Self-operated pressure regulating valve

Self-operated control valve is a kind of intelligent valve that does not need external power and automatically adjusts the flow and pressure through the medium's own pressure, which is widely used in a variety of working environments such as heating, HVAC, water supply and drainage, chemical industry and petroleum, etc. The valve is suitable for water, steam, air and some corrosive media. The valve is suitable for water, steam, air and some corrosive media, with good sealing performance and corrosion resistance. Self-operated control valves rely on the media pressure difference to automatically adjust the spool position, to achieve accurate flow and pressure control, without power or gas source, easy to operate and energy saving and environmental protection. Advantages of the product include simple structure, easy maintenance, sensitive response, stable regulation, suitable for remote or unattended places. Its function not only covers the automatic adjustment of flow, but also effectively protects the pressure of the pipeline network and ensures the safe operation of the system. Due to its high efficiency, energy-saving and intelligent features, the self-operated control valve has become an important equipment for the automated adjustment of modern industrial and municipal pipeline networks.

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products

Self-operated pressure regulating valve

Model: ZZYP

Subtitle：Self-pressure reducing valve

Self-acting pressure regulating valves are a reliable and cost-effective solution for precise pressure control of piping without the need for an external power source. It utilizes the energy of the process fluid to automatically regulate to maintain a set pressure level, making it ideal for steam systems, gas distribution and liquid process line applications. Its simple design...

Tags:pressure regulating valve

Classification:Self-operated control valves

Working conditions:chemical plant, power plants, petrochemical industry

Product Overview

Applicable working conditions

Steam system: depressurization of steam mains and boiler water supply lines.

Gas distribution: pressure control for natural gas pipelines and LPG systems.

Water treatment: pump outlet pressure regulation and tank level control.

Chemical treatment: precise pressure management for corrosive media.

Main characteristics

Self-acting operating mechanism
No external power is required: operation utilizes the energy of the process fluid.
Direct-acting design: simple and reliable, with a minimum of moving parts.
Set pressure range: 0.1-6.0 MPa (15-870 psi), spring adjustable.

Valve Design
Valve body types: Spherical, angular or Y-shaped bodies for different flow conditions.
High sealing performance: ANSI Class IV (standard) / Class VI (optional).
Pressure range: For inlet pressures up to 10 MPa (1450 psi).

Flow Rate Characteristics
Valve insert options: linear or equal percentage flow characteristics.
Flow coefficient (Cv): 2.5-120 (DN15-DN100).
Customizable flow curves: tailored to specific process requirements.

Materials and Durability
Valve body materials: carbon steel (WCB), 316L stainless steel (CF8M), duplex stainless steel (UNS S32205).
Valve inner member material: Stellite 6 alloy, 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 filters.

Product Advantages

Energy saving: No external power supply is required, reducing operating costs.

Precision Control: Maintains set pressure within an accuracy of ±5%.

Low Maintenance: Simple design with minimal moving parts.

Versatile: For vapor, gas and liquid applications.

Comparison of similar products

specificities	Self-operated control valves	Externally actuated control valves
power source	Process Fluid Energy	External power (pneumatic or electric)
accurate	±5% of set pressure	±1% of set pressure
safeguard	Low (fewer components)	High (complexity of pilot system)
(manufacturing, production etc) costs	Lower initial and operating costs	Higher initial and operating costs

Selection Guide

High differential pressure: Select multi-stage anti-cavitation valve internals.

Corrosive media: Choose 316L bodies and Hastelloy internals.

High Cycle: Rotary seat design with over 50,000 cycles.

Cryogenic applications: Extended bonnet for LNG applications.

Medium of use

Water/hot water

working condition

chemical plant, power plants, petrochemical industry

summarize

Self-acting pressure regulating valves are a reliable and cost-effective solution for precise pressure control in a variety of industrial applications. Its simple design, low maintenance requirements and energy efficiency make it ideal for steam, gas and liquid systems. With optional customization features and an extended 5-year warranty, it ensures long-term efficient operation and cost savings.

Product Parameters

Nominal diameter	DN15-DN100 (½"-4")
Nominal pressure	PN16-PN100 (Class 150-600)
Applicable temperature	-40°C to 450°C (depending on seals)
leakage rate	ANSI Class IV (standard) / Class VI (optional)
Pressure setting range	0.1-6.0 MPa (15-870 psi)
connection method	Flange (RF/RTJ)
Valve Material	WCB, 316L SS (CF8M), duplex stainless steel (UNS S32205)
sealing material	Graphite, PTFE, metal bellows