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
Body & Bonnet:
Carbon Steel (ASTM A216 WCB / A105)
Piston:
Alloy Steel / Stainless Steel (hardened & polished)
Cylinder / Sleeve:
Alloy Steel or SS with hard-faced surface
Stem:
Stainless Steel / Alloy Steel
Sealing Arrangement:
Metal-to-metal sealing
Optional graphite / PTFE rings for enhanced sealing
Bonnet Type:
Bolted Bonnet / Pressure Seal (for high temp)
Operation:
Handwheel (manual)
Gear Operated
Pneumatic / Electric Actuator (optional)
Standards & Specifications
Design Standard: ASME B16.34 / BS / API
Pressure Rating: Class 150 / 300 / 600 (higher on request)
Testing: API 598
End Connections:
Flanged (ASME B16.5)
Butt Weld (ASME B16.25)
Key Features
Excellent leak-tight shut-off
Ideal for steam, condensate & high-pressure services
Low maintenance and long operational life
Resistant to thermal shock and pressure fluctuations
Suitable for frequent operation
Compact and robust design
Typical Applications
Steam & Boiler Lines
Power Plants
Oil & Gas Processing
Refineries & Petrochemical Plants
Process & Utility Piping
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
