Piston Valves

Detailed Information About Piston Valves

Piston valves are high-temperature and pressure-resistant industrial valves that ensure precise flow control through the combined operation of a piston and sealing rings. This design provides long-lasting performance in steam, high-temperature liquids, and aggressive process fluids.

Operating Principle

The piston, moving up and down within the valve body, controls the fluid flow between two sealing rings. By utilizing a piston instead of the traditional disc found in globe valves, this system offers significantly higher durability and leak-tightness. Since the piston design enhances wear resistance, maintenance costs are remarkably low.

Main Advantages

• • Resistant to high temperature and pressure.
• • Maximum safety with a dual-ring sealing system.
• • Precise control in flow adjustment, isolation, and throttling.
• • Low risk of cavitation.
• • Long maintenance intervals – low operating costs.
• • One of the most ideal valve types for steam applications.

Material Specifications

• • Body: Cast iron, ductile iron, carbon steel, stainless steel
• • Piston: Stainless steel
• • Sealing Rings: Graphite / PTFE / Composite
• • Bonnet and Stem: Stainless steel
• • Gaskets: Graphite or metal-reinforced

Application Areas

• • Steam lines
• • Hot water and superheated water systems
• • Thermal oil circuits
• • Industrial process lines
• • Food, chemical, and petrochemical plants
• • Power plants
• • Pressurized lines and heat transfer systems

Performance Characteristics

Piston valves are generally manufactured with:
• Sizes from DN15 to DN200
• Pressure classes of PN16 – PN40
• Temperatures ranging from -10°C to +400°C
• Designs suitable for throttling, isolation, and regulation.