compressor safety valve leaking pricelist

Field Air Compressors offers a standard range of safety valves suitable for a variety of compressed air applications. There are options of preset and adjustable units available, with sizes ranging from 1/4″ to 1″ kept in stock.

The relief capacity for safety valves depends on the relief discharge area the compressibility factor of the actual gas the temperature of the gas the geometry of the safety valve. A safety relief valve must be capable of relieving the capacity of the connected compressor(s) at operating pressure. Note that the relief pressure can not be set higher than the maximum rated working pressure of any equipment in the system. If the operating pressure is right below the relief pressure of the valve the valve may start leaking.

A “rule of thumb” is to set the relief pressure 10% above the working pressure of the system. The relief valve is designed or set to open at a predetermined set pressure to protect pressure vessels and other equipment from being subjected to pressures that exceed their design limits.

Brand new, certified 1/8" Male NPT Threaded 70 PSI air compressor / tank pressure safety relief valve. Also known as a "Pop Off" or "Blow Off" valve. This relief valve is manufactured in the United States and is stamped with "UV" & "NB" symbols. The relief pressure of this valve is set at 70 PSI and is accurate within + or - 3% of the set pressure.

In summary, the fusible plug is a reliable safety device whose primary purpose is to protect a refrigeration system against explosion or fire. When installed in accordance with such authority as the ASHRAE Handbook, it will be leak proof during normal operation and discharge without failure within 20°F of the stamped temperature.

To determine which RELIEFMASTER® Change-Over manifold will work with a relief valve, all you need to do is match the inlet thread of the relief valve to the threads of the manifold.

Install the manifold where you would normally install a relief valve. Install two relief valves in the manifold. Back Seat (Counterclockwise stem rotation) until the stem stops and apply the proper torque found in our catalog. This will expose the relief valve, which is farthest away from the cap of the manifold, to the system pressure. This relief valve will protect the system from over pressure until it needs to be replaced. To replace the relief valve, Front seat the stem to the proper torque found in our catalog (clockwise rotation until it stops) and remove the relief valve which is farthest away from the cap of the manifold. Once the new relief valve is installed, Back Seat (Counterclockwise) until the stem stops and apply the proper torque. It is also recommended to replace the other relief valve at this time. This can be done once the stem is back seated and torqued properly.

Yes, the direction the valves are mounted is irrelevant. It is important to make sure that after the valve is mounted, debris is kept from collecting in the valve.

Since Relief Valves are highly regulated safety devices, we do not repair relief valves or supply components to the customer for repair. If the valve is in need of repair, it must be replaced with a new valve.

There are just too many environmental variables to give a definitive answer to this question. Mueller relief valves are used on numerous makes and models of refrigeration systems of all ages and states of repair, various refrigerants and located anywhere from rooftops in the Midwest or Alaska to Navy ships at sea.

By Code, as a manufacturer of Relief Valves, Mueller Refrigeration is only responsible for designing and providing relief valves to the strict standards outlined by ASME Section VIII Division 1. It is up to the user to consult with ASHRAE 15 and their local code for proper installation and use of a Safety Relief Valve.

A relief valve is your last line of defense in a run away, overpressure situation caused by something catastrophic such as a fire. The closer the pressure gets to the set point of a relief valve, there is potential for leaks and possible discharge. A relief valve needs to be sized at least 25% higher than the maximum system pressure for this reason.

All Relief Valves must be replaced after they pop. When a Relief Valve pops, debris can get trapped in the seal and the spring can either rotate or take what is called a “set” which can potentially relax the spring and lower the set pressure. Because of this, relief valves must be replaced in order to function properly.

To determine which RELIEFMASTER® Change-Over manifold will work with a relief valve, all you need to do is match the inlet thread of the relief valve to the threads of the manifold.