Installation and Maintenance Manual
Triad Series Ball Valves
Date: August 2020 / Page 6 of 7
FLOW-TEK, Inc. Tel: 832.912.2300
© 2020 Flow-Tek, Inc.
8323 N. Eldridge Pkwy #100 Fax: 832.912.2301
Houston, Texas 77041 www.flow-tek.com
9. INSTALLATION OF THREADED VALVES
Valve can be screwed on without the use of union or with the
end caps removed from the body.
The use of a thread sealant is recommended;
Apply wrench only on the valve end being tightened. Do not
tighten by applying torque to the opposite end cap or other
valve component. Tightening by using the valve body, handle
or the opposite end cap can seriously damage the valve; Use a
wrench on both the second end cap and pipe to avoid applying
torque to the body through the bolting.
In some applications, screwed valves may be back-welded.
Disassemble as per instructions for weld end valves.
Confirm that the end cap bolt holes are aligned with the body
screw holes on both ends and that the end caps are parallel
and correctly spaced to fit the valve body before re-assembly
or back welding.
Do not use the body screws to pull the pipe ends together or
into alignment.
10. INSTALLATION OF EXTENDED WELD END VALVE
Insure that appropriate weld procedures are imple-
mented that are compatible with the materials used.
Butt weld valves with 3 inch or longer extended weld ends do
not require disassembly for installation welding.
Simply ensure that ball is in the full open position, and perform
normal welding procedures, using care that the valve body does
not reach a temperature above 200°F.
11. INSTALLATION OF WELD-END VALVES (FPI-
SP2000, FPISP3000 Series)
Insure that appropriate weld procedures are imple-
mented that are compatible with the materials used.
Tack weld the valve to the pipe at four points on both end caps.
With the valve in open position, (the valve is in the open position
when the handle is parallel to the axis of the valve and pipe),
loosen all body bolts, take the body out.
Turn the handle in the half open position to assist in the removal
of the seats and body gaskets.
Turn handle in closed position and remove ball.
Place all removed parts in a clean and secure place.
Replace the body and all bolts and tighten them slightly. This
operation is very important, so that the body and end caps
remain perfectly parallel, thus preventing any leakage at the
body joint after welding.
Finish welding both end caps onto the pipe.
When cool, clean end caps, turn valve to closed position and
replace ball. Turn valve in open position and replace seats and
body gaskets.
Place body between the two end connections; then replace all
bolts and tighten firmly
(See table 1. Tightening torques for end cap screws).
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