Bray Cryogenic User Manual

Installation and Maintenance Manual

A Subsidiary of BRAY INTERNATIONAL, Inc.

®

Multiport Threaded and Weld End Ball Valves

Date: August 2011 / Page 1 of 6

CRYOGENIC AND LOW TEMPERATURE SERVICE

TRIAD SERIES BALL VALVES

(FP2000/FP3000 and SP2000/SP3000 WITH CRYO OR LOW TEMP EXTENSION)

INSTALLATION - MAINTENANCE MANUAL

DESIGN

The extended stem assembly is designed to remove
the packing components and actuation from the cold
environment.

The three piece valve assembly allows for ease of
maintenance without special tools. These valves
feature a “free floating” ball. The ball is not fixed, but
is free to move with the line pressure. All valves are
provided with a vented ball and the flow direction
is indicated with an arrow. These valves should be
installed with the vented side of the ball upstream.
The valve is unidirectional in this configuration.

The downstream seat, opposite the pressurized side
of a closed valve, carries the load exerted by the
line pressure on the ball, while the upstream seat is
subject to little load or wear.

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 (“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:

a 1/4 turn (90 degree turn). Clockwise to close,
counter-clockwise to open.

A. VALVE OPEN POSITlON

The handle is parallel with the pipeline.

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.

3. STEM SEAL ADJUSTMENT:

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

4. GENERAL INFORMATION FOR ON-SITE

INSTALLATION:

The valve must be installed in a horizontal piping run
with the stem vertical within +/- 25 degrees.

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. See sections
9 thru 11 for installation details. Note direction of
flow arrow.

5. DISASSEMBLY & CLEANING PROCEDURES:

CAUTION: Line must be depressurized before
disassembly. Valve should be cycled to assure there is
no pressure is trapped in valve cavity. Ball valves can
trap pressurized media when closed. Flush line with
valve 1/2 open to remove hazardous media.

Operation of the valve is done by turning the handle

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

WARNING: DO NOT remove packing gland or any

© 2011 Flow-Tek, Inc.

A Subsidiary of BRAY INTERNATIONAL, Inc.

Installation and Maintenance Manual

®

Multiport Threaded and Weld End Ball Valves

Date: August 2011 / Page 2 of 6

other valve parts while line is under pressure!

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.

If the valve has been used to control hazardous media,
it must be decontaminated before disassembly.

It is recommended that the following steps be taken
for safe removal and assembly.

As shipped from the factory, Valves may contain non­Silicone 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 EXTENDED STEM AND
SEAL REMOVAL:

1. Remove flange connections and lift valve from
line for servicing.

NOTE: Care should be taken to avoid scratching
or damaging mating faces.

The valve should be adequately supported and in
the open position before beginning.

2. Loosen handle set screw and remove handle and
stop plate. Next, remove gland nuts, gland flange
and gland.

3. Remove body end cap screws, using proper
wrench size. Lift off body end. One seat should
come out with body end.

4. Repeat the removal procedure for the other flange
end. Take out other seat.

5. To remove the ball, rotate the stem so 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.

6. Remove the mounting screws holding the extended
body to the valve top plate. Remove the extension
and stem components from the top plate of the valve.

7. The stem must be removed from inside the
extended 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 ball and stem unless the seating
surfaces have been damaged by abrasion or
corrosion. Replacement of all soft parts is strongly
recommend 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.

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

© 2011 Flow-Tek, Inc.