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CATEGORIES

Dispensing Valves

osing low- to high-viscosity media Dispensing valves by DOPAG are used in all industry sectors for discharging low to high-viscosity media. They feature high precision and very high repeatability with regard to discharge quantity. These valves are available in different series and design sizes. Due to the variety of valve types, there is a perfectly suitable valve for each individual application.

DOPAG produce a wide range of dispensing valves, used to apply many different single component materials, such as adhesives, sealants, greases and oils, fed under pressure from a pumping system. DOPAG dispensing valves are able to handle materials with viscosities up to 1,000,000 m Pas and will withstand pressures of between 150 and 250 bar, depending on the model chosen.

PRODUCTS

  • High-Speed Valves
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    The High-speed valve can be used to apply grease or oil to the workpiece from a distance of up to 120 mm without stringing (contactless). An innovative valve nozzle has a self-cleaning effect that ensures a permanently clean application of material as well as a perfect cut off of the material flow, whether the valve is used for shot or bead laying applications. The compact design offers the opportunity to use the valve even in the narrowest of spaces. Features and Benefits Contact free application up to 120 mm No stringing Optimised valve closing technique Compact construction Integrated material filter Splash proof Short switching times Equipment Optional Different nozzle sizes - To meet individual requirements of viscosities and flow rates, alternative nozzles sizes are available. Metering control - Through the use of volume counters, volumetric metering control is possible. DOPAG metering computer - By using the metering computer all applications that can be achieved with the High-Speed Valve can be parameterised and alternative metering processes can be memorized. The metering computer can either be directly integrated or wired to an external remote housing. Technical Specifications Flow rate 1.0 to 20 mm� per shot Viscosity < 150,000 mPa s (higher on request) Switching frequency up to 100 Hz Apply distance 120 mm Environmental temperature -7 �C to +50 �C Material temperature up to 65 �C Working pressure 1 to 20 bar(depending on the viscosity) Weight approx. 580 g
  • Membrane Dispensing Valves
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    Membrane dispensing valves are used for for processing low to high viscosity media. They can be reactive, abrasive as well as chemically aggressive. This low maintenance valve relies on a flexible diaphragm to seal the fluid passageways from the pneumatically driven actuating section of the valve, with only the media. If necessary the fluid passageways can easily be flushed. (Internal diameter: 2 - 8 m)

    Product Features:
    Compact design
    Leakage free operation
    Material housing stainless steel
    Adjustable snuff back effect
    Valve seat tungsten carbide
    Adjustable snuff back effect

    Options
    Solenoid valve plate
    Manual handle with trigger or foot pedal for pneumatic or electric operation
    Technical Specifications
    Internal
    diameter � Working
    pressure bar Max. working
    pressure bar Weight
    approx. kg
    2.0 mm 160 200 0.45
    4.0 mm 160 200 0.70
    8.0 mm 160 200 2.20
  • Needle Dispensing Valves
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  • Spray Valves
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    The Spray valve is specifically designed for application of grease and oil. The valves can be used with intermitting operation and for continuous spraying. Special for this type of valve is the integration of the spray air valve, which is used to control the air blow after material shot for cleaning of the nozzle. Short air connection in the body of the valve and a flange mounted 5/2 way solenoid valve are supporting highly precise intermitting. Various different aircaps allow adaption of final spray results.


    Sealings Viton� (other materials upon request)
    Product Features: Various nozzle sizes available Raster regulation for simple control of the material volume Solenoid valve with different voltages (24V/DC, 110V/AC, 220V/AC) Various nozzle shapes and air caps depending on the final application available Optional needle detection Technical Specifications Material pressure max.bar 35 Control air min.bar 5-6 Intermitting max. Cycles/Sec30 Dimensions mm132 x 81 x 22 (incl. solenoid valve) Main body materialStainless steel Nozzle + needle materialStainless steel
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