Pressure Relief valves
Pressure Relief Valves are used to control pressure in a system. Pressure is relieved by forcing open a valve set to a specific limit which when met or exceeded allows the pressurized fluid to flow from an auxiliary passage out of the system. Once valve's reseating pressure is met the valve will close. Blowdown is quantified as a percentage of set pressures and refers to the reduction in pressure needed before the valve reseats.
Our pressure relief controls can manage pressure as a single purpose valve, or can be paired with a thermal control unit. Our pressure relief valves span from small precise units that are utilized in the aerospace industry all the way to simple freeze protection devices for residential and commerical building projects. The controls featured on this page are set in-house to your secific requirments. We offer several types of pressure relief valves please read below for more details on those specific types.
Poppet Pressure ReliefA poppet pressure relief valve is manufactured to be placed within a machined housing where the valve's seat is machined. The manifold contains ports and fittings mandated by your specific system while the poppet pressure relief valve regulates pressure according to your specifications.
Cartridge Pressure ReliefA cartridge pressure relief valve is special in the way that it contains the valve head and the valve seat. This valve does not require a manifold to function, typically this valve is inserted into an open ended pipe with an elbow where the valve blocks flow unless the pressure setting is exceeded. See diagram below for further clarification.
Custom Pressure Relief
Many customers need special sizes and configurations when dealing with pressure relief applications. We offer complete flexibility when working with our engineers. Some custom features include miniature sizes, low pressure settings, adjustable functions, and thermal bypass. Present an idea to our engineers and they will quickly develop a solution tailored to your needs.
Thermal Valves - Diverting & Mixing (Mouse Over Images To Animate)
| Valve: Poppet Pressur Relief Mouse over the image below to animate |
Valve: Custom Pressure Relief (1 of many) |
Valve: Cartridge Pressure Relief (Cage) Mouse over the image below to animate |
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| 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. |
Pressure Relief Valve Types & Function
We offer a wide range of valves that all fall under the general category of "Pressure Relief 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.
| Generalized Part # | Primary/Secondary Function | Port Diameter | Port # | Materials | Drawing |
| 0250-00-00 | Thermal Bypass / Safety Pressure Relief | 1/4" (6.35mm) | 3 | * Aluminum * Brass * Stainless Steel |
*.DWG |
| 0500-00-00 | Thermal Bypass / Safety Pressure Relief | 1/2" (12.7mm) | 3 | * Aluminum * Brass * Stainless Steel |
*.DWG |
| xxxx-xx-xx | Thermal Bypass / (N/A) | 1/2" (12.7mm) | 2 | * Aluminum * Brass * Stainless Steel |
*.DWG |