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Seal Support Systems (API 682)

Lube Power has expanded its product line to include API 682 compliant seal support systems and pressure vessels for all types of seal applications. LPI is certified as an ASME pressure vessel code fabrication facility and can provide seal support reservoirs (i.e. P52, P53A) compliant with ASME VIII, Division 1, 2015. API 682 and LPI standard designs can be completed in a fraction of the time as the large mechanical seal manufacturers, at extremely cost competitive prices.

Plan 23

Product Picture

In Piping Plan 23 there is recirculation from a circulation device in the seal chamber through a cooler and back into the seal chamber. [API 682; G.12]. This plan is desirable for hot water services, such as boiler feed water, hydrocarbon and chemical services.

Standard Features

  • Shell and tube heat exchanger, non-code, CS shell, copper tubes
  • Temperature indicator with thermowell
  • CS valves
  • 316SS tubing and fittings

Options

  • API 682 compliant
  • ASME U stamp, ASME VIII, Div. 1 2015 for heat exchanger
  • SS valves and vessels

Plan 32

Product Picture

In Piping Plan 32, flush is injected into the seal chamber from an external source. The flushing product is brought from an external source to the seal. The external flush should be continuous and reliable even during nonstandard situations such as start-up or shutdown. [API 682; G.14]. This plan is used in combination with a close clearance throat bushing.

Standard Features

  • Y-stainer
  • Pressure indicator with instrument valve
  • Flow control valve
  • Sight flow indicator
  • CS valves
  • 316SS tubing and fittings

Options

  • All instruments types, ranges, and certifications
  • SS valves

Plan 52 / 53A

Product Picture

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].

Standard Features

•CS vessel material with 316SS internal cooling coil
•Weld pad level gauge
•Pressure gauge
•Pressure switch with instrument valve
•Level switch
•CS valves
•3 US gallons (11.3 liters) vessel volume

Options

•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
•Support stand
•Custom design

Plan 53B

In Piping Plan 53B, there is an external barrier fluid system pressurized by a bladder accumulator supplying clean liquid to the barrier fluid seal chamber. The accumulator and barrier liquid are maintained at a pressure greater than seal chamber pressure. [API 682; G.19]. Pressure is maintained in the system by a bladder-type accumulator. The bladder prevents contact between the pressurized gas and the barrier fluid.

Standard Features

  • Bladder accumulator, non-code, CS construction
  • Shell and tube heat exchanger, non-code, CS shell, copper tubes
  • Pressure indicator
  • Pressure switch with instrument valve
  • CS valves
  • 316SS tubing and fittings

Options

  • API 682 compliant
  • ASME U stamp, ASME VIII, Div. 1 2015 for vessels
  • SS valves and vessel
  • All instrument types, ranges, and certifications
  • Custom design

Plan 53C

In Piping Plan 53C, there is an external barrier fluid system pressurized by a piston accumulator supplying clean liquid to the barrier fluid seal chamber. The barrier liquid is maintained at a pressure greater than seal chamber pressure. The piston accumulator senses pressure from a reference source and creates a higher pressure through differential areas in the piston. [API 682; G.20]. By using this reference line from the seal chamber, the necessary differential pressure is maintained for an Arrangement 3 seal.

Standard Features

  • Piston acumulator, non-code, CS construction
  • Shell and tube heat exchanger, non-code, CS shell, copper tubes
  • Differential pressure transmitter with 3-valve manifold
  • CS valves
  • 316SS tubing and fittings

Options

  • API 682 compliant
  • ASME U stamp, ASME VIII, Div. 1 2015 for vessels
  • SS valves and vessel
  • All instrument types, ranges, and certifications

Plan 54

Product Picture

In Piping Plan 54, there is a pressurized external barrier fluid system supplying clean liquid to the barrier fluid seal chamber. [API 682; G.21] These types of seal systems are custom engineered to project specifications and other API standards based on application.

Standard Series

  • Flow capacities: 1 – 4 GPM / 0.2-0.9 M3/HR
  • Pressure capacities up to 10,000 PSI / 690 BAR
  • Heat rejection up to 30,000 BTU/HR / 8.8 KW

Custom Series

  • Flow capacities: 2,500 GPM / 568 M3/HR
  • Pressure capacities up to 10,000 PSI / 690 BAR
  • Fully customizable design

Plan 65

Product Picture

In Piping Plan 65A there is an atmospheric leakage collection and detection system for condensing leakage. Failure of the seal will be detected by an excessive flow rate into the leakage collection system. [API 682; G.25]. In Piping Plan 65B there is an atmospheric leakage collection and detection system for condensing leakage. Failure of the seal will be detected by a cumulative leakage into the system. [API 682; G.26]. These systems include a loop that by-passes the orifice to prevent high pressure on the atmospheric side of the seal allowing excessive leakage to be drained.

Standard Features

  • CS vessel material, 1 US gallon (3.8 liters)
  • Level switch
  • CS valves
  • SS tubing and fittings

Options

  • API 682 compliant
  • ASME U or UM stamp, ASME VIII, Div. 1 2015
  • SS valves and vessel
  • All instrument types, ranges, and certifications

Plan 72 / 74

Product Picture

In Piping Plan 72 there is externally supplied buffer gas for Arrangement 2 seals. Buffer gas is maintained at a pressure less than seal chamber pressure. In normal operation, the buffer gas pressure should not exceed 0.07 MPa (0.7 bar) (10 psi). [API 682; G.30]. This plan can be used in combination with a Plan 75 or Plan 76 where the buffer gas sweeps seal leakage away from the outer seal to a collection reservoir. Leakage can be diluted so that the missions from the seal are reduced.

In Piping Plan 74 there is externally supplied barrier gas for Arrangement 3 seals. Barrier gas is maintained at a pressure greater than seal chamber pressure. [API 682; G.31] With this type of system most of the barrier gas leaks into the atmosphere.

Standard Features

  • SS panel with 316SS tubing and fittings
  • Pressure gauge
  • Pressure switch with instrument valve
  • Pressure control valve
  • Coalescing filter
  • CS valves

Options

  • API 682 compliant
  • SS valves
  • All instrument types, ranges, and certifications
  • Special varrier fluid compatibility
  • Support stand
  • Custom design

Plan 75

Product Picture

In Piping Plan 75 there is a containment seal chamber leakage collection system for condensing or mixed phase leakage on Arrangement 2 seals. This plan is used when pumped fluid condenses at ambient temperatures. [API 682; G.32] This plan is typically used with a Plan 72 where vapor passes through the collection system and liquid is contained to monitor the seal leakage rate.

Plan 76

Product Picture

In Piping Plan 76 there is a containment seal chamber drain for noncondensing leakage on Arrangement 2 seals. This plan is used if the pumped fluid does not condense at ambient temperatures. This system is supplied by the vendor. [API 682; G.33] This plan is typically used with a Plan 72 where vapor pressure is tracked in the containment reservoir. Pressures to the vapor collection system that exceed the seal chamber pressure would indicate excessive leakage. Standard features include a containment reservoir, pressure instrumentation, valves, tubing.