Project Description


  • CGT3111
  • CGT3111
  • CGT3111
Item No. Description
1 Buffer/barrier fluid IN (G1/2″)
2 Buffer/Barrier fluid OUT (G1/2″)
3 Cooling water IN (G1/2″)
4 Cooling water OUT (G1/2″)
5 Filling connection with plug (G1/2″)
6 Pressure gas connection (G1/2″)
7 Connection for level switch or level indicator (G2″)
8 Connection for hand refill pump (G1/2″)
9 Universal connection (G1/2″) for safety valve, flare,etc
10 Bracket for hand refill pump
11 Sight-glass
  • Available with or without cooling coil
  • Optimum draining and venting is
    achieved because of the design of
    cooling water connections at top (OUT)
    and bottom (IN)
  • Sockets are designed with recessed
    gasket to avoid contamination of the
    circuit by thread sealant
  • Construction of the BFS 2000 is
    designed for demanding operating
    conditions up to 30 bar / 200°C
  • Design allows for varied applications
    due to construction in stainless steel
    with borosilicate sight-glasses
  • The BFS system performs all the basic functions of a buffer/barrier system for the operation of double seals:
    • To pressurize the buffer chamber
    • Leakage compensation
    • Buffer/barrier fluid is circulated by
      thermosiphon effect or external circulation system
    • To cool the seal
    • To selectively absorb product leakage and
      prevent dry running (tandem arrangement)
    • Use compressed air or nitrogen for pressurization
  • The BFS vessel must always be installed higher
    than the mechanical seal. The buffer/barrier fluid
    flows via the return pipe into the vessel and is
    cooled. The exchange of fluid takes place by the
    thermosiphon principle or by forced circulation,
    e.g. with a pumping screw. Connection pipes to
    the seal should be designed with as little
    resistance as possible.
  • Measuring unit
  • Level Switch
  • From PCV, we recommend using a reverse
    controlled pressure control valve (PCV)
  • Hand Refill Pump
  • Circulating Pump
  • Mechanical seal
  • Chemical industry
  • Oil and gas industry
  • Petrochemical industry
  • Refining technology
  • PED 2014/68/EU (Design and production in
    accordance with EU Pressure Equipment Directive)
  • ASME VIII, Div.1 (Design, calculation and production)
  • BFS 2000 system is employed for
    applications in sealing systems with a wide
    variety of operating parameters for supplying
    buffer/barrier fluid to double and tandem
    mechanical seals. The BFS 2000 system is
    available in standard sizes with flat ends,
    sight-glasses for level monitoring and with or
    without cooling coil. BFS 2000 system is
    equipped as a standard with all the necessary
    system connections and brackets. Modular
    design combination available with a wide
    variety of system components and
    instruments selection possible such as, level
    switch, circulation pump, hand refill pump,
    thermometer, base frame etc.
  • Circulation in accordance with API 682 / ISO
    21049: Plan 52, Plan 53A