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Design and principle of operation
Stem locking for CIP or SIP
See section 6.1 on page 15.
The Type 2371-10 and Type 2371-11 Regu-
lators can be fitted with a stem locking to keep
the plug in the open position. In this version,
the plug can be locked in the open position to
allow the valve to be cleaned (CIP = Cleaning
In Place or SIP = Sterilization In Place) while it
is open.
The stem can be locked in place pneumatical-
ly by an additional pneumatic unit with com-
pressed air connection (for Types 2371-10
and 2371-11) or manually using a special
pin (for Type 2371-11 only).
The pneumatic and manual stem locking do
not affect the control function of the valve,
provided the stem locking is not engaged.
Pneumatic stem locking · Types 2371-10/-11
Fig. 2: Stem locking
8
ê
p
∙
G
connection
1
/
8
V
Pneumatic unit
The pneumatic unit for the pneumatic stem
locking is located on the top of the regulator.
The unit can be mounted in any position since
the axial fixture of the unit allows it to turn
360°.
The pin of the manual stem locking is screwed
into the adjustment opening in place of the
blanking plug.
Manual stem locking · Type 2371-11
Stem locking engaged
Pin
Lock nut
EB 2640 EN
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