miniBOOSTER

Hydraulic Booster

miniBOOSTER is a oscillating booster. 
They automatically intensify the system pressure giving a higher 
outlet pressure and will compensate for oil loss on the high pressure side.
■Max. 20 times Intensification
■Compact Size & High Performance
■Space Saving & Cost Reduction
■Various Models to meet different demand

The increase pressure actuation system of hydraulic boosters HC series




miniBOOSTER are oscillating 
boosters. They automatically
intensify system pressure 
giving a higher outlet pressure
and will compensate for oil 
loss on the high pressure side. 
This function of the miniBOOSTER
is based on the patented system 
as shown above.

The basic design incorporates a 
low-pressure piston (LP), a 
high-pressure piston (HP) and
a bistable reversing valve (BV1).
The dump valve (DV) is an optional
feature.









Hydraulic fluid at system pressure is supplied to port IN. It flows 
freely past check valves KV1, KV2 and DV (if included) via port H. At 
this point all flow goes through the booster, and a cylinder on the 
high pressure side H will move fast forward. As the cylinder meets resistance 
pressure increases in the high pressure side H equal to the pump supply 
pressure. This causes check valves KV1 and DV to close and the oil is directed 
to Vol 1. The bistable valve BV1 connects Vol 2 to tank via Vol 3.
As pump pressure is applied to Vol 1 the pistons move down.
When the piston has fully moved down, Pilot string 1 is energized operating the
bistable valve BV1 changing its position. Fluid is led to Vol 2 moving the 
pistons upward delivering fluid at higher pressure. The resultant pressure is
determined by the ratio in area of the low pressure piston LP to the high 
pressure piston HP. Once the high pressure piston HP has moved up, Pilot string 
1 is connected to tank, the bistable valve BV1 returns to its original position 
and the cycle is repeated until the required end pressure has been established.
 At that point the intensifier stops and will only start again to maintain the 
pressure at the high pressure side of H. Pressure can be relieved from the high
 pressure side through the pilot operated check valve DV (if included). 
By connecting port R to the supply pressure and port IN to tank, pilot string
 3 will be pressurized, allowing the fluid from the high pressure side H to flow
 back to tank.

General Specifications

Temperature range -40℃ to 120℃
Maximum inlet flow See performance data for each model
Fluids Recognized hydraulic and transmission fluids
compatible with Buna-N seals
For other fluids please contact technical sales
Inlet pressure Min. 20 Bar (290 psi), Max. 200 Bar (2.900 psi)
Note: Outlet pressure must never exceed 800 Bar
(11.600 psi), Except for the HC8.
Filtration 10 micron nominal; Max. 19/16 according to ISO 4406
Connections See data for each model.
Materials Bodies, cast iron, internal components, steel:
External surface, zinc chromate finish;
Static seals, Nitrile; No dynamic seals

As shown on the chart miniBOOSTER has a dual flow/ pressure feature. Initially 
when fluid is supplied to the booster it flows straight through to the high 
pressure side.
At this point all the supplied flow (up to the max. allowed inlet flow) goes 
to the actuator allowing it to operate fast in the desired direction. As soon 
as inlet pressure is reached in the actuator, the flow will then be supplied 
via the high pressure piston until intensified pressure is reached.

Advantages summarized

●Gives high pressure whenever needed

●Expensive high pressure pumps not required

●Expence saved on tubing

●Increase expensive high pressure by simply increasing inexpensive low pressure

●Low pressure is changed into high pressure with hardly any use of energy or  heat generation

●Leakages on the high pressure side compensated dynamically

●System works with labyrinthine tubing which gives a longer life

●No rotating parts

●Light weight

●Small size – big performance