Nova-Tech LMI Roytronic Excel Series AD Metering Pump - Manual (Page 26)

26
MAINTENANCE
5.5 Injection Check Valve Parts Replacement
Depressurize and drain pipeline (or isolate Injection Check Valve point using valves) so that
Injection Check Valve can safely be disassembled.
ALWAYS wear protective clothing, face shield, safety glasses and gloves when working near
or performing any maintenance or replacement on your pump. See MSDS information from
solution supplier for additional precautions.
Refer to the LMI Metering Pump Price List for the proper Spare Parts Kit or RPM Pro
Pac
™ kit number or contact your local LMI stocking distributor.
1. Isolate Injection Check Valve and depressurize pipe or drain pipeline.
2. Carefully depressurize and disconnect the discharge line (see Section 5.1 or 5.2 in this
manual).
Spare part replacement kits include specific instructions for valve replacement. Please
follow the instructions included with the replacement kit.
3. Carefully disconnect the tubing leading to the Injection Check Valve, then remove the
Injection Check Valve Fitting. Remove and replace the worn spring, seat, ball, and
O-ring.
Before disassembling the check valve, note the orientation of the parts.
4. Install a new spring, seat, ball, and O-ring. Ensure that the parts are oriented
correctly.
Spring
Ball
Injection Check
Valve Fitting
Seat
O-Ring
O-Ring