Spirax Sarco APT10-2, Инструкция по установке и обслуживанию

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IM-P612-18 ST Issue 3
18
7.2 Replacement of inlet swing check valve
Please ensure the safety recommendations are observed before commencing with
any maintenance of this product.
Tools required
19 mm A/F socket, 13 mm A/F socket, Flat blade screw driver, Torque wrench, Long nose pliers
To replace the inlet swing check valve
1. Remove the cover and old gasket (see cover gasket replacement procedure, Section 7.1).
2. Lift the cover assembly to a bench or other convenient working surface and clamp securely,
avoiding contact with the gasket face.
3. Carefully remove the circlip from the end of the steam inlet valve (item 17).
4. Remove the three M8 bolts that secure the pump mechanism bracket using the 13 mm A / F
socket.
5. Lift away the pump bracket assembly (See Fig. 17). This will allow access to the inlet swing
check valve (item 12).
Note: Do not allow the spring in the pump mechanism to bend back on itself as this
may damage the coils and shorten the life of the spring.
6. The swing check valve flap can now easily be withdrawn.
7. Fit a new flap, ensuring the face of the check valve flap and seat are clean and free from
damage.
8. Reassembly is the opposite to removal.
9. Tighten the three M8 bolts using the 13 mm A / F socket to 18 ± 2 N m (13 ± 1.5 lbf ft).
10. It is important to ensure a new circlip is refitted to the steam inlet valve.
11. With the mechanism fully assembled, refit the cover assembly to the body, ensuring the gasket
faces are carefully aligned and no parts of the gasket are trapped or pinched outside the
sealing areas.
12. Refit the cover bolts ensuring they are sequentially tightened in opposing pairs, gradually
increasing torque to 63 ± 5 N m (46.5 ± 4 lbf ft).
13. Carefully reconnect the motive steam supply and the exhaust lines to the connections
marked (S) and (E), and the condensate inlet and outlet to the connections marked (IN)
and (OUT). The APT10-2 is now ready to recommission.