The BURKERT 360813 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; additional actuation modules are not necessary. The motor does not need any energy to maintain a certain valve opening. This feature can reduce the energy consumption of a plant dramatically and therefore make it more efficient.

Type 3280 is available as an on/off valve or proportional valve by default, as a variant with an integrated positioner, and as a variant with an integrated process controller.

Device Versions

• Standard (On/Off or Control Valve): Converts an external standard signal into a valve position. Both valve end positions are indicated by the LED status.
• Positioner: Converts a set-point position to a valve position. The position of the actuator is controlled according to the position set-point value.
• Process Controller: 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.

General Technical Data

Property	Value
Orifice	DN 8...DN 15, NPS 1/4, 3/8, 1/2
Body Material	Brass, stainless steel
Seal Material	NBR, EPDM, FKM
Operating Pressure	0...6 bar(g) (High pressure variant up to 22 bar(g) optionally available)
Operating Voltage	24 V DC ± 10% (max. residual ripple 10%)
Power Consumption	<1 W in holding position; Max. 8 W to 12 W depending on DN
Degree of Protection	IP54

Materials

• Actuator: Housing cover (PC), Housing base (PPS)
• Valve Body: Spindle seal (FKM/EPDM/NBR), Spindle (Stainless steel 1.4305), Seat (Stainless steel 1.4301/1.4305), Valve body (Brass or stainless steel AISI 316L)

Performance Specifications

Duty Cycle Derating

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.

WARNING

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

Flow Characteristic

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.