SANDPIPER EB1-SM - Manual (Page 2)

Model EB1-SM Type 3 Page 2 520-079-000 9/00
CAUTION
If a diaphragm fails the pumped
product or fumes can enter the air
side of the pump. This side is exhaust-
ed through the exhaust port (muffler).
When the product is a hazardous or
toxic material, the exhaust should
be piped to an appropriate area for
safe disposition. When the product
source is at a higher level than the
pump (flooded suction), the exhaust
should be piped to a higher level
than the product to prevent spills
caused by siphoning.
Ball retainer
For the most efficient use of compressed air and the longest diaphragm life, throttle
the air inlet to the lowest cycling rate that does not reduce flow.
AIR EXHAUST
If a diaphragm fails, the pumped liquid or fumes can enter the air end of the pump,
and be exhausted into the atmosphere. When pumping hazardous or toxic materials,
pipe the exhaust to an appropriate area for safe disposition.
This pump can be submerged if materials of construction are compatible with the
liquid. The air exhaust must be piped above the liquid level. Piping used for the air
exhaust must not be smaller than 1" (2.54 cm). Reducing the pipe size will restrict air
flow and reduce pump performance. When the product source is at a higher level than
the pump (flooded suction), pipe the exhaust higher than the product source to prevent
siphoning spills.
Freezing or icing of the air exhaust can occur under certain temperature and humidity
conditions. Use of a Warren Rupp Air Dryer unit should eliminate most icing problems.
BETWEEN USES
When used for materials that tend to settle out or transform to solid form, the pump
should be completely flushed after each use, to prevent damage. Product remaining in
the pump between uses could dry out or settle out. This could cause problems with
valves and diaphragms at re-start. In freezing temperatures, the pump must be drained
between uses in all cases.
CHECK VALVE SERVICING
Need for inspection or service is usually indicated by poor priming, unstable cycling,
reduced performance or the pump’s cycling but not pumping.
Inspect the surfaces of both check valve and seat for wear or damage that could
prevent proper sealing. If pump is to prime properly, valves must seat air tight.
DIAPHRAGM SERVICING
Remove the eight nuts securing the outer diaphragm chamber flange and remove the
chamber. Loosen the capscrew securing the diaphragm and plate to the rod by leaving
the diaphragm engaged with the capscrews around the outer flange, preventing rotation
of the rod. DO NOT USE A WRENCH ON THE DIAPHRAGM ROD. FLAWS ON THE
SURFACE MAY DAMAGE BEARINGS AND SEAL.
During reassembly make certain that the rubber bumper is on the rod on each side.
Install the diaphragm with the natural bulge outward as indicated on the diaphragm.
Install the heavier plate on the outside of the diaphragm and make certain that the large
radius side of both plates are toward the diaphragm. Place the sealing washer between
the inner diaphragm plate and the end of the rod. Tighten the capscrew to approximately
25 ft. lbs. (33.90 Newton Meters). Torque while allowing diaphragm to turn freely with
plates. Except for EPDM rubber, use a lightweight oil between plates and diaphragm
when doing this procedure. Use a wrench on the capscrew of the opposite side to keep
the rod from rotating. If the opposite chamber is assembled, the rod need not be held.
When assembling the outer chambers and the manifold, the bolts securing the
manifold flange to the chamber should be snugged prior to tightening the chamber bolts,
to insure that the chamber port flange is square with the manifold flange. Finish
tightening the manifold flange bolts after chamber bolting is secured.
A NOTE ABOUT AIR VALVE LUBRICATION
The SandPIPER pump’s pilot valve and main air valve assemblies are designed to
operate WITHOUT lubrication. This is the preferred mode of operation. There may be
instances of personal preference, or poor quality air supplies when lubrication of the
compressed air supply is required. The pump air system will operate with properly
lubricated compressed air supplies. Proper lubrication of the compressed air supply
would entail the use of an air line lubricator (available from Warren Rupp) set to deliver
one drop of 10 wt., non-detergent oil for every 20 SCFM of air the pump consumed at
its point of operation. Consult the pump’s published Performance Curve to determine
this.
It is important to remember to inspect the sleeve and spool set routinely. It should
move back and forth freely. This is most important when the air supply is lubricated. If
a lubricator is used, oil accumulation will, over time, collect any debris from the
compressed air. This can prevent the pump from operating properly.
DANGER
Before doing any maintenance on
the pump, be certain all pressure is
completely vented from the pump,
suction, discharge, piping, and all
other openings and connections.
Be certain the air supply is locked
out or made non-operational, so that
it cannot be started while work is
being done on the pump. Be certain
that approved eye protection and
protective clothing are worn at all
times in the vicinity of the pump.
Failure to follow these recom-
mendations may result in serious
injury or death.