Installation Waukesha Cherry-Burrell
Page 14 95-03087 10/2012
Connect the cavity cleaning supply to a suitable liquid supply to
flush the vent/drain (Figure 6) during the operation of the pro-
cessing system.
The flush supply line can be connected to the pipe system by 1/4"
(6 mm) rigid or poly flow tubing. The flush supply is blocked when
the valve is open.
Connect the supply line to the adapter connection with poly flow
tubing (Figure 6).
WARNING:
During CIP cleaning and valve opening (W71/
W73), fluid escapes from the drain port. Drain this off to
prevent a possible hazard to personnel.
Regulate the flush supply (Figure 6, item A) for pressures of 30
psi minimum, 50 psi maximum.
The maximum solution temperature is 180°F (60°C).
WARNING:
Cavity cleaning operation must fall within the
fail-safe control system. See “Cleaning” on page 21.
WARNING:
Take proper precaution to safeguard the flush
water supply, such as installing backflow prevention
devices.
External Flush - Steam
Vent Cavity
Figure 7 - External Steam Barrier -
upper stem
Steam Vent Cavity, Upper and Lower Stem
Use both Upper Stem Steam Flush Adapter and Lower Stem
Steam Adapter.
This option allows continuous steaming of the vent cavity (in both
open and closed positions), upper and lower stems.
DANGER:
Valves equipped with the steam flush option for
stem and vent cavity can produce high temperatures and
steam hazards that may result in personal injury or death.
To steam flush the upper and/or lower stem as well as the vent
cavity, the Mix Proof Valve must be ordered with the Steam Flush
for stem and vent cavity. This option (See Figure 8 on page 15)
contains the following components:
• External flush connection, 1/4" NPT.
• Modified adapter with removed o-rings to flush the stem.
• Jacket with 1/4" Tube (S.S.) on lower balancer to flush the
lower stem (balancer).
• EPDM gaskets for all seals in the wetted area.
WARNING:
The W-Series Mix
Proof Valve equipped with the
steam flush option for stem and
vent cavity is designed only for
low-pressure, product-
compatible saturated steam
with a maximum pressure of
10 psig (0.65 bar) = 240
°F
(115
°C) temperature.
Installation
Installation of a steam flush system on a W-Series Mix Proof
valve should be done only by a licensed Steam Fitter.
The valve must be installed vertically to drain out any steam/con-
densate and have a drain funnel placed directly below it. Refer to
Figure 8 to see the shut-off valves in the supply lines.
Figure 6 - Connection of Flush Supply
A
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