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.
General
The Bürkert 6712 whisper valve was developed for applications where compactness, precision at low flows, and reliability are required.
- 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
- PEEK body with FFKM (Kalrez) seal
- For easier connection, the valve can be connected to a standard 1/4-28 UNF manifold in PEEK
| Previous reference |
New reference |
| BU-267651 |
BU-00273235 |
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, optimized 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 are 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 PEEK body and FFKM seal this valve has a great 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.
Specifications
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
|
| Media temperature |
+10 to +55 °C (FFKM version)
|
| Typical service life |
30.000.000 h |
| 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%)
|
| Switching frequency |
50 Hz |
| Switching noise |
36 dB(A) |
| Approvals and compliance on request |
- Suitability for drinking water: KTW (W270)
- Suitability for foodstuffs: FDA
|
Documentation
Data sheet valve 6712
