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KOSO HAMMEL DAHL
253 Pleasant Street
West Bridgewater, MA 02379
Installation, Maintenance & Operating Instructions
DIAPHRAGM-OPERATED
ACTUATORS
STANDARD SPECIFICATIONS
Diaphragm
(Effective area in
Model
square inches)
D52B / R52B
D52C / R52C
D52D / R52D
Read these instructions carefully before installation or servicing.
WARNING!
FOR YOUR SAFETY AND PROTECTION, IT IS IMPORTANT THAT THE FOLLOWING PRECAUTIONS BE
TAKEN PRIOR TO REMOVING THE VALVE FROM SERVICE OR BEFORE ANY DISASSEMBLY OF THE VALVE:
1. At all times during this procedure, keep hands out of the valve. A remotely actuated valve could close at any
time and result in serious injury.
2. Know what media is in the line. If there is any doubt, check with the proper authority.
3. Wear any protective clothing or equipment normally required when working with the media involved.
4. Depressurize the line and valves as follows:
a. Open the valve and drain the line.
b. Close and open the valve to relieve any residual pressure that may be in the valve prior to removing the valve
from service.
c. After removal and prior to any disassembly, drain any remaining media by placing the valve in a vertical
position and carefully opening and closing the valve several times.
5. The practical and safe use of this product is determined by both the trim and body ratings. Read the name tags
and check both ratings. This product is available with a variety of trim materials. Some of the trim materials have
pressure ratings that are less than the body ratings. All the body and trim ratings are dependent on valve type and
size, trim material, bolting material, and temperature. Do not exceed these ratings.
I
MO-D52/R52
9/21 Rev. 0
KOSO HAMMEL DAHL
CONTROL VALVES
Standard
Strokes
(in inches)
85
¾, 1
145
1⅛, 1½
325
2¼, 3½
1
tel: 774.517.5300
fax: 774.517.5230
www.hammeldahl.com
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Table of Contents
Related Manuals for Koso D52B
Summary of Contents for Koso D52B
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Page 1: Installation, Maintenance & Operating Instructions
STANDARD SPECIFICATIONS Diaphragm Standard (Effective area in Strokes Model square inches) (in inches) D52B / R52B ¾, 1 D52C / R52C 1⅛, 1½ D52D / R52D 2¼, 3½ Read these instructions carefully before installation or servicing. WARNING! FOR YOUR SAFETY AND PROTECTION, IT IS IMPORTANT THAT THE FOLLOWING PRECAUTIONS BE TAKEN PRIOR TO REMOVING THE VALVE FROM SERVICE OR BEFORE ANY DISASSEMBLY OF THE VALVE: 1. -
Page 2: Table Of Contents
Table of Contents Installation, Maintenance & Operating Instructions ..................1 Description ..............................3 Direct Acting Actuator ..........................3 Reverse Acting Actuator ..........................3 Receiving and transportation ........................3 Storage ..............................3 Unpacking ..............................4 Installation ..............................5 Installation temperature at site ........................5 Maintenance space ............................ -
Page 3: Description
Description Direct Acting Actuator Model D52 actuators are linear-motion spring-return pneumatic diaphragm actuators, primarily intended for use with rising stem type valves. In the “normal” position (no air pressure on the diaphragm), the direct actuator holds the stem in its retracted position by means of a mechanical spring. Increasing air pressure in the upper diaphragm chamber thrusts the actuator stem downward and compresses the spring. -
Page 4: Unpacking
Unpacking • When hoisting up the actuator from its packing, use a standard belt suited to lift the actuator . Use two pairs of lifting rings in a way that the load is applied to them equally. See Fig. 1. However, if the control valve is hoisted up with the actuator, do not use lifting rings, but hoist the control valve as illustrated in Fig. -
Page 5: Installation
Installation This actuator is heavy and therefore needs to be handled carefully and properly, following the instructions given below. Failure to observe these instructions may cause serious injuries. • For installing it in your process piping, hoist it using a hoisting machine conforming to the Occupational Health and Safety Law. -
Page 6: Maintenance Space
The dimension “H” does not include space required for lifting equipment such as a chain block and hook.. Actuator size / model D52B / R52B 24 inches, or more D52C / R52C 30 inches, or more D52D / R52D 30 inches, or more Fig. -
Page 7: Piping And Wiring Work
