Bray F15 & F30 - Manual

Installation and Maintenance Manual
F15/F30 Ball Valves
Date: August 2011 / Page 1 of 5
®
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
INSTALLATION - MAINTENANCE MANUAL
F15 and F30 Series
150 and 300 Lb. Flanged Full Port Ball Valves
DESIGN
The design features of this valve include a split body,
two piece construction, allowing ease of maintenance
without special tools. These valves feature a “free float-
ing” ball. The ball is not fixed, but is free to move with
the line pressure.
As a result of this feature, these valves are capable of
tight shut-off with flow in either direction or dead-ended,
regardless of the position of the valve in the line.
The downstream seat, opposite the pressurized side of
a closed valve, must carry the load exerted by the line
pressure on the ball, while the upstream seat is subject
to little load or wear. For this reason, it is sometimes
possible to increase useful seat life by turning the valve
end-for-end in the pipeline.
1. USE:
The valve should be maintained as part of a preventative
maintenance program and in accordance with Flow-Tek’s
recommended pressure, temperature and corrosion limits
to insure a long service life. During shipment, storage,
and in operation, the valve should be fully open or fully
closed (“open” is preferred for shipping and storage).
Do not use in throttling service without investigating flow
and pressure conditions.
WARNING: Before installing this equipment, confirm
that it is suitable for the intended service.
The identifications tags describe the maximum allowable
service conditions for this product.
Be sure that the installation is protected by appropriate
pressure control and safety devices to insure that accept-
able limits are not exceeded.
2. OPERATION:
Operation of the valve is done by turning the handle a
1/4 turn (90 degree turn). CW to close, CCW to open.
A. VALVE OPEN POSITlON
The handle is parallel with the pipeline.
B. VALVE IN CLOSED POSITION
The handle is perpendicular to the pipeline.
Valves with actuators should be checked for actuator -valve
alignment. Misalignment will result in high operational
torque and damage to valve stem and seals.
3. STEM SEAL ADJUSTMENT
1. For 1/2”- 2”, if slight leakage is noted at stem,
straighten lock washer tab, tighten stem nut to
flatten Bellville Washers, back stem nut off 1/4
turn, secure lock washer tab.
2. For sizes larger than 2”, simply tighten gland
bolts evenly until leak stops. Do not over tighten.
4. GENERAL INFORMATION FOR ON-SITE
INSTALLATION:
The valve may be fitted in any position on the pipeline.
Before installing the valves, the pipes must be flushed
clean of dirt, burrs, and welding residues, or the seats
and ball surface will be damaged.
5. DISASSEMBLY AND CLEANING PROCEDURE:
CAUTION: Line must be depressurized before disas-
sembly. Valve should be cycled to assure there is no
pressure is trapped in valve cavity. Ball valves can trap
pressurized media when closed. Flush line with valve
1/2 open to remove hazardous media.
WARNING: DO NOT remove packing gland or any
other valve parts while line is under pressure!
Stem seal leakage may be corrected without disassembly
by tightening the packing gland nut until such leakage
stops. If the leakage continues or valve operating torque
becomes excessive, the seals are worn and replacement
will be necessary.
If the valve has been used to control hazardous media,
it must be decontaminated before disassembly.
It is recommended that the following steps be taken for
safe removal and assembly.