Products Description
Specifications
Ductile iron flex check valve is a type of non-return valve made from ductile cast iron, designed to prevent backflow in a piping system. It uses a flexible disc or seat mechanism instead of a rigid swing or ball, allowing smoother closure and reduced water hammer.
Material: Ductile iron body (often ASTM A536), which is stronger and more impact-resistant than standard cast iron.
Design: Typically features a flexible disc or elastomer-coated closure member.
Connection Types: Flanged, grooved, or wafer style.
Sizes: Commonly ranges from DN50 (2") to DN600 (24") or more.
Pressure Rating: Usually PN10, PN16, or ANSI Class 125/150.
Coating: Epoxy-coated for corrosion resistance.
Seal: EPDM or NBR for water, sewage, or other fluids.
Products Parameters
|
Model Number |
Flange Size |
W.Pressure |
Valve Type |
Color |
|
H44X-16Q-50 |
2" |
1.0/1.6Mpa |
Flexible Disc |
Red/Blue |
|
H44X-16Q-65 |
2.5" |
1.0/1.6Mpa |
Flexible Disc |
Red/Blue |
|
H44X-16Q-80 |
3" |
1.0/1.6Mpa |
Flexible Disc |
Red/Blue |
|
H44X-16Q-100 |
4" |
1.0/1.6Mpa |
Flexible Disc |
Red/Blue |
|
H44X-16Q-125 |
5" |
1.0/1.6Mpa |
Flexible Disc |
Red/Blue |
|
H44X-16Q-150 |
6" |
1.0/1.6Mpa |
Flexible Disc |
Red/Blue |
|
H44X-16Q-200 |
8" |
1.0/1.6Mpa |
Flexible Disc |
Red/Blue |
|
H44X-16Q-250 |
10" |
1.0/1.6Mpa |
Flexible Disc |
Red/Blue |
|
H44X-16Q-300 |
12" |
1.0/1.6Mpa |
Flexible Disc |
Red/Blue |
FAQ
Q: How does a flex check valve work?
When fluid flows in the forward direction, the flexible disc deflects to allow passage. If the flow reverses, the disc flexes back into the closed position, creating a tight seal that prevents backflow.
Q: Where are ductile iron flex check valves commonly used?
They are widely used in:
Water supply and distribution systems
Wastewater treatment plants
Irrigation systems
HVAC systems
Industrial fluid pipelines8.
Q: What is the typical pressure rating?
Most ductile iron flex check valves are rated for PN10, PN16, or Class 125/150.
Q: How is maintenance performed?
They require minimal maintenance. Periodic inspection of the flexible disc and cleaning of the sealing surfaces are recommended to ensure reliable operation.
Q: Can they handle slurry or sewage applications?
Yes, their unobstructed flow path and resilient seating make them suitable for handling raw water, sewage, and certain slurries.