A Tappi knife gate valve is a specialized industrial valve engineered to manage the flow of fluids containing high concentrations of solids or contaminants. It features a full-bore design with a cast monoblock body and internal blade guiding supports that enhance sealing performance and reduce wear. The gate, typically made of polished stainless steel with rounded edges, moves vertically to isolate flow and cut through thick media. This valve is unidirectional, meaning it seals effectively in one direction, as indicated by the flow arrow on the valve body.Tappi knife gate valves are commonly installed between flanges or at the end of pipelines and are available in sizes ranging from DN50 to DN600. Their robust construction and efficient sealing make them ideal for demanding applications in pulp and paper processing, hydro power plants, wastewater systems, and other industrial sectors where reliable shutoff and minimal clogging are essential.
PR-FECT VALVES manufactures Tappi 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.