Algas SDI TORREXX TX240, Operation & Maintenance Manual

Page: 31 / 93

ASDI Operations and Maintenance – TX Models – P/N: 54629
5-24
Liqui-SAFE Valve – Performance Check
I Latch operation. – While the valve is in the open position and the red flag is
down, press button and release QUICKLY. This will cause the valve to close
and the red flag should pop up. Carefully press the button again all the way
down and release SLOWLY. The valve will stay open with red flag down.
II Leak detection. – Follow the instructions in “I” to manually open and close the
valve. Perform leak tests in both conditions. If a leak is detected at the valve
body (Step 1) when the valve is open, replace the valve body O-ring (This
can be performed in the field. See below.) If a leak is detected in Step 2 (#5)
when the valve is closed (see Figure 10), follow the “Liqui-SAFE
TM
valve –
Service Instructions” and change all the O-rings. (This service should not be
performed in the field.)
Figure 10 – Steps to check Liqui-SAFE valve operation.
WARNING
Extreme caution must be taken due to the potential of flammable
vapors being exposed to the atmosphere creating an ignition. Do
not operate any equipment that may create a spark from this point.
Do not open the explosion-proof enclosure.
1. CHECK FOR LEAKS
(AT THE GAP)
STEP 1
STEP 2
STEP 3
2. PRESS AND RELEASE
QUICKLY TO CLOSE
3. CHECK FOR LEAKS
(AT PIPE THREADS)
4. CHECK FOR LEAKS
(AT VALVE THREADS)
6. PRESS AND RELEASE
SLOWLY TO RE-OPEN
5. CHECK FOR LEAKS
(AT THE GAP)
7. MAKE SURE VALVE FLAG
IS DOWN. VAVLE IS NOW IN
OPERATING POSITION