Donaldson Torit Dust Collector UMA 150V

Warning: This inspection requires trained personnel with PPE!

Enter the pressure differential across the filter assembly

Is the cleaning mechanism functioning properly?

Enter the filter resistance measured by U-tube manometer or differential-type pressure gauge

Is the filter resistance within the expected range?

Is the secondary or absolute filter monitor functioning properly?

Is the general casing integrity satisfactory?

Are door fastener threads lubricated?

Is the ignition minimising fan's lining inside the casing in good condition?

Isolate electrical controls and open fan and filter chamber access doors.

Fully slacken the four captive wing-nuts located in the fan chamber, on the top plate of venting type collectors or in the side outlet box.

With the aid of a colleague, withdraw the complete filter assembly through the front of the filter chamber.

Remove wire mesh insert frames from individual filter bags. Check for broken mesh and worn material edgings, especially around the area of any filter bag damage.

Detach filter bag assembly from supporting frame.

Fit new filter bag assembly into supporting frame, feeding individual filter bags between locating bars, and fold collar over peripheral sealing flange.

Prior to fitting wire mesh inserts, replace any material edgings that need replacing around the three edges of the insert that do not have the insert frame joint. Fit the inserts, edging first, into the filter bags.

With the aid of a colleague, slide filter assembly into the guides until bottom corners of filter bags make contact with the shaker bar.

Locate individual filter bags in shaker bar.

Pressure drop across the filter assembly

Record the figure in the log book

Pressure drop increased significantly over two or three successive checks?

Check the filter if pressure drop increased significantly

Pressure drop across the secondary or absolute filter

Change the filter when the pressure drop reaches 100 mm W.G.

Inspect the explosion relief assembly weekly

Ensure the bursting panels are intact and clear of obstruction

Prevent build-up of snow or ice on explosion panels during winter

Isolate electrical supply and remove fan chamber lid

Disconnect electrical wiring to terminal box

Remove the four bolts securing the motor drive bed-plate and withdraw the complete assembly from the unit case

Loosen, but do not remove, the four socket screws in the base flange and withdraw drive cover

Remove the six nuts securing flange of bearing housing to the bed-plate and withdraw the housing

Remove fan pulley and the six bolts securing the fan case

Remove fan impeller and fan case

Remove end caps and spacers from fan bearing housing

Warning: Ensure you are wearing appropriate PPE before starting the procedure.

Open secondary/absolute filter door.

UMA 40MM – Lift bar to release sealing mechanism.

UMA 100-450 – Undo clamping nuts or clips as appropriate and remove retaining mesh or frame.

UMA 750 – Undo clamping nuts sufficient to allow element removal.

Remove used element, place it directly into a plastic bag and then seal the bag.

Slide the new element into the housing, with the element seal against the secondary/absolute filter seal frame, until it reaches the backstop.

Clamp element in position using the arrangement provided.

Close secondary/absolute filter door.