2/2 or 3/2 Way Whisper Valve Type 6724
- Product SKU: BU-281933
- Category: Bürkert, Microfluidic Valves, Solenoid Valves
Bürkert Whisper valve 6724 combines high chemical resistance, very fast and silent switching (3 ms at 30 dB(A)) and high back pressure tightness in a compact design of only 8.9 mm width.
This valve is either available with a Bürkert flange for connection to a manifold, or threaded 1/4-28 UNF version for tighter connection with fittings.
Connector with flying leads available for direct electrical connection.
Whisper Valve Type 6724
- High chemical resistance: body in PEEK, seal in FFKM (Kalrez)
- Compact design: 9 mm width (valve only)
- Orifice diameter: 0.8 mm or 1.2 mm
-
Switching time of 3 ms, switching noise < 30 dB(A) and power consumption < 1 W
- High back pressure tightness
- Excellent cleanability
- 100% duty cycle
- Voltage: 24V DC
- Port connections with Bürkert flange forthe connection to a manifold or 1/4-28 UNF for easier connection to the fluidic line
Characteristics
- Rocker valve with separating diaphragm
- Body in PEEK, seal in FFKM (Kalrez) for broad chemical compatibility
- 24V DC voltage
| Reference | Function | Orifice (mm) | Port connection | Kv value water (m3/h) | Cv value water (gpm) | QNn value air (L/min) | Pressure range (bar) |
| 299245 | 2/2 NC | 0.8 mm | Bürkert flange (9 x 26) | 0.01 | 0.012 | 10.7 | 0 - 5 |
| 299246 | 2/2 NC | 0.8 mm | 1/4-28 UNF | 0.01 | 0.012 | 10.7 | 0 - 5 |
| 281506 |
2/2 NC |
1.2 mm | Bürkert flange (9 x 26) |
0.026 | 0.03 | 28 | 0 - 3 |
| 281933 |
2/2 NC |
1.2 mm | 1/4-28 UNF | 0.026 | 0.03 | 28 | 0 - 3 |
| 300024 | 2/2 NO | 0.8 mm | Bürkert flange (9 x 26) | ||||
| 347565 | 2/2 NO | 0.8 mm | 1/4-28 UNF | ||||
| 281507 | 2/2 NO | 1.2 mm | Bürkert flange (9 x 26) | 0.026 | 0.03 | 28 | 0 - 2 |
| 292443 | 2/2 NO | 1.2 mm | 1/4-28 UNF | ||||
| 299249 | 3/2 | 0.8 mm | Bürkert flange (9 x 26) | 0.01 | 0.012 | 10.7 | 0 - 3 |
| 299250 | 3/2 | 0.8 mm | 1/4-28 UNF | 0.01 | 0.012 | 10.7 | 0 - 3 |
| 276458 | 3/2 | 1.2 mm | Bürkert flange (9 x 26) | 0.026 | 0.03 | 28 | 0 - 2 |
| 280888 |
3/2 |
1.2 mm | 1/4-28 UNF | 0.026 | 0.03 | 28 | 0 - 2 |
More information in the brochure.
Dimensions
Dimensions of the Bürkert flange version (left) and 1/4-28 UNF version (right)
Specifications
| Body material | PEEK |
| Seal material | FFKM (Kalrez) |
| Media temperature | +15 °C to 50 °C |
| Typical service life | 10.000.000 |
|
Internal volume |
Bürkert flange (9 x 26): approx. 38 µl 1/4-28 UNF: approx. 59 µl |
| Viscosity |
Max. 21 mm²/s |
| Port connection |
Bürkert flange (9 x 26) or 1/4-28 UNF |
| Electrical connection |
Plug Raster 2 mm (socket with flying leads available) |
| Power supply |
24 V DC |
| Voltage tolerance | +/- 10% |
| Power consumption | 1 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) | Measurement at valve output with 2 bar and 20 °C acc. to DIN ISO 12238:2001
|
| Switching frequency | - |
| Switching noise | 30 dB(A) |
| Approvals and compliance (on request) |
|
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