User Guide

Fluid body
#7878-SS (stainless steel)
#7878 (hard-coated aluminum)
O-ring (Buna-N)
#7806
Nozzle air
cap retainer
#7819SS
(stainless steel)
O-ring
(Buna-N)
#4049
Packing
spring
#7808
Nozzle
O-ring
(Viton)
#7825
Air cylinder body
#7879-SS
(stainless steel)
#7879
(hard-coated aluminum)
Needle
packing
assembly
#7810
Nozzle/air cap
Round Fan
#7857-46SS #7857F-46SS
#7857-28SS #7857F-28SS
#7857-14SS #7857F-14SS
#7857-46WA-SS #7857-46WF-SS
Screws
H6-32X3/8SHC
Retaining
washer #7807
Fluid inlet fitting
#7543BP - for .25" OD tube
#7610BP - for .375" OD tube
2
3
4
5
11
Valve maintenance
To thoroughly clean the fluid body and
replace needle packings:
1. Remove needle stroke control knob
and spring.
2. Remove air cap retainer, then air
cap, nozzle and fittings.
3. Remove fluid body from air cylinder
body using a .11” hex wrench, then
remove O-ring.
4. Clean fluid body, air cap and nozzle
in appropriate solvent.
5. Use extraction tool #7803
to remove needle packings
from fluid body.
6. Remove any remaining pack-
ings and spring from needle.
Note: Before reassembling,
clean fluid body, air cap and
nozzle in appropriate solvent and
replace O-ring. Clean needle with
cloth dampened in solvent.
Reassemble the valve in reverse
order of disassembly. Ensure that
the small O-ring and washer on
the bottom of the air cylinder body
are back in place before reinstalling
the packing spring. Lubricate parts
indicated with Nye Lubricant #865
included in the Maintenance Kit.
Valve Disassembly and
Reassembly Procedures
CAUTION: To prevent damage, the valve
must be disassembled starting at the fluid
outlet end of the valve.
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Sales and service of EFD dispensing systems are available worldwide.