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WCB_D4_D4SL_sch5_US.indd
D4 / D4 SL Schedule 5 Series
Double Seat Mix Proof Valves
Instruction Manual: US - rev. 0
Waukesha Cherry-Burrell
®
brand D4 / D4 SL Schedule 5 Valves
6. Cleaning
In the cleaning process of the valves, distinction is made between the
following areas: Flow areas, Seat area, and Leakage chamber.
6.1.
Flow area
The CIP-fluid cleans the upper and lower passages of the valve during
CIP.
6.2.
Seat area - D4 SL valve
(chapters 6.5. and 6.6.)
The seat area and leakage chamber are cleaned through lifting of the
individual valve shafts during cleaning of the respective passage.
6.3.
Seat area and Leakage chamber
CIP spraying cleans the seat area and the leakage chamber. The clean-
ing connection is at item C in fig. 6.3.
D4 valve:
CIP spraying must generally be undertaken.
CIP spraying does not produce pressure build-up in the leakage cham-
ber. SPX FLOW recommends performing CIP-spraying in the closed
valve position; however, it can also be done in the open valve position.
Under standard conditions 15 valves 2" Sh5 - 3" Sh5 can be cleaned
via one spray distribution line 1" (DN25).
6.4.
Cleaning recommendation
Cleaning steps
Seat lifting cycle
(D4 SL)
CIP spraying
pre-flushing
–
3 x 10 sec.
caustic flushing 176°F (80°C)
3 x 5 sec.
3 x 10 sec.
intermediate flushing
2 x 5 sec.
2 x 10 sec.
acid flushing
3 x 5 sec.
3 x 10 sec.
subsequent flushing
2 x 5 sec.
2 x 10 sec.
-
D4 SL Valve:
The lifting cycles refer to a cleaning pressure of
p = 29 - 72 psi (2-5 bar).
- Depending on the pressure ratio, cleaning temperatures, cleaning steps
and degree of soiling, time and number of cycles must be adjusted.
- Flushing quantities per CIP spraying cycle:
2" Sh5 - 3" Sh5
about 0.32 US gal/10s (1.2 ltr/10s)
- Cleaning pressure at CIP cleaning connection:
min. 29 psi (2 bar)
max. 72 psi (5 bar)
Caution!
The cleaning liquid applied must be compatible with the respective seal
material.
C
CIP spraying
free drain
CIP liquid
fig. 6.3.
!
