Bray 7000, 8000 User Manual

A Subsidiary of BRAY INTERNATIONAL, Inc.

7000/8000 SERIES BALL VALVES

INSTALLATION - MAINTENANCE MANUAL

Installation and Maintenance Manual

®

Series 7000 and 8000 Ball Valves

Date: August 2011 / Page 1 of 9

USE:

The design features of this valve include three piece
construction and a “free floating” ball allowing ease
of maintenance without special tools. 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 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 ensure 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 ensure that
acceptable 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.

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.

STEM SEAL ADJUSTMENT:

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.

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 the gland
bolts evenly until leak stops. Do not over tighten.

3. GENERAL INFORMATION FOR ON-SITE
INSTALLATION:

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.

The valve may be installed in any position on the
pipeline.

The pipe must be correctly aligned and spaced as to
not induce stresses in the valve.

As shipped from the factory, Valves may 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.

INSTALLATION OF THREADED END VALVES:

A. VALVE OPEN POSITlON

The handle is parallel with the pipeline.

1. The use of a thread sealant is recommended; Use
conventional sealant, such as hemp core, Teflon, etc;

2. Apply wrench only on the hex/octagon nearest

FLOW-TEK, Inc. Tel: [phone]
8323 N. Eldridge Pkwy #100 Fax: [phone]
Houston, Texas 77041 www.flow-tek.com

© 2011 Flow-Tek, Inc.

A Subsidiary of BRAY INTERNATIONAL, Inc.

Installation and Maintenance Manual

®

Series 7000 and 8000 Ball Valves

Date: August 2011 / Page 2 of 9

the valve end being tightened. Do not tighten by
applying torque to the opposite end cap or other
valve component. Tightening by using the valve
body, handle or the opposite end cap can seriously
damage the valve; Use a wrench on both the near
end cap and pipe to avoid applying torque to the
body through the bolting.

3. In some applications, threaded end valves may be
back-welded on site. Use caution. Do not overheat the
valve body. Confirm that the end cap bolt holes are
aligned with the body screw holes on both ends and
that the end caps are parallel and correctly spaced
to fit the valve body before re-assembly or back
welding. Make up both of the threaded connections
normally and then remove the body assembly as
described below for weld-end connections before
back welding the threaded connection.

4. Do not use the body screws to pull the pipe ends
together or into alignment.

INSTALLATION OF WELD-END VALVES
(7200, 7300, 8200 & 8300 Series)

Insure that weld procedures are implemented that are
compatible with the materials used.

1. Tack weld the valve to the pipe at four points on

both end caps.

2. With the valve in open position, (the valve is in

the open position when the handle is parallel to
the axis of the valve and pipe), loosen all body
bolts, take the body out.

3. Turn the handle in the half open position. Remove

the seats and body gaskets.

4. Turn handle in closed position and remove ball.

5. Place all removed parts in a clean and secure place.

6. Replace the body and all bolts and tighten them

slightly. This operation is very important, so that
the body and end caps remain perfectly parallel,
thus preventing any leakage at the body joint
after welding.

7. Finish welding both end caps onto the pipe.

8. When cool, remove the body, clean end caps,
and reassemble per instructions below.

9. Place body between the two end connections;
then replace all bolts and cross tighten.

10. (See table 1. Tightening torques for end cap
screws).

INSTALLATION OF EXTENDED WELD END VALVE

Insure that weld procedures are implemented that are
compatible with the materials used.

1. Butt weld valves with 3 inch or longer extended

weld ends do not require disassembly for installation
welding.

2. Ensure that ball is in the full open position, and

perform normal welding procedures, using care
that the valve body does not reach a temperature
above 200°F. Use temperature measuring crayons
to monitor body temperature if needed.

4. DISASSEMBLY & CLEANING PROCEDURES:

CAUTION: Line must be depressurized before
disassembly. Valve should be cycled after draining the
system to relieve any pressure trapped in valve cavity.
Ball valves can trap pressurized media when closed.
Flush line with valve 1/2 open to remove hazardous
media. If the valve has been used to control hazardous
media, it must be decontaminated before disassembly.

WARNING: DO NOT attempt to remove packing
components or any other valve parts while line is
under pressure!

CAUTION: Properly support the valve before removing
or loosening any body bolts. The larger sizes are heavy
and may cause injury if allowed to swing or fall freely.

Remove actuation air and power connections and
confirm that there is no stored energy in the actuation
such as compressed springs or trapped air before
beginning. Stored energy devices can cause serious
injury if the energy is released without warning.

DISASSEMBLY FOR STEM AND SEAL SERVICE:

1. It is not necessary to remove the flanges from the

FLOW-TEK, Inc. Tel: [phone]
8323 N. Eldridge Pkwy #100 Fax: [phone]
Houston, Texas 77041 www.flow-tek.com

© 2011 Flow-Tek, Inc.

A Subsidiary of BRAY INTERNATIONAL, Inc.

Installation and Maintenance Manual

®

Series 7000 and 8000 Ball Valves

Date: August 2011 / Page 3 of 9

pipeline. Removing any actuation and controls may
make service easier.

2. Remove one of the upper body bolts (all but one set
of screws for 6” thru 12”) and loosen the remaining
bolts. The center body will swing out for service,
leaving the end caps in place on the pipe ends.

3. To completely remove the valve from the pipeline,
remove the remaining upper body bolt and the
body will lift free. Gently support the body in a
vise to complete the remainder of the disassembly.
To avoid damage to the seal surfaces, hold the
body horizontally across its diameter, not across
the end faces.

4. Remove the seats and end seals.

5. 1/2” thru 2-1/2” sizes; Remove the handle nut
and handle. Straighten the tab on the tab washer
and remove the lock nut. Remove the tab washer,
Belleville washers and gland sleeve.

6. 3” and 4” sizes; Loosen the handle set screw
and remove the handle. Remove the snap ring,
travel stop, housing bolts and housing. Remove
the packing gland bolts, gland, gland sleeve and
washers.

7. 6” thru 12” sizes; Loosen the handle junction
head set screw and remove the handle assembly.
Remove the snap ring, travel stop, housing bolts
and housing. Remove the packing gland bolts,
gland, gland sleeve and washers.

8. To remove the ball, rotate the stem so the ball is
fully 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.

9. 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.

FLOW-TEK, Inc. Tel: [phone]
8323 N. Eldridge Pkwy #100 Fax: [phone]
Houston, Texas 77041 www.flow-tek.com

© 2011 Flow-Tek, Inc.