Nordson EFD 736HPA Manual

736HPA High Pressure Dispense Valve
MAINTENANCE & PARTS GUIDE
IMPORTANT!
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contact EFD or go to www.efd-inc.com/contact
EFD, Inc.
East Providence, RI USA
800-556-3484; [phone] (outside the USA)
[email protected] www.efd-inc.com
EFD International Inc.
Dunstable, Bedfordshire, UK
0800 585733 or [phone]
Ireland 00800 8272 9444
[email protected] www.efd-inc.com
EFD, Inc., Asia
China: [phone]
[email protected] www.efd-inc.com/cn
Singapore: [phone] [email protected]
®
A NORDSON COMPANY

O-ring
#7519
Air cylinder
body #73602
Fluid body
#73608
Outlet cap
#73609
Bolts
#H10-32X1.5
Upper seal
#73507-1 (Hytrel®)
#73507V-1 (Viton®)
Lower seal
#73507-1 (Hytrel®)
#73507V-1 (Viton®)
Split washer
#HW10
1
2
5
8
7
12
13
To replace the lower seal:
1. Remove the three bolts from the
outlet cap.
2. Remove the outlet cap.
3. Pry the seal out of the outlet cap
using a small screwdriver.
4. Clean the seal cavity and then press
a new seal into the cavity. Insert
tapered end first, so that the O-ring
faces up.
5. Inspect the fluid body O-ring and
replace if necessary.
6. Reinstall the outlet cap. Tighten the
three bolts to 30 to 35 inch pounds.
To replace the upper seal:
7. Remove the three bolts from the
outlet cap.
8. Remove the outlet cap and fluid
body.
9. Pry the seal out of the fluid body
using a small screwdriver.
10. Clean the seal cavity and then
press a new seal into cavity. Insert
seal with O-ring facing inside the
fluid body.
11. Reinstall the outlet cap and fluid
body. Tighten the three bolts to
30 to 35 inch pounds.
To replace air cylinder seals:
12. Remove the three bolts from the
outlet cap.
13. Remove the outlet cap and fluid
body.
14. Unscrew the adjustable stroke air
cap.
15. Remove the piston-and-spool
assembly and the piston return
spring.
www.efd-inc.com [email protected] USA 800-556-3484 Europe [phone] Asia [phone]
Sales and service of EFD dispensing systems are available worldwide.
Valve Disassembly and
Reassembly Procedures

Adjustable stroke air cyclinder cap #73512
Includes O-ring #72530A
Spool with O-ring #73605
Includes O-ring
(Buna N) #73505A
Piston with O-ring #73604
O-ring (Buna N) #72532A
Shaft lock nut
#73503
Piston return
spring #72534
16. Replace the O-rings on the spool,
piston and air cylinder body.
17. Apply Nye lubricant #865 gel to pis-
ton, spool and air cylinder wall.
18. Reinstall the piston return spring,
piston and spool assembly and then
the adjustable stroke air cyclinder
cap. Tighten the air cap between 8
to 10 foot pounds.
19. Reinstall the fluid body, outlet cap
and tighten the three bolts to
30 to 35 inch pounds.
Maintenance Tools:
1/8” Allen wrench
5/32” Allen wrench
(2) 8” adjustable wrenches
Accessories
1/4 NPT Metal Nozzles
Stainless steel, 38.1 mm (1.5”) long. ID Size
Part # Gauge mm (Inches)
5007-1/4 NPT 7 3.81 (.150)
5008-1/4 NPT 8 3.43 (.135)
5010-1/4 NPT 10 2.69 (.106)
5012-1/4 NPT 12 2.16 (.085)
5014-1/4 NPT 14 1.60 (.063)
5016-1/4 NPT 16 1.20 (.047)
Polyethylene Nozzles
Plastic nozzles with 1/4 NPT thread.
Nozzles may be cut or shaped as
required. Supplied (10) nozzles per
package.
Part # Size
5180-B 63.5 mm long x 3.2 mm
opening (2 1/2” x 1/8”)
5181-B 63.5 mm long x 1.6 mm
opening (2 1/2” x 1/16”)
5182-B 101.6 mm long x 1.6 mm
opening (4” x 1/16”)
5183-B 101.6 mm long x .8 mm
opening (4” x 1/32”)
Dispensing Tip Adapter
Accepts all EFD dispensing tips.
Part # Material
7405MT-1/4 Adapter for use
with metal tips
7405-1/4 Adapter for use with
disposable plastic tips
(continued on back cover)
14
15
16
17
www.efd-inc.com [email protected] USA 800-556-3484 Europe [phone] Asia [phone]
Sales and service of EFD dispensing systems are available worldwide.

Troubleshooting Guide
No fluid flow
•If valve operating pressure is too low, the
valve will not open. Increase air pressure
to 70 psi (4.8 bar) for timed shots and
40 psi (2.7 bar) minimum for stripes.
•The fluid pressure may not be high
enough. Increase pressure.
•The dispensing tip may be clogged.
Replace tip.
•Fluid may have solidified in the fluid
body. Clean the fluid body.
Fluid drools after the valve closes,
eventually stopping
•This is caused by air trapped in the outlet
section of the fluid body or the fluid has
entrapped air. The air will expand after
the valve closes, causing extrusion until
the air reaches atmospheric pressure.
Purge the valve by dispensing at a
steady flow until air is removed.
•If the fluid has entrapped air, it must be
degassed before dispensing.
Fluid drips at a steady rate after the valve
closes
•A steady drip indicates failure of the seal
due to particle build-up or wear. Replace
the seal.
Valve responds slowly when opening and
closing
•Valve response is related to control air line
length and size. EFD valves are supplied
with 5-feet of 1/8” ID tubing attached.
Any additional length or size change will
affect response time. Check to be sure
the length and size have not been
changed.
Fluid flows out above upper seal
•Fluid flowing out above the upper seal
indicates a worn upper seal. Replace seal.
Inconsistent deposits
•Inconsistent deposits can result if the air
pressure controlling the valve and/or
fluid pressure is fluctuating, or if the
valve operating pressure is less than 70
psi (4.8 bar). Check air pressures and
the valve operating pressure.
•The time the valve is open must be con-
sistent. Check to be sure the valve con-
troller is providing a consistent output.
Accessories (continued)
Valve Mounting Rod
Mounting rod dimensions are 177.8 mm
long x 12.7 mm (7” x 1/2”) diameter with
5/16 – 24 UNF thread.
Part # Description
73522 Mounting rod for the 736HPA
valve
Universal Valve Mount
Use with all EFD valves for easy valve
mounting.
Part # Description
7002VM Universal valve mount
Double-Acting Air Closure Kit
The 735AC-KIT is used in applications
dispensing very thick fluids at high cycle
rates. The air closure assists the spring to
provide a quick, clean cut-off at the end
of the dispense cycle.
Part # Description
735AC-KIT Air closure kit
A NORDSON COMPANY
USA: 800-556-3484 or [phone]
Europe: 0800 585733 or [phone]
Asia: [phone]
[email protected] www.efd-inc.com
©2006 Nordson Corporation 736-MAINT-01 v062606