Piping and Wiring work • Use dry and clean instrument air for the operation source of the actuator. • An appropriate pipe diameter shall be used for instrument air supply piping to such instruments as positioner, booster relay, etc. so that air pressure will not decrease in piping. •... -
Page 8: Preparation For Operation And Operation
Use dry and clean instrument air for the operation source of the actuator, and check that its air-pressure does not exceed the setting air-pressure indicated in the specifications. When you change it, please contact Koso America. • Check that no air leaks from the joint portion of the instrument air piping and the diaphragm clamping section (the actuator circumference). -
Page 9: Operation
Changing air-pressure by the spring range, check that the rod moves as specified. When a positioner is attached, follow the instructions in the previous section (1) for adjustment and checking. Reverse action actuator (the valve opens when the instrument air- pressure is increased.) Apply the air-pressure, which is the minimum value of the spring range. -
Page 10: Structure
Spring Spring seat Center plate Connector Scale plate Hanging ring Dry bearing Hexagon bolt Fig. 8. D52B and D52C Hexagon nut Structure of direct-action type and part names Hexagon bolt Hexagon nut Hexagon bolt Spring washer Seal washer O-ring O-ring... -
Page 11: Manual Override
The manual operation unit is an optional accessory used to open and close this control valve when operational air supply is not available. The structure is shown in Fig. 10 and 11. (1) Model: D52B/R52B, D52C/R52C Fig. 10. Direct action type Fig. -
Page 12: Principle Of Operation
Principle of Operation See Fig.8, 9 and 12 for the encircled part numbers. Direct operation In the direct action (DA) type, the valve closes when the air-pressure to the diaphragm chamber increases. When air-pressure is supplied from the instrument air connecting portion the diaphragm upper case 102 to the diaphragm chamber, which consists of the diaphragm upper case, the diaphragm 108 and the diaphragm plate 104, both of which are closely set together, are activated to press down the spring 109 and move downward. -
Page 13: Daily Inspection And Periodic Inspection
Check that abnormal noise and vibration is not occurring in the control valve and the piping. If abnormality is found in daily inspection and yet countermeasures cannot be taken immediately, perform maintenance by disassembly when the plant can be suspended or ask KOSO’s service representative in charge for repair. -
Page 14: Troubleshooting And Remedies
Troubleshooting and Remedies Symptom Cause Remedy • Decrease of supply air-pressure • Supply the specified air-pressure. • Clogging or leakage from the air • Clean the piping, retighten the piping connecting portion or re-arrange the piping. • Air leakage from the clamping parts of •... -
Page 15: Disassembly
Disassembly Please follow below instructions when disassembling this actuator. Separating the valve and actuator Follow the procedure indicated below. • Follow the instructions given below for separating, ensure not to damage the valve seat surface. • For the direct-action type, reduce the air-pressure within the diaphragm chamber to zero (valve-open state). -
Page 16: Disassembling The Actuator
Disassembling the actuator See Fig. 8 and 9 for circled part numbers. Take care not to damage the diaphragm front/rear surfaces and the actuator rod surface during disassembly work. Do not disassemble the assembly of the diaphragm and actuator rod unless any anomaly is found in a visual inspection of the following parts. - Page 17 nut 124. Tighten the double hex nut on the threaded portion of the actuator rod for mounting the connector. And then loosen and remove the actuator rod 106 from the diaphragm plate 104 by utilizing the double hex nuts and fitting with a spanner wrench. •...
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Page 18: Assembly
“Periodic Inspection” section, to the sliding surfaces of actuator rod, torque lever, roller unit and manual operation unit. When assembling the diaphragm, be sure that the rubber side (KOSO mark side) is the side, to which air pressure is applied. -
Page 19: Disposal Of Product Or Parts
“Waste Disposal and Public Cleansing Law.” Maintenance Parts Maintenance parts or expendables for replacing worn or damaged parts are available by ordering to any local distributors of our representatives listed below. KOSO HAMMEL DAHL 253 Pleasant Street W. Bridgewater MA 02379 Telephone: 774.517.5300 Fax: 774.517.5230...
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