Installation
The HEYPAC GX and KR series pumps are rugged, high quality products and their long
service life can be assured by correct installation.
Installation illustrations: click to enlarge
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Installation
- Attach mountings, if supplied with pump, as shown using bolts supplied.
- R1, R2, R5 and R5ST reservoir equipped units must be mounted with their axis vertical,
with reservoir below pump. R3 and R4 reservoir equipped units should be mounted
with their axis horizontal with foot mounting bracket below the pump. All other
units may be mounted to suit the application.
- A suitably sized air filter (25 micron rated) regulator with auto drain must
be connected as close as possible to the pumps air inlet. The pneumatic drive and
control system of the pump are pre-lubricated (& self-lubricating), so an air line
lubricator is not required. If the air supply already has a lubricator
fitted and it is not possible to be removed then two matters must be considered;
a) the air line lubricant must always be present otherwise premature wear of air
valve seals will take place and the air valve may malfunction, b)the air-line lubricant
must be of adequate lubricity, most air-line lubricants are too thin. If for any
reason lubrication has ceased the air valve should be re-lubricated with the correct
grade of HEYPAC grease.
- A suitable compressed air dump valve should be fitted immediately before the air
filter regulator. It is recommended that when the pump is not in use the compressed
air is vented to atmosphere immediately rather than allowing the air pressure to
gradually decay over a period of time. This will ensure trouble free re-starting
of the pumps after long periods of inactivity.
- A suitable flow control valve must be fitted to prevent over speeding if the pump
is to be used at or near maximum flow rate.
- As hydraulic pressure cannot be reduced by relieving air supply pressure, it may
be convenient to incorporate a pressure release valve downstream.
- A suction strainer is supplied with all pumps that are mounted to reservoirs. The
standard suction strainer is rated at approximately 150 micron. A 40 micron rated
strainer is available as an option. Please note that pumps without reservoirs (models
OO, T & W) are supplied without strainers. An extended suction tube kit, which includes
a strainer, can be supplied for T configuration pumps that are to be tank mounted.
Suction lines should be of a size to handle twice the rate of output flow as the
pump only draws fluid in on alternate strokes.
- Reservoirs must be fitted with breathers and filled with CLEAN fluid. With
R type units it may be easiest to remove the reservoir from the pump, fill the reservoir
and then refit the reservoir to the pump.
- HEYPAC pumps will run on a wide variety of fluids, but it is the responsibility
of the user to ensure that the system fluid is compatible with the pump. Fluids
that have been successfully pumped include: Mineral oils, vegetable oils, water
glycol solutions, phosphate and silicate esters, liquefied petroleum gases, water
and many others.
- For non R type units the seal drain connection must be piped to the system reservoir.
This is integral on R type pumps.
- In addition to the suction strainers fitted to some models of pump it is recommended
that pressure and return line filters be fitted to the pump. A range of 10 micron
rated return line filters are available to suit KR and GX series pumps.
- Due to the pumps’ ability to maintain pressure at zero flow we recommend
the use of either zero leak or ultra-low leakage directional valves, such as poppet
construction type, to protect the pump from excessive cycling, premature wear, unnecessary
energy consumption and reduce noise levels.
Start Up
- The reservoir may need to be re-filled several times during initial starting. It
is safe and sensible practice to fill the system and purge it of air at relatively
low pressure.
- Increase air pressure from zero until the unit pumps steadily (about 1.5 bar). Pay
close attention to the oil level in reservoir at all times, stop and re-fill if
the fluid level approaches the minimum mark. Cycle any control valves to promote
purging of air from cylinders or motors. Pause occasionally to allow air in the
fluid to clear.
- Some systems may require an air vent between the pump & other parts of the circuit.
- Ensure that the reservoir is not overfilled at any time, such that retraction of
cylinders etc. will cause overflow.
- Finally, gradually increase the air pressure until the required hydraulic working
pressure is achieved.
Operation
- Do not exceed the rated output of the unit.
THE MECHANISM IS ROBUST ENOUGH TO WITHSTAND SHORT PERIODS OF OVERSPEEDING, BUT CONTINUED
ABUSE WILL EVENTUALLY CAUSE FAILURE.
- Use as low an air pressure as is practical (within the limits of 1.5 to 7 bar for
GX series pumps and 1.5 to 8.5 bar for KR series pumps). This will save energy,
achieve quieter running and extend service life.
- Do not allow hydraulic over pressure to be fed back into the pump from any pressure
intensifying effects which may be present in the circuit. (e.g. differential ram
areas and the like)