Burkert Type 3361 (SKU 351123) electromotive 2-way globe control valve provides highly precise, dynamic closed-loop control for demanding operating conditions. The electromotive actuator utilizes a ball screw to position the control cone with a positioning speed of up to 6 mm/s, reacting almost delay-free to process signals. Pressure variations or shocks in the medium are not transferred to the valve position. The flow-optimized stainless steel valve body accommodates up to 5 different exchangeable valve seats for precise adaptation to specific flow requirements. Operating on a 24 V DC supply voltage, the valve handles nominal pressures up to 25 bar (PN 25) and medium temperatures ranging from -40 °C to +230 °C.

The closed design features a robust powder-coated aluminum actuator housing and PPS or PC covers, ensuring IP65/IP67 and NEMA 4X protection against harsh environmental conditions, impacts, and vibrations. A self-adjusting packing gland with exchangeable PTFE V-seals maintains long-term tightness. The fieldbus-compatible Type 3361 supports EtherNet/IP, PROFINET, Modbus TCP, and EtherCAT via an integrated gateway, offering advanced functions for process monitoring, valve diagnostics, and predictive maintenance. An optional SAFEPOS energy-pack provides a programmable safety position in the event of a power failure.

General Technical Data

Product Properties	Specification
Design	Globe control valve
Nominal diameter	DN 10...DN 100, NPS 3/8...4
Safety setting (power failure)	With SAFEPOS energy-pack: open, closed or freely programmable. Without: blocked in last position
Flow direction	Against closing direction (below seat)
Controller variant	Positioner or process controller (option)
Weight	AG2: up to 5.5 kg, AG3: up to 16 kg (depending on port connection)

Performance Data	Specification
Operating pressure	0...25 bar(g), 40 bar(g) on request. Vacuum variant down to -0.9 bar(g)
Nominal pressure	PN 25/PN 40 (DIN EN 1333), Class 150 (DIN EN 1759)
Kv value	0.1...140 m³/h
Flow characteristic	Equal percentage, linear (on request)
Seat leakage	Class III, IV and VI (DIN EN 60534-4)
Closing time	AG2: 3.3...6.6 s, AG3: 8.7...12.0 s
Theoretical rangeability	Up to 50:1
Travel speed	6 mm/s (AG2 1300 N), 4 mm/s (AG2 2500 N), 3 mm/s (AG3 7700 N / 10000 N)
Dead band	± 0.1 %

Electrical Data	Specification
Operating voltage	24 V DC ± 10 % (maximum residual ripple 10 %)
Operating current	AG2: max 3 A, AG3: max 5 A (at maximum load including SAFEPOS charging current)
Protection class	III (DIN EN 61140)
Duty cycle	100 %
Standby consumption	2...5 W

Approvals and Conformities

• Explosion Protection: Optional ATEX/IECEx Category 3 device suitable for zone 2/22 (Ex ec IIC T4 Gc / Ex tc IIIC T135 °C Dc).
• Drinking Water: Optional suitability for drinking water applications up to +85 °C (TrinkwasserV).
• Foods and Beverages/Hygiene: FDA Code of Federal Regulations compliant, USP biocompatible, EC Regulation 1935/2004 compliant, China food GB Standards compliant.
• Others: Optional suitability for gaseous oxygen and gaseous hydrogen.

Materials and Components

No.	Component	Material
1	Spindle	Stainless steel 1.4401 (316)/1.4404 (316L)
2	Spindle seal	PTFE V-seals (filled) with spring compensation
3	Spindle guide	Stainless steel 1.4404 (316L)
4	Packing gland tube	Stainless steel 1.4401 (316)
5	Seal valve body	Graphite or PTFE
6	Seat seal	Stainless steel 1.4571 (optionally hardened), PTFE or PEEK seal washer
7	Control cone	Stainless steel 1.4571 (optionally hardened)
8	Valve seat	Stainless steel 1.4571 (optionally hardened)
9	O-ring valve seat	EPDM or PTFE
10	Valve body	Stainless steel CF3M

Dimensions

Actuator AG2

Actuator AG3

Performance Specifications

Flow Characteristics

The valve features an equal-percentage flow characteristic according to DIN EN 60534-2-4 (linear characteristic curve on request). The theoretical rangeability varies depending on the seat size.

Operating Limits

In addition to the maximum operating pressures, the application range is limited by the nominal pressure in accordance with the relevant standard.

Operating Limits for Seat Seal

• Stainless Steel (Metal Seals): Leakage class III/IV, -40 °C to +230 °C. Recommended for demanding process conditions (cavitation, erosion).
• PTFE (Soft Seals): Leakage class VI, -40 °C to +130 °C. Tight sealing.
• PEEK (Soft Seals): Leakage class VI, -10 °C to +230 °C. Tight sealing, recommended for > +130 °C.

Product Design and Assembly

The electromotive linear drive consists of a brushless DC motor, a gear, and a spindle system that transfers force to the closing element. The integrated electronics are controlled either by standard analogue signals or via a digital fieldbus. A positioner and a process controller are available as controller variants. The valve position can be changed manually via electrical manual control or a mechanical manual override if no supply voltage is available.

Maintenance and Service

Risk of injury from high pressure

Before working on the system or device, switch off the pressure and vent or drain lines. Failure to observe this warning will result in fatal or serious injuries.

Replacing the Control Cone

1. Set operating state to MANUAL and move the valve into the open position (at least 1/3 open).
2. Switch off the supply voltage and wait until the LED illuminated ring goes out.
3. Remove the actuator from the valve body.
4. Knock out the dowel pin using a suitable pin punch (4 mm for spindle diameter 10 mm; 5 mm for spindle diameter 14 mm).
5. Remove the old control cone.
6. Attach the new control cone to the spindle, aligning the bores.
7. Support the control cone on the cylindrical part with a prism.
8. Insert the dowel pin and carefully knock it in with a hammer, positioning it in the center of the spindle axis.

X.TUNE Calibration

After mounting the actuator back onto the valve body and applying supply voltage, run the X.TUNE function to adjust the position control to the physical stroke of the actuating element. Never run the X.TUNE under medium pressure.