Burkert 20120550 Type 3361 electromotive 2-way globe control valve is an innovative solution for demanding control tasks under rigorous operating conditions. This specific model features a DN 50 flange connection (DIN EN 1092-1), operates on a 24V DC supply, and utilizes the büS + PROFINET communication protocol. It is designed to handle operating pressures up to 25 bar (PN 25 / Class 150) and medium temperatures ranging from -10 °C to 230 °C. The electromotive actuator with a ball screw positions the control cone with exceptional precision, achieving a high positioning speed of up to 6 mm/s that reacts almost delay-free to process signals.

Pressure variations or shocks in the medium do not affect the valve position. The flow-optimized stainless steel valve body ensures precise adaptation to customer needs, offering a Kv value of 37 m³/h for this DN 50 variant. The closed design with a robust surface ensures hygienic requirements for fast and residue-free cleaning are met. With an IP65/IP67 and NEMA 4X protection rating, along with high impact and vibration resistance, the Type 3361 is highly reliable in harsh environmental conditions. The fieldbus-compatible design provides advanced functions for process monitoring, valve diagnostics, and predictive maintenance.

General Technical Data

Product properties
Design	Globe control valve
Nominal diameter	DN 50 (NPS 2)
Safety setting in case of power failure	Normally closed (delivery status), with electrical energy storage (SAFEPOS energy-pack)
Flow direction	Against closing direction (below seat)
Controller variant	Positioner

Performance data
Operating pressure	0...25 bar(g)
Nominal pressure	PN 25 (DIN EN 1333), Class 150 (DIN EN 1759)
Kv value (water)	37 m³/h
Flow characteristic	Equal percentage 50 : 1
Closing time typical	8.700 ms

Electrical data
Operating voltage	24 V DC ± 10 % (maximum residual ripple 10 %)
Protection class	III (DIN EN 61140)
Duty cycle	100 %

Communication and control
Control unit	Serial via bus
Protocol	büS + PROFINET
Control interface	Rugged display with operation keys

Medium data
Operating medium	Steam, neutral gases, water, alcohols, oils, fuels, hydraulic fluids, salt solutions, organic solvents
Medium temperature	-10 °C...+230 °C

Environment and installation
Ambient temperature	-25 °C...+65 °C
Degree of protection	IP65/IP67 (DIN EN 60529), NEMA 4X

Approvals and Conformities

• Explosion protection (Optional): As a category 3 device suitable for zone 2/22 (ATEX / IECEx).
• North America (USA/Canada): Actuators UL Listed according to UL 61010-1 and CAN/CSA-C22.2 No. 61010-1.
• Drinking water (Optional): Suitable for use in drinking water applications (TrinkwasserV) up to +85 °C.
• Foods and beverages/Hygiene: FDA compliant, USP biocompatible, EC Regulation 1935/2004 compliant, and China food GB Standards compliant.
• Oxygen / Hydrogen (Optional): Suitable for use with gaseous oxygen or hydrogen according to the manufacturer's declaration.

Materials

Actuator Materials

No.	Component	Material
1	Display housing/blind cover/gateway housing	PPS (standard), stainless steel 1.4301 (for ATEX/IECEx)
2	Actuator cover	PPS (AG2) / PC (AG3)
3	Seal	EPDM
4	Actuator housing	Powder-coated aluminium
6	Seal	EPDM
7	Actuator base	PPS (AG2) / Stainless steel 1.4308 (AG3)

Valve Body Materials

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 Dimensions

AG2 Actuator:

AG3 Actuator:

INFO

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

Performance Specifications

Flow Characteristics

• Equal-percentage flow characteristic according to DIN EN 60534-2-4.
• Theoretical rangeability: Up to 50:1 depending on seat size.

Operating Limits

Operating limits for medium temperature and operating pressure:

Operating limits for ambient and medium temperature:

The maximum permissible temperature for the environment and the medium are dependent on each other. The maximum allowable temperature curves of different device variants are shown in the temperature charts.

AG2:

AG3:

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 via the PROFINET fieldbus. The electromotive linear actuator is designed to provide optimum efficiency, keeping the valve tight and in position even at the maximum specified medium pressure in a powerless standstill.

This model includes the SAFEPOS energy-pack. If the supply voltage fails, it supplies the actuator with the energy required to move the valve into the desired safety position (normally closed for this SKU).

Integrated Position Controller

The position of the actuator (stroke) is controlled according to the position set-point value specified via the fieldbus. The displacement transducer records the actual position of the electric linear actuator. The positioner compares the actual position value with the position set-point value. If there is a system deviation, the electric motor drive is controlled via the actuating variable, and the actual position value is changed accordingly.