In Piping Plan 52 there is an external reservoir providing buffer liquid for the outer seal of an Arrangement 2 seal. The buffer liquid shall be maintained at a pressure less than seal chamber pressure and less than 0.28 MPa (2.8 bar) (40 psi). [API 682; G.17]. This plan is typically used in services where process leakage to atmosphere needs to be minimized and contained.
In Piping Plan 53A there is a pressurized external barrier fluid reservoir supplying clean fluid to the barrier fluid seal chamber. The barrier liquid is maintained at a pressure greater than seal chamber pressure. [API 682; G.18].
•CS vessel material with 316SS internal cooling coil
•Weld pad level gauge
•Pressure switch with instrument valve
•3 US gallons (11.3 liters) vessel volume
•API 682 compliant
•ASME U or UM stamp, ASME VIII, Div. 1 2015
•SS valves and vessel
•All instrument types, ranges and certifications
•5 US gallons (18.9 liters) or other vessel volume