Self-Actuated Pressure Regulating Valve

Category: Self-Operated Regulating Valve

Summary:The self-operated pressure regulating valve requires no external power source; instead, it uses the energy inherent in the controlled medium itself as its driving force. By introducing this internal energy into the actuator, the valve precisely controls the position of the valve core, thereby adjusting the pressure difference and flow rate across the valve and maintaining stable pressure either upstream (before the valve) or downstream (after the valve). This self-operated pressure regulating valve consists of key components such as the valve body, valve core, valve seat, valve stem, diaphragm cover, and sensing element. It features finely segmented pressure ranges that overlap with each other, delivering high precision in pressure regulation. Primarily designed for controlling pressure reduction, pressure relief, and pressure stabilization in media like gases, liquids, and steam, these valves are widely used across various industrial applications—including petroleum, chemical processing, power generation, metallurgy, food production, and light manufacturing.

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Product Details

Overview

　　The self-operated pressure regulating valve requires no external power source; instead, it uses the energy inherent in the controlled medium itself as its driving force. By introducing this internal energy into the actuator, the valve precisely controls the position of the valve core, adjusting the pressure differential and flow rate across the valve to maintain stable pressure either upstream (before the valve) or downstream (after the valve). This self-operated pressure regulating valve consists of key components such as the valve body, valve core, valve seat, valve stem, diaphragm cover, and sensing element. It features finely segmented pressure ranges that overlap with each other, delivering exceptional control accuracy. Primarily designed for applications involving gases, liquids, and steam, this valve effectively manages tasks like pressure reduction, pressure relief, and pressure stabilization. As a result, it is widely used across various industrial equipment types, including those found in petroleum, chemical processing, power generation, metallurgy, food production, and light manufacturing industries.

Exterior Drawing

Principles of Stress Regulation

Self-Acting Pressure Regulating Valve

　　Self-operated pressure regulating valves are classified into pressure-closing type and pressure-opening type.

Features of the Compression-Type Pressure Regulating Valve

　　This valve takes pressure from the downstream side; initially, the valve core is in the open position. As the downstream pressure rises, the valve core gradually reduces its opening, thereby regulating both the downstream pressure and flow rate to maintain the downstream pressure steadily at a predetermined value—achieving the purpose of pressure reduction and stabilization. This valve is widely used for automatic control applications involving pressure reduction and stabilization in gaseous, liquid, and steam media.

Main Technical Parameters

　　Nominal diameter: DN15 to DN300 mm

　　Nominal pressure: PN1.6–6.4 MPa, ANSI 125–400

　　Valve body material: Carbon steel, stainless steel Valve internal parts material: Stainless steel

　　Flow characteristics: Quick-opening

　　Flow coefficient: Cv 8–1750

　　Leakage Level: (Hard) Class IV, (Soft) Class VI Pressure Regulation Range: 15–2500 (kPa):

　　Connection method: Flanged

　　Operating temperature: -29°C to +350°C

Features of the Compression-Type Pressure Regulating Valve

　　This valve takes pressure upstream of the valve itself. Initially, the valve core is in the closed position. As the upstream pressure rises, the valve core gradually opens wider, adjusting both the upstream pressure and flow rate to stabilize the upstream pressure at a predetermined value, thereby achieving pressure regulation. It is widely used in automatic control systems for pressure reduction, stabilization, or relief and pressure stabilization in gaseous, liquid, and steam media applications.

Main Technical Parameters

　　Nominal diameter: DN15 to DN300 mm

　　Nominal pressure: PN1.6–6.4 MPa, ANSI 125–400

　　Valve internal component material: Stainless steel

　　Valve body materials: Carbon steel, stainless steel

　　Flow characteristics: Quick-opening

　　Flow coefficient: Cv 8–1750

　　Leakage Level: (Hard) Grade IV, (Soft) Grade VI

　　Pressure regulation range: 15–2500 (kPa)

　　Connection method: Flanged

　　Operating temperature: -29°C to +350°C

Keywords: Self-Actuated Pressure Regulating Valve