Robust Backflow Protection for Critical Pipelines
Oswal Piston Check Valves use a guided piston that lifts under flow and seals on back-pressure, delivering dependable non-return performance with minimal wear. Ideal for process and pipeline duties across oil & gas, petrochemicals, power, LNG and hydrogen applications.
Pressure Class
Classes: 150#, 300#, 600#, 800#, 900#, 1500#, 2500#
Typical size range 1/2”–24” (custom sizes available as per project specification).
Materials of Construction (MOC)
High-strength, corrosion-resistant metallurgy options:
Trim/seat options tailored for erosive, corrosive and cryogenic services.
Product Specifications
| Size Range | As per project specification (typical 1/2" to 24") |
|---|---|
| Class |
150#
300#
600#
800#
900#
1500#
2500#
|
| MOC |
Carbon Steel
Low Alloy Steel
Low Temperature Carbon Steel
Low Temperature Alloy Steel
Stainless Steel
Duplex & Super Duplex Steel
Inconel
Monel
Hastelloy
|
| End Connections / Construction |
Flange End
Butt Weld End
Socket Welded
Screwed
Guided piston internals; bushing materials selected per service.
|
| Design Standard |
ASME B16.34
API 6D (as applicable)
BS 1868
|
| Testing Standard |
API 598
BS EN 12266-1
|
| Operation Type |
Manual
Gear Operated
Actuator Operated
|
| Industries |
Oil & Gas
Petrochemicals
Chemicals & Fertilizers
Green/Blue Hydrogen
Power
LNG
FPSO
Water
|
Why Choose Oswal Piston Check Valves?
Fast, Positive Closure
Guided piston responds quickly to flow reversal and minimizes slam.
Standards-Aligned
Pressure-temperature integrity per ASME B16.34; seat tests per API 598 / BS EN 12266-1.
Flexible Connections
Flanged, BW, SW and screwed options to suit diverse piping layouts.
Material Range
CS, SS, Duplex & super alloys for corrosive, sour and low-temperature services.
Get A Quote
Tell us your size, class, end connection and service—our engineers will configure the optimal solution.