Post-Discharge Maintenance
06-237619-001 7-9 April 2020
7-6.4.4 Plain Nut Discharge Head Inspection and Service
Note: After every discharge, certain components in the Plain Nut Discharge Head assembly
must be inspected and serviced before recommissioning the Nitrogen Driver cylinder.
Part numbers for the items which may require replacement are listed in Table 7-4.
1. Remove top cap using a suitable wrench.
2. Remove and replace the packing O-ring (P/N WF-209180-000).
3. Lubricate packing O-ring (P/N WF-209180-000) and reinstall top cap. Tighten to 25 to 50
ft. lb. (35 to 70 N-m).
4. Replace inner and outer packing O-ring (P/N WK-242466-000 and WK-242467-000 respec-
tively) located concentrically on the bottom of the discharge head body.
5. Apply lubricant to both O-rings prior to attaching to I-valve (refer to Table 7-5 for lubricant
recommendations).
Figure 7-4. Plain Nut Discharge Head
Table 7-4. Discharge Head Replacement Part Numbers
Part Number Description Qty.
WK-242466-000 Outer Packing O-ring 1
WK-242467-000 Inner Packing O-ring 1
WF-209180-000 Packing O-ring, Top Cap 1
Table 7-5. Recommended Lubricants
Other Materials Description
Lubricant Parker Seal Co. Super-O-Lube or equivalent
3.81"
(97 mm)
PISTON
BALL
RETAINER
BALL
CHECK
SPRING
DISCHARGE
OUTLET
3/4" NPS
2 1/2 - 14N-3
OUTER O-RING
P/N WK-242466-000
INNER 0-RING
P/N WK-242467-000
STEM
SWIVEL NUT
(FOR CONNECTION
TO CYLINDER VALVE)
(100 mm)
3.94"
SET
OPERATED
POSITION
POSITION
STOP
CHECK
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