Pneumatic Knife Gate Valve
Description
Pneumatic Knife Gate Valve Technical Data Sheet
Project Name: ________________________
Project No.: ________________________
Tag No.: ________________________
Date: ________________________
1. Valve General Information
| Parameter | Specification |
|---|---|
| Valve Type | Knife Gate Valve |
| Valve Design | Bonnetless (Wafer or Lug Type) |
| Gate Design | Rising Stem, Knife Edge Gate |
| Nominal Size (DN / NPS) | ______ mm / ______ inch |
| Pressure Rating | ______ bar / ______ psi (e.g., 10 bar / 150 psi) |
| Face-to-Face Standard | MSS SP-81 / API 609 / Manufacturer Standard |
| End Connection | Wafer Type (Flange-less) / Lug Type (Tapped Lugs) |
| Flange Drilling | ASME B16.5 Class 150 / PN10 / PN16 (Specify) |
2. Body Materials of Construction
| Component | Material |
|---|---|
| Body | ASTM A351 Grade CF8M (316 Stainless Steel) |
| Gate | ASTM A240 / AISI 316 Stainless Steel |
| Seat (Resilient) | Integral Metal Seat / Replaceable Metal Seat / EPT / Nitrile (Specify) |
| Stem | AISI 316 Stainless Steel |
| Packing Gland | AISI 316 Stainless Steel |
| Packing | PTFE / Graphite / Greased Packing |
3. Bonnetless Design Features
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Construction: Standard Bonnetless wafer body design allows the valve to be sandwiched between pipeline flanges.
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Sealing: Utilizes a one-piece gate that slices through media. Seat can be metal-to-metal or resilient (rubber) for bubble-tight shut-off on slurries.
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Packing: Self-adjusting or chevron type packing provides stem seal and helps wipe the gate clean.
4. Pneumatic Actuator
| Parameter | Specification |
|---|---|
| Actuator Model | ________________________ |
| Operation Type | Double Acting (DA) |
| Fail-Safe Position | Fail Lock / Fail Last Position (Requires accessories) |
| Supply Air Pressure | ______ bar (Typical: 5.5 ~ 8 bar) |
| Actuator Type | Rack and Pinion / Scotch Yoke (Specify) |
| Cylinder Material | Aluminum Alloy / Epoxy Coated |
| Mounting Standard | ISO 5211 |
| Torque Output | Actuator Torque: _____ Nm @ _____ bar (with 20-30% safety margin) |
| Air Connections | 1/4″ PT / 1/2″ PT (Specify) |
| Linear Stroke | Direct linear movement (Stem travels to open/close) |
5. Control Accessories
5.1 Limit Switch Box (Position Feedback)
| Parameter | Specification |
|---|---|
| Model | ________________________ |
| Mounting | Directly mounted to actuator (VDI/VDE 3845 pattern) |
| Enclosure Protection | IP65 / IP67 / Weatherproof |
| Enclosure Material | Polycarbonate / Die-cast Aluminum |
| Switch Type | Mechanical SPDT (2 x or 4 x) / Proximity Sensor (Inductive) |
| Conduit Entry | 1/2″ NPT / M20 x 1.5 |
| Electrical Rating | 250VAC, 5A / 125VAC, 10A / 24VDC |
| Indicator | Visual dome for open/closed status |
5.2 Optional Accessories (Check if required)
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Solenoid Valve: 24VDC / 110VAC / 220VAC (NAMUR mounted)
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Air Filter Regulator: With pressure gauge
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Speed Control Valves: For regulating opening/closing time
6. Performance & Operating Conditions
| Parameter | Specification |
|---|---|
| Service Fluid / Medium | ________________________ (Slurry / Powder / Liquid) |
| Design Temperature | ______ °C (Dependent on seat material: -10°C to +120°C typical for rubber) |
| Max. Operating Pressure | ______ bar(g) |
| Shut-off Class | Zero Leakage (Resilient Seat) / Metal-to-Metal (Class III / IV) |
| Flow Direction | Unidirectional / Bidirectional (Specify) |
7. Others
| Parameter | Specification |
|---|---|
| Valve Weight | ______ kg |
| Painting / Coating | None (SS316 natural finish) |
| Special Requirements | ________________________ |
Notes:
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This data sheet is intended for a Knife Gate Valve (slurry/service), not a standard gate valve.
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Double Acting actuators require air pressure to both open and close. If air supply fails, the valve remains in its last position (fail-last).
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Ensure the Limit Switch Box is correctly wired for remote position indication.
