Dual Plate Check Valve
The dual Plate Check Valve is an all purpose non return valve that is much stronger, lighter in weight and smaller in size compared to a conventional swing check valve or life check valve.
The Double Plate Check Valve employs two spring-loaded plates hinged on a central hinge pin. When the flow decreases, the plates close by torsion spring action without requiring reverse flow.
This design offers the twin advantages of No Water Hammer and Non Slam simultaneously. All features put together make the Dual Plate Check Valve nrv one of the most efficient design.
MVS Duo Disc Check Valves are available in wafer design, flanged wafer design and extended design with flanged ends having face to face dimensions as that of a swing check valve. It is also referred as SILENT CHECK VALVE.
Design & Testing International Standard of Dual Plate Check Valve NRV
| Design Standard |
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API 594 / API 6D Standard |
| Inspection & Testing Standard |
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API 598 |
| Flange To Flange Distance |
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As Per ANSI B API 594 / API 6D / ANSI B 16.10 |
| End Connection |
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Wafer Type, Flangeless, Sandwich Pattern |
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Suitable to mount between two flanges. |
| Manufacturing Size Range |
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3″ (DN80) to 24″(DN 600) |
| Pressure Rating of Valve |
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150# |
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MOC (Bill of Material – BOM)
| Body & Disc Material |
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ASTM A 126 GR. B / IS 210 GR. FG 200/220/260 (Cast Iron) / Ductile Iron / Nodular C.I. |
|
: |
ASTM A 216 GR. WCB (Cast Carbon Steel) |
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: |
ASTM A 351 GR. CF 8 / CF 8M (SS 304 / SS 316) |
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ASTM A 351 GR. CF 3 / CF 3M (SS 304L / SS 316L) |
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ASTM A 351 GR. CN7M / ASTM A351 Gr. CF8C |
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ASTM A351 Gr. CD4Mcu / ASTM A351 Gr. CK3MCuN |
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ASTM A352 Gr. LCA / LCB / LCC |
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: |
ASTM A217 Gr. WC1 / WC6 / WC9 / C5 / C12 |
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ASTM A494 Gr. CW6MC / CW2M / CY40 / CU5MCuC |
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NACE MR0175 / NACE MR |
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| Seat Material |
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Soft Rubber Seat for Zero Leakage |
|
: |
Neoprene / EPDM / NBR / Bun – N / Viton / Silicon |
|
: |
Metal to Metal Body Disc Face contact seat |
|
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Stellite F6 Hard Face |
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| Hinge Pin / Stem |
: |
ASTM A 276 T – 304/316 (Stainless Steel 304/316) |
|
: |
ASTM A 276 T – 304L/316L (Stainless Steel 304L/316L) |
|
: |
Alloy 20 / Duplex Steel Steel / Super Duplex Steel |
|
: |
Hastelloy C / Hastelloy C 276 |
|
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| Spring |
: |
Inconel X 750 |
|
: |
S.S. 304/316/304L/316L |
Salient Features
Light Weight thus easier handling and self supporting.
More compact & Structurally sound design.
Same valve can be installed horizontally or vertically.
Only Dual Plate Check Valve which can be installed for flow upside down due to spring assisted closure.
Low Pressure Drop and reduced Energy Loss irrespective of Pressure Ratings.
Streamlined flow – way.
Efficient and Positive sealing under most flow and pressure conditions. Valve close before flow reversal, at zero velocity.
Inherently Non-Slamming. No external devices / attachments required.
Water Hammer almost non-existent.
Long life and trouble-free operation.