Bray 7000_8000 Series - Manual (Page 4)

Installation and Maintenance Manual
Series 7000 and 8000 Ball Valves
Date: August 2011 / Page 4 of 9
®
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
5. VISUAL INSPECTION:
Clean and inspect metal parts. It is not necessary to
replace the ball and stem unless the seating surfaces
have been damaged by abrasion or corrosion.
Replacement of all soft parts is strongly recommended
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.
6. RE-ASSEMBLY:
½”-2” VALVE RE-ASSEMBLY PROCEDURES:
(refer to page 6)
1. Hold the body horizontally in a vise firmly enough
that it will not move but do not crush it.
2. Put washer protector (11A) and thrust washer (12)
on valve stem (5) and slide the stem into the stem
hole from inside valve body (1);
3. Slide the stem packing components (14) onto the
stem until they are bottomed in the stem hole;
4. Put packing protector (11B) and packing gland
sleeve (15) onto the stem on top of the packing set.
5. Install the Belleville washers, tab washer and nut
onto the stem hand tight.
6. Turn the stem until the upper stem flat is perpendicular
to the valve centerline (closed, so that the ball can
fit onto the stem):
7. Iinstall the ball (3) inside the valve body. The lower
stem flats will fit into the slot on top of the ball;
8. Turn the stem so that the ball is in the open position
(the ball will not fall out of the valve);
9. Install the seats (4) and body seals into the body
ends. Make sure the spherical curvature side of the
seat will face the ball;
10. Lift the valve into position between the flanges in the
pipeline.
11. Install the end cap bolts (9), lock washers (7) and
nuts (8). Cross tighten all nuts to the values indicated
in Table 1.
12. (Note: The use of a bore alignment tool, about 1.0
mm (0.04 inch) less than the internal diameter of the
end cap and ball, inserted through the end cap and
ball will prevent the ball from turning as the stem
gland nut is lightened on the stem.
13. The bore alignment tool should be made from a
material softer than 300 Series S.S. so that it will
not inadvertently scratch the valve end cap or ball.
Suggested materials: aluminum T6061. Acetal or
other suitable hard polymer/plastic material.)
14. Secure the tab washer with one ear bending up;
Place the handle (25) onto the stem, on top of the
stem gland nut (26);
15. Secure the handle (25) with the remaining stem lock
nut (26).
16. Cycle the valve slowly several times. By cycling slowly,
the seats will align with and conform to the ball. A fast
turning motion initially may damage the seats before
they have a chance to form the proper seal:
3”&4” VALVE RE-ASSEMBLY PROCEDURES:
(refer to page 7)
1. Hold the body horizontally in a vise firmly enough
so it will not move but do not crush it.
2. Install bearing sleeve (13), washer protector (11A)
and thrust washer (12) on valve stem (5) and slide
the stem into the stem hole In valve body (1):
3. Slide the stem packing (14) onto the stem until it is
seated in the bottom of the stem hole;
4. Put packing protector (1lB), then packing gland
sleeve (15) on top of the stem packing;
5. Install packing gland (16) and bolts (17). Lightly
tighten to secure packing gland.
6. Install stop housing (20) and housing bolts (21) hand