Burkert Type 3280 direct-acting electromotive 2-way globe proportional valve is 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 requires no energy to maintain a specific valve opening, which can dramatically reduce the energy consumption of a plant and improve efficiency. Type 3280 is available as a standard on/off or proportional valve, as a variant with an integrated positioner, and as a variant with an integrated process controller.

General Technical Data

Property	Value
Orifice	DN 1 to DN 10, NPS 1/4, 3/8, 1/2
Flow direction	Against closing direction (below seat)
Design	Globe on/off valve, Globe control valve
Weight	~0.7 kg
Operating pressure	0...6 bar(g) (Standard); High pressure variant up to 22 bar(g) optionally available
Duty cycle	Up to 100% (depending on medium and ambient temperature)
Operating voltage	24 V DC ± 10% (max. residual ripple 10%)
Power consumption	<1 W in holding position; Max. 8 W (DN 1...DN 6) resp. max. 12 W (DN 8 and DN 10, as well as high-pressure variants)
Operating medium	Neutral gases and liquids
Medium temperature	EPDM: -30 °C...+70 °C; FKM, NBR: 0 °C...+70 °C
Ambient temperature	-10 °C...+60 °C (Derating applies)
Degree of protection	IP54

Materials

Note

The globe control valve Type 3280 is supplied with various port connections. These connections are not shown completely. However, they correspond to the material of the valve housing.

Actuator

No.	Element	Material
1	Housing cover	PC (Polycarbonate)
2	Housing base	PPS (Polyphenylenesulfide)

Valve body

No.	Element	Material
3	Spindle seal	FKM/EPDM/NBR
4	Spindle	Stainless steel 1.4305
5	Upper valve body	Brass or stainless steel 1.4305
6	Piston with parabolic control element	PTFE / Stainless steel 1.4305
7	Elastomer seat seal	FKM/EPDM/NBR
8	O-ring	FKM/EPDM/NBR
9	Seat	Stainless steel 1.4301/1.4305
10	Valve body	Brass or stainless steel AISI 316L

Dimensions

Threaded Variant

A	B	C	D	E	F	G	H
-	-	12	G 3/8	97.4	137.2	12	27.5
6	10.3	-	NPT 3/8	97.4	137.2	12	27.5
-	-	12	G 1/4	96.4	134.2	10	27.5
5.8	10	-	NPT 1/4	96.4	134.2	10	27.5
-	-	14	G 1/2	97.4	139.2	14	29.5
8.2	13.7	-	NPT 1/2	97.4	139.2	14	29.5

Performance Specifications

Duty Cycle Derating

Note

• 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.
• The duty cycle does not mean the duty cycle of the device but the duty cycle of the motor. This is only switched on when the valve is to move.
• Operating the valve outside the recommended duty cycle limits will result in a significantly reduced service life of the valve.

Pressure Range

Standard Variant

Valve function	Seat size	Port connection	Kvs-value [m³/h]	Pressure range [bar(g)]
Control valve, without safety position in case of power failure	1	G 1/4	0.030	0...6
	1.5	G 1/4	0.065	0...6
	2	G 1/4	0.130	0...6
	3	G 1/4	0.300	0...6
	4	G 3/8	0.500	0...6
	5	G 3/8	0.750	0...6
	6	G 3/8	0.900	0...6
	8	G 1/2	1.500	0...6
	10	G 1/2	1.900	0...6

High-Pressure Variant

Valve function	Seat size	Port connection	Kvs-value [m³/h]	Pressure range fluid media [bar(g)]	Pressure range gaseous media [bar(g)]
Control valve, without safety position in case of power failure	1	G 1/4	0.030	0...15	0...22
	1.5	G 1/4	0.065	0...15	0...22
	2	G 3/8	0.130	0...15	0...22
	3	G 3/8	0.300	0...15	0...22
	4	G 3/8	0.500	0...12	0...12
	5	G 3/8	0.750	0...12	0...12
	6	G 3/8	0.900	0...15	0...16
	8	G 1/2	1.500	0...12	0...12
	10	G 1/2	1.900	0...10	0...10

Flow Characteristic

Note

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

Standard on/off valve In the on/off variant, an external voltage signal is digitized and the valve is closed or opened. The status of the two end positions of the valve are indicated on the LED. In addition, the valve position "closed" is reached via the digital output.

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.

Positioner variant The proportional valve in the position control variant converts an external standard signal, the position set-point value, into a valve position. The position of the actuator is controlled according to the set-point position. The position sensor records the current position (POS) of the electromotive valve. This actual position is compared by the positioner with the set-point value (CMD) specified as the standard signal.

Process controller variant The additionally implemented PID controller can perform not only the actual position control but also a process control in the sense of a cascade control. The position setpoint of the valve is calculated from the process setpoint and the actual process value via the control parameters (PID controller).

Electrical Connection

Pin assignment analogue (Circular plug M12, 8-pin)

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

Pin assignment digital / fieldbus (Circular plug M12, 5-pin)

Pin	Configuration
1	Shield
2	24 V DC
3	GND
4	CAN_H
5	CAN_L