BURKERT 20061314 (Type 3280) is an electromotive direct-acting 2-way globe proportional control valve designed for dosing neutral liquids and gases in open or closed control loops. Driven by a linear stepper motor via a threaded spindle, the valve continuously repositions a parabolic control cone against media flow entering below the valve seat. Article 20061314 features a G 1/4 threaded brass body, a 1.5 mm nominal seat diameter (Kv 0.065 m³/h), a PEEK seat seal backed by EPDM elastomer, and an integrated electronic assembly operating from 24 V DC.

Maintaining a set valve position does not require motor power; holding power drops below 1 W once positioned. The unit responds to an 800 Hz PWM set-point command and provides a PNP digital output signal confirming the fully closed end position.

Technical Specifications

Parameter	Value
Article Number	20061314
Model Family	Type 3280
Design	Electromotive 2-way direct-acting globe control valve
Port Connection	G 1/4 internal thread (EN ISO 228-1)
Seat Orifice DN	1.5 mm (1/16")
Kv Value (Water, +20 °C, Δp = 1 bar)	0.065 m³/h
Flow Direction	Under seat (flow against closing direction)
Operating Pressure Range	0...15 bar(g) for fluid media; 0...22 bar(g) for gaseous media
Supply Voltage	24 V DC ±10% (max. residual ripple 10%)
Power Consumption	< 1 W holding position; max. 12 W (high-pressure variant)
Set-point Input Signal	PWM signal (800 Hz, 24 V logic level, min. 10 V, max. 30 V)
Digital Feedback Output	PNP, max. 100 mA current limit, active when valve is closed
Actuating Time (0...100% stroke)	Approx. 2.5 s (normal speed) / 5 s (slow speed)
Dead Band	±0.5% of end value (setting range 1:100)
Duty Cycle	Up to 100% (subject to ambient temperature derating)
Medium Temperature Range	0 °C...+70 °C
Permissible Ambient Temperature	-10 °C...+50 °C (for high-pressure specification)
Max. Medium Viscosity	600 mm²/s (cSt)
Degree of Protection	IP54 (with suitable connected cable plug)
Weight	Approx. 0.7 kg

Construction and Material Specifications

The actuator housing isolates electronic and electromechanical components from the process medium. Linear force is delivered by the stepper motor via an internal threaded spindle coupled to the valve stem.

Item No.	Component	Material
1	Actuator Housing Cover	Polycarbonate (PC GF10)
2	Actuator Housing Base	Polyphenylene sulphide (PPS GF40)
3	Stem Seal	EPDM / FKM / NBR
4	Spindle	Stainless steel 1.4305
5	Upper Valve Body	Brass
6	Piston with Parabolic Control Element & Guiding Shaft	Stainless steel 1.4305 / PTFE
7	Seat Seal	PEEK (seat size 1.5 mm) backed by EPDM
8	O-ring	EPDM
9	Valve Seat	Stainless steel 1.4301 / 1.4305
10	Valve Body	Brass

Seat Tightness Note for Seat Size 1.5 mm

For seat sizes 1.0 mm and 1.5 mm, PEEK seat seals are used instead of soft elastomeric discs. The seat tightness of the valve is consequently lower compared to pure elastomer seals.

Electrical Connection and DIP Switch Settings

Electrical connection is established through an 8-pin A-coded M12 circular male connector located on the actuator base. Input/output signals share supply potential without galvanic isolation.

M12 Pin	Wire Color (Cable 919061)	Configuration	Function / Signal Level
1	White	Supply +	24 V DC ±10%, max. residual ripple 10%
2	Brown	Supply GND	24 V DC GND
3	Green	Internal use	Do not connect; insulate wire
4	Yellow	Internal use	Do not connect; insulate wire
5	Grey	Internal use	Do not connect; insulate wire
6	Pink	Set-point input +	PWM input (800 Hz) / 4...20 mA / 0...10 V
7	Blue	Digital output	PNP, 0...5 V (log. 0), 10...30 V (log. 1, closed)
8	Red	Signal GND	Signal reference GND
Body	Shield	Shielding	Connected to valve body

Configuration parameters are accessible via a 4-pole internal DIP switch block on the electronics board after loosening the actuator housing cover:

DIP Switch	Position	PWM Version Function	Standard Analog Function
1	OFF	Increasing: 0...100% PWM duty cycle corresponds to 0...100% stroke	Normal: 4...20 mA corresponds to 0...100% stroke
1	ON	Decreasing: 100...0% PWM duty cycle corresponds to 0...100% stroke	Reversal: 20...4 mA corresponds to 0...100% stroke
2	OFF	No function	Set-point input 4...20 mA
2	ON	No function	Set-point input 0...10 V
3	OFF	Actuating speed normal (0...100% in 2.5 s)	Actuating speed normal (0...100% in 2.5 s)
3	ON	Actuating speed slow (0...100% in 5.0 s)	Actuating speed slow (0...100% in 5.0 s)
4	OFF	Low power mode: OFF	Low power mode: OFF
4	ON	Low power mode: ON (reduced holding force/heating)	Low power mode: ON (reduced holding force/heating)

Low Power Mode Pressure Restriction

Activating DIP switch 4 reduces motor drive current, lowering operating heat. This setting must only be enabled when differential pressure across the valve does not exceed 1 bar and maximum media pressure does not exceed 3 bar. Exceeding these limits will cause positioning failure.

