SM-3 minipumps are designed to provide high levels of safety, provided basic safety guidelines are followed.
Make sure that all air connections are made up properly.
If NPT connections have been speci ed, the NPT t-
ting should be wrapped with two turns of PFTE tape and
screwed into the plastic plate nger tight. Tape within one
or two threads of the end.
DO NOT OVERTIGHTEN THESE FITTINGS.
MAXIMUM TORQUE 25 IN-LBS.
Inspect ttings regularly to make sure they have not loos-
All air side components must be correctly tted when ser-
vicing the pump – please refer to the maintenance section
There are no external moving parts. However, make sure
that air is disconnected when working on pumps to avoid
injury. Maximum Drive Air Pressure 125 PSI
Minipumps should be mounted on a at surface which
Location is preferably clean and dry and free from solvents
or aggressive chemicals coming into contact with the
4 slots are provided in the minipump main body for mount-
ing. Details of bolt hole positions are shown in Figure 2
SM-3 Dimensional Data section page 5. Minipumps should
be securely mounted to a rm surface to avoid damage to
connections when the pump is operating.
DO NOT OVER-TORQUE MOUNTING BOLTS.
MAXIMUM TORQUE IS 40 IN-LBS.
Pipework should not be used to support the minipump,
plumbing should be arranged that easy removal of the mi-
nipump from the location is possible. Avoid over tight pipe
runs to minipump that require pipes to be bent to disen-
gage uid and air connections.
Air should be clean and dry. SM-3 pumps will be suscep-
tible to freezing due to the water vapor condensing as the
air exhausts. Filter air to 10 micron.
“AIR MUST BE DRY OR ICING WILL OCCUR.”
No air lubrication is required and is to be avoided.
EXHAUST & SEPARATION PORT
Do not block or restrict the exhaust or separation port.
Pump performance can be reduced or pump may cease to
A clean liquid supply is essential. Inlet liquid should be l-
tered to 25 micron absolute prior to entering the minipump
high-pressure body. Should dirty liquid be used, the high
pressure seals and both check valves will wear excessively,
leading to shortened operation between maintenance.
SM-3 minipumps can generate very high liquid pressures
and great care should be taken in use and maintenance.
Make sure that the system pressure and any pressure
potentially trapped in the pump has been released prior to
Connections are either NPT, or for ratios of 100 and higher,
coned and threaded H.P. tube tting on the outlets.
NPT liquid connections should be wrapped with two turns
of PTFE tape and screwed nger tight into the connection,
then turned with a wrench a further 1 to 2 full turns.
If the tting is found not to be pressure tight, make
Note: If the tting is found not to be pressure tight, make Note:
sure that pressure is bled to zero prior to further tightening.
Coned and threaded ttings should be made up in accor-
dance with the supplier's recommendations – see Nova
Swiss cataloge, available from Sprague.
DO NOT RUN ALUMINUM BODY PUMPS ON WATER OR
