BURKERT 329197 (Type 3280) is an electromotive 2-way globe proportional control valve designed for metering and continuous flow regulation of neutral liquids and gases in open and closed loops. Driven by a linear stepper motor coupled directly to a threaded spindle and control cone, the unit executes positioning without external driver cards. The actuator draws less than 1 W in holding mode once the targeted stroke position is achieved, providing low operating electrical consumption across duty cycles up to 100%.

Configuration 329197 features a brass valve body with 1/2" NPT female process connections, a DN10 nominal orifice, and an EPDM seat seal. Flow passes under the valve seat, closing against the process fluid flow. Positioning relies on a continuous 4–20 mA analog input signal, and an active PNP digital output provides positive feedback whenever the valve reaches the fully closed position.

Technical Specifications

Parameter	Specification
Valve Design	Electromotive 2-way seat valve (Type 3280)
Article Number (Ident)	329197
Orifice Size (Nominal Seat Diameter)	DN10 (10 mm / 3/8")
Port Connection	1/2" NPT (ASME B1.20.1) internal thread
Valve Body Material	Brass
Seat Seal Material	EPDM (Ethylene-propylene-diene rubber)
Stem Seal Material	EPDM
Flow Direction	Under seat (closes against flow direction)
Flow Coefficient (Kvs)	1.9 m³/h (water at +20 °C, Δp = 1 bar)
Operating Pressure Range	0 to 6 bar(g)
Fluid Media	Neutral gases and liquids
Max. Viscosity	Up to 600 mm²/s (cSt)
Medium Temperature Range	0 °C to +70 °C (EPDM material limits -30 °C to +70 °C)
Ambient Temperature Range	-10 °C to +50 °C (standard DN1 to DN6 up to +60 °C; DN8/10 restricted to +50 °C)
Operating Voltage	24 V DC ±10% (max. residual ripple 10%)
Power Consumption	Standby: < 1 W; Operating: max. 12 W (DN8/DN10)
Actuating Time (0–100%)	Approx. 2.5 s (normal mode) / 5.0 s (slow mode)
Position Control Dead Band	±0.5% (span 1:100)
Setpoint Input	4–20 mA (switchable to 0–10 V via DIP switch 2)
Digital Output	PNP active, max. 100 mA current limit (valve closed feedback)
Electrical Connection	M12 circular connector, 8-pole, A-coded
Protection Class	IP54 (with matching mating connector attached)
Installation Position	Any orientation; preferably with actuator upright

Type 3280 Seat Diameter and Pressure Range Overview

Type 3280 standard valves operate over the 0 to 6 bar pressure range across seat diameters from DN1 to DN10:

Function	Seat Diameter (mm)	Standard Port Size	Kvs Value [m³/h]	Operating Pressure Range [bar(g)]
Proportional Control	1	G 1/4	0.030	0 to 6
Proportional Control	1.5	G 1/4	0.065	0 to 6
Proportional Control	2	G 1/4	0.130	0 to 6
Proportional Control	3	G 1/4	0.300	0 to 6
Proportional Control	4	G 3/8	0.500	0 to 6
Proportional Control	5	G 3/8	0.750	0 to 6
Proportional Control	6	G 3/8	0.900	0 to 6
Proportional Control	8	G 1/2	1.500	0 to 6
Proportional Control (329197)	10	G 1/2 / NPT 1/2	1.900	0 to 6

INFO

For article 329197, the port connection is 1/2" NPT internal thread with a DN10 orifice diameter and a rated Kvs of 1.9 m³/h.

Materials of Construction

The electromotive actuator is completely isolated from process fluid contact.

Item	Component	Material (Configuration 329197)	Alternate Material Options
1	Actuator Housing Cover	Polycarbonate (PC GF10)	—
2	Actuator Lower Housing	Polyphenylene sulphide (PPS GF40)	—
3	Stem Seal	EPDM	FKM, NBR
4	Valve Stem	Stainless steel 1.4305	—
5	Upper Body / Bonnet	Brass	Stainless steel 1.4305
6	Guided Piston with Control Cone	PTFE / Stainless steel 1.4305	—
7	Resilient Seat Seal	EPDM	FKM, NBR, PEEK (DN1/1.5)
8	O-Rings	EPDM	FKM, NBR
9	Valve Seat	Stainless steel 1.4301 / 1.4305	—
10	Valve Body	Brass	Stainless steel AISI 316L

Dimensions

Threaded Body Dimensions (mm)

Port Thread D	A (mm)	B (mm)	C (mm)	E (mm)	F (mm)	G (mm)	H (mm)
G 1/4	—	—	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 (329197)	8.2	13.7	—	97.4	139.2	14	29.5

Fixing threads on bottom of body: M4 with 4.5 mm thread depth. Total unit weight with stainless steel body is approximately 0.7 kg.

Electrical Interface and Wiring

BURKERT 329197 uses an integrated 8-pole M12 A-coded male connector. None of the electrical inputs or outputs are galvanically isolated from the 24 V DC supply voltage. The threaded metal sleeve of the connector connects internally to the body for EMC earthing.

Pin Assignment for Control Valve (M12 8-pole Male)

Pin	Core Color (Cable 919061)	Configuration	External Circuit / Signal Details
1	White	Supply +	24 V DC ±10%, max. residual ripple 10%
2	Brown	Supply GND	24 V DC GND
3	Green	Do not connect	Electrically isolate wire on connection cable
4	Yellow	Do not connect	Electrically isolate wire on connection cable
5	Grey	Do not connect	Electrically isolate wire on connection cable
6	Pink	Setpoint value input +	4–20 mA (or 0–10 V), not galvanically isolated
7	Blue	Digital output	PNP active (0/24 V), max. 100 mA current limit; logic 1 (10–30 V) when valve is closed
8	Red	Signal GND	Signal GND
Body	Shielding	Cable shield	Connect to earthing point via short, large-cross-section lead

WARNING

Do not connect pins 3, 4, or 5 on standard control valve models. Ensure loose wire ends in accessory cables are insulated to prevent control board damage.

