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TLV CV-COSR, Инструкция по эксплуатации

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172-65587MA-02  (CV-COSR  Pneumatic  Control  Valve)    3  Jun  2019

 

12

 

Operational Check 

 

Before beginning steady operation, perform an operational check by following the 
steps outlined below: 

1. Close the shut-off valves on the CV-COSR inlets and outlets. Check operation 

without yet starting the flow of fluid (steam, water or air). 

2. Check to make sure the designated air pressure is being supplied to the pneumatic 

positioner. (Air pressure: 0.38 MPaG (54 psig)) 
NOTE: If the air supply pressure is incorrect, adjust it using an inlet air reducing valve. 
NOTE: If an air reducing valve is attached, check the reading on its pressure gauge. 

3. Turn on the power to the controller operation signal source, etc. (referred to 

hereinafter as the controller). 

4. Set the operation signal output from the controller to the CV-COSR to 0% (4 mA). 
5. Check the CV-COSR valve travel and the actuator air supply pressure. 

Valve Travel: Fully closed (valve travel 0%) 
Air Pressure: 0 MPaG (check the pressure gauge on the pneumatic positioner for 
the air pressure) 

NOTE: If the air pressure is not 0 MPaG (0 psig), refer to the "Adjusting the Zero/ 

Span" section of this product Instruction Manual and adjust the zero.   

6. Set the controller operation signal to 100% (20 mA). 
7. Check the CV-COSR valve travel and the actuator air supply pressure. 

Valve Travel: Fully open (valve travel 100%) 
Air Pressure: Approximately 0.38 MPaG (54 psig) (check the pressure gauge on 
the pneumatic positioner for the air pressure) 

NOTE: If the valve travel differs widely from 100%, refer to the "Adjusting the 

Zero/Span" section of this product Instruction Manual and re-adjust the 
span and the zero. 

NOTE: If the control valve does not move from the fully closed position, check to 

see if the wires for the controller and control valve have any breaks, short-
circuits, or have their polarity reversed (+ and 

– are reversed). 

8. Set the controller operation signal to 50% (12 mA). 
9. Make sure valve travel is smooth and without vibration. 

NOTE: If the valve is vibrating vertically, it may be being caused by noise on the 

signal wiring. Check to see if there is a possible source of noise nearby. 

 

Actuator Air Supply Pressure

Positioner Air Supply 
Pressure Gauge

Valve Travel Gauge

 

 

Содержание CV-COSR

Страница 1: ...172 65587MA 02 CV COSR Pneumatic Control Valve 3 June 2019 Pneumatic Control Valve CV COSR Copyright 2019 by TLV CO LTD All rights reserved ...

Страница 2: ...lve 3 Jun 2019 1 Contents Introduction 2 Safety Considerations 3 Specifications 5 Configuration 7 Installation 8 Electrical Wiring 11 Operational Check 12 Maintenance 14 Disassembly Reassembly 15 Troubleshooting 19 Product Warranty 21 Options 22 ...

Страница 3: ...he product properly This product employs an integrated positioner diaphragm type actuator with no lever making it very compact In addition a threaded condensate drainage port is provided at the bottom of the body to allow installation of a blow valve or steam air trap in order to eliminate condensate flowing in the piping contributing to prevention of valve seat erosion and rapid start up of the e...

Страница 4: ...tuation which poses a threat of death or serious injury WARNING Indicates that there is a potential threat of death or serious injury CAUTION Indicates that there is a possibility of injury or equipment product damage CAUTION 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 ...

Страница 5: ...er conditions in which 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 le...

Страница 6: ...ature 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 Nameplate layout depends on product specifications Actuator Pneumatic Positioner Actuator Area 120 cm2 18 6 in2 Operation Air to Open Reverse Action Air Supply Connection Port Pneumatic positioner body G1 4 with ad...

Страница 7: ...em Valve Seat Material Stainless steel Valve Characteristic Equal percentage Stroke Travel 15 mm 9 16 in Rangeability 50 1 Cv and Kvs Values Cv US 3 5 6 0 9 0 27 40 Cv UK 2 9 5 0 7 5 23 33 Kvs DIN 3 0 5 1 7 7 23 34 Valve Leakage Rate Leak Rate Class Less than 0 01 of the rated Cv and Kvs value IEC ANSI EN Class IV Condensate Drainage Port Rc PT 1 2 BSPT1 2 or NPT1 2 1 MPa 10 197 kg cm2 Do not use ...

Страница 8: ...et 22 Nameplate 23 Gasket 24 Bolt 25 Nut 26 Stem Bracket Connector Plate Set 27 Drain Plug Size 40 50 mm No Part Name M R 1 Actuator Body 2 Pressure Gauge 3 Bushing 4 Specifications Sticker 5 Guide Bushing 6 Valve Bonnet Nut 7 Valve Bonnet 8 Stuffing Box V rings 9 Stuffing Box Washer 10 Stuffing Box Spring 11 Valve Plug Stem 12 Valve Bonnet Gasket 13 Bolt 14 Flange 15 Valve Bonnet Guide 16 Valve B...

Страница 9: ...e 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 CV COSR unit be sure to blow down all piping thoroughly If this is not possible perform a blowdown using the bypass valve Blowdown is especially important for newly installed piping or after the system has bee...

