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Azbil VDD Series, User Manual

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Azbil VDD Series User Manual Download Page 27

Azbil Corporation 

13

Chapter 5: Main Parts to be Replaced

Parts of this control valve can be used for a long period of time, but the following 
parts should be replaced at every periodic inspection.

 Valve body section

O-rings:    

Every five years

Diaphragm:  

Every year

 Actuator

•  Diaphragm:  

Every five years

•  Bushings:  

Every five years  

  

 

(HA2/3/4 only. For replacement, please contact us.)

•  Cap:    

Every five years

•  Seal washers:   Every five years (and whenever disassembling)
•  Dust seal:  

Every five years (and whenever disassembling)

•  Rod seal:  

Every five years (and whenever disassembling)

Summary of Contents for VDD Series

Page 1: ...OM2 8110 0530 Weir Diaphragm Control Valve Model VDD_ _ _ User s Manual...

Page 2: ...laims the implied warranties of merchantability and fitness for a particular purpose and makes no express warranties except as may be stated in its written agreement with and for its customer In no ev...

Page 3: ...t in death or serious injury CAUTION Cautions are indicated when mishandling this product may result in minor injury or property damage only In describing the product this manual uses the icons and co...

Page 4: ...wear safety shoes and watch your step During work wear protective goggles to prevent injury from flying objects and harm from chemicals During work wear protective gloves to prevent injury from burrs...

Page 5: ...rs install a fence or cover as a protective measure Do not install the valve where it may be submerged by rainwater covered with snow or subject to freezing Otherwise the valve might be damaged If the...

Page 6: ...id installing the valve where it will be subject to vibration or other external forces that may affect its performance Protective covers are attached to the flanges to protect the gasket contacting su...

Page 7: ...v Tighten evenly in a diagonal pattern Max weight...

Page 8: ...caused by pieces of tape may result in poor valve performance If liquid packing thread lock sealant is used for air supply piping work do not allow it to enter inside the pipes If it does poor valve...

Page 9: ...tc Otherwise the springs may jump out causing injury When removing the valve from the piping if the eyebolts eyenuts attached to the actuator are used to hoist the valve make sure that the weight does...

Page 10: ...viii Close valve Close valve Close Open Valve Pressure regulator No pressure No pressure Packing Gasket Follow the assembly procedure Replace the packing and gasket Tighten bolts to specified torque...

Page 11: ...acking gasket is attached to the cap of auxiliary equipment such as positioners Do not lose it during wiring work Take care not to lose screws for the cap of auxiliary equipment such as positioners Ma...

Page 12: ...amage etc When unpacking check that the following items are included The valve actuator and parts to be mounted Any auxiliary devices that you ordered z Checking the Specifications Check that the flui...

Page 13: ...ing the specifications cover it with a polyethylene protective sheet to keep rainwater out To store a valve that has been used follow the instructions below 1 Wash out any fluid stuck to or remaining...

Page 14: ...fter Installation and Precautions for Operation 4 Chapter 3 Maintenance and Inspection 5 Chapter 4 Disassembly and Assembly 7 4 1 Detaching the Actuator from the Valve Body 7 4 2 Disassembly and Assem...

Page 15: ...ody section consists of the valve body diaphragm spindle compressor bonnet etc The diaphragm controls the flow as it is driven vertically into or out of the weir section of the valve body by the actua...

Page 16: ...re and other major specifications of the control valve Check that the specifications indicated on the nameplate are appropriate for the application The nameplate also includes the product number PROD...

Page 17: ...tion on the Piping 1 Before installing the valve on the piping remove foreign matter scale welding spatter etc from both upstream and downstream sides of the pipe 2 Make sure that the gaskets do not p...

Page 18: ...rd 2 3 Inspection after Installation and Precautions for Operation 1 Check the air pipe connections for leakage before use 2 Make sure that the bolts and nuts of the diaphragm case etc are firmly tigh...

Page 19: ...chapter 4 Disassembly and Assembly Leaks of fluid from between the valve body and the bonnet Visual check check with effervescent liquid etc Release the fluid pressure and then retighten the screws to...

Page 20: ...with bonnet Unit N m Connection diameter inches Diaphragm material PTFE body material anything other than hard natural rubber Diaphragm material rubber natural rubber chloroprene EPDM 1 2 4 0 2 0 3 4...

Page 21: ...ke and lift and remove the actuator from the valve body 4 2 Disassembly and Assembly of the Valve Body Disassembly procedure 1 Remove the hex nuts from the bonnet using a wrench 2 Remove the bonnet sp...

Page 22: ...e 1 Valve body corrosion or wear of the wetted parts cracks on the lining 2 Diaphragm deterioration wear cracks 3 Spindle damage on the sliding parts Assembly procedure 1 Attach the diaphragm to the c...

Page 23: ...f the edge of the diaphragm Tighten the nuts evenly in a diagonal pattern using a wrench 4 For a PTFE diaphragm the valve body and the diaphragm will be sealed better if the bolts and nuts are tighten...

Page 24: ...Make sure that grease is not applied to the diaphragm 2 Before starting assembly check that there is no foreign matter on the diaphragm lining or weir section so that foreign matter will not be caught...

Page 25: ...the actuator stem moves in response This is a margin for stroke 6 Reduce the air pressure slightly and set the air pressure to the spring range upper limit again Then tighten the hex bolts that hold...

Page 26: ...200 Pneumatic single acting valve positioner model VPE document No OM2 8310 0410 Smart valve positioners Model AVP300 301 302 integrated type Model AVP200 201 202 remote type document No CM2 AVP300 20...

Page 27: ...riodic inspection Valve body section O rings Every five years Diaphragm Every year Actuator Diaphragm Every five years Bushings Every five years HA2 3 4 only For replacement please contact us Cap Ever...

Page 28: ...Azbil Corporation 14...

Page 29: ...Azbil Corporation 15 Chapter 6 Disposal If this device is no longer needed dispose of it appropriately as industrial waste in accordance with local regulations Do not reuse all or a part of the device...

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Page 32: ...o your use 3 Measures to be taken to secure the required level of the reliability and safety of your Equipment in your use Although azbil is constantly making efforts to improve the quality and reliab...

Page 33: ...argin of your machine or equipment you are required to renew any Azbil Corporation s products every 5 to 10 years unless otherwise specified in specifications or instruction manuals System products fi...

Page 34: ......

Page 35: ...Document Number Document Name OM2 8110 0530 Weir Type Diaphragm Control Valve Model VDD User s Manual Date 1st edition Nov 1988 4th edition Feb 2022 Issued Edited by Azbil Corporation...

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