Aqua Environment 504-H 504 Series Relief Valve 0-6500 PSI Relief Pressure Anodized Aluminum Body Extended Set Pressure

The model 504 is an economical, small, high pressure relief valve having excellent set pressure control over a large pressure range to 6000 PSI. It stays bubble tight to within a few PSI of set pressure and reseats bubble tight even after many vent cycles. Safety wire holes are provided for optional locking of set pressure adjustment.

Features:

• Relief valve
• 0-6000 PSI relief pressure
• Extended set pressure (6500 psi)

Typical Applications:

• Discharge and interstage reliefs on small high pressure compressors
• Reliefs on charging lines, regulators, and manifolds
• Hydraulic system and accumulator reliefs
• Many other safety relief valve applications

Installation

Use pipe thread sealant Teflon tape on inlet and outlet threads. Avoid over torquing pipe thread. Normal torque applied with a 6 or 8 inch long wrench is ample. Use ample Teflon tape - 3 or 4 turns, not 1 or 2 turns. It is important to maintain piping internals free of particulates such as metal chips, dirt, weld slag, etc. If present these will tend to lodge in the relief valve when it opens causing damage to the seat and leakage. Since it is difficult to keep piping completely clean during assembly it is advisable to blow high velocity air through the system and out the relief valve port just prior to installing it. This can normally clean the system of particulates. A high pressure air tank can provide a strong flow for this cleaning operation. Suitable ear and eye protection should be used when flowing high pressure air. It is NOT advisable to install any type of filter before the relief valve. A filter could become clogged disabling the safety function of the relief.

The relief can be either set prior to installing in the system or after. Set the relief above set pressure using the adjusting screw. Bring system pressure up to desired relief valve pressure then back off the adjusting screw until the relief valve vents. Use the locking nut to lock the position of the set screw. Cycle pressure once or twice to insure the relief opens at the desired pressure. Safety wire holes are provided in the body and adjusting screw. The regulator is NOT shipped oxygen clean and should NOT be used for oxygen service as provided.

Maintenance and repair

Routine maintenance is generally not required. As mentioned above, the relief is sensitive to solid particles flowing through it. As with any relief valve, these particulates tend to lodge on the sealing surfaces or damage the sealing surfaces as they pass through. The result is leakage after the valve reseats. In the event of leakage, the valve can be repaired.

For more information, please see Data Sheet