Thermally activated valves

A thermally activated valve (thermal valve) is a self contained thermal control device that internally contains a wax motor and valve components. These valves are used to control fluids by sensing thermal and or pressure levels.

Port Options: Determined by the needs of the customer and typically ranging between 2 and 4 ports. Male and female ports are possible in a variety of standards, and custom options.

Request Quote

General Information

A thermally activated valve provides reliable, automated, and non electric solutions for control through thermal expansion. In real-time our thermal valves monitor temperature within applied systems and perform the tasks of port diverting, mixing, and or port modulation. Our thermal valves can also be paired with pressure regulating features if required. Some of our valves require a housing / manifold while others are self contained in a simple multi-port body. If the valve you need requires a manifold Rostra Vernatherm will ensure maximum performance through machining a manifold specifically for your needs; see more on manifolds here.

Thermal valve performance

Like our thermal actuators, Our patented high performance expansion material and willingness to blend you any temperature you want sets separates us from our competitors. With our actuators inside your valve you are in complete control over what temperature range the your valves perform at and to what degree. Every valve we design is for the customer and to the customer's specifications.

Customization

Please keep in mind that the products on this page reflect example valves that may not fit directly into your application and will require modifications; this is normal and is to be expected. We can accommodate any fastening method you need from standard threads (metric or imperial), to custom designs. Our 5 axis CNC machining ability enables us to machine exactly what you need without compromise.

Quotes & Engineering Assistance
If you are unsure of what you need simply let our team of engineers work with you to solve your problems. Prior to any commitment we can provide samples for you to evaluate and qualify, giving you the confidence needed to move forward with your project. Simply start the conversation by asking us some basic questions regarding your needs. Click HERE or the red button to the left.

 


Thermal Valves - Diverting & Mixing (Mouse Over Images To Animate)

Valve: 3 Port Thermal Diverter Valve
Mouse over the image below to animate
  Valve: 4 Port Thermal Bypass
Mouse over the image below to animate
  Valve: 3 Port Mixing
Mouse over the image below to animate
bypass valve   4 Port Thermal Bypass Valve   Three Port Mixing Valve
The three port diversion valve diverts flow through the valve between ports B & A, to B & C when a pre-set temperature level is met. Each customer has the freedom to choose a diversion temperature between 30F-300F (-1.1C - 148.9C).   The four port diversion valve offers an alternative method to the three port valve on the left. Cold flow will enter port A and exit out of port D without flowing through B. Hot flow will activate the wax motor inside causing the internal valve to close forcing fluid through the system cooler and back into port C of the valve.   The three port mixing valve has two inlets, and a single outlet for the mix temperature. This valve will shuttle between the hot and cold "inlet feeds" to appropriately mix your fluid to the desired temperature suited for your system.

Thermal Valve Types & Function

We offer a range of valves that all fall under the general category of "Thermal Valve" however each valve has unique functions and features. Please use the list below to better educate yourself on the options you have available to you.
Note: Drawing downloads will soon be released. If you require a dwg please contact us with your request and we will email it to you. Click Here To Contact

Identifier Valve Type Primary/Secondary Function Port Diameter Port # Materials Drawing
 A Diverter Thermal Bypass / Safety Pressure Relief 1/4" (6.35mm) 3 * Aluminum
* Brass
* Stainless Steel
*.DWG
 B Diverter Thermal Bypass / Safety Pressure Relief 1/2" (12.7mm) 3 * Aluminum
* Brass
* Stainless Steel
*.DWG
 C Thermal Relief Thermal Relief / Safety Pressure Relief (?) 1/4" (6.35mm) 2 * Aluminum
* Brass
* Stainless Steel
*.DWG
 D Thermal Relief Thermal Relief / Safety Pressure Relief (?) 1/2" (12.7mm) 2 * Aluminum
* Brass
* Stainless Steel
*.DWG
 E Thermal Relief Thermal Relief / Safety Pressure Relief (?) 1/4" (6.35mm) barb 2 *Aluminum
*Brass
*Stainless Steel
*.DWG
 F Purge Thermal Purge / (N/A) 3/4" Male Insert
1/4" Female Outlet
2 * Brass
* Stainless Steel
*.DWG
 G Purge Thermal Purge / (N/A) 3/4"(19.05mm) Male Insert 1 * Brass
* Stainless Steel
*.DWG
 H Solar Freeze Protection 35F Thermal Purge / (N/A) 1/2" (12.7mm) Male Insert 1 * ABS Plastic
* Brass
*Stainless Steel
*.DWG
 I Solar Freeze Protection 45F Thermal Purge / (N/A) 1/2" (12.7mm) Male Insert 1 * ABS Plastic
* Brass
*Stainless Steel
*.DWG
 J Solar Freeze Protection 35F Thermal Purge / Safety Pressure Relief 1/2"(12.7mm) Male Insert 1 * ABS Plastic
* Brass
*Stainless Steel
*.DWG
 K Solar Freeze Protection 45F Thermal Purge / Safety Pressur Relief 1/2" (12.7mm) Male Insert 1 * ABS Plastic
* Brass
*Stainless Steel
*.DWG
 L Thermal Bypass Thermal Bypass / Safety Pressure Relief Unknown ATM 4 *Aluminum
*Brass
*Stainless Steel
*.DWG
 M Thermal Mixing Thermal Mixing / Safety Pressure Relief (?) Unknown ATM 3 *Aluminum
*Brass
*Stainless Steel
*.DWG