A pressure seal check valve prevents backflow in high-pressure systems, using a pressure-activated bonnet seal and a disc that automatically closes when flow reverses. These valves are essential in protecting pumps, compressors, and turbines from reverse flow damage. The pressure seal design ensures leak-tight integrity even under thermal cycling and vibration. Common types include swing, piston, and tilting disc check valves, depending on the flow characteristics and installation orientation. They are widely used in power plants, petrochemical units, and superheated steam systems.
PR-FECT VALVES manufactures Pressure Seal Check Valve in a wide range of sizes, materials, and pressure ratings, ensuring compatibility with diverse industrial applications and offering advanced technical features such as precision-machined gates and corrosion-resistant coatings for enhanced performance and durability.
| PRODUCT DETAILS | |
|---|---|
| Sizes | 1/4" to 250" |
| Pressure Class Ratings | ASME #600 to #4500 |
| End Connection | Screwed, Socket Weld, Flanged, Butt-Weld |
| Construction Types | O.S & Y. Rising Stem, Flexible Solid Wedge, Split wedge, others upon request |
| Salient Features | Pressure Seal, Fugitive Emissions, Metal Seats, Back Seating, Stem Extension, Bypass Arrangement, Equalizing Arrangement, Bypass and Equalizing Arrangement, Locking Arrangements etc. |
| Operator / Actuator | Handwheel, Gear, Actuator (Pneumatic, Hydraulic, Electro-Hydraulic and Electric Motorised) |
Note: Customized design available upon request, with pressure class ratings available in PN, PSI, BAR, kPa, and additional units to suit project specifications and regional standards.
| STANDARDS SPECIFICATIONS | |
|---|---|
| Design & Manufacture | API 600, ASME B16.34 |
| Face To Face | ASME B16.10, MFG Standard |
| End ConnectionsEnd Connections | ASME B16.11, ISO 7-1, BS 21 ASME B1.20.1, ASME B16.5/ B16.47 RF/FF/RTJ ASME 16.25, EN 1092ASME B16.11, ISO 7-1, BS 21 ASME B1.20.1, ASME B16.5/ B16.47 RF/FF/RTJ ASME 16.25, EN 1092 |
| Fire safe testing | ISO 10497/ API 607, API 6FA |
| Testing | API 6D, API 598, ASME B16.34 |
| Nace | NACE MR0175 / ISO 15156 and NACE MR0103 / ISO17945 |
| Fugitive emission | ISO 15848-1, API 624 |
Note: We’re flexible beyond the listed standards and happy to align with your specific needs.
| MATERIAL OF CONSTRUCTION | |
|---|---|
| Body / Bonnet / Yoke | Carbon Steel (ASTM A216 WCB, WCC, WCA, ASTM A105, ASTM A181), Low Carbon Steel (ASTM A352 LCB, LCC, ASTM A350 LF2), Stainless Steel (ASTM A351 CF8, ASTM A182 F304, ASTM A351 CF8M, ASTM A182 F316, ASTM A351 CF3, ASTM A182 F304L, ASTM A351 CF3M, ASTM A182 F316L, ASTM A351 CG8M, ASTM A182 F317, ASTM A182 F904L, ASTM A351 CK20, ASTM A182 F310, ASTM A351 CE8MN) Nickel alloys (B564 Monel, Inconel B564, B366), High Temp Alloys (Inconel 600, Inconel 625, Inconel 718, HastealloyX, Titanium Aloy) Duplex Stainless Steel (Duplex 2205, Super Duplex 2507, Lean Duplex 2101, Duplex 2304) Ductile Iron (ASTM A126 /ASTM A536, GGG50, GGG40) |
| Trim | Stainless Steel (SS304, SS316, SS304L, SS316L, SS317, SS310, SS904L), Nickel alloys, Duplex Stainless Steel, Exotic Materials. |
| Seat | HF-Metal to Metal Seats, others upon request |
| Stem Packing & Seals | PTFE/ RPTFE/ Special filled PTFE/Graphite/Graphoil |
| Gaskets | PTFE/ RPTFE/ Special filled PTFE/Graphite/Graphoil/Spiral Wounded |
| Fasteners | ASTM A193 Gr.B7/A194 Gr.2H, B7M/2HM, B8/8, B8M/8M, L7/4, B16/2H etc. |
Note: Additional material grades can be provided upon request to suit specific application requirements.