Nordson-EFD-MeterMix-Guide.pdf - 第7页
7 Series 450RC Recir culating Autovalve 7702217 450RC Autovalve Aluminum Valve, Single Air Cylinder w/ Snuff Back, GT Seals Order handle separately; see Autovalve Accessories for details. Manifold Seat Plate Valve Body T…
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Series 450 Autovalve
Recommended Mixer:
Series 160 Mixer
The pneumatic Series 450 Autovalve is similar to the Series 400 Autovalve, except for
the shut-off pistons which ensure good control of dot or shot volume. After each shot,
the dual pistons retract and “snuff back” material from the end of the mixing nozzle.
This feature helps eliminate “after drool.” This valve includes hard-coated and lubricated
pistons. It can be used either as a stationary head or hand-held unit. In addition, seals
can be adjusted without disassembly of the valve body.
Manifold
Seat Plate
Valve Body
Tie Plate
Lip Seal
O-ring
Air Cylinder Body
7702201 450 Autovalve
Aluminum Valve, Single Air Cylinder w/Snuff Back,
GT Seals
7702209 450 Autovalve
Aluminum Valve, Single Air Cylinder w/Snuff Back,
PV Seals
7702443 450 Autovalve
Stainless Steel Valve, Single Air Cylinder w/Snuff
Back, GT Seals
Order handle separately; see Autovalve Accessories
for details.
MANIFOLDS FOR SERIES 450 / 450RC / 450XT AUTOVALVES
Ratio Part # (Manifold) Part # (Manifold with solvent port) Material Flow
1:1 7702221 7702222 Aluminum Low Flow
Wide 7702224 - Aluminum Low Flow
1:1 7702541 - Stainless Steel Low Flow
Specications
See Series 400, previous page
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Series 450RC Recirculating Autovalve
7702217 450RC Autovalve
Aluminum Valve, Single Air Cylinder w/ Snuff Back,
GT Seals
Order handle separately; see Autovalve Accessories
for details.
Manifold
Seat Plate
Valve Body
Tie Plate
Lip Seal
O-ring
Air Cylinder Body
Recommended Mixer:
Series 160 Mixer
The 450RC Autovalve allows continuous ow of material while still being able to
control shut-off at the mixer. Typical uses are for heated materials or materials with
llers that need to remain suspended. Gear pump applications can also benet
because pumps can be kept running while material is shut off at the mixer.
Recirculation occurring at the valve instead of the pump eliminates pressure buildup
in the lines, preventing off-ratio dispensing. The valve also incorporates a snuff-back
feature that minimizes or eliminates the possibility of material dripping or stringing
when the valve shuts off.
Manifolds:
See Series 450 Manifold Table, previous page
Series 450XT Snuff Back Valve
7702216 450XT Autovalve
Aluminum Valve, Extended Air Cylinder with Snuff
Back and GT Seals
Order handle separately; see Autovalve Accessories
for details.
Recommended Mixer:
Series 160 Mixer
This innovative dispense valve is designed specically for two-component urethanes and
eliminates exposure of wetted shafts to air. Since 2K urethanes are moisture sensitive,
any contact with air can cure the material, locking up the dispense valve.
Manifold
Seat Plate
Valve Body
Lip Seal
O-ring
Air Cylinder Body
Manifolds:
See Series 450 Manifold Table, previous page
Specications
Valve
Size: 132l x 63.5w x 58.4h mm (3.3 x 2.5 x 2.3")
Body: 6061-T6 aluminum or 303 stainless steel
O-ring options*: Viton, PTFE Ethylene-Propylene (E-P)
Lip seal options*: Viton, Polyurethane (PU), PTFE,
Polytuff, Ethylene-Propylene (E-P)
* Repair kits containing a complete set of lip seals and
O-rings are available.
Manifold
Size: 48.3l x 63.5w x 38.1h mm (1.9 x 2.5 x 1.5")
Material: 6061-T6 aluminum or 303 stainless steel
Outlet thread size options: 7/8"-14 (for standard bell mixers)
Valve System
Weight: Aluminum valve and manifold: 2.0 lb (0.9 kg)
Stainless steel valve and manifold: 3.4 lb (1.5 kg)
Operating Parameters: Min. operating pressure: 80 psi (5.5 bar)
Max. fluid pressure: 3500 psi (240 bar)
Electric handle mount switch: 24V
Specications Accessories
Weight: Aluminum valve and manifold: 1.6 lb (0.7 kg)
Stainless steel valve and manifold: 2.5 lb (1.1 kg)
Pressure Rating: 240 bar (3500 psi)
Polytuff, PTFE, Viton, and EP seals:
For varying chemical formulations and abrasive conditions
Optional Night Cap & Ratio Check Cap:
Available for 1:1 ratio manifolds
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400 / 450 Autovalves Accessories
CARBON STEEL PIPE ADAPTERS
Part Part # Description
7702420 90° Elbow w/3/8" FNPS
7702425 Straight Adapter w/3/8" FNPS
TRIGGER HANDLES
If using an electric handle, a solenoid from an outside vendor is required.
Elbow adapters are available to connect material lines to the valve.
Part Part # Description
7701971 Pistol Grip Handle w/Electric Momentary Switch (24V)
7701977 Pistol Grip Handle w/Pneumatic Switch
RATIO CHECK CAP AND NIGHT CAP
Part Part # Description
7701181 PTFE Night Cap & Nut
7701184 PTFE Ratio Check Cap & Nut
REPAIR KITS
Part Part # Description
7704093 2K Kit 4X0 Repair TGT
7704095 2K Kit 4X0 Repair TPV
VALVE SEALS
EFD offers a wide variety of seal configurations for Series 400/450 autovalves.
Select both the O-ring and U-cup seals based on chemical compatibility.
O-rings Part # Material Color Description
7702275 PTFE Orange Recommended with all chemicals
U-cups Part # Material Color Description
7702280 PTFE Aqua
With PTFE O-ring /
Recommended with all chemicals
7702277 UHPME Clear
With SS spring / Epoxies (amine
catalyst), polyesters, and acrylics
7702281 PU Orange
With Viton O-ring / Epoxies
(general), polyurethanes, and
polysulfides