Nordson-EFD-725D-725DA-Tech-Support-Guide.pdf - 第7页
10 11 12 10. Install the sealing head and screw using the 1/4" flat tip screwdriver . If a torque screwdriver is av ailable , proper torque is 1.69 nm (15 in lbs). 11. Install and tighten the fluid body cap using the …
6
6. Install the shaft and diaphragm.
• The convex ring of the diaphragm should
face away from the air cylinder.
7. Using the 3/8" open-end wrench, tighten
the shaft. If a torque wrench is available,
torque to 1.69 Nm (15 in lbs).
8. Insert the 1/8" hex wrench through the
air inlet fitting and tighten the shaft
locking screw. If a torque wrench is
available, torque to 2.82 Nm (25 in lbs).
9. Install the fluid body and tighten using
the 1/8 NPT rod and 8" adjustable
wrench. If a torque wrench is available,
torque to 6.78 Nm (5 ft lbs).
7
8
9
725D / 725DA Dispense Valve | Tech Support Guide
6 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
10
11
12
10. Install the sealing head and screw using
the 1/4" flat tip screwdriver. If a torque
screwdriver is available, proper torque is
1.69 nm (15 in lbs).
11. Install and tighten the fluid body cap
using the 1/8 NPT rod and 8" adjustable
wrench. Remove the 1/8 NPT rod.
The valve is now fully assembled and
ready for testing.
12. Pressure test the valve.
• Pressure test the valve by applying 100
psi (7.0 bar) air pressure to the fluid inlet.
• Apply soapy water and check for leaks
at the fluid outlet and the small vent hole
above the diaphragm.
If you have followed all of the above steps and the valve has passed the leak test:
Congratulations on a job well done! You have successfully reconditioned your EFD
725 or 725DA dispense valve and can look forward to many millions of consistent dispensing
cycles.
If the valve leaks after reassembly, proceed as follows:
Leaking at fluid outlet: Check the tightness of the sealing head
screw. If the screw is tight, remove and check the surface of the fluid
chamber seat for pitting. If pitted, replace the fluid body.
Leaking at vent hole: Disassemble the valve and review Steps 7–9 to
make sure the shaft and fluid body are tight.
725D / 725DA Dispense Valve | Tech Support Guide
7www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
Repair Kits
725D repair kit – part #7021008
725DA repair kit – part #7021013
(Repair kits include O-rings, diaphragm, sealing head with
screw, and lubricant)
725DA-RK (shown) contains white 200 sealing head
725D-RK (not shown) contains yellow 450 sealing head
Maintenance and Replacement Parts
725DA
725
Air cylinder cap includes
O-ring (Buna N)
#7020910
Shaft locking screw
Air piston, includes
O-ring (Buna N)
#7020958
Spring #7014740
Air cylinder body
assembly #7020974
Wrench flats
Diaphragm #7020925
Shaft #7020929
Fluid body
#7020970
(stainless steel)
#7020967
(hard-coated aluminum)
Wrench flats
Shoulder “A”
Body cap includes
O-ring (Viton)
#7020950 (aluminum)
#7020952 (stainless steel)
Tip adapter
#7016948
Diaphragm #7020925
Air cylinder cap includes
O-ring (Buna N)
#7020910
Shaft locking screw
#7020916
Push-in fitting
Push-in fitting #7016935
O-ring only
#7020912
O-ring only
#7014738
O-ring only
#7020912
O-ring only
#7014738
Air piston, includes
O-ring (Buna N)
#7020917
Thrust washer
#7020922
Spring #7014740
Air cylinder body
#7020924
Shaft #7020929
Shoulder “A”
Fluid body
#7020931 (stainless steel)
#7020932 (hard-coated aluminum)
Fluid inlet fitting
#7021499
Fluid inlet fitting
#7021499
Body cap includes
O-ring (Viton)
#7020950 (aluminum)
#7020952 (stainless steel)
Sealing head
with screw #7020961
Sealing head with screw
#7020937
Tip adapter
#7016948
O-ring only
O-ring only
725D / 725DA Dispense Valve | Tech Support Guide
For Nordson EFD sales and service in over
40 countries, contact Nordson EFD or go to
www.nordsonefd.com.
Global
800-556-3484; +1-401-431-7000
info@nordsonefd.com
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00800 7001 7001
infoefd.europe@nordsonefd.com
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