This corrosion-resistant valve is used as a bypass valve and is also a used for back pressure control applications such as maintaining constant pump discharge pressures, limiting pump overpressure and bypassing excessive pressures from various types of process equipment, and wherever a constant pressure must be maintained in a process or piping system. This back pressure valve can be used for corrosive liquids when the proper materials are selected and applied and are compatible with the temperature limit of the valve materials chosen. Make sure the fluids chosen are not only chemically compatible with the valve, but also will not cause corrosive buildup, crystallization or solidification in the close clearances between the piston and body bore, which could keep the poppet from opening freely. Standard Soft seated valves meet ANSI Class VI seat leakage standards. (Bubble tight).

This particular model can be utilized where outlet pressure is present. Where the outlet pressures in the discharge piping are elevated and stay elevated, re-seating of the valve will not be affected. The valve will re-seat itself to its original set pressure once the outlet pressure is reduced to its original value when the valve was set. Balanced piston models compensate for outlet pressures.

Although the valve is typically installed in the position illustrated, it can operate in any position or orientation, vertical horizontal, etc as long as it can be easily accessed for making adjustments.

Do not oversize a back pressure valve simply because the piping is already oversized, unless it has a reduced trim option designed into it. Because very often this will result in "valve chatter" when the capacity for which the valve is designed for is too low. This is because an oversized valve seat for a very low flow rate barely opens to satisfy an overpressure condition, only to close again very quickly. This repeated action usually at very low flows, results in valve chatter and can eventually result in severe valve seat damage. This can often be corrected by replacing the piston with a reduced trim version to match the lower flow conditions that were not anticipated. Special custom trim can be designed to tolerate very low flows when these conditions are specified and such trim requested. This must be quoted on request.

Where an overpressure condition needs to be relieved quickly, such as for emergency relief, use the closely related model RVC05-P. Both models have the same maximum relieving capacity, except the BPS05-P is designed to control the relief pressure more gradually at the lower capacities resulting in less of a chance for pressure spikes and possible valve chatter at low capacities. This makes the BPS05-P model more suitable for pump bypass service or for back pressure control than the RVC05-P.

For an additional charge, valves can be ordered with material certs and with a certified hydro-test certificate and other tests to meet special documentation and acceptance requirements.

Standard Soft seated valves meet ANSI Class VI seat leakage standards. (Bubble tight).