Hale Torrent SVS Stainless Steel Valves - Manual (Page 95)

sealant or P.T.F.E. tape to flange bolts and tighten to the required torque,
tightening opposing bolts to ensure actuator sits down square and
concentric to the valve stem. Reference Fig. A1.
N.B. Dowel pins should be considered for location and anti-rotation of
actuator to valve during operation.
5.2 If any adaptor plate is fitted between the actuator and valve interface
flange, dowel pins should be considered for location and anti-rotation of
actuator. The adaptor plate should be sealed to both actuator and valve.
5.3
For internal fixing screws, apply sealants to the underside of the screw
head and faces. Reference Fig. A2 and A3. Refit the actuator cover with
a suitable sealant or gasket as supplied. Recommended sealant Loctite
574 or 572.
5.4 Unless otherwise specified, units are supplied grease filled for life, under
normal operating conditions, this is 10 years. If the worm box
requires filling on installation (normally only if internal fixing screws are
customer supplied) remove top cover and pack grease to the top of the
quadrant gear teeth. Ensure a minimum of air pockets. Recommended
grease is a good quality EP.2. N
°2 consistency, which covers max/min
operating temperature conditions. Spurboxes and mitres are always
grease filled for life. Reference Fig. B for grease levels in wormbox.
N.B. Special grease may be required for high/low temperature, nuclear,
oxygen, firesafe or submersible applications.
5.5 After fitting the actuator to the valve, stop screws should be adjusted to
suit the open and shut positions. For electric actuation drive, it is normal
to set the open and shut position on the electrical limit stops. The manual
actuator stop screws should then be wound down to the quadrant stop
pad and wound back one half turn. The manual stop screws then are
only contacted in the event of electrical limit switch failure.
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