SANDPIPER SSA2-A - Manual (Page 6)

Model SSA2-A Page 4 ssa2dl4sm-REV0614
RECOMMENDED
WARREN RUPP
ACCESSORIES
TO MAXIMIZE PUMP
PERFORMANCE:
• Tranquilizer ® Surge
Suppressor: For nearly pulse-
free flow.
• Warren Rupp Filter/Regulator:
For modular installation and
service
convenience.
• Warren Rupp Speed Control:
For manual or programmable
process control. Manual
adjustment or 4-20mA
reception.
For more detailed information
on these accessories, contact
your local Warren Rupp
Factory-Authorized Distributor,
or Warren Rupp corporate
headquarters.
To achieve the best diaphragm life, the components must be installed
properly. The diaphragms themselves are to be installed with their natural bulge
facing the outside of the pump. It is important that the assemblies are tightened
properly at installation. Use water as a lubricant between the diaphragm assembly
components. This will allow the parts to slide freely against each other as the
assembly is tightened. This reduction in friction will preclude any false torque
readings that may occur at assembly. Best assembly practice would let the assembly
sit idle for a short period of time (1 to 5 minutes) and then retighten to the original
torque rating. This allows for any stress relaxation to be compensated for as the
elastomer in the diaphragm initially responds to the clamp load.
2. For a bottom discharge pump the outer chamber should be installed with the
counterbored end at the bottom. It should be on top for a top discharge ported
pump. Place one outer chamber onto the inner chamber studs. Turn the hand knobs
clockwise gradually and evenly around the outer chamber until snug.
3. Next, the flap valves should be placed on the seat with the hinge pins in the seat
groove. Firmly push the wear ring onto the seat over the hinge pins of the flap valve.
This should hold the flap valve on the seat during assembly. Make sure the seat
o-ring and sealing ring are in place. Install the seat, with the flap valve in place, in
the counterbored suction manifold and out chamber. The flap valves should always
hang down. Position the counterbored manifold, with seats in place, into the outer
chamber. Turn the handle assemblies clockwise onto the manifold studs until snug.
Then position the other manifold or discharge manifold over the seat and flap valve
already in the outer chamber. Turn two more handle assemblies until snug.
4. The opposite outer chamber, with a seat installed into the counterbore and
diaphragm in place, can now be placed onto the inner chamber studs. Position the
seats and manifolds so that the outer chamber fits together. Then tighten down the
hand knobs gradually (again turning clockwise) and evenly on both sides.
5. Finally torque the hand knobs evenly on both sides of the pump to a maximum of
500 inch-pounds (42 foot pounds) (56.49 Newton meters).
6. If the pump is a bottom discharge ported pump, to change pump porting to top
discharge by removing both outer chambers and manifolds. Once the outer chambers
are removed, rotate one chamber 180° and replace on the inner chamber studs.
The counterbored end of the outer chamber should now be at the top. Turn the
hand knobs clockwise gradually and evenly around the outer chamber until snug.
Next perform step 3 above. Then rotate the other outer chamber 180° to match
the first one and perform steps 4 and 5.
PILOT VALVE
The pilot valve assembly is accessed by removing the main air distribution valve
body from the pump and lifting the pilot valve body out of the intermediate housing.
Most problems with the pilot valve can be corrected by replacing the o-rings.
Always grease the spool prior to inserting it into the sleeve. If the sleeve is removed
from the body, reinsertion must be at the chamfered side. Grease the o-rings to slide
the sleeve into the valve body. Securely insert the retaining ring around the sleeve.
When reinserting the pilot valve, push both plungers (located inside the intermediate
bracket) out of the path of the pilot valve spool ends to avoid damage.
PILOT VALVE ACTUATOR
Bushings for the pilot valve actuators are threaded into the intermediate bracket
from the outside. The plunger may be removed for inspection or replacement. First
remove the air distribution valve body and the pilot valve body from the pump. The
plungers can be located by looking into the intermediate. It may be necessary to
use a fine piece of wire to pull them out. The bushing can be turned out through the
inner chamber by removing the outer chamber assembly. Replace the bushings if pins
have bent.