Nordson 736HPA-NV Maintenance Manual

736HPA-NV High Pressure Dispense Valve

Maintenance & Parts Guide

™

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736HPA-NV High Pressure Dispense Valve | Maintenance & Parts Guide

Valve Disassembly and
Reassembly Procedures

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

3.4–1.0 N•m (30–35 in.-lb).

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.

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.

16. Replace the O-rings on the spool, piston and air
cylinder body.

17. Apply Nye lubricant #865 gel to piston, spool and
air cylinder wall.

18. Reinstall the piston return spring, piston and
spool assembly and then the adjustable stroke air
cylinder cap. Tighten the air cap to 10.8–13.6N•m
(8–10 ft-lb).

19. Reinstall the fluid body, outlet cap and tighten the
three bolts to 3.4–1.0 N•m (30–35 in.-lb).

CAUTION

Do not thread fluid inlet fittings too far into the valve.
Doing so can obstruct the piston shaft, causing
leakage, poor dispensing performance, and damage
to the valve.

11. Reinstall the outlet cap and fluid body. Tighten the
three bolts to 3.4–1.0 N•m (30–35 in.-lb).

Bolts

7

1

Lower seal
#7014745 (Hytrel
#7014746 (Viton®)

®

)

Fluid body
#7021158

Air cylinder
body
#7013448

12

Split washer

#7023626

2 www.nordsonefd.com [e-mail] [phone] Sales and service of Nordson EFD dispensing systems are available worldwide.

Outlet cap
#7021160

O-ring
#7014687

258

13

Upper seal
#7014745 (Hytrel
#7014746 (Viton®)

®

)