Self-operated temperature control 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 temperature control valve

Model: ZZWP

Subtitle：Thermostatic Control Valve, Direct Acting Temperature Valve

Self-acting thermostatic valves are a reliable and energy-efficient solution for precise temperature control in heating, cooling and process systems. It utilizes the thermal energy of the process fluid and automatically adjusts to maintain a set temperature level without the need for an external power source. Its robust design and self-actuating mechanism make it an ideal choice for HVAC systems, industrial...

Tags:Temperature regulating valves

Classification:Self-operated control valves

Working conditions:drugs manufacturing factory, chemical plant, construction work, food factory

Product Overview

Self-acting thermostatic valves are a reliable and energy-efficient solution for precise temperature control in heating, cooling and process systems. It utilizes the thermal energy of the process fluid and automatically adjusts to maintain a set temperature level without the need for an external power source. Its robust design and self-acting mechanism make it ideal for HVAC systems, industrial processes and energy management applications.

Applicable working conditions

HVAC systems: temperature control of heating and cooling circuits.

Industrial processes: thermal management of chemical reactors and heat exchangers.

Energy management: district heating and cooling systems.

Food & Beverage: Temperature regulation during pasteurization and sterilization.

Main characteristics

Self-acting operating mechanism
No external power is required: operation utilizes the thermal energy of the process fluid.
Direct-acting design: simple and reliable with very few moving parts.
Setting temperature range: 20°C to 150°C (68°F to 302°F), adjustable with the adjustment knob.

Valve Design
Valve body types: Spherical, angle or Y-shaped for different flow conditions.
High sealing performance: ANSI Class IV (standard) / Class VI (optional).
Temperature range: For process temperatures up to 200°C (392°F).

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 insert material: Stellite alloy 6, tungsten carbide, or ceramic coating.
Seals: graphite, PTFE or metal bellows (-40°C to 450°C).

compatibility
Process fluids: water, steam, heat transfer oil and non-corrosive liquids.
Accessories: temperature sensor, bypass valve and filter.

Product Advantages

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

Precise control: Setting temperature accuracy is maintained within ±2°C.

Low Maintenance: Simple design with minimal moving parts.

Versatile: Suitable for water, steam and heat transfer oil applications.

Comparison with motorized control valves

specificities	Self-operated control valves	Motorized Control Valve
power source	Process Fluid Heat	external power
accurate	Setting temperature ±2°C	Setting temperature ±0.5°C
safeguard	Low (fewer components)	High (complex control system)
(manufacturing, production etc) costs	Lower initial and operating costs	Higher initial and operating costs

Selection Guide

High temperatures: Choose the metal bellows seal for temperatures up to 450°C.

Corrosive media: Choose 316L body and Hastelloy internals.

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

Steam applications: Selection of steam rated materials and internals.

Medium of use

Water/hot water

working condition

drugs manufacturing factory, chemical plant, construction work, food factory

summarize

Self-acting thermostatic valves are a reliable and cost-effective solution for precise temperature control in a variety of industrial applications. Its simple design, low maintenance requirements and energy efficiency make it ideal for heating, ventilation and air conditioning (HVAC), industrial processes and energy management 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 200°C (depending on seal)
Flow coefficient (Cv)	2.5-120
leakage rate	ANSI Class IV (standard) / Class VI (optional)
Setting temperature range	20°C to 150°C (68°F to 302°F)
connection method	Flange (RF/RTJ), Socket Weld (SW)
Valve Material	WCB, 316L SS (CF8M), duplex stainless steel (UNS S32205)
sealing material	Graphite, PTFE, metal bellows