Ideal for automated assembly processes, our MicroDot valve’s smaller dimensions allow it to dispense in tighter spaces at more complex angles and with adjustable needle stroke with a unique calibration feature provides the ability to maintain exact deposit size when dispensing fluid. The added flexibility to mount more valves per fixture plate delivers greater output per batch. There are 2 series, which are standard 741 series and XQR41 with Quick-Release technology.

The 741MD Series MicroDot™ needle valve dispenses very precise micro-deposits down to fractions of a microliter. Pneumatically operated and adjustable, it delivers superior fluid dispensing control. The stainless steel shutoff needle seats in the hub of the dispensing tip rather than the valve body. Having fluid cutoff occur as close as possible to the dispensing orifice minimizes dead fluid volume. Because the needle seat is part of the dispense tip itself, the seat can be renewed by simply replacing the disposable tip. Ideal tip sizes range from 22 to 33 gauge.

The xQR41 Series MicroDot™ needle valve features QR (Quick Release) technology, a 60% smaller form factor, and modular design for new levels of customization in precision fluid dispensing. In addition, its patented QR (Quick Release) clasp allows easy removal of the fluid body to replace wetted parts in seconds, vs. traditional change outs which take minutes. The clasp design eliminates the need to remove the mounting fixture or use any tools during valve maintenance.

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741MD-SS Valve
Size 127.5 mm × 26.9 mm (5.02″×1.06″ diameter)
Weight 251 grams (9.0 oz)
Actuating air pressure required 70 psi (4.8 bar)
Maximum fluid pressure 100 psi (6.9 bar)
Fluid inlet thread 1/8 NPT female
Fluid outlet Luer taper with retaining nut
Mounting 1/4-28 UNF tapped hole
Cycle rate Exceeds 400 per minute
Air cylinder body Hard-coated aluminum
Fluid body Type 303 stainless steel
Piston Type 303 stainless steel
Needle Type 303 stainless steel
Tip adapter Type 303 stainless steel
EFD SafetyLok™ collar Hard-coated aluminum
xQR41 Series Valve
Item Specifications
Size 66 mm length × 23.7 mm diameter (2.60 × 0.930″)
Weight Valve with standard fluid body
-Valve only: 141 G (5.0 OZ)
-With BackPack actuator: 196 g(6.9 oz)
-With mounting block: 166 g (5.9 oz)

Valve with PEEK wetted parts
-Valve only: 115 g (4.1 oz)
-With BackPack actuator: 170 g (6.0 oz)
-With mounting block: 140 g (4.9 oz)
Actuating air pressure required 4.8-6.2 bar (70-90 psi)
Maximum fluid pressure 7.0 bar (100 psi)
Fluid inlet M5
Fluid outlet Luer taper with retaining nut
Mounting M4 (BackPack valve actuator or mounting block)
Cycle rate Exceeds 400 per minute
Air cylinder body 303 stainless steel
Fluid body 303 stainless steel or PEEK
Piston 303 stainless steel
Needle 303 stainless steel or PEEK
Tip retaining nut Hard-ciated aluminum
SafetyLok™ collar Hard-coated anodized aluminum
Maximum operating temperature 80°C (176°F)
US Patent No. 9,816,849 for QR clasp