Bray 5000_6000 Series User Manual

Page 3

Installation and Maintenance Manual

Series 5000 and 6000 Ball Valves

Date: August 2011 / Page 3 of 6

A Subsidiary of BRAY INTERNATIONAL, Inc.

FLOW-TEK,

Inc.

Tel:

832.912.2300

8323 N. Eldridge Pkwy #100

Fax: 832.912.2301

Houston,

Texas

77041

www.flow-tek.com

closed. Lift the ball from body, using a strap and lift

device if necessary.

NOTE: Extreme caution should be taken to avoid

damage to the ball.

7. The 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.

Disassembly for servicing seats and stem seals may be

performed without removing the end flanges from the

pipeline.

This feature allows the removal of the valve from service

without disturbing piping connections.

5. VISUAL INSPECTION:
Clean and inspect all metal parts for damage and wear.

It is not necessary to replace the ball and stem unless

the sealing 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

leakage. 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. Any lubricant used

must be compatible with the intended line fluid.

6. RE-ASSEMBLY:
Refer to the illustrations on page 4 and 5.

1. Hold the body horizontally in a vise firmly enough

that it will not move but do not crush it.

2. Put thrust washer (12) on valve stem (5) and slide

the stem into the stem hole from inside the valve

body (1);

3. Slide the stem packing components (14) onto the stem

until they are bottomed in the stem hole;

4. Install the packing gland nut (15) into the body over

the stem and packing. Tighten finger tight.

5. Turn the stem until the upper stem flat is perpendicular

to the valve centerline (closed, so that the ball can

fit onto the stem):

6. Install the ball (3) inside the valve body. The lower

stem flats will fit into the slot in the ball;

7. Turn the stem so that the ball is in the open position

(the ball will not fall out of the valve);

8. Install the seats (4) and body seals into the body

ends. Make sure the spherical curvature side of the

seat will face the ball;

9. Lift the valve into position between the flanges in the

pipeline. Use caution that the seal components do

not shift position or fall out.

10. Install the end cap bolts (9), lock washers (7) and

nuts (8). Alternately cross tighten all nuts gradually

up to the values indicated in Table 1. Using a torque

wrench is recommended.

11. Install and secure the handle (25) with the handle

washer (19) and handle nut (26).

12. Cycle the valve slowly several times. Cycling the

valve slowly will insure that the seats will align with

and conform to the ball. A fast turning motion may

damage the seats before they have a chance to

form the proper seal:

Refer to the instructions given in section 2, above, to

re-commission the valve after installation.

For automated installations, follow the instructions

provided with actuation instrumentation to correctly

set up and recalibrate the installation.

Table 1 - Tightening torques for end cap nuts

VALVE SIZE

1/4” 3/8” 1/2” 3/4”

1”

1 -1/4” 1-1/2”

2”

2-1/2”

3”

4”

NutTorque (lb-in)

155

300

(Lb-ft)