Lutz Size 1 - 1/4", Руководство по эксплуатации

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5
GB
Maintenance Model 3/8", Band Clamp Version
3.3 Maintenance Model 3/8"
3.3.1 Maintenance of Max-Pass- or Check Valve
. Flush and neutralize the pump to be certain all corrosives or hazardous materials are removed prior to any main-
tenance. This procedure should always be followed when returning pumps for factory service also.
. Remove the nuts (3) and washers (4) from the bolts (3) in manifolds. Remove the manifolds (0), (). Two
of the four max-pass valves and back-ups (3, 4) are located inside of the bottom of the outer chambers (6).
Gently remove and inspect for excessive wear, pitting or other signs of degradation. Inspect manifold o-ring ()
as well and replace if necessary. The other two max-pass valves are located inside of the bottom of the discharge
manifold (0). Repeat the procedure for inspection of discharge valves, back-ups and o-rings.
(Some pumps such as those built with PTFE have ball valves in place of the max-pass valves. Repeat the proce-
dure – inspect valve seat (8), balls (9), ball cage (7) and o-ring ()).
3. When re-assembling the max-pass pump, the sleeve (5) should be assembled into the valve cavity first, fol-
lowed by the max-pass valve (3), the valve back-up (4) and finally the o-ring ().
For pumps with ball valves, the cage (7) should be assembled into the valve cavity first, followed by the ball
(9), valve seat (8) and finally the o-ring ().
Lightly tighten all external fasteners when assembling, torquing them to their requirements after pump is com-
pletely assembled.
Caution!
When using pumps built with PTFE o-rings always replace with new PTFE o-rings, since the original o-rings
may not reseal the pump.
3.3.2 Maintenance of Diaphragms
4. To inspect diaphragms, remove the nuts (7) from the carriage bolts (8) on the band clamps (6) surrounding the
outer pump chambers (6). If replacement is necessary due to abrasion or rupture unscrew the outer diaphragm
plates (7). Only models that have PTFE elastomers will have both a PTFE overlay (8) that faces the outer pump
chamber and an o-ring (5) on the air side of pump. Note: Pumps that do not contain PTFE will not have o-ring
(5), they are built with diaphragms (9) only.
5. To inspect the diaphragm rod`s lip seals (6) remove diaphragm rod (5). Before remove the air valve assembly
() by unscrewing the screws (9). Replace if necessary. Be sure to reinsert the lip seals with open cup facing the
inside of the pump. Make sure that the rod guide is facing the air valve assembly and slide the diaphragm rod
back into the intermediate.
6. Take one diaphragm and with the curved side of the inner diaphragm plate facing the diaphragm, assemble onto
the outer diaphragm plate stud (7). Screw the assembly into the end of the diaphragm rod. Repeat for the other
side. Tighten the outer diaphragm plates to 4.5 Nm of torque.
7. Position outer diaphragm chambers onto the intermediate, making sure that the witness line of the intermediate
matches with the parting line of the chamber.
8. When positioning band clamps use soapy water or a compatible lubricating spray on the inside of band clamps to
aid assembly. Tap with a mallet on the outside of clamp to help position the clamp while tightening the fasteners.
The band clamp fasteners are stainless steel. To prevent galling always apply anti-seize compound to the thread.
Tighten all external fasteners to final torque requirement after pump is completely assembled.
9. Position the reassembled manifolds making sure of the proper orientation in relation to the air valve for your
application. Also make sure that the valve seat o-rings do not shift from their grooves during reassembly. Flat
washers should be placed under the head of each cap screw and nut. Tighten all external fasteners to final torque
requirement after pump is completely assembled.