Personnel Qualifications - Customer Service; Disconnecting Electrical Connections; Valve Verify And/Or Replacement; Pumps Type Ly, Lyh - OBL X9 Series Operating Manual

X9 Series metering pumps
7.5.1

Personnel qualifications - Customer service

Entrust the maintenance, repairs and overhauls to experienced and qualified personnel who will restore the
original equipment conditions. For information please contact OBL customer service.
7.5.2

Disconnecting electrical connections

Before disassembling the pump always disconnect all the electrical connections. Make sure that any risk of accidental restart of the
machine has been excluded.
GB
7.6

VALVE VERIFY AND/OR REPLACEMENT

7.6.1

Pumps type LY, LYH

NOTE: BEFORE start to disassembly, make sure there is no pressure or high temperature in the pipeline !
Operate with pump OFF. To verify conditions and/or replace the valves proceed as follows (see figure 12):
release the pump from suction and discharge pipeline, and clean adequately
-
remove the valve housing one at a time (pos.14)
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delicately extract the internal components without damaging them (use a plastic tool)
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carefully observe and check the direction of assembly of each components
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check the cleaning, wear and proper direction of assembly of components
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the ball valve (pos.15) MUST be SMOOTH, and not have dents or corrosion signs
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the valve seat (pos.5) must have smooth bevelled surfaces with no dents or signs of wear
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verify the integrity of the O-rings (sealing components) (pos.8; 9; or 77)
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if necessary, replace the damaged components
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reassemble everything exactly as shown in figure 12
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ATTENTION: The valve (pos.15) MUST sit on valve seat (pos.5) on the OPPOSITE side of large bevelled surface.
Figure 12
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LY, LYH PUMPS: PUMPHEAD COMPONENTS
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Operating manual
File: UT-4336 – Rev.0