User Guide

Specifications
General
Size: 127.5 mm length x 26.9 mm diameter
(5.02" x 1.06")
Weight: 255 grams (9.0 oz)
Fluid body: Type 303 stainless steel
Air cylinder body: Hard-coated aluminum
Piston: Type 303 stainless steel
Needle: Type 303 stainless steel
Fluid inlet thread: 1/8 NPT female
Fluid outlet: Luer taper with retaining nut
Air pressure required: 70 psi (4.8 bar)
Maximum fluid pressure: 100 psi (6.9 bar)
Maximum operating temperature: 43ºC (110ºF)
Mounting: 1/4-28 UNF tapped hole
Tip adapter/needle seat: Type 303 stainless steel
Calibration Feature
The stroke control reference ring of each 741MD-SS valve is
factory calibrated to the zero position. Slight internal variations in
dispensing tips may require the stroke control to be recalibrated
when tips are changed. To do so:
1. Make a note of the current stroke setting number.
2. Turn the calibration knob (inner) counterclockwise one
full turn.
3. Install the new dispensing tip and ensure that the
retaining nut is tightened fully.
4. Turn the stroke adjustment knob (outer) clockwise until it
stops at the zero position.
5. Turn the calibration knob clockwise until it stops.
The stroke adjustment is now calibrated to zero.
6. Reset stroke to the required position noted in step 1.
In the event that the stroke reference ring must be repositioned
or reset to the zero mark, use the following procedure:
A. Remove the dispensing tip, if installed.
B. Turn the small knob counterclockwise one full turn.
C. Turn the large knob clockwise until it stops.
If the zero on the reference ring does not line up with the index
mark, continue with the following steps:
D. Loosen the small set-screw located on the reference ring.
E. Rotate reference ring until it aligns with the reference line
on the air cylinder body.
F. Tighten the small set-screw to lock the reference ring into
position.
G. Install a dispensing tip and follow calibration procedure
steps 3 to 5.
For consistent dispense valve operation and easy adjustment
of valve output, EFD recommends using the ValveMate
7000 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]
©2006 Nordson Corporation 741MD-INSTALL-01 v062606
®
A NORDSON COMPANY