Performance, Pressure, and Flow Characteristics

The motor valve produces a linear operating characteristic when sized properly relative to total circuit friction.

Pressure Ranges by Orifice Size

Orifice Seat Size (mm)	Port Connection	Kvs Value (m³/h)	Standard Pressure Range (bar)	High-Pressure Liquids (bar)	High-Pressure Gases (bar)
1.0	G 1/4	0.030	0...6	0...15	0...22
1.5 (20061314)	G 1/4	0.065	0...6	0...15	0...22
2.0	G 1/4, G 3/8	0.130	0...6	0...15	0...22
3.0	G 1/4, G 3/8	0.300	0...6	0...15	0...22
4.0	G 3/8	0.500	0...6	0...12	0...12
5.0	G 3/8	0.750	0...6	0...12	0...12
6.0	G 3/8	0.900	0...6	0...15	0...16
8.0	G 1/2	1.500	0...6	0...12	0...12
10.0	G 1/2	1.900	0...6	0...10	0...10

Flow Calculation and Seat Dimensioning

Select the seat diameter so that valve pressure drop represents at least 25% of the total system pressure loss (Δp_valve > 0.25 · Δp_total). A smaller pressure drop causes the linear characteristic to deform into a non-linear system response.

Flow Coefficient Formulae

Flow Condition	Liquids Kv [m³/h]	Gases Kv [m³/h]
Sub-critical: $p_2 > \frac{p_1}{2}$	$Q \cdot \sqrt{\frac{\rho}{1000 \cdot \Delta p}}$	$\frac{Q_N}{514} \cdot \sqrt{\frac{T_1 \cdot \rho_N}{p_2 \cdot \Delta p}}$
Supercritical: $p_2 < \frac{p_1}{2}$	$Q \cdot \sqrt{\frac{\rho}{1000 \cdot \Delta p}}$	$\frac{Q_N}{257 \cdot p_1} \cdot \sqrt{T_1 \cdot \rho_N}$

Motor Duty Cycle Derating

Motor duty cycle designates the operational active running time of the stepper drive, not the continuous energized duration of the electronic assembly.

Operating above recommended duty cycle percentages causes thermal overload. At an ambient temperature of +50 °C, the permissible motor duty cycle for standard seats DN 1...6 is derated, requiring lower continuous cycling rates.

Dimensions

Dimensions for threaded body variants in millimetres:

Port D	A (NPT)	B (NPT)	C (G thread)	Dimension E (mm)	Dimension F (mm)	Dimension G (mm)	Dimension H (mm)
G 1/4 (20061314)	—	—	12	96.4	134.2	10	27.5
NPT 1/4	5.8	10.0	—	96.4	134.2	10	27.5
G 3/8	—	—	12	97.4	137.2	12	27.5
NPT 3/8	6.0	10.3	—	97.4	137.2	12	27.5
G 1/2	—	—	14	97.4	139.2	14	29.5
NPT 1/2	8.2	13.7	—	97.4	139.2	14	29.5

Accessories and Safety Position in Case of Power Failure

During an interruption of electrical power, Type 3280 retains its instantaneous physical position. Moving to a fail-safe position requires an external capacitive buffer module.

Accessory Description	Specification / Function	Article No.
Capacitive Buffer Module Type 1573	Supplies 18 V DC backup for several seconds upon power failure to drive valve closed	773440
Power Supply Unit Phoenix Class 2	85...240 V AC / 24 V DC, 1.25 A, NEC Class 2 (UL 1310)	772438
Power Supply Unit for DIN Rail	100...240 V AC / 24 V DC, 1.0 A, NEC Class 2	772361
Power Supply Unit for DIN Rail	100...240 V AC / 24 V DC, 2.0 A, NEC Class 2	772362
Power Supply Unit for DIN Rail	100...240 V AC / 24 V DC, 3.8 A, NEC Class 2	772898
M12 Shielded Cable Socket, 8-pin	Cable length: 2 m, flying leads for analog/digital I/O	918991
M12 Unshielded Cable Socket, 8-pin	Cable length: 2 m, flying leads for analog/digital I/O	919061

Installation and Maintenance

Mount the valve preferably in an upright vertical position with the actuator cover pointing upwards. The flow direction must correspond to the arrow on the brass body (fluid entering under the seat).

Upstream Media Filtration

Solid particulates in the fluid stream can cause seat leakage or mechanical blockage. Install an upstream dirt filter with a mesh width ≤ 0.3 mm before the valve inlet.

When tightening port fittings, apply wrench counterforce only to the brass valve body flats. Never use the plastic actuator housing as a lever arm. Clean housing surfaces with damp cloths and neutral detergents; alkaline cleaning agents must not be used on PPS or PC components.