Leslie Controls DKLO D1, DKLO D4 User Manual
12501 Telecom Drive, Tampa Florida 33637
Sizes ½” through 4” ANSI CLASS 125/250
Installation, Operating and
Maintenance Instructions
Supplement
DKLO D1 & D4 CONTROL VALVE
10/5.5.2
Rev. 1
TABLE OF CONTENTS
INTRODUCTION.......................................................................................................................................2
OPERATING PRINCIPLE.........................................................................................................................4
INSTALLATION.........................................................................................................................................4
START-UP....................................................................................................................................................4
TROUBLESHOOTING ..............................................................................................................................4
MAINTENANCE.........................................................................................................................................6
REMOVAL OF ACTUATOR FROM VALVE BODY ASSEMBLY.......................................................6
REVERSE ACTING PNEUMATIC ACTUATOR ...................................................................................6
DIRECT ACTING PNEUMATIC ACTUATOR.......................................................................................6
DISASSEMBLY OF VALVE BODY........................................................................................................6
DISASSEMBLY OF ACTUATOR ...........................................................................................................6
RE-ASSEMBLY OF ACTUATOR ...........................................................................................................7
LAPPING PLUG INTO SEAT ..................................................................................................................7
PACKING REPLACEMENT....................................................................................................................7
RE-ASSEMBLY OF VALVE BODY (D1) ...............................................................................................7
RE-ASSEMBLY OF VAVLE BODY (D4) ...............................................................................................7
REPLACING ACTUATOR ON VALVE BODY-PNEUMATIC.............................................................7
REVERSE ACTING..................................................................................................................................7
DIRECT ACTING .....................................................................................................................................7
ACTUATOR ADJUSTMENT – PNEUMATIC........................................................................................7
REVERSE ACTING..................................................................................................................................7
DIRECT ACTING .....................................................................................................................................7
PARTS LIST
.............................................................................................................................................................................
8
ILLUSTRATION INDEX
FIGURE 1 - TYPICAL STEAM INSTALLATION.......................................................................................................................4
FIGURE 2 - VALVE BODY ASSEMBLY D1 1"-2".....................................................................................................................9
FIGURE 3 - VALVE BODY ASSEMBLY D1 - 1/2" - 3/4"...........................................................................................................9
FIGURE 4 - VALVE BODY ASSEMBLY D4.............................................................................................................................10
FIGURE 5 - ACTUATOR ASSEMBLY D1&D4.........................................................................................................................11
FIGURE 6 - PISTON DIAPHRAGM ASSEMBLY.....................................................................................................................12
INTRODUCTION
This Installation, Operation, and Maintenance Manual is
intended to be as complete and up to date as possible. It
covers installation, operation, and maintenance procedures
for Leslie Controls, Inc. DKLO D1 & D4 Control Valve.
Leslie reserves right to update this manual and other
product information concerning installation, operation,
and/or maintenance, at any time and without obligation to
notify product owners of such changes.
Leslie is not responsible for injury to personnel or product
damage due to improper installation, operation, and/or
maintenance Leslie Controls, Inc Back Pressure
Regulators. All installation, operation, and maintenance
procedures should only be performed by trained/certified
personnel. All personnel performing these procedures
should completely and carefully read and understand all
supplied materials before attempting procedures. All
personnel should pay strict attention to all Notes, Cautions,
and Warnings that appear within procedures detailed in
this manual.
Leslie welcomes user input as to suggestions for product or
manual improvement.
Contact Information
For information concerning warranties, or for questions
pertaining to installation,
Operation or maintenance of LESLIE products, contact:
LESLIE CONTROLS INC.
12501 Telecom Drive
Tampa, FL 33637
USA Phone: (813) 978-1000
USA Fax: (813) 978-0984
www.LESLIECONTROLS.com
To order replacement parts, contact LESLIE CONTROLS
at address listed above, or call toll free:
USA/Canada/Caribbean Phone: (800) 323-8366
Note: Please include model and serial number of unit for
which parts are being ordered. If ordering by phone, please
have this information readily available.
GENERAL NOTES AND WARNINGS
Notes:
• If questions are not answered by this manual, or if
specific installation, operation, and/or maintenance procedures are not clearly
understood, contact Leslie Controls, Inc. for
clarification before proceeding.
• If unit is damaged during installation, operation, or
maintenance, complete following steps:
1. Turn off and lock out pneumatic supply to unit in
an approved manner.
2. Turn off all incoming valves.
3. Contact in-house maintenance personnel or Leslie
Controls, Inc. for instructions.
Note: Throughout this manual, warnings will be
denoted by BOXES
Piping system must be adequately designed and
supported to prevent extraordinary loads to pressure
It is strongly recommended that this document be reviewed
before attempting any installation, operation, or
maintenance procedures. Use Instruction 20/0.5.1 for
General Installation, Operation and Maintenance Data.
CAUTION!
equipment.
2
The DKLO Series Control Valve is designed for
Cv TABLE
DIMNESIONS
inches (mm)
AND WEIGHTS
pounds (kg)
economical control of steam, water, gas and process
applications in typical institutional, commercial and
industrial processes. The DKLO Series is available with
either a direct or reverse acting actuator that meets most
application requirements.
