User Guide

Specifications
781S and MM781-SYS
Weight: 235.3 grams (8.29 oz)
Fluid body: Hard-coated aluminum
Air cylinder body: Hard-coated aluminum
781S-SS
Weight: 405.3 grams (14.29 oz)
Fluid body: Type 303 stainless steel
Air cylinder body: Type 303 stainless steel
General
Size: 104.6 mm length x 26.9 mm diameter
(4.12” x 1.06”)
Air cap: Type 303 stainless steel
Piston: Type 303 stainless steel
Needle and nozzle: Type 303 stainless steel
Free flow orifice: 1.17 mm (0.046”); 0.71 mm (0.028”);
or 0.36 mm (0.014”)
Needle packings: Teflon
®
Fluid inlet thread: 1/8 NPT female
Mounting: (1) 1/4-28 UNF tapped hole
Air pressure required: 70 to 90 psi (4.8 to 6.2 bar)
Maximum input fluid pressure: 300 psi (20.7 bar)
Maximum operating temperature: 102ºC (215ºF)
Operating frequency: Exceeds 400 cycles/minute
Note: All stainless steel valve parts are passivated.
Round
Fan
Side view of
fan air cap
Spray Patterns
Nozzle Distance from the Work Surface:
Nozzle Distance from the Work Surface:
Fan Pattern Spray Area Coverage
Round Pattern Spray Area Coverage
25.4 mm 50.8 mm 76.2 mm 152.4 mm
Nozzles 1” 2” 3” 6”
#7857-46SS
Standard
1.17 mm 6.35 mm 12.70 mm 19.05 mm 38.10 mm
(0.046”) 0.25” 0.50” 0.75” 1.50”
#7857-46WA-SS
Wide-angle
1.17 mm 19.05 mm 38.10 mm 50.80mm
Not
(0.046”) 0.75” 1.50” 2.00” Recommended
#7857-28SS
0.71 mm 5.08 mm 10.16 mm 15.24 mm 30.48 mm
(0.028”) 0.20” 0.40” 0.60” 1.20”
#7857-14SS
0.36 mm 4.32 mm 8.64 mm 12.70 mm 25.40 mm
(0.014”) 0.17” 0.34” 0.50” 1.00”
25.4 mm 50.8 mm 76.2 mm 152.4 mm
Nozzles 1” 2” 3” 6”
#7857F-46SS
(1.17 mm) 25.40 mm 38.10 mm 50.80 mm 82.55 mm
0.046" 1.00" 1.50" 2.00" 3.25"
#7857-46WF-SS
(1.17 mm) 38.1 mm 63.5 mm 82.55 mm 165.1 mm
0.046" 1.50" 2.50" 3.25" 6.50"
#7857F-28SS
(0.71 mm) 10.16 mm 20.32 mm 30.48 mm 60.96 mm
0.028" 0.40" 0.80" 1.20" 2.40"
#7857F-14SS
(0.36 mm) 8.63 mm 17.27 mm 25.4 mm 50.8 mm
0.014" 0.34" 0.68" 1.00" 2.00"
For consistent dispense valve operation and easy adjustment
of valve output, EFD recommends using the ValveMate 7040
controller on all automatic, semi-automatic and benchtop
applications.
The EFD Ultra TT Series positioning systems incorporate
dispensing control into the main system.
Contact the EFD Dispense Valve Systems Group for details.
For EFD sales and service in over 30 countries,
contact EFD or go to www.efd-inc.com/contact
EFD, Inc.
East Providence, RI USA
800-556-3484; [phone] (outside the USA)
[e-mail] www.efd-inc.com
EFD International Inc.
Dunstable, Bedfordshire, UK
0800 585733 or [phone]
Ireland 00800 8272 9444
[e-mail] www.efd-inc.com
EFD, Inc., Asia
China: [phone]
[e-mail] www.efd-inc.com/cn
Singapore: [phone] [e-mail]
Teflon is a registered trademark of DuPont.
©2006 Nordson Corporation 781S-INSTALL-01 v062606
®
A NORDSON COMPANY