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BU Series

Bypass oil cleaners that connect directly to the high pressure line.




  • Very compact and light bypass oil cleaners.
  • Connects directly to the high pressure line. No motor and pump necessary.
  • Designed for hydraulic systems up to 350 bar system pressure.
  • All BU bypass old cleaners are fitted with M-series 3μ absolute filter elements (beta ratio ß3 >400).
  • With built in pressure and flow control valve, safety valve and pressure gauge for checking element change.
  • Low running cost, easy installation & maintenance.
  • Also available for water glycol fluids; with coated housing and WG element.

Typical applications:

  • Injection moulding machines.
  • Die-casting machines, metal working machines, like bending-, cutting-, punching machines.
  • Mobile hydraulic equipment.
  • All hydraulic systems with continuous pressure and fitted with proportional or servo-valves, and other high-tech hydraulic equipment.


  • Prevents trouble to the hydraulic equipments.
  • Improves machine reliability and productivity.
  • Longer life of all hydraulic components, pumps, servo-valves and other equipment.
  • Extends oil life by up to 40.000 hrs.
  • Very important reduction of oil consumption and the resulting waste oil.
  • Discharges the full flow filters and extends their life.
  • Important reduction of maintenance costs.


Technical specifications
(Water glycol model : BU100EW/BU200EW/BU300EW)

Article nr. TR-19450 TR-19650 TR-19530 TR-19200 TR-19320 TR-19550 TR-19100 TR-19700
Flow rate 1,0 l/m 1,5 l/m 2,0 l/m 4,0 l/m 6,0 l/m 1,5 l/m 3,0 l/m 4,0 l/m
Pressure Flow rates are guaranteed from 10 bar to 350 bar system pressure
Thread In/Out 1/4" x 1/4"
1/4" x 3/8"
1/4" x 1/4"
1/2" x 1/2"
1/4" x 3/8"
1/4" x 1/4"
1/2" x 1/2"
Element type 30 size,
M - E - X
50 size,
M - E - X
100 size, Model M - E - X - D - WE WG100 - DWG100
Nr. of elements 1 1 1 2 3 1 2 3
Max pressure Relief valve opens at 4,5 bar ΔP
Weight kg 2,5 4,0 6,5 8,0 12,0 6,5 8,0 12,0
Dimension mm 140 x 120 x 290 180 x 170 x 310 230 x 170 x 320 240 x 240 x 410 240 x 240 x 770 230 x 170 x 320 240 x 240 x 410 240 x 240 x 770
Material die casted aluminum stainless steel coated stainless steel


Oil cleaner model selection chart

ModelLiter 300Lit 450Lit 600Lit 1200Lit 1800Lit 300Lit 600Lit 800

Connecting to the high pressure line.

Please consult our installation instructions before connecting
the BU-filters to the high pressure line.

The BU200 and BU300 come with an external kit
including a flow control valve, the pressure gauge and
an air vent.

The relief valve is fitted inside the housing.

* All circumstance should be considered before selecting a suitable oil cleaner and flow control valve.

Please consult with your distributor for model detail.

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 Address: 2700 Dufferin St., Unit 86

  Phone: 1(416) 413-9202