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DV-1/4 Turn IOM - 11/06
2.3 The valve position is visible based on the position
of the groove at the end of the input shaft and lock
plate as shown below.
2.4 The valve shall lock itself in the open or closed
position. If a secondary lock is desired in the open or
closed position, a pin, tie-wrap or other suitable
securing device may be placed thru the locking plate’s
and bonnet half’s ¼” (6.35 mm) thru hole.
3.0 MAINTENANCE
ALL MAINTENANCE PROCEDURES MUST BE
PERFORMED BY QUALIFIED PERSONNEL.
MAINTENANCE DONE BY PERSONNEL NOT
QUALIFIED TO PERFORM IT COULD RESULT IN
PERSONAL INJURY, DEATH OR PROERTY
DAMAGE.
s
!
WARNING
Remove all line pressure.
3.1 PERIODIC INSPECTION
s
!
WARNING
When the process fluid is hazardous or
corrosive, extra precautions should be taken.
The user should employ appropriate safety
devices and should be prepared to control a
leak of the process fluid. Failure to follow these
instructions could result in serious personal
injury or death, and property damage.
Periodically inspect condition of external valve parts.
Replace all parts showing excessive wear or
corrosion. Contact manufacturer at the address listed
on the back page of this manual in order to obtain
replacement parts or for specific instructions.
3.2 BONNET TO BODY INTERFACE LEAKAGE
If leakage occurs at the body/diaphragm seating area,
immediately depressurize system, open valve slightly
and tighten nuts per Section 1.1.4. If leakage
continues, diaphragm replacement is required per
Section 3.6.
3.3 BONNET ASSEMBLY LEAKAGE
If leakage is occurring thru the bonnet assembly the
diaphragm has ruptured and must be replaced per
Section 3.6.