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Idiomas disponibles
REPAIR AND MAINTENANCE
SHAFT, BUSHINGS AND SEALS
BALLS AND SEATS
Before opening the pump follow the steps in STOPPING THE PUMP FOR
MAINTENANCE TASKS (page 6).
1. Remove the inlet and outlet manifolds.
2. Install a new set of balls (2) or seats (3) or (4, 5) according to these assembly
drawings. Tighten the manifold bolts with 25 N·m (18 ft.lbs) torque.
IMPORTANT: Gradually tighten the manifold with the bolts before
proceeding with the final tightening.
IMPORTANT:
Soft seats (NBR, Hytrel
®
and Santoprene
seats can be assembled upside down.
Hard seats (PP, POM, PVDF, aluminum, stainless steel), use additional
o-rings for sealing.
Balls must be always assembled over the seat.
DIAPHRAGM
Before opening the pump follow the steps in STOPPING THE PUMP FOR
MAINTENANCE TASKS (page 6).
1. Unscrew the outlet manifold and lift it. Remove the valve seats, o-ring
(if applicable) and balls.
2. Turn the pump upside down to remove the inlet manifold screws.
Remove the seats, seals (if necessary) and balls.
3. Unscrew the fluid cover screws and remove it by gently pulling back.
INSTALLING NEW DIAPHRAGMS
CAUTION: Follow next procedure to ensure the diaphragms are
correctly installed. Otherwise diaphragms may be damaged,
causing fluid leaks or premature diaphragm failure.
Please note this recommendation if you notice leaks after installing
the diaphragm.
SAMOA Industrial, S.A. · Pol. Ind. Porceyo, I-14 · Camino del Fontán, 831 · 33392 - Gijón - Spain · Tel.: +34 985 381 488 · www.samoaindustrial.com
30 29
28
®
) don't need extra seals and the
First follow the procedure for "Replacing diaphragms".
1. Unscrew the air cover (32) and lift it.
2. Replace the bushing and seals (29, 30). Clean and
This side
lubricate the area.
to air
chamber
3. Fit the remaining components in reverse order.
29 30
3
Soft Seat
IMPORTANT:
If the pump maintenance involves disassembling the
manifolds and the pump is configured with PTFE o-rings (white colour),
they must be replaced by new ones
fluid leakages.
4. Remove the used diaphragm. For one-piece diaphragms unscrew by
pulling with the hand. In case of two-piece diaphragms (diaphragm with
outer piston) use an adjustable wrench and apply corresponding torque.
5. Repeat for opposite side.
NOTE:
Use a torque wrench to tighten the screws (see torques table).
CAUTION!
1. Correct assembly of the
diaphragm before the
diaphragm cover assembly.
32
2
4
5
Hard Seat
assembly
Seals
in order to avoid
2. Incorrect assembly of the
diaphragm.
Possible damage when
assembling the diaphragm cover.
R. 04/23 855 873
EN
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