Description
A Carbon Steel Piston Valve is a linear motion valve designed for on/off service in high-pressure and high-temperature applications, especially steam. It operates by moving a precision-machined piston inside a matching sleeve to open or close the flow path, ensuring tight shut-off, minimal leakage, and long service life.
Construction & Materials
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Body & Bonnet:
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Carbon Steel (ASTM A216 WCB / A105)
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Piston:
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Alloy Steel / Stainless Steel (hardened & polished)
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Cylinder / Sleeve:
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Alloy Steel or SS with hard-faced surface
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Stem:
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Stainless Steel / Alloy Steel
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Sealing Arrangement:
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Metal-to-metal sealing
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Optional graphite / PTFE rings for enhanced sealing
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Bonnet Type:
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Bolted Bonnet / Pressure Seal (for high temp)
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Operation:
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Handwheel (manual)
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Gear Operated
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Pneumatic / Electric Actuator (optional)
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Standards & Specifications
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Design Standard: ASME B16.34 / BS / API
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Pressure Rating: Class 150 / 300 / 600 (higher on request)
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Testing: API 598
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End Connections:
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Flanged (ASME B16.5)
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Butt Weld (ASME B16.25)
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Key Features
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Excellent leak-tight shut-off
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Ideal for steam, condensate & high-pressure services
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Low maintenance and long operational life
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Resistant to thermal shock and pressure fluctuations
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Suitable for frequent operation
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Compact and robust design
Typical Applications
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Steam & Boiler Lines
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Power Plants
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Oil & Gas Processing
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Refineries & Petrochemical Plants
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Process & Utility Piping
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Chemical Industries
Why Choose a CS Piston Valve?
✔ Handles high pressure & temperature reliably
✔ Better sealing than conventional gate valves
✔ Minimal wear and consistent performance
✔ Proven solution for steam isolation applications
