7-3
Valco Cincinnati, Inc.
MS013 - DD-1 Pump Manual (built after 9/06)
Section 7 - Maintenance
Teflon check valves (ball type) are standard on the DD-1 pump. Teflon is
used with fluid viscosity of 1-2500 cps. Stainless check-balls, for viscosity
greater than 2500 cps, are also available .
To disassemble the check valves, follow these steps:
Warning!
Warning!
Warning!
Warning!
Warning!
Discharge line must be depressurized before removing
check-balls. Otherwise, personal injury and damage to
equipment may result.
1.
Follow the shutdown procedure on page 7-1.
2.
Remove the cap and the cap O-ring.
3.
Using a small screwdriver, remove the top and bottom check-
balls.
You may also turn the pump on its side and
the balls will fall out.
4.
Replace the old check-balls with new ones (see Parts List).
5.
Replace the corner (see Parts List) if the check seat is damaged
(see Figure 7-1).
6.
Reassemble the cap and the cap O-ring.
Disassembly
Procedure for
Check Valves