MAXIMUM RATED FLOW COEFFICIENTS* (Cv)
VALVE SIZE
½ ¾ 1 1 ¼ 1 ½ 2 2 ½ 3 4
5.2 7 11 20 25 30 71 94 146
Size
½ - ¾
(15)-(20)
1
(25)
1 ¼-1 ½
(32)-(40)
2
(50)
2 ½
(65)
3
(80)
4
(100)
A B C
5 ½
(140)
7 3/16
(183)
8 7/8
(226)
8 7/8
(226)
9 3/8
(238)
10
(254)
11 7/8
(302)
1 11/16
(43)
2 7/8
(74)
3 1/8
(79)
3 1/8
(79)
5 ¼
(133)
6 1/8
(155)
7 1/8
(181)
1 3/16
(30)
2 5/16
(58)
2 7/8
(74)
2 7/8
(74)
4 5/8
(118)
5 3/8
(136)
7 3/8
(187)
36 in2 60 in2 36 in2 60 in2 36 in2 60 in
9 7/8
(251)
9 7/8
(251)
9 7/8
(251)
9 7/8
(251)
--
--
--
--
--
--
E F Weight
--
--
11 ¾
(298)
11 ¾
(298)
11 ¾
(298)
11 7/8
(302)
11 7/8
(302)
11 7/8
(302)
9 ¼
(235)
9 ¼
(235)
9 ¼
(235)
9 ¼
(235)
--
--
--
--
--
--
--
--
11 ¼
(286)
11 ¼
(286)
11 ¼
(286)
11 ¼
(286)
11 ¼
(286)
11 ¼
(286)
21
(9.5)
25 ½
(11.6)
31 ½
(14.3)
33 ½
(15.2)
--
--
--
--
--
--
2
--
--
39
(17)
45
(20)
47
(21)
72
(33)
84
(39)
145
(66)
PERCENT OF TRAVEL 5 10 20 30 40 50 60 70 80 90 100
Valve Size Travel Orifice
1/2 1/4
C 0.1 0.2 0.3 0.36 0.41 0.46 0.51 0.56 0.6 0.65 0.7
Cv
E 0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2 2.1
A 0.3 0.6 1.2 1.7 2.2 2.6 2.9 3.1 3.2 3.25 3.3
B 0.15 0.25 0.65 1.5 2.7 3.3 3.7 3.9 4.1 4.2 4.3
T 0.7 1.2 2.0 2.7 3.2 3.8 4.3 4.7 4.9 5.1 5.2
3/4 5/16 T 0.7 1.3 2.4 3.3 4.2 4.9 5.5 6.0 6.4 6.8 7.0
1 1/4 T 0.7 1.3 2.4 3.8 5.5 4.7 9.0 10.0 10.6 10.9 11.0
1-1/4 5/16 T 0.8 1.7 4.0 6.5 9.3 12.6 15.3 17.0 18.1 19.1 20.0
1-1/2 5/16 T 1.0 2.0 4.5 7.2 9.9 12.4 15.2 18.2 20.9 23.4 25.0
2 5/16 T 1.0 2.0 4.5 7.4 10.6 15.1 18.8 22.8 26.1 28.3 30.0
2-1/2 3/4 T 5 11 23 36 46 53 59 62.5 65.7 68 71
3 3/4 T 5 11 30 47 61 72 79 85 90 92 94
4 3/4 T 12 23 46 69 89 104 116 127 134 140 146
3
OPERATING PRINCIPLE
The Dklo D1 & D4 Valves are flow to open, globe style,
pneumatic diaphragm control valves. The pneumatic
actuator can be arranged to operate with either air to open
control. A controller sensing the controlled variable
provides a signal to the actuator of the control valve to
obtain the desired control. See application guide for other
operating instructions.
service is recommended. To eliminate excessive noise with
steam and other compressible fluids, enlarge the delivery
pipe size to effect a reasonable flow velocity at the reduced
pressure. A concentric transition is recommended. If
possible, avoid sharp turns close to the valve bullheaded
tee connections to a low pressure main. Install initial and
delivery pressure gauges to indicate performance. If the
rating of the delivery system or connected equipment is
less than the initial pressure, provide a safety relief valve.
Figure 1 – Typical Steam Installation
START-UP
Flush piping system thoroughly to clear it of welding
beads, scale, sand, etc. Install valve with the arrow on the
side of the valve body pointing in the direction of fluid
flow. Install controller and accessories in accordance with
instructions furnished by the manufacturer of these items.
Connect necessary airlines and/or electrical connections
INSTALLATION
Locate the valve in a straight run of horizontal pipe as
shown in Figure 1. The valve should be mounted with the
actuator in the upright position. Allow room for removal of
the actuator. Prevent pipeline hammering in compressible
fluid service by providing proper drainage before and after
the valve. Avoid damaging effects of scale and dirt in
pipelines by using a strainer. A 3-valve by-pass to
facilitate inspection and maintenance without interrupting
to diaphragm chamber and valve mounted accessories. Use
1/4" O.D. tubing for all air lines. If length of the air line
exceeds 25 ft, use 3/8” O.D. tubing. Insulation, if desired,
may be applied to the valve body only. Do not insulate
bonnet. Caution: Hazardous fluids may be handled by this
valve. Only qualified personnel, who are familiar with
your installation, should be permitted to install, readjust,
inspect or maintain the valve.
TROUBLESHOOTING
For troubleshooting of the controlling device and
accessories, see instruction furnished by manufacturer of
these items. To troubleshoot valve and actuator, check for
the following: change in operating conditions; pneumatic
signal failure; diaphragm failure; foreign matter lodged
between seat ring and plug; actuator vent plug may be:
plugged, missing, replaced with a solid plug; packing
leakage.
4
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