BURKERT Type 3361 electromotive 2-way globe control valve provides highly precise, dynamic closed-loop control for demanding operating conditions. The electromotive actuator with a ball screw positions 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. Each flow-optimized valve body can be equipped with up to 5 different valve seats for precise adaptation to specific flow requirements. The closed design features an IP65/IP67 degree of protection and high impact and vibration resistance.

General Technical Data

Product properties	Specification
Design	Globe control valve
Nominal diameter	DN 10 to DN 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)
Controller variant	Positioner or process controller (option)
Operating pressure	0 to 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 to 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 to 6.6 s; AG3: 8.7 to 12.0 s
Travel speed	6 mm/s (AG2 1300 N), 4 mm/s (AG2 2500 N), 3 mm/s (AG3 7700/10000 N)
Dead band	± 0.1 %
Operating voltage	24 V DC ± 10 % (maximum residual ripple 10 %)
Medium temperature	-40 °C to +230 °C
Ambient temperature	-25 °C to +65 °C (without additional modules)

Approvals and Conformities

The Type 3361 is available with optional approvals including ATEX/IECEx (Zone 2/22), UL Listing for USA/Canada, FDA and USP Class VI compliance for food and beverage applications, and suitability for oxygen or hydrogen media.

Materials

Component	Material (AG2 / AG3)
Display housing/blind cover	PPS (standard), stainless steel 1.4301 (for ATEX/IECEx)
Actuator cover	PPS (AG2) / PC (AG3)
Seal	EPDM
Actuator housing	Powder-coated aluminium
Actuator base	PPS (AG2) / Stainless steel 1.4308 (AG3)

Component	Material
Spindle	Stainless steel 1.4401 (316)/1.4404 (316L)
Spindle seal	PTFE V-seals (filled) with spring compensation
Valve body	Stainless steel CF3M
Seat seal	Stainless steel 1.4571 (optionally hardened), PTFE or PEEK seal washer
Control cone	Stainless steel 1.4571 (optionally hardened)

Performance Specifications

Flow Characteristics

The valve features an equal-percentage flow characteristic according to DIN EN 60534-2-4 (linear characteristic curve available on request). The theoretical rangeability reaches up to 50:1 depending on the seat size.

Operating Limits for Seat Seal

Tight sealing required	Leakage class	Medium temperature	Seat seal
No (Additional shut-off valve recommended)	III/IV (metal seals)	-40 °C to +230 °C	Stainless steel
Yes (Additional shut-off valve often unnecessary)	VI (soft seals)	-40 °C to +130 °C	PTFE
Yes	VI (soft seals)	-10 °C to +230 °C	PEEK

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 analogue signals or via a digital fieldbus (EtherNet/IP, PROFINET, Modbus TCP, EtherCAT).

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 of the electric linear actuator, and the positioner compares this with the set-point value to adjust the motor drive accordingly.

Safety Position via Energy Storage

The safety starting positions in case of power interruption are realized with the optional SAFEPOS energy-pack. The desired position (open, closed, or intermediate) is set via the menu. Without the energy storage, the valve remains in its last position upon power failure.