Type M
Hydraulic oil pump


The high pressure Type M hydraulic axial piston pump is of a rotating swash plate design which enables either single or multiple deliveries from the same pump.

Various combinations of flows and pressures are possible within the 2.0 kw range up to a maximum of 690 bar (10,000 psi) at 1.15 litres/min (0.25 gpm).

The pump is quiet in operation; its numerous applications include laboratory use, swaging, pressing and tensioning machines.

Under normal working conditions the M pump gives long life and requires little maintenance.

This pump conforms to Directive 94/9/EC relating to equipment intended for use in potentially explosive atmospheres and is ATEX (ATmosphere EXplosible) certified.
Marshalsea Hydraulics has been assessed by SGS Société Générale de Surveillance SA and certified as meeting the requirements of ISO 9001:2000 for the design, development, manufacture and servicing of hydraulic pumps, relief valves and intensifiers.

Pressure and flow combinations

Pump No. Piston size Stroke
length		 Theoretical
flow (cc/rev)		 Max pres.
(bar)
Three piston versions
11350 – 01  3 x 6 mm full 0.43 690
11350 – 02  3 x 0.250 in full 0.50 690
11350 – 03  3 x 0.313 in full 0.79 690
11350 – 04  3 x 0.375 in full 1.12 550
11350 – 05* 3 x 6 mm full 0.43 690
11350 – 06  3 x 6.3 mm full 0.47 690
11350 – 10  3 x 6 mm full 0.43 850
Six piston versions
11360 – 01  6 x 0.250 in full 0.96 690
11360 – 02  6 x 0.313 in full 1.60 500
11360 – 03  6 x 0.375 in full 2.29 350
Pump output is directly proportional to drive speed to a maximum of 1,800 rpm.
* Inlet port in end cover for 11350-05

Material
Cast iron casing. Mild steel cylinder block/shaft. (Other materials available for special purposes).

Fluids
A mineral-based oil is recommended with additives to resist corrosion, oxidisation and foaming.

System temperature
Minimum – 10°C; maximum + 70°C.

Weight
10.50 Kg.

Installation

Rotation is bi-directional and the pump may be mounted horizontally or vertically (shaft up) using a three piece flexible drive coupling between the pump and prime mover. If vertical mounting is selected, our Technical Department should be consulted.

A suction filter of at least 125 microns should be used, and care should be taken to ensure that the filter is of adequate size and does not cause more than 300 mm (12 in) Hg depression at the pump suction port when operating at full flow.

A return line filter of 10 microns rating should be fitted. Pipes should be of sufficient size to give not more than

3.70 m/sec (12 ft/sec) fluid velocity in the delivery line and not more than 1.3 m/sec (4 ft/sec) in the suction line.

As a guide, based on the port sizes of the pump, delivery lines should be 6.5 mm (¼ in) bore and suction lines 13 mm (½ in) bore.

We recommend that the fluid reservoir should be kept between 50 mm (2 in) and 3 m (10ft) above the suction port.

A safety relief valve set at the maximum pump rating should be fitted immediately downstream of the pump delivery port.

Maintenance instructions and a spares list are provided with each pump.