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IOM D-040

5.3. Second Stage Maintenance

Perform if the first stage doesn't solve the leak, if one of

the seals or inner parts need replacement or for periodic

maintenance to thoroughly clean the valve.

5.3.1. Releasing Pressure

• Shut the isolating valve located on the riser under the air valve

• Carefully release the pressure and drain the air valve

• Important: Discard liquid to comply with local regulations

5.3.2. Removal of the Air Valve Body

• Slowly turn the Body (1) counterclockwise, and

remove it [2]

• Remove the Discharge Outlet Elbow [3], [4] (snap-on

or thread)

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ARI D-040 Specifications

General