2/2 or 3/2 Way Rocker Valve Type 0127
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2/2 or 3/2 Way Rocker Valve Type 0127

A microfluidic rocker valve combining low internal volume with minimal dead volume, for less unused fluid and a reduced chance of contamination. A  PEEK body, FFKM seal and separating diaphragm between the fluid and actuator gives maximum chemical resistance, making this valve a cost-effective industry standard for a wide range of laboratory, medical and analysis applications. Available in 2-way normally closed and 3-way versions. 
Available within 1 week
€106.00
A microfluidic rocker valve combining low internal volume with minimal dead volume, for less unused fluid and a reduced chance of contamination. A  PEEK body, FFKM seal and separating diaphragm between the fluid and actuator gives maximum chemical resistance, making this valve a cost-effective industry standard for a wide range of laboratory, medical and analysis applications. Available in 2-way normally closed and 3-way versions. 

Features

  • A cost-effective, yet versatile and high performance solenoid valve
  • Available in both 2/2 or 3/2 way configurations, 12 VDC or 24 VDC
  • Compact design: 16 mm width and Cv ratings up to 0.058
  • PEEK body and FFKM (Kalrez) seal material
  • Excellent cleanability, 100% duty cycle
  • Fast switching time of 25 ms
  • High back pressure tightness
  • Two types of connection available: subbase (for connection to a manifold) or 1/4-28 UNF
  • Orifice size: 1.2 mm
  • Electrical connection: two FEP-leads 0.2 mm², length 500 mm

Characteristics

  • Rocker valve with separating diaphragm
  • Body in PEEK, seal in FFKM (Kalrez) for broad chemical compatibility
  • 24V DC voltage (subbase version), 12V DC (1/4-28 version)
  • Electrical connection with flying leads
 Circuit function Orifice (mm) Port connection Voltage Kv value water (m3/h) Cv value water (gpm) QNn value air (L/min) Pressure range (bar)
2/2 Way NC Valve Schematic - Darwin Microfluidics

2/2 way (normally closed)

1.2 mm Subbase 24V DC 0.03 0.035 32 0 up to 5

2/2 Way NC Valve Schematic - Darwin Microfluidics

2/2 way (normally closed)

1.2 mm 1/4-28 UNF 12V DC 0.025 0.029 27 0 up to 5
3/2 Way Valve Schematic - Darwin Microfluidics

3/2 way

1.2 mm Subbase 24V DC 0.03 0.035 32 0 up to 5
3/2 Way Valve Schematic - Darwin Microfluidics

3/2 way

1.2 mm 1/4-28 UNF 12V DC 0.025 0.029 27 0 up to 5

Maximum Precision

In the world of microfluidics, precision and reproducibility are must-haves.  Bürkert microvalves have been able to meet these demands through innovation solutions and precise manufacturing standards to provide devices that are both high performance and long-lasting. With a switching speed of 25 ms, this valve provides fast and reliable operation.


Excellent Cleanability

Cross contamination can be a serious issue in microfluidics, particularly when working with biological media.  Thanks to their low dead volume designs, optimised flow paths and precision molding, Bürkert has ensured that their microvalves are easily cleanable. Utilizing a diaphragm to separate the media from the actuation mechanism, this valve maintains this commitment to cleanability.

Low Internal Volume

When material costs are high, they should be used more efficiently. By minimizing the internal volume of their valves, Burkert not only improves their cleanability, but also facilitates the most efficient use of precious fluid resources.  This microvalve has a total internal volume of <70 µL, for applications in which liquid efficiency is key.

Outstanding Chemical Resistance

Whether you're working with strong acids, concentrated solvents, or cell suspensions, Burkert microvalves are manufactured in close concert with their chemical laboratories to ensure their materials are being used to ensure chemical resistance in the most critical of applications. With a PEEK body and FFKM seal, this valve is second to none in terms of chemical compatibility.

Low Heat Transfer to the Medium

By keeping the actuating solenoid and the fluid chamber separate in their microvalves, Bürkert minimizes the uncontrolled heat transfer into the fluid medium. Additionally, low microvalve power consumption helps reduce heat production. 

