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EN
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 132
lbf·in ( 15 N·m).
IMPORTANT: Always approximate manifold bolts before final
tightening.
5. Assemble the directional valve being careful not to damage the O-rings and
tighten the screws with a maximum torque of 70 lbf·in ( 8 N·m).
CAUTION!
CAUTION WHEN USING PIPE SEALS
DP200 pumps manifold fitted with PTFE (Teflon
tightened followy the shown sequence.
Alway tighten bolt (1) and (2), firstly to avoid damage the manifold and
the seals.
6
4
AIR SENSOR MAINTENANCE
The air sensors are on the inside part of the diaphragm covers.
To access them, follow the procedure for "Replacing diaphragms".
Once removed the covers following procedure:
1. Remove the three 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 side
cover and tighten the screws.
AIR SENSOR KIT: 558527
16
105260 R. 12/21
Alentec & Orion AB · Grustagsvägen 4 · SE-138 40 · ÄLTA · Sweden · +8 747 67 00 · www.alentec.com
) O-ring should be
®
1
3
5
2
IMPORTANT:
Follow the diaphragm
maintenance procedure to
ensure no damage in the
diaphragm during its assembly.
Outlet manifold bolts
25 mm (1") long
15 N·m (132 lbf·in)
Hard
seat
assembly
Soft Seats
Inlet manifold bolts are
50 mm (1.96") long
15 N·m (132 lbf·in)
This face always
downwards
IMPORTANT:
Soft seats (NBR, Hytrel
and
®
Santoprene
) don't need extra
®
seals and the seat is simetric.
Hard seats (PP, POM, PVDF,
aluminum, stainless steel), use
additional o-rings for sealing. See
seat position in the drawing to
ensure correct assembly. The
bigger diameter o-ring is
assembled over the seat and the
smaller one below it.
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".
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