The Burkert solenoid valve Type 6281 with article number 221982 is a servo-assisted diaphragm valve, 2/2-way, normally closed (NC). This version has a stainless steel body with internal thread G1 1/4, orifice DN 25 and NBR seals.
How the diaphragm valve Type 6281 works
When de-energised, the flow path from port 1 (P) to port 2 (A) is closed; the valve only opens when the coil is energised. As a servo-assisted diaphragm valve, Type 6281 uses the medium pressure to switch. A minimum differential pressure of 0.2 bar is required, and according to the data sheet 0.5 bar to open the full cross-section; the pressure range of this version extends to 16 bar. The valve closes with damping and operates quietly. The Kv value for water is 12 m³/h. According to Burkert, this version opens in 120–1500 ms and closes in 200–3500 ms.
Coil and electrical connection of Type 6281
The coil for 230 V AC 50/60 Hz (32 mm, encapsulated in polyamide) sits on the vibration-proof, centrally screwed coil system. The AC coil draws 24 VA at switch-on and 14 VA in holding mode; the rated power is 8 W. It is connected via plug contacts to DIN EN 175301-803 form A; with a cable plug, the valve achieves IP65. The cable plug Type 2518 is not included and available separately.
Technical data at a glance
Circuit function A, 2/2-way, normally closed (NC) · Orifice DN 25 · Port connection internal thread G1 1/4 · Pressure range 0.2–16 bar · Kv value water 12 m³/h · Body stainless steel · Seal NBR · Medium temperature -10 °C to +80 °C · Ambient temperature max. +55 °C · Voltage 230 V AC 50/60 Hz ±10 % · Rated power 8 W · Plug form A · IP65 with cable plug · Duty cycle 100 % · Installation length 95 mm · Weight 1.445 kg
Applications of Burkert Type 6281
According to the data sheet, it switches media that do not attack the body and seal materials. It can be installed in any position, preferably with the actuator facing up. As a dealer listed by Burkert, we source the valve directly from the manufacturer.
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