Spirax Sarco Valve BSA1T PN16 DN150-DN200

Review Section 1 - 'Safety information' before starting maintenance

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 stem packing ring is used from the spares kit

Align the solid stem pin with the slot inside the bonnet

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

Review Section 1 - 'Safety information'

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

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

Replace the visible body gasket (10b)

Ensure the gasket face in the body (1) is clean before fitting a replacement

Observe the data in Section 1 - 'Safety information' before starting maintenance

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)

Review Section 1 - 'Safety information' before proceeding

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

Stem/Bellows Assembly Installation

Fit a new stem/bellows assembly (6, 5) following the reverse order of removal

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

Review Section 1 - 'Safety information'

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)

Prise the crimped skirt away from the retaining nut and unscrew

Remove the collets and save them along with the retaining nut