The BURKERT 3361 electromotive 2-way globe control valve is the ideal solution for control tasks under demanding operating conditions. The electromotive actuator with a ball screw positions the control cone with the highest precision. A unique feature is its high positioning speed of up to 6 mm/s, which reacts almost delay-free to process signals and can be varied according to customer demands. Pressure variations or shocks in the medium are not transferred to the valve position.

Each flow-optimised valve body can be equipped with up to 5 different valve seats for precise adaptation to customer needs. If necessary, the safety position can be approached by an optional SAFEPOS energy-pack in case of a power failure. The actuator and valve are perfectly adapted to each other with a closed design and robust surface, ensuring the hygienic requirements of fast and residue-free cleaning. Harsh environmental conditions are no problem for the Type 3361 due to its IP65/IP67 degree of protection and high impact and vibration resistance.

Key Features

• Highly precise, dynamic closed-loop control
• Weather, impact, and vibration-resistant design
• Several Kvs values per port size due to removable valve seats
• Position controller and process controller available
• Hydrogen and Oxygen variants available

General Technical Data

Feature	Specification
Design	Globe control valve
Nominal diameter	DN 10 to 100, NPS 3/8 to 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)
Operating pressure	0 to 25 bar(g), 40 bar(g) on request (Vacuum variant down to -0.9 bar(g) optional)
Nominal pressure	PN 25 / PN 40 (DIN EN 1333), Class 150 (DIN EN 1759)
Travel speed	6 mm/s (AG2 1300 N), 4 mm/s (AG2 2500 N), 3 mm/s (AG3 7700 N / 10000 N)
Operating voltage	24 V DC ± 10 % (maximum residual ripple 10 %)
Fieldbus (digital)	Bürkert system bus (büS), CANopen, EtherNet/IP, PROFINET, Modbus TCP, EtherCAT
Medium temperature	-40 °C to +230 °C
Degree of protection	IP65/IP67 (DIN EN 60529), NEMA 4X

Approvals and Conformities

• Explosion Protection: ATEX (II 3G Ex ec IIC T4 Gc / II 3D Ex tc IIIC T135 °C Dc) and IECEx.
• North America: Actuators UL Listed for the USA and Canada (UL 61010-1).
• Drinking Water: Suitable for use in drinking water applications up to +85 °C.
• Foods and Beverages / Hygiene: FDA, USP, EC Regulation 1935/2004, and China food GB Standards compliant.

Materials

Component	Material
Actuator housing	Powder-coated aluminium
Display housing / blind cover	PPS (standard), stainless steel 1.4301 (for ATEX/IECEx)
Spindle	Stainless steel 1.4401 (316) / 1.4404 (316L)
Spindle seal	PTFE V-seals (filled) with spring compensation
Seat seal	Stainless steel 1.4571 (optionally hardened), PTFE, or PEEK seal washer
Valve body	Stainless steel CF3M

Dimensions

Actuator AG2

Actuator AG3

Note on Dimensions

Dimensions without sealing function: the actuator is raised by approx. 2 mm in the closed position.

Performance Specifications

Operating limits for medium temperature and operating pressure In addition to the maximum operating pressures, the application range of Bürkert process valves is limited by the nominal pressure in accordance with the relevant standard.

Operating Limits for Seat Seal

• Metal seals (Stainless steel): -40 °C to +230 °C. Impervious even under demanding process conditions.
• Soft seals (PTFE): -40 °C to +130 °C. Allows tight closing.
• Soft seals (PEEK): -10 °C to +230 °C. Not recommended in cases of increased erosion due to demanding process conditions.

Product Design and Assembly

The electromotive linear drive consists of a brushless DC motor, a gear, and a spindle system that transfers the force to the closing element. The integrated electronics are controlled either by standard signals or via a fieldbus (digital). A positioner and a process controller are available as controller variants.

Design of electromotive valve Type 3361 AG3

Integrated Position Controller The position of the actuator (stroke) is controlled according to the position set-point value. The displacement transducer records the actual position (POS) of the electric linear actuator. The positioner compares the actual position value with the position set-point value (CMD) specified as a standard signal.

Integrated Process Controller (Optional) The additionally implemented PID controller allows process control. The set-point position of the valve is calculated from the external signal (e.g., level, pressure, flow rate, temperature) for the process set-point and the actual process value via the control parameters.

Maintenance & Service

Unrivalled service life and tightness are guaranteed by the proven self-adjusting packing gland with exchangeable V-seals. The control cone, valve seat, and packing gland seal set can be replaced by trained technicians using appropriate tools. Always run the X.TUNE function after mounting the actuator or changing the valve body to adjust the position control to the physical stroke.