BURKERT 358992 (Type 3361) is an innovative electromotive 2-way globe control valve designed for demanding operating conditions. This specific configuration features a 2" ANSI B16.5 flange connection, a PTFE seat seal, and operates on 24V DC supply voltage. It is equipped with an AG2 actuator delivering 1300 N of driving force and is specifically rated as an oxygen version, supporting medium temperatures from -10 °C to 60 °C and operating pressures from 0 to 6 bar. The valve provides an equal percentage 50:1 control cone variant with a Kv value of 37 m³/h (Cv 42.8 gal/min).

The Type 3361 electromotive actuator with ball screw positions the control cone with the highest precision. A unique feature is its high positioning speed up to 6 mm/s that reacts almost delay-free to process signals. Pressure variations or shocks in the medium are not transferred to the valve position. The closed design and robust surface ensure hygienic requirements for fast and residue-free cleaning, while the IP65/IP67 protection class and high impact and vibration resistance make it suitable for harsh environmental conditions.

General Technical Data

Product Properties	Specification
Design	Globe control valve
Nominal diameter	2" (DN 50)
Port connection	Flange ANSI B16.5
Flow direction	Against closing direction (below seat)
Controller variant	Positioner
Operating pressure	0...6 bar (for SKU 358992)
Nominal pressure	PN 25 (DIN EN 1333), Class 150 (DIN EN 1759)
Kv value (water)	37 m³/h
Flow characteristic	Equal percentage 50:1
Travel speed	6 mm/s (for AG2 actuator force 1300 N)
Operating voltage	24 V DC ± 10 % (maximum residual ripple 10 %)
Operating current	AG2: maximum 3 A (at maximum load)
Medium temperature	-10 °C...+60 °C (for SKU 358992)
Ambient temperature	-25 °C...+60 °C
Degree of protection	IP65/IP67 (DIN EN 60529), NEMA 4X

Approvals and Conformities

Depending on the specific configuration, the Type 3361 series supports various approvals and conformities:

• Explosion protection: ATEX / IECEx (Zone 2/22)
• North America: UL Listed for USA and Canada
• Drinking water: Suitable for use in drinking water applications (UBA)
• Foods and beverages/Hygiene: FDA, USP, EC Regulation 1935/2004, China food GB Standards
• Oxygen: Suitability for gaseous oxygen (included in SKU 358992)
• Hydrogen: Suitability for gaseous hydrogen
• TA Luft: Technical instruction on air quality control

Materials

Actuator AG2

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

Valve Body

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	PTFE (for SKU 358992)
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

Performance Specifications

Flow Characteristics

• Equal-percentage flow characteristic according to DIN EN 60534-2-4.
• Theoretical rangeability: Kvs / Kv0 up to 50:1.

Operating Limits

WARNING

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.

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 chart.

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). The electromotive linear actuator is designed to provide optimum efficiency. At the same time, it keeps the valve tight and in position even at the maximum specified medium pressure in a powerless standstill.

Integrated Position Controller

The position of the actuator (stroke) is controlled according to the position set-point value. The position set-point value is either given by an external standard signal (analogue) or via a fieldbus (digital). 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 standard signal. If there is a system deviation, the electric motor drive is controlled via the actuating variable and the actual position value is changed accordingly.