Thermostatic Technology

We are a professional manufacturer of wax thermostatic element (wax actuator) with many years of experience. Our products are used in many industries, including sanitary, HVAC, medical,ship,and military. In addition, we also have developed various high quality thermal actuators and thermostatic valves.

Used and Trusted by

Our Products

Our products include wax thermostatic element, thermal actuator and thermostatic valve. We have a great market share in China, especially wax thermostatic element and thermal actuator.


Available in a variety of sizes and configurations, our wax thermostatic elements all function through thermal expansion. it can be utilized in limitless applications from miniature to heavy duty. Every element we design is for the customer specifications.


The thermostatic valve ensures the effluent temperature’s constancy and is not affected by changes of water temperature, flow rate and water pressure. It solves the problem of sudden cold and heat of water temperature while bathing. 


SMLG provides a cost effective solution for your electric underfloor heating system. All components are working seamlessly and easy to be installed. Our components follow the latest technology and saving more energy than competitors.


Available in a variety of designs and technologies. The home’s heating and cooling can be controlled easily with your phone. Heating and cooling is at the convenience of your fingertips.

Products List


Wax Thermostatic Element

Wax expansion material sealed in the shell expanded subjected to temperature induction, and rubber seal in the thermostatic element push the push rod to move under the expansion pressure. Heat is converted into mechanical energy, and the thermostatic element push rod produces an upward displacement, and this displacement is used for the realization of automatic control of various functions. The return of the push rod is done by a load after the setting temperature drops. A linear wax expansion executive part converts heat into mechanical displacement by phase transition behavior of wax. The product is small in volume, fast in response speed, almost infinitely repeated in heat regulation of rising and cooling displacement. Its expansion rate is between 1% – 25% with the temperature range from 30 to 300 Fahrenheit 

Thermostatic Valve

The thermostatic valve ensures the effluent temperature’s constancy and is not affected by changes of water temperature, flow rate and water pressure. It solves the problem of sudden cold and heat of water temperature while bathing. The mixing valve will automatically turn off the hot water in a few seconds when meeting a sudden cold water interruption and played the role of safety protection.

Mini TMV

Return Valve

4-way Thermostatic Mixing Valve

Pressure Limiting Valve

T&P Valve

Dynamic Balancing Valve


Solar Thermostatic Connection Kit


Mini TMV

4-way Thermostatic Mixing Valve

T&P Valve



Return Valve

Pressure Limiting Valve

Dynamic Balancing Valve

Solar Thermostatic Connection Kit

Underfloor Heating Component

Energy efficient underfloor heating components to suit any type of property. The components are carefully developed through our intensive research and development. On average, our integrated components save 30% more energy than other products in the market. Additionally, the components are made from excellent quality materials for long term usage.





Temperature Centre Controller

Smart Thermostat

More people are seeking home automation, and the smart thermostat is one of the vital device. As it is responsible in controlling the comfort of the rooms. The smart thermostat has wifi connectivity, which can be remotely accessed by smartphones. It also has a scheduling program to save energy in the most efficient way.

Wifi Thermostat For Heating & Cooling Thermostat




About Us

Shanghai SMLG Thermostatic Technology Co., Ltd. was established in 2010 as a professional manufacturer of wax thermostatic element. 

The products are applied in automobile, military, shipping, plumbing, air conditioning and other industries. We are supporting domestic and foreign famous enterprises at present. Our company claims over 50% market share in domestic heating and ground heating actuator & wax thermostatic element market with a complete set of all – automatic advanced production equipments for wax thermostatic element.


Our company has an International Standard of Quality Assurance System.

We passed ISO 9001, QS 9000 system certifications and European ACSWRAS, CE, ROHS, REACH product certifications. With the help of the industry’s most advanced and reliable inspection equipments ensure the production of high-quality products.

Contact Us

Please contact us for more complete information about our products and services...

86 1895 737 2556


No.84 Jinwen Road, Pudong New Area, Shanghai, China

© 2021, All Rights Reserved

This website is protected by U.S. and International copyright laws. Reproduction and distribution of the website without written permission of the sponsor is prohibited.