Spirax Sarco BPT13

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IM-P122-02 CMGT Issue 11

BPT13 Balanced Pressure Thermostatic Steam Traps

6.3 How to clean or replace the strainer screen:

(BPT13AX / UAX / SX / USX)

Remove the cap (2) using a spanner.

Lift out the spring (5), capsule (4) and spacer plate (6).

Unscrew the valve seat (7).

Remove the strainer screen (9) and the seat gasket (8).

Fit a new seat gasket (8) and clean the strainer screen (9) before replacing or replace the strainer

screen with new.

Screw in a new valve seat (7). Use a small amount of anti-seize compound on the threads and tighten

to the recommended torque (see Table 1).

Drop in the new spacer plate (6) ensuring it is located centrally on the valve seat (7). Note: Early spacer

plates are unidirectional and must be tted with the highest points uppermost. This does not apply to

later models, which can be tted either way up.

Fit the new capsule (4) and spring (5) ensuring that the conical spring is positioned with the narrow end

pointing downwards in contact with the capsule.

Screw on the cap (2) using a new 'O' ring (3) assembled into the groove in the top of the cap, or in older

models using a new gasket. Note: The spares pack contains 2 sizes of 'O' ring, use of the correct 'O' ring

is explained in the note contained within the package. Tighten to the recommended torque (see Table 1).

Spirax Sarco BPT13 - Page 12