Tunstall Macon STV Series Manual page 146

INSTALLATION & OPERATING INSTRUCTIONS
FLANGE VALVE CONNECTIONS
Class 150 Valves are mechanically compatible with
standard ANSI 150 lb, flat-faced or raised-faced steel
flanges or with 125 lb, cast iron flanges.
Appropriated gasket material must be used when
installing flanged-mounted flow control devices
(for example 1/16" thick ring type fiber filled gaskets).
(Not supplied by Macon). All products have a flow
direction arrow. Make sure that it is pointing in the
direction of the flow.
Installing the butterfly Valve:
Do not use flange gaskets.
GROOVED END VALVE CONNECTIONS
Grease the pipe ends, valve ends and rubber gasket
lips with grease, graphite paste or similar grease.
Slip the rubber gasket over the pipe end of each joint.
Slide the gasket past the grooves. Position the grooved
end valve between the pipe ends and slide the gaskets
back into the central spanned position.
All products have a flow direction arrow. Make sure that
it is pointing in the direction of the flow. Apply grease
on the outside of the gasket. Install housing clamps
over the gasket – insert bolts and nuts.
WELD END VALVE CONNECTIONS
Clean the end of the pipe and the valve where the
welds will be made. Make up the assembly butting the
connections together. All products have a flow direction
arrow. Make sure it is facing in the direction of the flow.
Tack weld the assembly together and observe the fit.
The molded valve gasket will seal against the
standard ANSI flanges.
Before tightening any bolts on the butterfly valve,
turn the disk of the butterfly to the full open position.
Center the valve and hand tighten all bolts. Slowly
close the disk to check for adequate disk clearance.
When properly aligned, return the disk to the open
position and evenly cross-tighten all bolts. Make sure
the disk opens and closes properly.
Tighten nuts evenly, using socket or other wrench.
Tighten so that housing clamps come together evenly.
The connection is complete when housing clamps
meet metal to metal, further tightening of bolts is
not necessary.
Pre-assemble large diameter multi-segment housing
clamps loosely and install them as half-housings.
Take up evenly from top to bottom on alternate bolts.
Warning: If the valve contains a butterfly valve do
not finish welding the assembly with the butterfly
valve installed between the flanges. This will result
in serious damage to the valve seat.
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Tunstall Corporation
118 Exchange Street
Chicopee, MA 01013
Form # IOM-03.14