MFU Multi Flow Unit

MFU Multi Flow Unit

MFU Multi Flow Unit


The Multi Flow Unit (MFU) is an economical sealing water management solution for reducing operating costs through minimized rates of fresh water and waste water. The MFU series is available in three basic versions:
MFU-MP: for single seals with flush
MFU-MQ: for seals with quench
MFU-MD: for double seals

These are available for different indicated flow ranges and with numerous system components (e.g. mounting supports, stands, hoses, alarm sensors, etc.) and other material combinations.
Circulation in accordance with API 682 Plan 32, Plan 54, Plan 62.


  • Economical supply system
  • Optimized sealing water management
  • Reduced costs for fresh water and waste water
  • Easy operation and cleaning even during operation
  • Safe operation even in case of pressure changes
  • Quick detection of seal failures

Operating range

Max. operating pressure: 25 bar (363 PSI)
Max. operating temperature: 85 °C (185 °F)
Indicated flow range (pressure drop):
0.1 ... 2 l/min. (≤0.1 bar (1.5 PSI) at 2 l/min)
0.5 ... 4 l/min. (0.1 bar (1.5 PSI) at 4 l/min.)
1 ... 8 l/min. (≥1 bar (15 PSI) at 8 l/min.)
8 ... 15 l/min. (available on request)

Functional description

The seal water control unit MFU is designed to enable easy adjustment of the rate of sealing water (flush, quench or buffer water) on rotary machines to the optimum and lowest level of water consumption necessary for the seal's safe operation. Key parameters such as pressure and flow can be permanently monitored for early detection of any malfunctions. The buffer medium is supplied by an external system.

Product variants

Designation MFU-MP MFU-MQ MFU-MD
Pressure gauge
Pressure control valve
Flow rate (l/min.) 1 ... 8 1 ... 8 1 ... 8
Allowable pressure 25 bar (363 PSI) (*) 25 bar (363 PSI) (*)
Allowable temperature 85 °C (185 °F) 85 °C (185 °F) 85 °C (185 °F)
Accuracy ±3 ... 5 % ±3 ... 5 % ±3 ... 5 %
Housing material AISI 304 AISI 304 AISI 304
Metal parts AISI 316
AISI 304
AISI 316
AISI 304
AISI 316
AISI 304
Sight-glass Grilamid® TR 55 Grilamid® TR 55 Grilamid® TR 55
Process connections Hose nozzles
for 10 mm hose
Hose nozzles
for 10 mm hose
Hose nozzles
for 10 mm hose

Other versions with alternative connections, higher pressure and/or higher flow rates on request.

(*) Depending on range of selected pressure gauge (available range 10, 16, 25 bar)

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The EagleBurgmann BestFlow is a temperature-controlled "money-saving valve" for double seals on which the barrier water connection extends directly into the seal chamber, e.g. Cartex-DN.

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