a pump.

v Being of an swing arm type, the valve gives little resistance to flow.

v The SWING CHECK VALVE is highly resistant to corrosive chemicals, acid and alkaline, because of its plastic construction.

v To maintain the SWING CHECK VALVE, only the bonnet lid has to be removed, without taking the body out of pipeline.


Wafer Check

Asahi Wafer Check Valve

Applications:

Tank inlets/outlets; preventing backflow into a pump; one-way mixing; water hammer mitigation; pressure balancing; process intakes. In the following industries: chemical processing, bleach plants, aquariums, mining, water treatment, landfills, swimming pools, power plants

Sizes: 80 – 300A

3” - 12”

Bodies:

PVC

Seals:

EPDM or FKM

Models:

Wafer Style

High strength

Capitalizing on the stress analysis, they relieve users of any concerns about the strength of resin-made wafer checks.

High corrosion resistance

All components contacting fluid are made of resins. In addition, springs are coated.

Lightweight and compact

Their weights are about one third to one fifth those of metal valves. With small interfaces, they facilitate piping work.

Cost reduction

No gaskets are needed when piping. With integrated stoppers, they help reduce costs.


Foot Valves

Asahi Foot Valves

Applications:

To protect pump from suspended solids and impurities

Sizes: 15 – 100A

1/2” - 4”

Bodies:

PVC

Seals:

EPDM or FKM

Models:

Socket End, Threaded End, Flanged End

Backflow Prevention

The valves prevent back fiow in horizontal or vertical lines. They require minimal back pressure to seat completely.

Compact and Light

The BALL CHECK and BALL FOOT VALVES are so compact and light that they can be installed in a limited space. They are also easy to maintain, because of minimal internal parts.



Thông số kỹ thuật

Sizes:

- True Union Ball Check Valve: 15A – 50A (1/2” – 2”)

- Single Union Ball Check Valve: 15A – 100A (1/2” – 4”)

- Swing Check Valve: 15A – 200A (1/2” – 8”)

- Wafer Check Valve: 100A – 300A (4” – 12”

- Ball Foot Valve: 15A – 100A (1/2” – 4”)

Material:  PVC, CPVC, PP & PVDF

Connection: Socket, Threaded, Spigot and Flanged

Seats & O-ring:  EPDM, FKM (Viton) and Others