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Original document - Mi-205 EN Edition: 2021-04
6.7.1 Setting of the “closed” position with type MTV
1. Connect compressed air via a pressure reduction valve. Adjust the pressure to 3 bar.
2. Operate the valve to test. Leave it in the closed position.
3. If the valve is not mounted in the pipe line, make a visual check the disc edge
is in contact with the seat.
4. If the valve is mounted in the pipe line, check for leakage across closed valve.
5. The design of the valve is such that increased surface pressure between seat
and disc will reduce leakage. Do not increase surface pressure more than
necessary.
6. If the points 4 or 5 above require some action please see procedure below.
Procedure
1. Loosen the nut of the end position bolt (
➔ Fig.6-8/2) and turn the end position
bolt 0.25 turns counterclockwise.
2. Repeat point 2 above.
3. Repeat point 3 alternative 4 above.
4. When the set-up is correct, apply sealing tape and tighten the lock nut.
5. If the valve is outside the pipe line is preferable to make a leakage test
(Chap. 6.9).
6.7.2 Setting of the “open” position with type MTV
1. Connect compressed air via a pressure reducing valve 4-5,5 bar depending on
actuator specification.
2. Operate the valve to test.
3. Check if the valve opens to the desired position.
In case of shut off/on application the max. opening angle of the butterfly valve is about 80°.
In case of control application the max. opening angle is about 60°-80°.
Procedure
1. If the butterfly does not reach the position, loosen the lock nut of the end
position bolt and turn the end position bolt (
➔ Fig.6-8/1) 1-2 turns
counterclockwise.
2. If the butterfly rides over the position, loosen the lock nut of the end position
bolt and turn the end position bolt (
➔ Fig.6-8/1) 1-2 turns clockwise.
3. Operate the valve to test.
4. When the correct setting is reached, attach thread seal tape and tighten the locknut.
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