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172-65742MA-01 (CT20/CT20D) 7 Oct 2021

12

Detaching/Reattaching the Stem Connector Nut and Locknut

Part

During Disassembly

During Reassembly

Locknut,
Stem Connector
Nut

Loosen the locknut by holding the
stem connector nut with a
spanner
DO NOT disassemble with the
valve plug in contact with the valve
seat, make sure that the valve plug
is slightly suspended

Do not supply air to the actuator at
a pressure of 0.6 MPaG (85 psig, 6
barg) or more.
Consult the table of tightening
torques and tighten to the proper
torque
If the instructions given are not
followed when reassembly is
carried out, malfunctions such as
insufficient lift (insufficient flow
capacity) and/or insufficient closing
force (valve leakage) may result:
give the proper attention to the
adjustment procedure

Stem Connector Nut

Locknut

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Содержание CT20

Страница 1: ...172 65742MA 01 CT20 CT20D 7 October 2021 Electro Pneumatic Control Valve CT20 CT20D for Valve Unit Copyright 2021 by TLV CO LTD All rights reserved ...

Страница 2: ... to make sure nothing is out of the ordinary Also be sure to read this manual carefully before use and follow the instructions to be sure of using the product properly If detailed instructions for special order specifications or options not contained in this manual are required please contact TLV for full details This instruction manual is intended for use with the model s listed on the front cove...

Страница 3: ...hreat of death or serious injury Indicates that there is a possibility of injury or equipment product damage Install properly and DO NOT use this product outside the recommended operating pressure temperature and other specification ranges Improper use may result in such hazards as damage to the product or malfunctions that may lead to serious accidents Local regulations may restrict the use of th...

Страница 4: ...ich no water hammer will occur The impact of water hammer may damage the product leading to fluid discharge which may cause burns or other injury Make sure the power supply is OFF before carrying out work on the wiring or inspections involving disassembly If such work is carried out with the power on there is a danger that equipment may malfunction or electric shock may occur leading to injury or ...

Страница 5: ...the product nameplate for detailed specifications Valve Section Actuator Section Maximum allowable pressure PMA and maximum allowable temperature TMA are PRESSURE SHELL DESIGN CONDITIONS NOT OPERATING CONDITIONS Valve No is displayed for products with options This item is omitted from the nameplate when there are no options Model Nominal Diameter Maximum Allowable Pressure Maximum Operating Pressu...

Страница 6: ...pring 9 Valve Plug Stem 10 Valve Bonnet Gasket 11 Bolt 12 Nut 13 Valve Seat 14 Nameplate Valve Section front Actuator Section back 15 Travel Indicator Scale 16 Stem Bracket Clamps 17 Drain Plug 18 Actuator Stem 19 Fixing Nut Replacement parts are available only in the following kits M Maintenance Kit R Repair Kit Actuator Section Positioner Section Valve Section Eye Bolt Actuator area 700 cm2 1 08...

Страница 7: ...ug Stem 10 Valve Bonnet Gasket 11 Valve Bonnet Bolt 12 Valve Bonnet Nut 13 Valve Seat 14 Nameplate Valve Section front Actuator Section back 15 Travel Indicator Scale 16 Stem Bracket Clamps 17 Drain Plug 18 Actuator Stem 19 Fixing Nut Replacement parts are available only in the following kits M Maintenance Kit R Repair Kit Actuator Section Positioner Section Valve Section Eye Bolt Actuator area 70...

Страница 8: ...rns or other injury CAUTION Installation inspection maintenance repairs disassembly and adjustment and valve opening closing should be carried out only by trained maintenance personnel Check to make sure that the piping where the product is to be installed is constructed properly If the piping is not correctly constructed the valve may not perform optimally 1 Blowdown Before installing the product...

Страница 9: ...20 CT20D 7 Maintenance space Leave sufficient space for maintenance inspection and repair Units mm in CT20 CT20D 8 Drainage port usage example The threaded condensate drainage port at the bottom of the body makes possible installation of a blow valve or steam air trap Because the condensate drainage port is located on the primary side of the product condensate flowing in the primary side piping ca...

Страница 10: ...ion Leakage from valve when the valve is closed Visual inspection or stethoscope inspection is the outlet side pressure or temperature elevated or is there the sound of the medium flowing Adjust the zero span if that does not solve the problem replace with a new valve plug stem and valve seat Leakage from gland section Visual inspection is fluid leaking from the gap between the guide bushing and t...

Страница 11: ...maintenance repairs disassembly adjustment and valve opening closing should be carried out only by trained maintenance personnel For details of the actuator and the electro pneumatic digital positioner refer to the respective instruction manuals issued by the manufacturer NOTE Be sure to coat all threaded portions of the valve seat and bolts with anti seize Removing Reattaching the Actuator Positi...

Страница 12: ...lve seat make sure that the valve plug is slightly suspended Do not supply air to the actuator at a pressure of 0 6 MPaG 85 psig 6 barg or more Consult the table of tightening torques and tighten to the proper torque If the instructions given are not followed when reassembly is carried out malfunctions such as insufficient lift insufficient flow capacity and or insufficient closing force valve lea...

