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Bray F15 & F30 User Manual

Page 2

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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.