Samoa UP20 Serie Guía De Servicio Técnico Y Recambios página 12

EN
REPAIR AND MAINTENANCE PROCEDURES
BALL VALVES AND SEATS MAINTENANCE
1. Close fluid valves.
2. Drain the fluid from inside the pump. Anticipate a drainage of fluid
from inside the pump.
3. Remove the inlet and outlet manifolds. Take note of the orientation of
the manifolds.
4. Install a new set of valves or seats according to these assembly
drawings. Tighten the manifold bolts with a maximum torque of
80 N·m (60 ft.lbs).
IMPORTANT: Always approximate manifold bolts before final
tightening.
AIR VALVE
MAINTENANCE
1. Remove the six screw of the "aircap".
2. Remove the "aircap" and pull out
the air valve.
3. Place the bottom gasket in the
new air valve.
4. Insert the new air valve.
5. Place the "aircap" with the gaskets
in its housing.
6. Tighten the screws with a maximum
torque of 15 N·m (11 ft.lbs).
AIR SENSOR MAINTENANCE
12
855 872 R. 06/21
SAMOA Industrial, S.A. · Pol. Ind. Porceyo, I-14 · Camino del Fontán, 831 · 33392 - Gijón - Spain · Tel.: +34 985 381 488 · www.samoaindustrial.com
The air sensors are on the central body.
To access them, follow the procedure for "Replacing diaphragms".
Once removed the covers following procedure:
1. Remove the two screws that secure the air sensor to the top.
2. Remove all components of the sensor. Clean the area.
3. Introduce new components in the order shown.
4. Fit the remaining components in reverse order. Fit the sensor cover and tighten the screws.
Outlet manifold bolts
80 N·m (60 ft.lbs)
Soft Seat
Inlet manifold bolts
80 N·m (60 ft.lbs)
IMPORTANT:
Follow the diaphragm maintenance procedure
to ensure no damage in the diaphragm during
its assembly.
Hard seat
assembly
IMPORTANT:
Soft seats (NBR, Hytrel
Santoprene ® ) don't need extra seals
and the seat is simetric.
Hard seats (PP, POM,
aluminum, stainless steel),
additional o-rings for sealing.
Balls must be always assembled over
the seat.
IMPORTANT: When doing a pump
maintenance that implies manifold
disassembling and pump is fitted
with PTFE o-rings (white colour),
they must be replaced by new ones
in order to avoid fluid leakages".
and
®
PVDF,
use