Nordson_EFD_Series_450_Instructions - 第14页

Series 450 Autovalve / Snuff Back | Instructions / Parts Lists 14 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide. Accessories (continued…

Series 450 Autovalve / Snuff Back | Instructions / Parts Lists

13www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.

Accessories

Hose Fittings for 450 Valves

Swivel Check Valve Adapters

For A & B materials, we offer a combination check valve / ﬂuid inlet adapter. This rugged, all in one, adapter provides a metal

to metal seal for proven low maintenance, in an ideal location. It also incorporates a swivel connection for ease of air purging.

P/N Description

7702408 All SS, except Alum. collar, 1/4 FNPT

The valve body has 9/16-18 inlets. The following ﬁttings are available to connect the A & B hoses.

NOTE: All ﬁttings are supplied with EP O-rings. Optional Viton O-rings available on request. Substitute V for Viton instead of

Part No. sufﬁx E.

Carbon Steel Adapters

P/N Description

7702414 90 degree Elbow with 1/4 MNPT

7702407 90 degree Elbow with 1/4 FNPS

7702420 90 degree Elbow with 3/8 FNPS

7702419 Straight Adapter with 1/4 MNPT

7702428 Straight Adapter with 3/8 MNPT

7702425 Straight Adapter with 3/8 FNPS

Carbon Steel 37 Degree JIC Adapters

P/N Description

7702417 Straight Adapter with 1/4" Male JIC

7702426 Straight Adapter with 3/8" Male JIC

Collar

Series 450 Autovalve / Snuff Back | Instructions / Parts Lists

14 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.

Accessories (continued)

Ratio Check Cap

In order to ensure correct A/B ratio, ratio checks

should be performed regularly with our Ratio Check

Cap.

Night Cap

At night or on weekends, it is a good idea to seal your

system. After the static mixer is removed, a night cap

can be installed. This seals the system and makes

startup simpler.

P/N Description

7701184* Ratio Check Cap with retaining nut

7701181* Night Cap with retaining nut

*Use with 1:1 ratio manifolds only.

Ratio check

Night cap

Manifold Manifold

Series 450 Autovalve / Snuff Back | Instructions / Parts Lists

15www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.

Troubleshooting

Problem Possible Cause Solution

No ﬂow Manifold clogged Remove manifold and clean

Air pressure too low Requires 5.5bar (80psi) inlet pressure

Air valve damaged See Note 1 below

Valve fouled See Note 2 below

Disassemble (see Maintenance)

Valve leaks Snuff-back Retract snuff-back screw (70)

Spool valve (75) clogged See Note 3 below

Seals (3) worn Replace seals (see Maintenance)

Spool valve (75) worn Inspect and replace if required

Valve drools Air trapped in valve Replace seals (see Maintenance)

Seals (3) worn Review Startup procedure

Off ratio A:B Metering pumps Check pumps

A & B back up into tie plate Seals (3) damaged Replace back lip seals (page6)

Material not mixing Mixer fouled Replace mixer

Off ratio A:B Take ratio check

Mixer leaks Manifold fouled Clean nose of manifold

Lip seals deteriorated Chemical attack See Maintenance

NOTE 1: Inspect air cartridge valve (103) in handle (90). The On-Off function of the valve is controlled by this cartridge valve

in the handle. The air cylinder requires air in the front to close and air in the back to open.

To inspect the cartridge valve, disconnect the two air lines on the air cylinder (1). When the trigger is depressed, air should

be ﬂowing only through the back air line and not through the front air line. When the trigger (91) is released the air should

reverse.

NOTE 2: Advance the snuff-back screw (70) and pulse air into the air cylinder. Repeat 3 or 4 times.

NOTE 3: First release the pressure on the A and B hoses. Remove the manifold and advance the snuff-back screw (70) until

the spool valves are protruding from the seat plate (8). With a toothbrush or rag soaked in solvent, brush the valves clean.

After cleaning, depress trigger to retract spool valve.