74- CM

API 682 PLAN 74

API 682 Plan 74 is used to regulate and monitor the barrier gas supply to a dual pressurized dry gas mechanical seal.

Inert buffer gas, typically Nitrogen is regulated by the Plan 74 Panel. This barrier gas is injected into the seal gland at a higher pressure than the seal chamber pressure which encourages gas migration into the process fluid. Upset conditions actuate switches or transmitters in the system alarming high / low flow or pressure situations which acts as an indicator of seal performance.

Standard Design Features Optional Design Features
  • Diaphragm Regulator
  • 4.5’’ Dial Pressure Gauge
  • Coalescing Filter
  • Armoured Tube Flow Meter w/ Switch
  • Check Valve Outlet
  • NPT Inlet / Outlet
  • 1/4’’ Tubing
  • Panel Mount
  • Coriolis Flow Transmitter
  • Variable Area Flow Indicators
  • Pressure Transmitter
  • Pressure Switch
  • Welded Rigid Pipe

*All materials used per ASME Section VIII Div. 1