BURKERT 379024 (Type 3280) is a direct-acting electromotive 2-way globe proportional valve suitable for dosing liquids and gases in closed or open control loops. The valve is driven by a linear stepper motor. The integrated electronics assembly simplifies process integration, eliminating the need for additional actuation modules. The motor does not require energy to maintain a specific valve opening, which can dramatically reduce the energy consumption of a plant and improve efficiency.

This specific model features a G 1/4" internal thread, a 1 mm nominal seat diameter, and a Kv value of 0.03 m³/h. It operates on 24 V DC and accepts a 4-20 mA analog input signal for precise control.

General Technical Data

Property	Specification
Orifice	DN 1 mm (1/32")
Port Connection	G 1/4" Internal thread
Flow Direction	Against closing direction (below seat)
Design	Globe control valve
Operating Pressure	0...6 bar(g)
Kv Value (Water)	0.03 m³/h
Operating Voltage	24 V DC ± 10% (max. residual ripple 10%)
Power Consumption	<1 W in holding position; Max. 8 W
Medium Temperature	0 °C to +70 °C
Ambient Temperature	-10 °C to +60 °C (Observe derating)
Degree of Protection	IP54

Materials

No.	Element	Material
1	Housing cover	PC (Polycarbonate)
2	Housing base	PPS (Polyphenylenesulfide)
3	Spindle seal	EPDM
4	Spindle	Stainless steel 1.4305
5	Upper valve body	Stainless steel 1.4305
6	Piston with parabolic control element	PTFE / Stainless steel 1.4305
7	Elastomer seat seal	PEEK / EPDM
8	O-ring	EPDM
9	Seat	Stainless steel 1.4301/1.4305
10	Valve body	Stainless steel AISI 316L

INFO

For seat sizes 1 and 1.5, PEEK seat seals are used. In this case, the seat tightness of the valve is reduced.

Dimensions

Threaded Variant

Electrical Connection

Pin Assignment Analogue

Pin	Configuration
1	24 V DC
2	Power supply GND
3	Internal use
4	Internal use
5	Internal use
6	Signal input + (4-20 mA)
7	Signal output
8	Signal GND

Performance Specifications

Duty Cycle Derating

WARNING

The duty cycle is an important factor for motor valves. The self-heating of the engine limits the maximum duty cycle. High ambient temperatures additionally increase the risk of damage due to overheating. Operating the valve outside the recommended duty cycle limits will result in a significantly reduced service life of the valve.

Flow Characteristic

TIP

The dimensioning of the seat size is very important for electromotive proportional valves to function properly within the application. The seat size must be selected so that the desired flow range is achieved and, when the valve is fully open, a sufficient portion of the total pressure drop occurs across the valve (Reference value: Δp valve > 25% of the total pressure drop).

Product Operation

Process Diagram

Standard Control Valve: The standard proportional valve converts an external standard signal (position set-point value) into a valve position. Both valve end positions are indicated by the LED status. Additionally, the digital output indicates when the "closed" valve position has been achieved.