BURKERT Type 3361 (SKU 20138290) 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. 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 energy storage (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.

General Technical Data

Product Properties	Specification
Design	Globe control valve
Nominal diameter	DN 10...DN 100, NPS 3/8...4
Safety setting (power failure)	With SAFEPOS energy-pack: open, closed or freely programmable position. Without: blocked in last position
Flow direction	Against closing direction (below seat)
Controller variant	Positioner or process controller (option)
Operating pressure	0...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)
Flow characteristic	Equal percentage, linear (on request)
Seat leakage	Class III, IV and VI (DIN EN 60534-4)
Theoretical rangeability	Up to 50:1
Operating voltage	24 V DC ± 10 % (maximum residual ripple 10 %)
Protection class	III (DIN EN 61140)
Duty cycle	100 %
Operating medium	Steam, neutral gases, water, alcohols, oils, fuels, hydraulic fluids, salt solutions, organic solvents, oxygen (optional), hydrogen (optional), lyes (optional)
Medium temperature	-40 °C...+230 °C
Degree of protection	IP65/IP67 (DIN EN 60529), NEMA 4X

Approvals and Conformities

• Explosion Protection: Optional ATEX / IECEx (Category 3 device suitable for zone 2/22).
• North America: Optional Actuators UL Listed for the USA and Canada (UL 61010-1).
• Drinking Water: Optional suitability for use in drinking water applications (UBA, max +85 °C).
• Foods and Beverages / Hygiene: FDA (Code of Federal Regulations), USP (United States Pharmacopeial Convention), EC Regulation 1935/2004, China food GB Standards.
• Others: Suitability for oxygen, hydrogen, and TA Luft.

Materials

Actuator Materials (AG2 / AG3)

Component	Material
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)

Valve Body Materials

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

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.

SAFEPOS energy-pack

The optional energy storage device SAFEPOS energy-pack is available for the device. If the supply voltage fails, it supplies the actuator with the energy required to move the valve into the desired position, which can be set in the menu.

Integrated Position Controller

The position of the actuator (stroke) is controlled according to the position set-point value. The position set-point value is specified either 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). If there is a system deviation, the electric motor drive is controlled via the actuating variable CTRL and the actual position value is changed accordingly.

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 (PID controller).

Operating Limits

The maximum permissible temperature for the environment and the medium are dependent on each other. For particularly demanding process conditions such as cavitation, erosion by wet steam, or abrasive media, hardened cones and seats can be used to significantly increase the service life.