Nova-Tech LMI Roytronic Series A Metering Pump User Manual

Page 27

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