BURKERT Type 3361 is an innovative electromotive 2-way globe control valve designed for demanding operating conditions. The electromotive actuator with a ball screw positions the control cone with the highest precision. It features a high positioning speed of up to 6 mm/s, reacting almost delay-free to process signals. The flow-optimized valve body can be equipped with up to 5 different valve seats for precise adaptation to customer needs. It offers a closed design with a robust surface, ensuring hygienic requirements for fast and residue-free cleaning. The device is highly resistant to harsh environmental conditions, impacts, and vibrations, featuring an IP65/IP67 degree of protection.

General Technical Data

Feature	Specification
Design	Globe control valve
Nominal diameter	DN 10 to DN 100, NPS 3/8 to 4
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
Nominal pressure	PN 25/PN 40 (DIN EN 1333), Class 150 (DIN EN 1759)
Flow characteristic	Equal percentage, linear (on request)
Seat leakage	Class III, IV and VI (DIN EN 60534-4)
Operating voltage	24 V DC ± 10 % (maximum residual ripple 10 %)
Medium temperature	-40 °C to +230 °C
Degree of protection	IP65/IP67 (DIN EN 60529), NEMA 4X

Safety Setting

In case of a power failure, devices equipped with the optional SAFEPOS energy-pack can move to an open, closed, or freely programmable position. Without the energy storage, the valve remains blocked in its last position.

Approvals and Conformities

The Type 3361 valve is available with various approvals and conformities depending on the selected variant:

• Explosion Protection: ATEX / IECEx (Zone 2/22, Ex ec IIC T4 Gc / Ex tc IIIC T135 °C Dc).
• North America: UL Listed for USA and Canada (UL 61010-1).
• Drinking Water: Suitable for drinking water applications up to +85 °C.
• Foods and Beverages: FDA compliant, USP Class VI biocompatible, EC Regulation 1935/2004, and China food GB Standards.
• Special Media: Variants available for Oxygen and Hydrogen applications.

Materials

Actuator Materials (AG2)

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

Valve Body Materials

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

Dimensions

Body with Threaded Connection

DN	NPS	G	NPT	RC	LM	AF
10	3/8	12	10.3	10.1	65	27
15	1/2	14	13.7	13.2	65	27
20	3/4	16	14	14.5	75	34
25	1	18	16.8	16.8	90	41

(Dimensions in mm. Refer to the full datasheet for sizes up to DN 100).

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 is up to 50:1 depending on the seat size.

Operating Limits

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.

Seat Seal Temperature Limits

• Stainless Steel (Metal seal): -40 °C to +230 °C
• PTFE (Soft seal): -40 °C to +130 °C
• PEEK (Soft seal): -10 °C to +230 °C

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 (analogue) or via a fieldbus (digital).

The intelligent process valve Type 3361 offers options for process monitoring, valve diagnosis, and preventive maintenance. Internal measurements of the operating state are evaluated and issued as a warning or error message if necessary. A special feature of the globe control valve is the screwed-in valve seat which can be replaced to reduce the seat size.