DeZurik G-SERIES Instrukcja - Strona 4

Przeglądaj online lub pobierz pdf Instrukcja dla Kontroler DeZurik G-SERIES. DeZurik G-SERIES 7 stron. Lift, turn and reseat used on ptw & pfw tapered plug valves
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DeZurik G-SERIES Instrukcja
DeZURIK
G-Series Handwheel and Chainwheel Actuators

Description

These instructions cover adjustments and maintenance for a DeZURIK G-Series handwheel or
chainwheel actuator. Two sizes, G12 and G16, are available. See Figure 1 to identify which unit you
have.
This actuator can be furnished with either cast iron or ductile iron gears.
The ductile iron gear is necessary for submerged or buried service valves or when a 2"
operating nut is installed on the input shaft. Breakage of the gear teeth will occur if cast
iron gears are torqued above 200 ft-lb's.
Cast Iron & Ductile Iron are similar in appearance: To determine if the gear material is ductile
iron, remove the cover as described in the ACTUATOR DISASSEMBLY Section. G12 & G16
gears have "M199" cast in raised letters on either the top or under side of the web between the
hub and the teeth, removal of the gear is necessary to see the marking. If there is no "M199"
on the gear, the material is cast iron.
D10083
Figure 1- Actuator Identification
Page 4
August 2012