11
Re-assemble the meter in the opposite direction making
sure all bolts are torqued to the proper specifications.
Differential Valve Service (see pages 14 &16):
Remove the outlet piping flange (44).
Remove the connecting tube between the differential
valve and the vapor eliminator.
Remove the Screws (8) securing the cover (1) from the
valve body (14).
Remove the differential valve piston assembly and
spring.
Inspect the valve body and cover for damage. Clean all
surfaces of dirt or deposits using a fine (200 grit) emery
cloth if necessary. If damage is more than superficial,
replace the valve.
Inspect all seals and replace any brittle or damaged
seals. It is recommended that all seals be replaced
during service.
Replace the diaphragm (5) seals and O-rings (10 and
11). Note proper position of the seals. Use a small
amount of Teflon lubricant to help install the seals.
Re-assemble the valve in the opposite manner.
Back
Check Valve Service (see pages 12 and 16):
Disconnect the inlet piping from the meter assembly at
the differential valve outlet flange.
Remove the meter as detailed in the METER DISAS-
SEMBLY section.
Remove the back check valve assembly (33).
Manually open and close the valve to assure proper
operations.
Inspect for dirt of salt build-up and clean if necessary.
Inspect the seals for wear or damage. Replace worn or
brittle seals.
Reassemble the valve and install in the strainer hous-
ing. This valve is optional and will not retrofit into strain-
er housing not originally supplied with the valve.
Reassemble the system making sure bolts are torqued
to the proper specifications
Strainer Service: (See page 16)
Remove the four bolts (30) from the front cover and
remove the cover (55).
Inspect the seal (56) and replace if damaged or brittle
Remove the strainer (54). Clean the strainer with low
pressure air, blowing out all loose sediment. Wash the
strainer with solvent.
Inspect the strainer for holes or other damage and re-
place if necessary.
Re-assemble making sure the bolts are torqued to the
proper specifications.
Vapor Eliminator Service: (See pages 13 & 16)
Disconnect the vapor return line flange and the differen-
tial valve tubing.
Remove the four bolts (47) from the vapor eliminator
housing.
Remove the cover from the vapor eliminator housing.
Remove the float and valve assembly from the cover for
inspection.
Inspect the float for damage or leakage. A crack will
allow the float to fill with liquid and sink thus prevent the
valve form closing. A collapsed float is an indication of
over pressure or hammer and these operation condi-
tions must be corrected before reusing the meter.
Inspect all seals, and replace if damaged or brittle.
Flow Meter Maintenance
mdi - Manufacturers Distributor Inc. | Phone: (813) 241 - 4900 | Fax: (813) 571 - 0422 | www.FillRitePumpSales.com | [email protected]
