Nordson_EFD_Series_450_Instructions - 第12页
Series 450 Autovalve / Snuff Back | Instructions / Parts Lists 12 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide. AV-RK-TFV #7704092 Ref…
Series 450 Autovalve / Snuff Back | Instructions / Parts Lists
11www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
Air Cylinder — #7702265 Hardened SS Shafts
NOTE: Prior to assembly lubricate all
O-rings with auto grease.
P/N Ref. # Qty. Description
7702403 70 1 Snuff-Back Adjustment Screw
7702079 71 2 BHCS 1/4-20 x 1/2" long
7702402 72 1 Aluminum Back Plate
7702077 73 1 Brown Viton O-Ring (Back Plate)
7702076 74 1 Brown Viton O-Ring (Piston)
7702400 75 1 Replacement Piston and Hardened SS Shafts
7702074 76 1 Replacement Body with Front Seals
Series 450 Autovalve / Snuff Back | Instructions / Parts Lists
12 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
AV-RK-TFV #7704092
Ref. No. Qty. Description
13 2 PTFE Front Seal
3 6 Viton U-cup & Viton O-ring
6 6 Viton (brown) O-ring
AV-RK-TGT #7704093
Ref. No. Qty. Description
13 2 PTFE Front Seal
3 6 UHMPE U-cup & SS Spring
6 6 PTFE encapsulated O-ring
AV-RK-TGV #7704094
Ref. No. Qty. Description
13 2 PTFE Front Seal
3 6 UHMPE U-cup & SS Spring
6 6 Viton (brown) O-ring
AV-RK-TPV #7704095
Ref. No. Qty. Description
13 2 PTFE Front Seal
3 6 PU U-cup & Viton O-ring
6 6 Viton (brown) O-ring
AV-RK-TTT #7704096
Ref. No. Qty. Description
13 2 PTFE Front Seal
3 6 PTFE U-cup & PTFE O-ring
6 6 PTFE encapsulated O-ring
Spare Parts Kits
450 Autogun Repair Kits
Each kit contains a complete set of lip seals, O-rings, and front seals.
450 Autovalve with Snuff-Back
Snuff-Back Adjustment: Advancing (clockwise turn) the snuff-back adjustment screw reduces snuff-back, retracting it
(counterclockwise) increases the snuff-back. Since excessive snuff-back action can cause plugging of the valve, adjust for
minimum snuff-back as follows: With the pumps on and valve in the “closed” position, advance the adjustment screw until
material begins to drool out of the static mixer (acting as if the valve is open). Then retract the screw just until fluid stops, at
the minimum snuff-back position. If material drools or drips during operation, slightly increase the snuff-back until the desired
action is achieved.
Locking nut
Connect air to close
Snuff-back
adjustment
screw
Connect air to open
NOTE: Each 450 AutoGun comes with (2) front seals to be
discarded.
Consult Factory for additional seal combinations.
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