A Bi-Directional knife gate valve is a specialized flow control device designed to regulate the movement of fluids in both directions within a pipeline. Unlike traditional unidirectional valves, this valve features a gate with a sharp, knife-like edge that can cut through thick media such as slurries, powders, or viscous liquids. Its unique design includes sealing surfaces on both sides of the gate, allowing it to maintain a tight seal regardless of the direction of flow. This makes it particularly useful in industries like mining, wastewater treatment, and pulp and paper, where flow reversal and abrasive materials are common. The valve operates by raising or lowering the gate to open or close the passage, ensuring reliable performance and minimal leakage under demanding conditions.
PR-FECT VALVES manufactures Bi-Directional Knife Gate 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 #150 to #300, PN6, PN10, PN16, PN24, PN40, PN64, PN100 |
| End Connection | Wafer, Lugged, Flanged |
| Construction Types | Sharp heavy-duty knife edge |
| Salient Features | Sharp heavy-duty knife edge, Metal Seats, Replaceable seats, Low Torque, Stem Extension, Locking Arrangements etc. |
| Operator / Actuator | Handwheel, Gear, Actuator (Pneumatic, Hydraulic, Electro-Hydraulic and Electric Motorised) |
Note: Customized design available upon request. We are not restricted to the pressure class ratings mentioned; we can provide options including PN, PSI, BAR, kPa, and others.
| STANDARD SPECIFICATIONS | |
|---|---|
| Design & Manufacture | MSS SP 81, ASME B16.34 |
| Face To Face | MSS SP 81, MFG Standard |
| End Connections | ASME B16.5/ B16.47 , EN 1092 |
| Testing | MSS SP 151, ASME B16.34 |
| Nace | NACE MR0175 / ISO 15156 and NACE MR0103 / ISO17945 |
Note: We are not limited to these mentioned standards
| MATERIALS 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 | Resilient seat with Metal Back-up Ring, HF-Metal to Metal Seats, EPDM, Nitrile, Viton, others upon request |
| Stem Packing & Seals | PTFE/ RPTFE/ Special filled PTFE/Graphite/Graphoil |
| Fasteners | ASTM A193 Gr.B7/A194 Gr.2H, B7M/2HM, B8/8, B8M/8M, L7/4, B16/2H etc |
Note: We are not limited to these mentioned Material.