Product Overview

ZZWP Series self-operated temperature regulators use the thermal expansion of an incompressible, temperature-sensitive liquid to achieve automatic temperature control without an auxiliary actuator. As the sensor liquid expands or contracts with temperature, it directly drives the valve spool to regulate the flow of thermal media — keeping the controlled medium within the set temperature range.

Working Principle

When the controlled medium temperature rises above the set value, the temperature-sensitive liquid expands and pushes the spool to close the valve, reducing thermal media flow. When the temperature falls below the set value, the liquid contracts and a reset spring pushes the spool open, increasing flow. This cycle repeats continuously, keeping the medium temperature within the allowable range.

Key Features

• Small size, lightweight, and easy to install
• Accurate and reliable, with a long service life
• Easy to adjust the temperature setting
• No auxiliary power required for operation

Available Configurations

• Heating temperature control valve
• Cooling temperature control valve
• Three-way mixing type temperature control valve
• Three-way dividing type temperature control valve

Highlight Specifications

• Size range: DN15–DN250
• Kv value range across the series: approximately 3.4–350 m³/h
• Nominal pressure: PN1.6 and PN2.5 MPa
• Operating temperature range: -20 to 300°C, with set-point deviation of ±2°C
• Body materials: cast iron, cast steel, or stainless steel; sensor material: brass or nickel brass

Full dimensional drawings, Kv tables by size, and flange standards (GB/T9113, JB/T79, HG20594, or others) are available on our website — visit cncontrolvalve.com for complete details.

Applications

• Domestic hot water and heating/air-conditioning systems
• Petrochemical industry
• Power plants
• Textile mills, rubber, and food industries

Manufacturing Capability

THINKTANK is a China-based manufacturer of control valves, safety valves, breather valves, and self-operated regulators, providing engineering-focused valve solutions for long-term industrial projects, OEM integration, and mission-critical applications worldwide.

• Certified to ISO9001:2015, ISO14001:2015, PED, SIL, and CE standards
• Valve sizing and selection carried out per API, ISO, ASME, and project-specific specifications
• 3D modeling and flow simulation used to validate performance under real system conditions
• Full engineering documentation available to support OEM branding and project approval processes

Get in Touch

Contact THINKTANK today to discuss sizing and configuration for your self-operated temperature regulator application, or visit our website for full technical datasheets.