Self-operated pressure regulating valve

Product Overview

The Self-operated Pressure Regulating Valve is a reliable and cost-effective solution for precise pressure control in pipelines without the need for external power sources. Utilizing the energy of the process fluid, it automatically adjusts to maintain set pressure levels, making it ideal for applications in steam systems, gas distribution, and liquid process lines. Its simple design ensures low maintenance and long-term reliability in demanding industrial environments.

Applications

Steam Systems: Pressure reduction in steam mains and boiler feed lines.
Gas Distribution: Pressure control in natural gas pipelines and LPG systems.
Water Treatment: Pump discharge pressure regulation and tank level control.
Chemical Processing: Precise pressure management for corrosive media.

Key Features

Self-Operating Mechanism

• No External Power: Utilizes process fluid energy for operation.
• Direct-Acting Design: Simple and reliable, with minimal moving parts.
• Set Pressure Range: 0.1–6.0 MPa (15–870 psi), adjustable via spring.

Valve Design

• Body Types: Globe, angle, or Y-pattern for different flow conditions.
• High Sealing Performance: ANSI Class IV (standard) / Class VI (optional).
• Pressure Range: Suitable for inlet pressures up to 10 MPa (1450 psi).

Flow Characteristics

• Trim Options: Linear or equal percentage flow characteristics.
• Flow Coefficient (Cv): 2.5–120 (DN15–DN100).
• Customizable Flow Curves: Tailored to specific process requirements.

Materials & Durability

• Body Materials: Carbon steel (WCB), 316L Stainless Steel (CF8M), Duplex (UNS S32205).
• Trim Materials: Stellite 6, Tungsten carbide, or ceramic coating.
• Seals: Graphite, PTFE, or metal bellows (-40°C to 450°C).

Compatibility

• Process Fluids: Steam, gas, water, and non-corrosive liquids.
• Accessories: Pressure gauges, bypass valves, and strainers.

Operational Advantages

• Energy Efficiency: No external power required, reducing operational costs.
• Precision Control: Maintains set pressure within ±5% accuracy.
• Low Maintenance: Simple design with minimal moving parts.
• Versatility: Suitable for steam, gas, and liquid applications.

Comparison with Pilot-Operated Valves

Selection Guidelines

High ΔP: Opt for multi-stage anti-cavitation trim.

Corrosive Media: Choose 316L body with Hastelloy trim.

High Cycling: Rotary seat design for 50,000+ cycles.

Cryogenic Service: Extended bonnet for LNG applications.