Market Forge Industries STM-EX Operations Instructions download pdf (Page 26)

SECTION 5 ASSEMBLY

TO REPLACE A THERMOSTATIC ELEMENT

1. Remove the cap of the steam trap (turn it counter-clockwise).

2. Unscrew the diaphragm and seat and discard.

3. Wipe all dirt and scale from the inside of the steam trap.

4. Place a new diaphragm and seat securely into the stea trap and replace the cap (New

Style - Part No. 98-1719).

THE STEAM TRAP

The Steam Trap has the very important automatic, dual function of exhausting all air from the

sterilizing compartment, and of making a suitable seal to allow a pressure build-up of live

steam during a cycle of sterilization. Also, a slot is milled at an angle through the seat to

allow a constant bleed-off of a slight amount of steam during the cycle to completely

eliminate any air pockets in the cylinder (see 'A' in figure) Failure of the trap to operate

properly will result in an uneven distribution of live steam within the compartment.

HOW IT WORKS

With the introduction of steam into the sterilizing compartment, cold air will escape. When

sufficient generated steam displaces the cold air, it will then start to exhaust through the

steam trap to heat the thermostatic element. The expansion of the thermostatic element will

make a seal against the seat to enclose the live steam within the sterilizing compartment and

a steam pressure build-up will occur.

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Market Forge Industries STM-EX Operations Instructions Page 26