Spirax Sarco Valve BSA3T PN25 DN200

Observe the data in Section 1 - 'Safety information'

Warning: Handle and dispose of body/bonnet collar gaskets (10a and 10b) carefully

Unscrew the main handwheel nut in a clockwise direction

Place a suitable spanner across the flats of the bonnet bush (2) and unscrew the handwheel

Apply Loctite 638 to the threads of the handwheel boss

Tighten the handwheel boss to 50 N m (36 lbf ft)

Observe the data in Section 1 - 'Safety information'

Warning: Handle and dispose of body/bonnet collar gaskets (10a and 10b) carefully

Ensure the valve is connected in the pipeline

Unscrew bonnet studs/nuts (9) to remove the valve bonnet (2) from the body (1)

Check if the body gasket (10b) is visible

Review Section 1 - 'Safety information' before starting maintenance

Handle and dispose of body/bonnet collar gaskets (10a and 10b) carefully to avoid injury

Remove the old stem pin and replace the disc (4)

Attach the new disc with the new stem pin (supplied)

If applicable, prise the crimped skirt away from the retaining nut and unscrew

Remove and save the collets and retaining nut for reuse

Lightly grease collets and threads with lubricating compound such as Molybdenum Sulphide

Pre-assembly Safety Information

Review Section 1 - 'Safety information'

Handle and dispose of body/bonnet collar gaskets (10a and 10b) carefully

Remove all old stem packing material from the bonnet cavity

Check that only one new stem packing ring is used

Fit a bellows collar gasket between the collar and the valve bonnet

Review Section 1 - 'Safety information' before starting the maintenance program.

Handle and dispose of body/bonnet collar gaskets (10a and 10b) carefully to avoid injury from the stainless steel support ring.

Fitting New Stem/Bellows Assembly

Fit a bellows collar gasket (10a) between the bellows support collar and valve bonnet (2).

Ensure the bellows collar gasket (10a) is accurately located.

Apply a small amount of lubricating compound to the end of the stem pin.

Ensure the stem pin is aligned with the slot inside the bonnet.

Carefully slide the stem up through the bonnet.