Flowserve CL94 Series Three-Piece Chlorine Ball Valve 1/2-2 - Manual (Page 2)

2 06959-G
Flow Control Division
Worcester Controls
OPERATION
A. The operation consists of turning the stem (by manual or
automated means) ¹ ₄ turn clockwise to lose and ¹ ₄ turn counter-
clockwise to open. When the handle (if used) and/or stem flats or
groove are in-line with the pipeline, the valve is open.
B. 94 Series valves will provide bubble-tight shutoff when used in
accordance with Worcester’s published pressure/temperature
chart.
C. Do not leave the ball partly open (throttling operation) without
having the first determined whether the pressure drop and/or flow
rate are detrimental to the valve seats. These conditions should be
checked with Worcester’s Control Valve Manual or the factory.
D. Torque Requirements: Operating torque requirements will vary
depending on the length of time between cycles, media in the
system, and line pressure. The figures in the following table are
based on laboratory tests with clean tap water as the media. They
are measured at WOG rated pressure, 70°F, after 24 hours. For a
more detailed analysis of valve torque requirements, see
Worcester’s Actuator Sizing Manual.
Maximum Expected Breakaway
Valve Size Torque (In.-Lbs.)
¹⁄₂" 50
³⁄₄" 75
1" 125
1 ¹⁄₂" 450
2" 600
3" 1200
4" 2000
MAINTENANCE
For maximum stem seal life, proper packing adjustment procedure
must be followed.
A. Tighten packing gland bolts to the torque values in the tables
below. Alternate between the two gland bolts when tightening to
maintain the alignment of the gland plate with the top of the
valve body. Some rocking of the gland plate can be tolerated;
however, excessive misalignment may cause premature failure of
the stem packing.
Gland Bolt Torque (In.-Lbs.)
Valve Size “T” Packing
¹⁄₂"–³⁄₄" 40-45
1" 65-70
1 ¹⁄₂"–2" 85-95
3"–4" 175-200
NOTE: After adjustment, packing creep will occur over several
hours. Bolt torque measured then will be lower.
REBUILDING
This manual contains exploded views of the valves covered by the
text. They have been included to aid in the rebuilding of the valves.
Please refer to them when following the written instructions.
a WARNING: BALL VALVES CAN TRAP PRESSURIZED FLUIDS IN
THE BALL CAVITY WHEN CLOSED.
The valve must be decontaminated before disassembly. It is
recommended that the following steps be taken for safe removal
and disassembly:
• Relieve the line pressure. Operate the valve prior to attempting
removal from line.
• Place the valve in half-open position and flush the line to remove
any hazardous material from the valve. Refer to Chlorine Institute
Pamphlet 6 procedure for flushing and drying.
• All persons involved in the removal and disassembly of the valve
should wear the proper protective clothing such as face shield,
gloves, apron, etc.
• Refer to Chlorine Institute Pamphlet 6 for additional information
on precautions and cleaning.
A. A standard repair kit can be ordered for the CL94 Series valve
containing all the necessary parts for standard valve rebuilding;
seats, split thrust bearing, split ring, all non-metallic stem packing
parts, and Belleville washers. To order, specify the valve size and
series, the material of the seats, and the “R” number (Revision
Number) or for non-standard valve, the “P” number, “T” number,
“C” number, or similar number. This information is found on the
nameplate on the valve body.
Repair Kit Ordering Examples:
1" CL RK 94 T R1 or
2" CL RK 94 RT R1
2" CL RK 94 RT TO726
CAUTION: If the seats and seals installed differ from those
removed, the valve nameplate or stop MUST be replaced or
remarked to indicate the altered materials and ratings or valve
tagged to so indicate.
B. TO DISASSEMBLE ¹⁄₂"–2" THREE-PIECE CL94 VALVES:
1. Place valve in open position. Remove three body bolts and
nuts and loosen fourth to swing the center section out from
between the pipe ends, or remove all four bolts to remove the
valve from the line; whichever is more convenient.
2. Close the valve. Remove the seats and ball.
3. Remove the handle (if any), gland bolts, Bellevilles, gland
plate and follower(s) (1 or 2 pieces) from the top of the valve.