Removal procedure
Removal: Exhaust shutter
• Attach to the power chamber of the exhaust shutter.
• Apply some load to the exhaust shutter using to remove the shutter.
Installation procedure
Installation: Exhaust shutter
• Attach to the power chamber of the exhaust shutter.
• Apply some load to the exhaust shutter using to install the shutter.
Installation: Front pipe
• Install the front pipe so that the amounts of offset in both vertical and horizontal directions between the pipes in front of and behind the bellows are within the specified value.
Inspection procedure
Inspection: Exhaust shutter
(1) Air tightness of power chamber
• Apply the negative pressure for inspection to the power chamber using.
• After elapse of 15 seconds, check that the vacuum gauge reading meets with the specified value.
• If the measurement deviates from the standard value, replace the exhaust shutter.
(2) Clearance between butterfly valve and body (average clearance between top and bottom)
(2.1) When the butterfly valve is fully closed
• Apply the negative pressure for inspection to the power chamber. Measure the clearance between the butterfly valve and body at the top A and that at the bottom B with the butterfly valve fully closed. Calculate the average clearance.
• If the measurement deviates from the standard value, replace the exhaust shutter.
(2.2) When the butterfly valve is fully opened
• Check to ensure that there is no clearance between the lever and adjusting bolt and that the butterfly valve is kept fully open.
• If there is any abnormality, replace the exhaust shutter.
(2.3) When the butterfly valve is half closed
• Apply the negative pressure for inspection to the power chamber. Measure the clearance between the butterfly valve and body at the top A and that at the bottom B with the butterfly valve half closed. Calculate the average clearance.
• If the measurement deviates from the standard value, replace the exhaust shutter.
(3) Inspection of body inside
• Check that the body inside is not sooted.
• Clean the body if any soot accumulation is found.
