BURKERT Type 3361 (SKU 20093991) 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 according to customer needs. 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	Description
Design	Globe control valve
Nominal diameter	DN 10...DN 100, NPS 3/8...4 (SKU 20093991 is DN 20)
Safety setting	With energy storage SAFEPOS energy-pack: open, closed or freely programmable position. Without energy storage: blocked in last position
Flow direction	Against closing direction (below seat)
Controller variant	Positioner or process controller (option)

Performance Data	Description
Operating pressure	0...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)
Closing time	AG2: 3.3...6.6 s (Depending on travel speed, stroke and operating conditions)
Theoretical rangeability	Up to 50:1
Travel speed	6 mm/s (for AG2 actuator force 1300 N)

Electrical Data	Description
Operating voltage	24 V DC ± 10 % (maximum residual ripple 10 %)
Operating current	AG2: maximum 3 A (at maximum load and including 1 A charging current of the optional energy storage SAFEPOS energy-pack).
Protection class	III (DIN EN 61140)
Duty cycle	100 %

Actuator Sizes

• AG2: Actuator size 2 with a nominal force of 1300 or 2500 N for seat size 3…50.
• AG3: Actuator size 3 with a nominal force of 7700 or 10000 N for seat size 40…100.

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

Operating Limits

Operating Limits for Seat Seal

Tight sealing required	Leakage class (DIN EN 60534-4)	Medium temperature	Seat seal
No (An additional shut-off valve is recommended)	III/IV (metal seals)	-40 °C...+230 °C	Stainless steel
Yes (An additional shut-off valve is often unnecessary)	VI (soft seals)	-40 °C...+130 °C (recommended for ≤ +130 °C)	PTFE
Yes	VI (soft seals)	-10 °C...+230 °C (recommended for > +130 °C)	PEEK

Demanding Process Conditions

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.

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.

The intelligent process valve Type 3361 offers the operator options for process monitoring, valve diagnosis and preventive maintenance. Internal measurements of the operating state are evaluated and, if necessary, issued as a warning or error message. They signal, for example, impermissible ambient and process conditions, functional deviations of components or the status of the energy storage device.