Страница 13: ...l descend Fig 3 NOTE Be careful not to pinch your fingers 4 Turn the stem connector nut until it comes into contact with the actuator stem and turn the stem connector nut a further 1 4 turn to contact the actuator stem Make sure that the valve plug is seated in the valve seat Hold the stem connector nut with a spanner and tighten the locknut with a proper torque Fig 4 5 Shut off the air supply to ...

Страница 14: ...m connector nut a further 1 4 turn to contact the actuator stem Make sure that the valve plug is seated in the valve seat Hold the stem connector nut securely in place with a tool such as a spanner and tighten the locknut Fig 4 5 Shut off the air supply to the actuator NOTE Be careful not to pinch your fingers 6 Secure the stem connector nut and the actuator stem with the stem bracket clamps Make ...

Страница 15: ...sembly During Reassembly Guide Bushing Remove with a socket wrench Consult the table of tightening torques and tighten to the proper torque Stuffing Box V ring Packing Pull up and out Make sure to reassemble the V ring packing in the proper orientation coat the groove with heat resistant silicon grease reattach the V ring packing with the grooves facing downward Stuffing Box Washer Stuffing Box Sp...

Страница 16: ... Reattach being careful not to damage the valve plug or valve seat insert the bonnet securely into the gasket housing without tilting check to make sure that there is no catching or biting when the valve plug is seated in the valve seat and that the valve plug is securely seated in the valve seat Valve Bonnet Gasket Remove the gasket and clean sealing surfaces Replace with a new gasket make sure t...

Страница 17: ...r Cv values of 30 or greater When the Cv value is 20 or less there is no designated reassembly orientation Cv Value 20 or less Cv Value 30 or more Valve Plug Viewed from side Valve Plug Viewed from bottom Removing Reinserting the Valve Seat Special tool required Part During Disassembly During Reassembly Valve Seat This procedure requires a special tool contact TLV for details Over tightening could...

Страница 18: ...g Nut 15 to 150 1 2 to 6 150 110 Special tool required 2 Stem Connector Nut Locknut 15 to 80 1 2 to 3 50 37 16 17 1 5 8 21 32 1 100 150 4 6 120 88 24 15 16 Stem Bracket Bolt 240 cm2 3 0 37 in2 3 5 4 8 5 16 350 cm2 3 0 54 in2 3 9 6 5 9 11 32 700 cm2 3 1 08 in2 3 9 6 5 9 11 32 Drain Plug 4 15 to 150 1 2 to 6 50 37 1 Size depends on bolt specifications 1 N m 10 kg cm 2 Contact TLV for details 3 Actua...

Страница 19: ...ng Nut Drain Plug Body Valve Bonnet Gasket Valve Seat Bolt Locknut Stem Connector Nut Travel Indicator Scale Valve Bonnet Front Model size date of manufacture Back Spring range Cv value etc Nameplate The shape of the plug differs depend on the size and the Cv value Valve Plug Stem A special tool is required for disassembly reassembly ...

Страница 20: ...of the air supply for the positioner to match the pressure in the product specifications Refer to the instruction manual for the positioner for zero point adjustment The positioner s zero point is miscalibrated Check the actuator air supply pressure on the positioner s pressure gauge when the operation signal is at zero point If the pressure on the pressure gauge is elevated adjust the positioner ...

Страница 21: ...e or Acts of God or 5 abuse abnormal use accidents or any other cause beyond the control of TLV TII or TLV group companies or 6 improper storage maintenance or repair or 7 operation of the Products not in accordance with instructions issued with the Products or with accepted industry practices or 8 use for a purpose or in a manner for which the Products were not intended or 9 use of the Products i...

Страница 22: ...ENTIAL DAMAGES INCLUDING BUT NOT LIMITED TO LOST PROFITS THE COST OF DISASSEMBLY AND SHIPMENT OF THE DEFECTIVE PRODUCT INJURY TO OTHER PROPERTY DAMAGE TO BUYER S OR THE FIRST END USER S PRODUCT DAMAGE TO BUYER S OR THE FIRST END USER S PROCESSES LOSS OF USE OR OTHER COMMERCIAL LOSSES WHERE DUE TO OPERATION OF LAW CONSEQUENTIAL AND INCIDENTAL DAMAGES UNDER THIS WARRANTY UNDER ANY OTHER EXPRESS WARR...

Страница 23: ...Road Nunawading Victoria 3131 Australia Tel Fax 61 0 3 9873 5610 61 0 3 9873 5010 In East Asia 36 Kaki Bukit Place 02 01 02 Singapore 416214 Tel Fax 65 6747 4600 65 6742 0345 Room 5406 No 103 Cao Bao Road Shanghai China 200233 Tel Fax 86 0 21 6482 8622 86 0 21 6482 8623 No 16 Jalan MJ14 Taman Industri Meranti Jaya 47120 Puchong Selangor Malaysia Tel Fax 60 3 8065 2928 60 3 8065 2923 252 94 K L 17t...

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