4 | 5
General information
General information for pump operation
Pump installation
Maximator pumps can always be operated in any position, although
the horizontal position is effective in preserving the seals. For fault-
free operation, the devices should be lined with fittings and tubings
which are suitable for the desired pressure range. The connection
sizes should never be reduced.
The connections of Maximator pumps are available as BSPP-threads
and can be designed optionally as NPT threads. Both threads are sui-
table for pressures up to 1,050 bar (15,000 psi). For higher pressure
applications, from 1,050 bar upwards, we recommend the use of
Maximator high-pressure fittings.
We offer high-pressure connections in sizes
1
/
4
“,
3
/
8
“,
9
/
16
“,
3
/
4
“ and 1“
for pressures up to 7,000 bar. Depending on the pressure range, one
distinguishes here between „medium pressure” (1,550 bar [22,500
psi]), „high pressure“ (4,500 bar [65,000 psi]) and „ultra-high pres-
sure“ (7,000 bar [101,000 psi]).
Please consult the Maximator Valves, Fittings and Tubing catalog,
chapter „Tools and Installation“ for more detailed information about
the Maximator high-pressure connections.
Before starting operation
The connection for the compressed air drive is located on the spool
cycling valve housing. Series S…D, G and GSF models have a second
connection (marked by „X“) for direct pilot valve air for switching the
pump on and off via solenoid valves with small nominal size.
Pilot-valve air must be connected upstream of a pressure controller
for pumps using direct pilot air. If the direct pilot-valve air is not
connected, the pump will not function.
Before starting operation, a compressed air filter with a water se-
parator should be mounted in the air drive line in front of the pump.
We offer the technical accessories to match each series under „air
control unit C1, C2 or C3“.
As a rule, Maximator pumps do not require a compressed air oiler, as
they are treated with special grease during assembly. An upstream
connection of an oiler is recommendable if the pump is to be opera-
ted with very dry air and the duty cycle exceeds 50%.
After operating the pump with oiled compressed air, it is advisable to
retain this variant for subsequent applications. Should you change to
unoiled compressed air, the pump should be retreated with special
grease.
Drive air
In order to ensure optimal durability for the seal and guide elements,
the drive air should meet the specifications of quality grades from 3
to 4 (solids/ water / oil):
Air quality in accordance with ISO 8573-1
Specification Value
max. compressed air purity of oil (class 4): 5 mg/m³
max. number of particles at 0,1 - 0,5 µm size (class 3): 90.000 pce.
max. number of particles at 1,0 - 5,0 µm size (class 3): 1.000 pce.
max. solids, particle concentration: 5 mg/m³
max. pressure dew point at moisture (Klasse 4): +3 °C
Recommended hydraulic oils
Proper operation and efficiency of the pumps is mainly depending
on the quality of the used hydaulic liquid. We recommend hydraulic
oils with a viscosity between 46 – 68 cst (DIN 51524 T2; DIN 51519).
To prevent damage to both the inlet and outlet check valves and the
high pressure seal, a filter with a mesh width below 100 µm must be
fitted to the suction pipe.
Temperatures
The standard operating temperatures of Maximator pumps range
between -20°C and +80°C. Pumps with sealing version -VE for water
operation can be used at temperatures up to +60°C, with short-term
operation possible up to +80°C.
Emission protection
Air-driven pumps can cause such emissions as noise or air conta-
mination from the fluid. Persons located in the vicinity of running
pumps should always wear protective glasses and, if necessary, ear
protection.
Type designation
The type designations of Maximator pumps specify, as far as possib-
le, the pressure ratio of the pump and contain information about the
sealing version as well as additional options. Instructions regarding
the order code can be found in the information on our individual
pump series.