Samoa UP20 Serie Guía De Servicio Técnico Y Recambios página 11

REPAIR AND MAINTENANCE PROCEDURES
TORQUES NECESSARY FOR THE PROPER FUNCTIONING OF THE PUMP
For proper operation of the pump and to prevent accidents which may
damage equipment and in the worst case, people, you must periodically
review the torques of the diaphragms covers and the DIRECTIONAL
VALVE. In the next table are shown the appropriate torques for this
purpose:
CAUTION!: DO NOT OVERTIGHTEN FASTENERS.
DIAPHRAGM MAINTENANCE
Before any intervention: DISCONNECT AIR SUPPLY OF THE PUMP.
ANTICIPATE A POSSITE LEAKAGE OF FLUID INSIDE THE PUMP.
INSTALLING THE NEW DIAPHRAGMS -
ASSEMBLING PROCEDURE
CAUTION: Follow next procedure to ensure the diaphragms are
correctly installed. If not followed diaphragm bead could be
extruded out of its housing with the resulting damage over the
diaphragm bead and thus possible fluid leaks or premature
diaphragm failure.
SHAFT, BUSHINGS AND SEALS MAINTENANCE
SAMOA Industrial, S.A. · Pol. Ind. Porceyo, I-14 · Camino del Fontán, 831 · 33392 - Gijón - Spain · Tel.: +34 985 381 488 · www.samoaindustrial.com
Cover and manifolds
TORQUES
Air cap
UP20
Diaphragms
REPLACING THE DIAPHRAGM:
1. Close inlet and discharge fluid valves.
2. Drain the fluid inside the pump.
3. Remove the discharge manifold screws and lift the
discharge manifold. Remove the valve seats, o-ring (if
applicable) and balls.
4. Invert the pump for remove de inlet manifold screws and
lift the inlet manifold. Remove the valve seats, o-ring (if
applicable) and balls.
5. Remove the fluid cover screws and remove it by gently
pulling back.
6. Remove the used diaphragm. For one-piece diaphragms
unscrew by pulling with the hand, in case of a diaphragm
with outer piston (two pieces) use an adjustable wrench.
7. Repeat for opposite side.
Diaphragm
(two pieces)
CAUTION!
1. Correct assembly of the
diaphragm before the
diaphragm cover assembly.
Follow the procedure for "replacing the diaphragm"
This
1. Remove air cover screws.
side
to air
2. Lift away the air cover from the central body.
champber
3. Now the bushing and seals can be replaced. Clean the area
and apply lubricate.
4. Fit the remaining components in reverse order.
40 N·m (30 ft.lbs)
10 N·m (7 ft.lbs)
80 N·m (60 ft.lbs)
NOTE:
To tighten the screws you must use a
torque wrench calibrated (see table in
this page).
2. Incorrect assembly of the
diaphragm.
Possible damage when
assembling the diaphragm cover.
R. 06/21 855 872
EN
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