2/2 Way Microfluidic Whisper Valve Type 6712
Rated 3.5/5 based on 11 customer reviews

2/2 Way Microfluidic Whisper Valve Type 6712

A compact microfluidic solenoid valve combining an internal volume of only 5 µL (incl. connectors), small dimensions and quiet switching with a response time of only 1 ms, for almost zero unused fluid and a reduced chance of contamination.
A separating diaphragm between the fluid and actuator gives maximum chemical resistance, making this valve a premium for a wide range of laboratory, medical and analysis applications.
Comes in a 2-way normally closed valve setup, with an optional 1/4-28 UNF manifold for easier connection.
Available within 3 weeks
€66.20
A compact microfluidic solenoid valve combining an internal volume of only 5 µL (incl. connectors), small dimensions and quiet switching with a response time of only 1 ms, for almost zero unused fluid and a reduced chance of contamination.
A separating diaphragm between the fluid and actuator gives maximum chemical resistance, making this valve a premium for a wide range of laboratory, medical and analysis applications.
Comes in a 2-way normally closed valve setup, with an optional 1/4-28 UNF manifold for easier connection.

Features

  • 2/2 way normally closed valve, 24V DC
  • Ultra-compact size (width 7 mm) and low dead volume of only 5 µL (including connections)
  • Response time of less than 1 ms for opening and closing
  • Quiet switching of 36 dB(A) for sensitive environments
  • Two versions: PEEK body with FFKM (Kalrez) seal or EPDM seal for wide chemical compatibility. Choose the second version if working with fluorinated oils.
  • For easier connection, the valve can be connected to a standard 1/4-28 UNF manifold in PEEK

Benefits

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. Control dosing volume with the utmost precision with a switching speed of 1 ms.

Droplet Generation

Create microfluidic droplets without the complicated flow control thanks to the high frequency switching that this valve is capable of.

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 is second to none, with a total internal volume of only 5 µL, for applications where material costs are high and the utmost precision and efficiency is needed.

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 three versions with PEEK body and FFKM seal or PPS body and EPDM 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.  

2/2 way valve (normally closed)

      

2/2 Way Whisper Valve Dimensions

1/4-28 UNF Manifold Dimensions

 

Orifice and pressure range 0.8 mm, 0-3 bar
Back pressure Max. 1.2 bar
Body material

PEEK

Seal material

FFKM

EPDM

Media temperature

+10 to +55 °C (FFKM version)

0 to +55 °C (EPDM version)

Typical service life 30.000.000
Internal volume

Fluid chamber: 2 µL

Total (incl. connections): 5 µL

Viscosity

Max. 21 mm²/s

Electrical connection

Single flying leads, AWG 26, 500 mm

Power supply

24 V DC

Voltage tolerance +/- 10%
Power consumption 0.9 W
Duty cycle 100% continuous operation
Installation As required, preferably with actuator upright
Protection class IP40 acc. IEC 60144
Response times (measured at valve outlet with air at 3 bar and +20 °C) FFKM version:
  • Opening: 0.7 ms (pressure rise 0 to 10%)
  • Closing: 1.0 ms (pressure drop 100 to 90%)

EPDM version:

  • Opening: 0.5 ms (pressure rise 0 to 10%)
  • Closing: 0.9 ms (pressure drop 100 to 90%)
Switching frequency 50 Hz
Switching noise 36 dB(A)
Approvals and compliance on request
  • Suitability for drinking water: KTW (W270)
  • Suitability for foodstuffs: FDA
  

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

A simple 2/2-way microvalve can 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. 

 

    Payment Terms

    You can either order and pay via credit card or invoice (through a purchase order). Please note that some products are not available for direct purchase: just click "Request a Quote" on the product page and fill in the form to get more informations!

    Credit card 

    • Add your products to the cart
    • In the cart page, click on Proceed to Checkout
    • Complete your credit card informations (don't worry, we are using Stripe, a PCI-certified program specialized in online transactions)
    • That's it! You will receive an order confirmation within a few minutes, and our team will send you the invoice.

    Invoice

    • Add your products to the cart
    • In the website header, click on Request a Quote
    • Fill in the required informations, then click on Submit Quote
    • Our team will send you a quote shortly
    • After receiving the quote, just send your purchase order at contact@darwin-microfluidics.com
    • Our team will complete your purchase and send you the invoice!

    If you wish to pay in USD, AUD or GBP, please specify it in your PO. We can add the converted value in the required currency to the quote if requested.

     

    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! 

    Please note that our shipping incoterms are DAP (Delivered At Place). Please contact us if you prefer using your own courrier account or have any question!