High-Pressure Bi-Directional Knife Gate Valve
This is a specialized High-Pressure Bi-Directional Knife Gate Valve, suitable for general and severe service industrial applications. This valve is engineered to provide reliable, high-integrity shut-off across a broad range of sizes and material requirements.
Design and Compliance
This knife gate valve is specifically designed for robustness and high-pressure capability, maintaining the effective slurry-handling characteristics of traditional knife gate valves.
| Design Feature | Specification |
| Type | Bi-Directional Knife Gate Valve |
| Standard Service | Designed to MSS SP-81 (Standard Practice for Stainless Steel and Other Composite Material Knife Gate Valves). |
| Severe Service | Designed to MSS SP-135 (Standard Practice for High-Pressure Knife Gate Valves), ensuring integrity in more demanding applications. |
| Connection Standard | Flanged to PN10 / Class 150, offering compatibility with common international piping systems. |
Size, Pressure, and Testing
The working and testing pressures vary depending on the valve size, reflecting sound engineering practice to maintain safety and performance across a wide diameter range.
| Parameter | Size Range (DN/Inch) | Pressure Rating |
| Nominal Size Range | DN50 – DN800 ($2” – 32”$) | N/A |
| Working Pressure (Small Bore) | DN50 – DN200 ($2” – 8”$) | 16bar |
| Working Pressure (Large Bore) | DN250 – DN900 ($10” – 36”$) | 10bar |
| Testing Pressure (Shell) | DN50 – DN200 ($2” – 8”$) | 24bar |
| Testing Pressure (Seat) | DN50 – DN200 ($2” – 8”$) | 16bar |
| Testing Pressure (Shell) | DN250 – DN900 ($10” – 36”$) | 15bar |
| Testing Pressure (Seat) | DN250 – DN900 ($10” – 36”$) | 10bar |
Note: The working pressure for the larger bore (10” – 36”) is consistently 10bar, while the smaller bore (2” – 8”) offers a higher rating of 16bar.
Material Options for Severe Service
This valve is available in a variety of high-performance alloys to suit corrosive, abrasive, and high-temperature environments.
- Standard Corrosion Resistance: Stainless Steel
- High Strength/Chloride Resistance: Duplex Stainless Steel
- Extreme Chemical Resistance: Hastelloy
- Maximum Corrosion/Lightweight: Titanium
- Other: Custom materials available upon request to meet specific application needs.
For reliable, high-pressure isolation in your most demanding lines, choose a TOT Valve solution compliant with MSS SP-81 and MSS SP-135.
Contact us to specify the correct alloy and pressure rating for your severe service application today.
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