Spirax Sarco APT10-2, Installation And Maintenance Instructions Manual, Page: 24 / 32

IM-P612-18 ST Issue 3
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8. Replacement of spares (2)
Important - safety note
Before any installation or maintenance procedure, ensure that all steam or condensate
lines are isolated.
Ensure any residual internal pressure in the product or connecting lines is carefully
relieved. Also ensure any hot parts have cooled to prevent risk of injury from burns.
Always wear appropriate safety clothing before carrying out any installation or maintenance
work.
Always use suitable lifting gear and ensure the product is safely secured.
When dismantling this product, care should be taken to prevent injury from the snap
action mechanism.
Always handle with care.
Section 8. covers the replacement of the following spares:-
trap and outlet check valve mechanism
and steam inlet /exhaust valves and seats.
8.1 Replacement of trap and outlet check valve mechanism
Please ensure the safety recommendations are observed before commencing with
any maintenance of this product.
Tools required
19 mm A / F socket, 24 mm A / F socket, Flat blade screw driver, Torque wrench, Long nose pliers.
To fit the new trap and outlet check valve mechanism
1. Disconnect all connections to the cover. Remove the cover bolts using a 19 mm A /F socket,
then carefully slide the cover assembly away from the body (225 mm minimum withdrawal
distance will be needed). Lift the cover assembly to a bench or other convenient working
surface and clamp securely, avoiding contact with the gasket face.
2. Gently remove used gasket material from the body and cover being careful not to damage
the gasket sealing faces.
3. Carefully fit a new gasket (item 2) into the existing body.
4. Remove split pin, washer and shaft from the trap pivot (Z) (See Fig. 22).
5. Remove trap valve stem (item 22) from the mechanism.
6. The float and lever (items 5, 6) can now be swung up out of the way leaving access to the
trap and check valve assembly.
7. Using the 24 mm A / F socket unscrew the trap and check valve housing (item 9).
8. The whole trap and check valve assembly can now be carefully withdrawn from the cover.
9. There are no serviceable parts within this assembly; the replacement spares kit contains
all new parts.
10. Before fitting a new mechanism, clean the trap housing bore within the cover ensuring any
sludge or scale is carefully removed. Remember to fit a new gasket (item 23).