The Burkert 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 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 well as variants with an integrated positioner or process controller.

• Actuator is not wetted: Ensures media compatibility and longevity.
• Excellent setting range and fast reaction time: Provides precise control.
• Low electrical power consumption: Energy-efficient operation.
• Connection orifice: DN 8 to 15.
• Variants: Standard, positioner, process controller, and high-pressure variants for up to 22 bar.

General Technical Data

Property	Description
Seal	NBR for liquids EPDM for liquids and special gases (e.g., ammonia, acetylene) FKM for neutral gases
Valve body	Brass, stainless steel
Orifice	DN 8...DN 15, 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) High pressure variant up to 22 bar(g) optionally available Vacuum variant up to -0.9 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 2...DN 6) resp. max. 12 W (DN 8 and DN 10, as well as high-pressure variants)
Medium temperature	EPDM: -30 °C...+70 °C FKM, NBR: 0 °C...+70 °C
Viscosity	Max. 600 mm²/s (cSt)
Degree of protection	IP54

Materials

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

WARNING

Operating the valve outside the recommended duty cycle limits will result in a significantly reduced service life of the valve.

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 following diagram shows the recommended maximum duty cycle as a function of the ambient temperature.

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

Product Operation

Process Diagram

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. If there is a control difference (Xd1), a motor control signal is given to the actuator as the actuating variable.

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). The process setpoint can be specified by an external signal.

Safety Instructions

DANGER

Risk of injury from high pressure in the system or device. Before working on the system or device, cut off the pressure and deaerate/drain lines.

Risk of injury due to electrical shock. Before working on the system or device, switch off and isolate the power supply to prevent reactivation of the device. Observe applicable accident prevention and safety regulations for electrical equipment.