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2/2 Way NC Whisper Valve Type 6724

Bürkert Whisper normally closed valve 6724 2/2 NC 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 or a tube connector.
Connector with flying leads available for direct electrical connection.
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General

A compact and light solenoid valve for various applications, from medical to aerospace. Thanks to its small size, it can be easily integrated into complex systems or used to manipulate low fluid volumes. The 6724 is on/off or proportional: use it as a standard 2/2 NC, or to control the flow rate if necessary.

  • Rocker valve with separating diaphragm
  • High chemical resistance: body in PEEK or PPS, seal in FFKM, KFM or EPDM
  • 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 for the connection to a manifold or 1/4-28 UNF for easier connection to the fluidic line or Tube connector

See all the valve characteristics in the "Specifications" and "Documentation" tabs.

Reference  Function Orifice (mm) Port connection Kv value water (m3/h) Cv value water (gpm) QNn value air (L/min) Pressure range (bar) Body material
Seal material
BU-20034162 2/2 NC 0.8 mm Bürkert sub-base (9 x 26) 0.01 0.012 10.7 0 - 5 PEEK
FFKM
BU-20071068 2/2 NC 0.8 mm 1/4-28 UNF 0.01 0.012 10.7 0 - 5 PEEK FFKM
BU-20071070 2/2 NC 0.8 mm
Bürkert sub-base (9 x 26) 0.01 0.012 10.7 0 - 5
PPS
FKM

BU-

20037617

2/2 NC 0.8 mm
1/4-28 UNF 0.01 0.012 10.7 0 - 5 PPS EPDM
BU-20071048 2/2 NC 1.2 mm Bürkert sub-base (9 x 26) 0.026 0.03 28 0 - 3 PPS FKM
BU-20037618 2/2 NC 1.2 mm Bürkert sub-base (9 x 26) 0.026 0.03 28 0 - 3 PPS EPDM
BU-20071231 2/2 NC 0.8 mm Tube connector 0.01 0.012 10.7 0 - 5 PEEK FFKM
BU-20071233 2/2 NC 0.8 mm Tube connector 0.01 0.012
10.7
0 - 5
PEEK
EPDM

 

Previous reference New reference
BU-20071045 BU-20034162
BU-299246 BU-20071068
Specifications

Bürkert Whisper Valve Type 6724 Dimensions - Darwin Microfluidics

Dimensions of the Bürkert flange version (left) and 1/4-28 UNF version (right)

Body material PEEK or PPS
Seal material FFKM, KFM or EPDM
Media temperature

FFKM 15 °C to 50 °C

FKM 0°C to 50°C

EPDM 0°C to 50°C"

Typical service life 10.000.000
Internal volume

Bürkert sub-base (9 x 26):  approx. 38 µl

Threaded version UNF ¼"- 28: approx. 59 µl

Tube connector: approx. 68 µl

Viscosity

Max. 21 mm²/s

Port connection

Bürkert flange (9 x 26) or Threaded version UNF ¼"- 28 or Tube connector

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
  • Opening: 3 ms (pressure rise 0 to 10%)
  • Closing: 3 ms (pressure drop 100 to 90%)
Switching frequency -
Switching noise 30 dB(A)
Approvals and compliance (on request)
  • Suitable for food industry: FDA
  • Suitable for drinking water: KTW (W270)
  • Oxygen application: BAM

 

Your Question Answered

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Please ensure your VAT identification number is provided during the ordering process for EU transactions to qualify for the reverse charge mechanism. If you have any questions regarding VAT charges or need further assistance with VAT-related issues, please contact our customer service team.

We are unable to provide specific estimates for customs fees, duties, or taxes associated with your order. These charges are determined by the customs authority in your country and can vary based on a variety of factors, including the type of items purchased, their value, and the country to which they are being shipped.

We recommend contacting your local customs office directly to get the most accurate and up-to-date information regarding potential customs charges for your order. They can provide you with detailed guidelines on the fees you might expect to pay based on the products you're importing from us.

Please remember, these charges are the responsibility of the recipient and are not included in the shipping costs paid to Darwin Microfluidics.

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8 options for this product

2/2 Way NC Whisper Valve Type 6724
2/2 Way NC Whisper Valve Type 6724
SKU: BU-20071068
1/4-28 UNF
PEEK/FFKM
0.8 mm
£122.49
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Available immediately
Out of stock
2/2 Way NC Whisper Valve Type 6724
2/2 Way NC Whisper Valve Type 6724
SKU: BU-20034162
Sub-base (9 x 26)
PEEK/FFKM
0.8 mm
£104.72
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Available immediately
Out of stock
2/2 Way NC Whisper Valve Type 6724
2/2 Way NC Whisper Valve Type 6724
SKU: BU-20071070
Sub-base (9 x 26)
PPS/FKM
0.8 mm
£81.16
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Available immediately
Out of stock
2/2 Way NC Whisper Valve Type 6724
2/2 Way NC Whisper Valve Type 6724
SKU: BU-20071048
Sub-base (9 x 26)
PPS/FKM
1.2 mm
£81.16
Login to request a quote
Available immediately
Out of stock
2/2 Way NC Whisper Valve Type 6724
2/2 Way NC Whisper Valve Type 6724
SKU: BU-20037618
Sub-base (9 x 26)
PPS/EPDM
1.2 mm
£73.77
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Available immediately
Out of stock
2/2 Way NC Whisper Valve Type 6724
2/2 Way NC Whisper Valve Type 6724
SKU: BU-20071231
Tube connector
PEEK/FFKM
0.8 mm
£117.81
Login to request a quote
Available immediately
Out of stock
2/2 Way NC Whisper Valve Type 6724
2/2 Way NC Whisper Valve Type 6724
SKU: BU-20071233
Tube connector
PEEK/EPDM
0.8 mm
£93.22
Login to request a quote
Available immediately
Out of stock
2/2 Way NC Whisper Valve Type 6724
2/2 Way NC Whisper Valve Type 6724
SKU: BU-20037617
Sub-base (9 x 26)
PPS/EPDM
0.8 mm
£73.77
Login to request a quote
Available immediately
Out of stock
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