Страница 10: ...alves The bypass pipe should be at least 1 2 of the size of the inlet primary side pipe 8 Installation Environment Check the installation environment to make sure that the ambient temperature does not exceed the actuator ambient temperature limit and that no corrosive gasses are present 9 Shut off Valve Installation Though the CV COSR adequately performs the function of a shut off valve initially ...

Страница 11: ...re connecting the air lines for the motive air that is to be piped to the actuator blow out the air in the lines to purge any dirt foreign matter oil or water from inside of the piping 14 Quality of Motive Air Supply to the actuator only clean air that does not contain water oil or foreign matter To prevent malfunction due to contamination of the air supply installation of the optional air filter ...

Страница 12: ...ul not to lose the rubber gasket 5 3 Insert a screwdriver into the notch 4 in the terminal plug 3 and remove the terminal plug 3 from the plug connector case 2 4 Insert the input signal wiring through the wiring connection port 6 and connect the wiring to the 1 2 and ground terminals at the symbols imprinted on the terminal plug 3 taking care not to reverse the polarity 5 Reinsert the connected te...

Страница 13: ...tioner for the air pressure NOTE If the air pressure is not 0 MPaG 0 psig refer to the Adjusting the Zero Span section of this product Instruction Manual and adjust the zero 6 Set the controller operation signal to 100 20 mA 7 Check the CV COSR valve travel and the actuator air supply pressure Valve Travel Fully open valve travel 100 Air Pressure Approximately 0 38 MPaG 54 psig check the pressure ...

Страница 14: ... to begin to open earlier 7 Change the operation signal to 4 1 mA 1 and check to make sure the valve begins to open 8 Change the operation signal to 4 mA 0 and check to make sure the valve is completely closed the actuator pressure gauge is completely at zero 9 Change the operation signal to 20 mA 100 and make sure that the stroke indicator reads in the vicinity of 100 If it does not use a precisi...

Страница 15: ...en 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 area Visual inspection is fluid leaking from the gap between the gland and the valve stem or are there signs it ...

Страница 16: ...urrent generator or a controller for input of an operation signal of 4 to 20 mA Removing Reattaching the Stem Bracket Plates Part During Disassembly During Reassembly Set the actuator air supply pressure to 0 MPaG 0 psig to maintain the valve in the fully closed position Set the actuator air supply pressure to 0 MPaG 0 psig to maintain the valve in the fully closed position Check to make sure the ...

Страница 17: ...e Valve Bonnet Guide Pull up and off being careful not to damage the valve plug stem or valve seat The difference between the inner diameter of the body and the outer diameter of the valve bonnet guide is very small so make sure that it does not tilt and get caught when pulling the valve bonnet guide up and off Reattach being careful not to damage the valve plug stem or valve seat The difference b...

Страница 18: ... of the body piping connected to the steam air trap or the blow valve should be removed 15 25 mm 40 50 mm Body Cover Plug Gasket Cover Plug Cover Cover Bolt Drain Plug Disassembling Reassembling the Gland and its Components In the procedure below first partially loosen the guide bushing and then remove the valve plug stem before removing the other parts The procedure is most easily performed if th...

Страница 19: ...n N m lbf ft mm in N m lbf ft mm in N m lbf ft mm in N m lbf ft mm in Bolts and Nuts for Stem Bracket Plates 7 5 1 8 5 16 7 5 1 8 5 16 7 5 1 8 5 16 7 5 1 8 5 16 7 5 1 8 5 16 Valve Bonnet Nut 150 72 36 113 32 150 72 36 113 32 150 72 36 113 32 150 72 36 113 32 150 72 36 113 32 Guide Bushing Valve Bonnet Section 120 88 24 15 16 120 88 24 15 16 120 88 24 15 16 120 88 24 15 16 120 88 24 15 16 Bolts for...

Страница 20: ... The valve plug and valve seat are off center Move the valve plug stem up and down and check to see if it catches Reassemble the valve bonnet section correctly There is a problem with the sealing surfaces of the valve plug and valve seat Check the valve plug and valve seat Replace with a new valve plug stem and valve seat The valve does not travel beyond a certain point The bellowphragm in the act...

Страница 21: ...ragm is cracked etc Check to see if any unusual noise is coming from the positioner Replace with a new positioner actuator unit Check to make sure that the valve is not operating traveling too often and that the ambient temperature is not too high There is water or oil inside the positioner Check to see if there is water or oil entrained in the supply air check to see if the humidity at the contro...

Страница 22: ... due to improper installation use handling etc by other than TLV CO LTD authorized service representatives 2 Malfunctions due to dirt scale rust etc 3 Malfunctions due to improper disassembly and reassembly or inadequate inspection and maintenance by other than TLV CO LTD authorized service representatives 4 Malfunctions due to disasters or forces of nature 5 Accidents or malfunctions due to any o...

Страница 23: ...tlets Failure to do so may result in burns or other injury from the discharge of fluids CAUTION The following options are available to meet individual specification requirements so please verify your particular product Actuator Unit Option Section B With Filter Regulator With Mist Separator Filter Regulator Manual Condensate Discharge Manual Condensate Discharge Rc PT 1 4 BSPT1 4 NPT1 4 Rc PT 1 4 ...

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