Bray F15 & F30 - Manual (Page 2)

Installation and Maintenance Manual
F15/F30 Ball Valves
Date: August 2011 / Page 2 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
As shipped from the factory, Valves contain Silicone based
lubricant. This is for break-in and may be removed by
disassembly and solvent washing, if it is objectionable
for a particular application,
6. DISASSEMBLY FOR STEM AND SEAL REMOVAL:
1. Remove flange bolts and nuts and lift valve from
line for servicing.
NOTE: Care should be taken to avoid scratching
or damaging serrated flange face. These valves
are heavy!
They should be adequately supported before
removal from the line is begun.
2. Loosen handle set screw and remove handle and
stop plate. Next, remove gland nuts, gland flange
and gland.
3. Remove body end nuts, using proper wrench size.
Lift off body end. One seat should come out with
body end.
4. Remove body seal.
5. To take out the ball, rotate stem so ball is in fully
closed position. Lift ball from body, using a strap
and lift device, if necessary. NOTE: Extreme cau-
tion should be taken to avoid damage to the ball.
6. Take out other seat.
7. Stem must be removed from inside the body - a
tap on the top of the stem should loosen it. The
thrust washer should come out with the stem. Then
remove the stem packing.
7. VISUAL INSPECTION:
Clean and inspect metal parts. It is not necessary to
replace the hall and stem unless the seating surfaces have
been damaged by abrasion or corrosion. we strongly
recommend replacement of all soft parts whenever the
valve is disassembled for reconditioning.
This is the surest protection against subsequent leakage
after valve assembly. The replacement parts can he
ordered in kit form.
NOTE: The valve may be assembled and operated
dry where no lubricants are allowed in the system;
however, a light
lubrication of mating parts will aid in assembly and
reduce initial operating torque. Lubricant used must be
compatible with the intended line fluid.
8. ASSEMBLY:
1. Install one seat in the body seat cavity with the
spherical curvature facing the ball.
2. Install thrust washer on stem and slide the stem
up through the body. Install packing and packing
gland with packing gland bolt.
3. Install stop plate, handle and handle retainer nut.
4. Turn the handle CW to the CLOSED position. Line
up the ball slot with the stem tang and slide the
ball into position. Turn the handle CCW to the
OPEN position to hold the ball in place.
5. Install the remaining seat into end cap seat pocket
6. Put body seal gasket into shoulder counter bore
at flange in valve body.
7. Put end cap back into body and line up end flange.
Because the body flange bolt pattern is different
from the line flange bolt pattern, it is possible to
assemble the valve which the bolt holes in the
line flanges don’t line up. Be certain to align end
flanges bolt holes to straddle valve center lines.
NOTE: Be careful not to damage body seal when
assembling end into body.
8. Install body end nuts and tighten in a crossing
pattern to the torque specified in Table 1.
9. WARNING: Extreme care must be exercised
during adjustment of body stud nuts to make sure
that body studs are fully engaged. There should
be at least one stud thread exposed beyond the
flange on the body side and beyond the nut on
the cap side.