Non-Return Valve

Name: Non-Return Valve
Availability: InStock
Rating: 5 (1 reviews)

Key Specifications / Features

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Detail Information

Specifications:
Nominal diameter: 1/2 Inch-48 Inch (DN15-DN1200).
Pressure range: Class 150-2500 LB (PN16-PN420).
Body Materials: Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel.
Trim (Disc, Stem): Carbon Steel, Stainless Steel, Duplex Steel, Alloy Steel.
End Connection: RF, RTJ, BW.
Working temperature: -196℃ - +560℃.
Suitable Medium: Water, Steam, Oil and natural gas, etc. (Different raw material for different medium) Cryogenic, soft seat insert design is available for tight shut off where required.
Design and Manufacture: BS 1868, ASME B16.34, API 6D.
Inspection and Test: API 598, API 600 or API 6D, DIN 3230.
End Flange Dimension: DIN 2543-2545, DIN 2501, ASME B16.5 (for NPS≤24, ASME B16.47 series B, API 605, ASME B16.47 A Series, MSS SP-44 (for NPS>24).
BW end Dimension: ASME B16.25.
Face to Face and End to End: ASME B16.10, MSS SP-71, DIN 3202 F1, BS 4090, BS 5153.
Pressure-temperature ratings: ASME B16.34.
Wall Thickness Dimension: API 600, BS 1868.

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FAQs

What Are Rising Stem & Non-Rising Stem Gate Valves?

What is a Non-Rising Stem Gate Valve?

A valve where the stem does not move vertically but rotates internally to raise or lower the gate. This design is ideal for installations with limited vertical space.

How Does a Non-Rising Stem Gate Valve Work?

The handwheel turns the stem, which in turn moves the gate up or down inside the valve body without changing the external height of the stem.

How Does a Rising Stem Gate Valve Work?

The handwheel lifts the stem and gate together, providing a visual indication of whether the valve is open or closed.

Which Valve Should I Choose?

Use a rising stem valve for above-ground applications where visibility and ease of maintenance are important.

Use a non-rising stem valve for underground or space-limited installations.

Conclusion

The choice between rising stem and non-rising stem gate valves depends on your specific application needs. For clear valve status indication and easy maintenance, go with a rising stem valve. For compact installations, a non-rising stem valve is the better option.