The pressure injection pump Type GSF 35-2 PU is a pneumatically driven, single acting piston pump that operates after the pressure intensification principle. The area ratio of drive pressure to pressure piston ring area yields the pressure ratio which is 41:1 in type GSF 35-2 PU pumps.

The pump consists of a pneumatically actuated drive part and a high-pressure part. Drive part and high-pressure part are linked with a piston rod. Two parallel high- pressure pistons are arranged at the end of the piston rod and are connected via a yoke. Thus, the drive and high-pressure parts are isolated  and  it  is  prevented that pump medium  gets  into  the  pneumatic drive part in case of leakages in the high-pressure sealing. The piston rods are of high-tensile stainless steel and boast long service lives. The valve seats are of  tempered  steel and the sealings of wear resistant UHMW-PE..

Application: The GSF 35-2 PU is designed for fast and easy to use injections into   coal and stone. The pump is mainly used for heading and field purpose, it can handle most materials on polyurethane base with a mix ratio of 1:1.

Technical Data:
Air drive pressure1-5 bar / 14,5-87psiConnections
Max. operating pressure at 5 bar inlet pressure205 bar / 2900psiAir connectionRD 32 x 1/8“
Pressure ratio41:1Suction connectionRD 32 x 1/8“
Stroke volume per double stroke49cm³ / 2,99inch³Pressure outletSteck-O DN 10
Max. operating temperature60°CWeightca. 84 kg
LiquidsPolyurethan Silicate resin
Max. flow rateca. 8 l/min on free outlet
For information of flow rates at the different pressure stages please refer to the performance graph.
Air piston diameter160 mm
High-pressure piston diameter25 mm
DimensionsHeight370 mm
Width330 mm
Length720 mm

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