SMLD 300

 

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SMLD 100
SMLD 300
SMLD 300G
PULSE GENERATOR

    SMLD 300 are miniature sub-micro liter dispensing valves, which employ a two piece (Valve + Coil) design. This novel two part design allows for fast and convenient replacement of the fluid carrying valve without disconnecting the electrical coil.

    The SMLD type valves are using a unique technology of hard on hard surface interface. The Ruby ball and Sapphire seat support a very reliable and precise operation. The overall dimensions of the valve enable their high density mounting with down to 4.5 MM center to center spacing. The opening and closing time of the valve can be brought down to 200 usec, allowing precise dispensation of volumes down to 25 nano-liters.

 Technical Specifications

  

Dimensions:

 

Overall Length                                         1.33”   

Width from the side                                 0.137”

Width from the front                                0.173”

Dispensing cylinder Dia.                            0.168”

  

Electrical parameters:

Coil resistance                                         10 Ohm   

Actuation                                                 12-24VDC*

Maximum working temperature                 80 0C

Duty cycle*                                               100%

Operating dispensing frequency                ~3000 Hz

 * Using TechElan DRV type drivers (0.2 mSec full voltage pulse, followed by low sustaining voltage).         

Drivers are pre-programmed, PWM modulated step down drivers, TTL activated.

   Note: Both PCB mounted and stand-alone wired versions of DRV drivers are available from TechElan.

  

Fluidic parameters: (It is highly recommended to

pre-filter [20-50um] any material upstream of the

microvalve to minimize clogging)

  

Connection - barbed                                       1/32” ID tubing

Flow  (Water at 10 PSI)                                  100 nl/msec (6 ml/min)

*Note: The flow can be adjusted:   

-         By adjusting the liquid feeding pressure,

-         Through intermittent “pulsing” flow.

Optimal operating pressure (Fluid dependent)    3 - 30 PSI

Dispensation orifice (sapphire)                         100 um

Armature travel                                               30 um

Internal volume                                                25 ul

Minimum dispense volume (CV <5%)                  20 nl

*Note: Minimum CV < 2% with feedback correction.

Maximum viscosity                                          50 centistokes

*Note: Dependent on fluid, particulates, surface tension,

non-Newtonian fluids, etc.

 

Please contact us for more information

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