 

rocker-valve-schematic-microfluidic-burkert-rocker-valve-microvalve

Rocker Valve Principle

Rocker microvalves are characterized by a pivoting "rocker" arm, which, when actuated by a solenoid, moves in one plane to open or close the microvalve. A diaphragm between the rocker and the microvalve seats creates reliable separation of actuator and media and allows for excellent cleanability of the fluid chamber, making them particularly well suited for being used with biological media. The small amount of moving mass and operation principle of the rocker microvalve construction facilitates a very long service life and secure seals of the microvalve seats even in the presence of high back pressure.  

    The schematics below demonstrate the power-off and power-on positions of a typical 3-way rocker microvalve.

    Power-off Position (3/2-way rocker valve)

    microfluidic rocker valve power off position schematic

     Power-on Position (3/2-way rocker valve)

    microfluidic-rocker-valve-power-on-position-schematic

    Key characteristics of rocker microvalves:

    • Exceptional cleanability
    • Low internal volume
    • High back pressure tightness
    • Media and actuator separation 
    Bürkert Type 0127 Valve Technical Drawing - Darwin Microfluidics

    Technical drawing of the 0127 valve with 1/4-28 connection ports

    Specifications

    Orifice and pressure range

    2/2 way version: 1.6 mm, 0 up to 5 bar

    3/2 way version: 1.6 mm, 0 up to 5 bar

    Body material PEEK
    Seal material FFKM (Kalrez)
    Media resistance Resistant to neutral and aggressive liquids and gases
    Media temperature -10 °C to +55 °C
    Typical service life 10.000.000 switching cycles
    Internal volume
    • Subbase: 106 µL
    • 1/4-28 UNF: 79 µL (2/2 way), 95 µL (3/2 way) 
    Port connection

    Bürkert subbase or 1/4-28 UNF

    Electrical connection

    two FEP-leads 0.2 mm², length 500 mm

    Power supply

    1/4-28 Version: 12V DC

    Subbase Version: 24V DC

    Voltage tolerance +/- 10%
    Power consumption 3.4 W
    Duty cycle 100% continuous operation
    Installation As required, preferably with actuator upright
    Protection class IP54
    Response times (measured at valve outlet with air at 1 and 2 bar and +20 °C) Measurement at valve output with 2 bar and 20 °C acc. to DIN ISO 12238:2001
    • Opening: 25 ms (pressure rise 0 to 10%)
    • Closing: 25 ms (pressure drop 100 to 90%)

     

    Microvalve Dosing Principles

    There are several dosing principles in microfluidics with which these microvalves can be very effectively implemented. The following schematics outline the two most common dosing principles: time-pressure dosing and syringe pump dosing.

    Time-Pressure Dosing

    Time pressure dosing operates by using a pressure source to pressurize a fluid tank or reservoir. The medium is then carried through a microvalve to a dosing needle with parameters such as tank pressure, flow resistance, medium viscosity and temperature being controlled. The flow of medium can be controlled by simply controlling the amount of time for which the microvalve is open. This dosing method is highly accurate and repeatable, and as the medium is driven by air pressure instead of a pumping mechanism, it does away with mechanical parts in the fluid stream and can contribute to system longevity.

    Syringe Pump Dosing

    In syringe pump dosing with a 3/2-way microvalve, fluid medium can be taken through suction from a reservoir into a syringe and then pumped through a dispensing needle once the microvalve have changed its position. In this way it is possible to dispense small, and precise volumes of fluid. System cleaning can be done in an analogous method.

     

    A simple 2/2-way microvalve can also be used to facilitate air isolated syringe pump dosing, in which the dispensed fluid comes into contact with only the dispensing tip, not the microvalve or pumping mechanism, as shown in the schematic below. This can be an important method in applications needing to highly control the risk of contamination. 

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    Worldwide shipping

    We ship worldwide from our warehouse in France.

    The shipping charges are calculated based on the weight of the package and the country of destination: you can estimate the shipping cost on the cart page. We try to offer you the best shipping rates and services, shipping all our orders through DHL Express. Generally, your order reaches your lab in only 2 to 3 days after we send it, no matter the destination! 

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