Bray Cryogenic - Manual (Page 5)

Installation and Maintenance Manual
Multiport Threaded and Weld End Ball Valves
Date: August 2011 / Page 5 of 6
®
A Subsidiary of BRAY INTERNATIONAL, Inc.
FLOW-TEK, Inc. Tel: 832.912.2300 © 2011 Flow-Tek, Inc.
8323 N. Eldridge Pkwy #100 Fax: 832.912.2301
Houston, Texas 77041 www.flow-tek.com
IMPORTANT NOTES:
Valves with vented balls shall be installed with the
vent upstream.
All cryogenic valves shall be installed with the stem
within +/- 25 degrees of vertical.
Do not use the body screws to pull the pipe ends
together or into alignment.
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.
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 BUTT AND SOCKET
WELD END VALVES
(FP/SP2000, FP/SP3000 Series)
Insure that appropriate weld procedures are imple-
mented that are compatible with the materials used.
Socket weld ends: Insure proper stand off spacing of
pipe end to bottom of socket is 1/16” before welding.
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).
12. Short and Long Term Storage:
Short term:
1. Short term storage is defined as storage of products
and equipment to be used in the construction of a
project for periods of one to three months.
2. Ball valves should remain in the original shipping
containers be placed on pallets of wood or other
suitable materials. End protectors should remain