Internal DIP Switch Configuration

Standard control valve parameters can be adjusted via 4 DIP switches located on the internal control PCB under the actuator housing cover:

DIP Switch	Position	Function on Standard Control Valve
1	OFF	Normal operating direction: increasing setpoint (4 to 20 mA) opens the valve (0 to 100%)
1	ON	Inverted operating direction: decreasing setpoint (20 to 4 mA) opens the valve (0 to 100%)
2	OFF	Setpoint input calibrated for 4 to 20 mA current signal
2	ON	Setpoint input calibrated for 0 to 10 V voltage signal
3	OFF	Actuating speed normal mode: approx. 2.5 s for 0 to 100% stroke
3	ON	Actuating speed slow mode: approx. 5.0 s for 0 to 100% stroke
4	OFF	Low power function disabled (full actuator torque)
4	ON	Low power function enabled: reduced motor current and heat generation; restricted to max. 3 bar medium pressure and max. 1 bar differential pressure

Actuator Cover Removal and Tightening

To access DIP switches, isolate the power supply, loosen the four non-losable housing screws, and support the lower connection plate so it does not drop. When reassembling, verify that internal wires are not pinched and tighten screws to 2 Nm.

Flow Characteristics and Valve Sizing

Type 3280 maintains a linear flow characteristic across its positioning stroke. Proper orifice sizing ensures that the valve retains controllability without turning the linear valve curve into a distorted system characteristic.

$$\Delta p_{\text{valve}} > 25% \text{ of total system pressure drop}$$

Flow Equations for Kv Determination

Pressure Drop State	Liquid Medium (Kv in m³/h)	Gaseous Medium (Kv in m³/h)
Subcritical ($p_2 > \frac{p_1}{2}$)	$K_v = Q \sqrt{\frac{\rho}{1000 \Delta p}}$	$K_v = \frac{Q_N}{514} \sqrt{\frac{T_1 \rho_N}{p_2 \Delta p}}$
Supercritical ($p_2 < \frac{p_1}{2}$)	$K_v = Q \sqrt{\frac{\rho}{1000 \Delta p}}$	$K_v = \frac{Q_N}{257 p_1} \sqrt{T_1 \rho_N}$

Where $Q$ is liquid volume flow in m³/h, $Q_N$ is gas flow in m³N/h at standard conditions (+0 °C, 1.013 bar), $p_1$ is inlet pressure in bar absolute, $p_2$ is outlet pressure in bar absolute, $\Delta p = p_1 - p_2$, $\rho$ is liquid density in kg/m³, $\rho_N$ is gas standard density in kg/m³, and $T_1$ is temperature in Kelvin (273 + t).

LED Operating Status Indicators

An integrated LED indicator on the actuator housing communicates operational status:

LED Color	State	Operating Meaning
White	Continuously lit	Normal operating mode
Yellow	Continuously lit	Valve is fully open (100% stroke)
Yellow	Flashing (alternating)	Out of specification: ambient or fluid conditions outside allowable limits
Green	Continuously lit	Valve is fully closed (0% stroke)
Red	Flashing	Error detected (signal < 4 mA, excessive voltage ripple, overtemperature, or motor stall)
Orange	Flashing	Function check in progress
LED Off	Off	Power supply disconnected or absent

Zero-Point Shut-Off Function

Type 3280 incorporates a tight zero-point shut-off. If the analog input signal falls below 1% of the configured range (< 4.16 mA), the motor drives the control cone firmly into the seat to achieve zero leakage. If the signal drops below 4.0 mA, the unit interprets this as a cable break and flashes the red LED.

Capacitive Buffer Module for Failsafe Positioning

In standard configuration, Type 3280 holds its current position upon power interruption. When automatic closure or opening on power loss is required, an optional external Type 1573 capacitive buffer module (Ident 773440) provides backup energy.

Upon utility power interruption, the buffer module delivers an 18 V DC auxiliary voltage for several seconds. The valve electronics detect the voltage step-down and drive the actuator to the predetermined safety position (factory default: Valve Closed; inverted direction on DIP 1 results in Valve Open). A single buffer module can power up to three Type 3280 valves.

Ordering Information and Accessories

Primary Product Identifier

Article / Ident	Valve Type	Body Material	Port Size	Orifice	Seal	Voltage	Control Mode
329197	3280	Brass	1/2" NPT female	DN10	EPDM	24 V DC	4–20 mA analog input, valve closed digital output

Compatible Electrical and System Accessories

Accessory Description	Specification	Order Number (Ident)
M12 Female Cable Connector	8-pole, unshielded, 2 m pre-wired cable	919061
M12 Female Cable Connector	8-pole, shielded, 2 m pre-wired cable	918991
Capacitive Buffer Module	Type 1573, DIN-rail mount, provides backup power for failsafe positioning	773440
Power Supply Phoenix Class 2	Type 1573, 85–240 V AC to 24 V DC, 1.25 A (UL 1310)	772438
DIN-Rail Power Supply	Type 1573, 100–240 V AC to 24 V DC, 1 A (UL 1310)	772361
DIN-Rail Power Supply	Type 1573, 100–240 V AC to 24 V DC, 2 A (UL 1310)	772362
DIN-Rail Power Supply	Type 1573, 100–240 V AC to 24 V DC, 3.8 A (UL 60950-1)	772898