Nordson EFD 752V-HL User manual

™
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752V-HL Dispense Gun
Operating Manual

752V-HL Dispense Gun
2www.nordsonefd.com [email protected] 800-556-3484 Sales and service of Nordson EFD dispensing systems are available worldwide.
Getting Started
1. Install the feed tube from the fluid reservoir to
the inlet fitting and tighten the compression nut
to secure. The location of the inlet fitting can
be changed by removing the two fluid body
retainer screws and fluid body. Follow the service
instructions to reinstall the fluid body with the inlet
fitting in the desired position.
2. Apply air pressure to the fluid reservoir. Start with
a low setting of 1.4 bar (20 psi). If using an EFD
fluid reservoir, refer to the User’s Guide for further
instructions.
Introduction
The 752V-HL (#7021415) hand-operated dispense gun is a rugged, industrial, lever-actuated fluid dispensing valve.
The valve incorporates a quick change fluid body for fast and easy maintenance. The fluid inlet fitting for 1/4" OD
feed tubing and an assortment of dispensing tips are included.
Typical System Setup
3. Install an appropriate size dispensing tip on
the outlet tip adapter. Use large tips for high
viscosity materials and small tips for low viscosity
materials.
4. Press the hand lever to begin fluid flow. Release
the lever to stop fluid flow.
5. To achieve the desired flow, change the size of
the dispensing tip or adjust the reservoir fluid
pressure.
#7020105
Hand-lever
valve stand
#7010004
1.0 liter tank
accommodates a one
pound bottle
#7002002
5-micron filter/regulator for
clean, dry filtered factory air
For dispensing with
cyanoacrylates, order #7016548
with coalescing filter.
Shutoff valve

752V-HL Dispense Gun
3www.nordsonefd.com [email protected] 800-556-3484 Sales and service of Nordson EFD dispensing systems are available worldwide.
Tools required:
7/64" hex wrench
1/8" flat tip screwdriver
Snap ring pliers (customer-supplied)
6" adjustable wrench (customer-supplied)
Service
Check the reservoir pressure gauge prior to
performing any maintenance to ensure that the
pressure is zero (0). To confirm this on EFD tanks,
slide the shutoff valve on the air hose away from the
tank, then open the pressure relief valve on the tank.
CAUTION
Normal cleaning is accomplished by purging with
appropriate solvent. Some material, however, may
cause a buildup on the fluid body and diaphragm,
which will require a periodic thorough cleaning by
removing the fluid body.
To remove the fluid body:
Remove the two retainer screws. It is not always
necessary to remove the fittings from the fluid body for
cleaning. If the fittings must be removed, be careful —
solidified material on the fitting thread could cause the
fluid body thread to strip out.
NOTE: Avoid using sharp probes for cleaning. Any
scratches or nicks on the diaphragm or the sealing
side of the fluid body may cause the valve to leak and
require replacement of both the diaphragm and fluid
body.
To reinstall the fluid body:
1. Align the fluid body holes with the diaphragm
and air cylinder body holes, and reinsert the
retainer screws. Tighten 1/2 turn after the screws
contact the fluid body. Proper torque is 0.75 N·m
(7 in.-lb).
2. If the diaphragm holes do not line up with the
tapped holes in the air cylinder body, follow
Step#4 on the next page.
1. Engage the
screwdriver in the
piston shaft and hold.
2. To unscrew the
diaphragm, turn
counterclockwise.

752V-HL Dispense Gun
For Nordson EFD sales and service in over
40 countries, contact Nordson EFD or go to
www.nordsonefd.com.
Global
800-556-3484; [phone]
[email protected]
Europe
[phone]
[email protected]
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SEAsia: [phone]; [email protected]
The Wave Design is a trademark of Nordson Corporation.
©2019 Nordson Corporation 7026835 v072619
Service (continued)
Check the reservoir pressure gauge prior to
performing any maintenance to ensure that the
pressure is zero (0). To confirm this on EFD tanks:
slide the shutoff valve on the air hose away from
the tank, then open the pressure relief valve on the
tank.
CAUTION
To change the diaphragm:
1. Remove the fluid body.
2. Place the 1/8" flat tip screwdriver (supplied)
through the center hole in the air cylinder cap.
See above. Engage the slot in the end of the
piston shaft. While holding the screwdriver,
unscrew the diaphragm counterclockwise.
3. While holding the screwdriver, carefully
thread on the new diaphragm. Be careful not
to strip or cross-thread the diaphragm thread.
Finger-tighten with medium pressure until the
diaphragm bottoms against the shoulder on
the piston rod.
4. Before installing the fluid body, determine the
operator’s desired position of the fluid inlet
fitting. Use the screwdriver inserted through
the hole in the air cylinder cap to align the
holes on the diaphragm with the appropriate
holes in the air cylinder body. Holding the
air cylinder body, rotate the piston shaft
clockwise using the screwdriver until the
appropriate holes line up.
5. Reinstall the fluid body. Tighten the retainer
screws 1/2 turn after they contact the fluid
body. Proper torque is 0.75 N·m (7 in.-lb).
Air cylinder cap
#7021404
Piston return spring
#7014688
Tab washer
#7014259
Thrust washer
#7014862
Snap ring
#7014757
Piston and
shaft assembly
#7021379
Air cylinder and
lever assembly
#7021393
Bail hanger
#7021220
Fluid body
#7021360
(2) Retainer screws
#7014754
Tip adapter
#7014835
Diaphragm
#7021287
Fluid inlet
fitting
#7021499