Parr Instrument A177VB2 - Manual (Page 3)

Bottom Drain Valve Model A177VB2
w w w . p a r r i n s t . c o m 3
Lubrication of the Bottom Drain Valve
Lubrication of the straight threads should be done
with a nickel based high temperature thread lu-
bricant. If SD2520SC10 shoulder bolt is removed,
re-install into plunger with semi-permanent thread
locker. Lubricate all other internal and outer straight
threads on the valve body, retainers, and plunger.
A177VB2
511VB5*
SEAL 1
1" NPS REF
692VBKL
SEAL 2 (FRONT)
SD2520SC10
1/4-28 X .375 SHSB
SEAL 2 (BACK)
5/16-18 X 3/4 FHSCS
3720HC
PLUNGER TIP
3723HC*
STANDOFF
3724HC*
VALVE BODY
3555HC
(3) TB3118FS12
(3) TB3118SC16
SCREW SHAFT
SCREW SHAFT
(3) 3719HC
RETAINER
JAM NUT
3/4-10
SLEEVE
3722HC*
5/16-18 X 1.00 SHCS
692VBHA
RETAINER
3721HC
PLUNGER BASE
3725HC*
RETAINING CAP
3556HC
3718HC
3554HC
SHIM
3/8 NPT
REF
*Available in other alloys
The frequency of lubrication depends on the amount
of use the valve receives. If the valve sits for a long
period of time (one or more months), it should be
lubricated before use. If the valve is used daily, then
lubrication may be required once a week.
Applications that include operating temperatures of
250°C and above will require more frequent lubrica-
tion of the valve threads.