What will you check during Safety valve inspection?

1.         Valve & valve seat:

·         Visual check for scoring, hairline crack.

·         Mating surface check (use passion blue continuous ring).

2.      Spindle :

·         Straightness / trueness /bending.

·         Corrosion,pitting,wear down.

3. Spring:

·         Natural length (when new), L_n

·         Free length ( when used), L_f, L_f      > 0.95 L_n

·         Distortion, perpendicularness.

4. Body:

·         Corrosion,pitting, crack.

5.      Drain passage :

·         Must be clean.

6.      Easing gear:

·         Wire condition, pulley, no destruction, & properly greased.