Burkert Type 3361 electromotive 2-way globe control valve is the solution for control tasks under 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, reacting almost delay-free to process signals. 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 SAFEPOS energy-pack in case of 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. The fieldbus-compatible Type 3361 provides helpful functions for process monitoring, valve diagnostics, and predictive maintenance.

General Technical Data

Feature	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)
Kvs 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)
Operating voltage	24 V DC ± 10 % (maximum residual ripple 10 %)
Fieldbus (digital)	Bürkert system bus (büS), CANopen, EtherNet/IP, PROFINET, Modbus TCP, EtherCAT
Medium temperature	-40 °C to +230 °C
Ambient temperature	-25 °C to +65 °C (without additional modules)

Approvals and Conformities

Conformity Notes

The approvals and conformities listed below must be stated when making enquiries. Not all available variants can be supplied with all approvals.

• Explosion Protection: Optional ATEX / IECEx (Zone 2/22, Category 3 device).
• North America: Optional UL Listed for USA and Canada (UL 61010-1).
• Drinking Water: Optional suitability for drinking water applications up to +85 °C (TrinkwasserV).
• Foods and Beverages / Hygiene: FDA compliance, USP biocompatibility, EC Regulation 1935/2004, China food GB Standards.
• Others: Optional suitability for Oxygen, Hydrogen, and TA Luft.

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 (optionally hardened), PTFE or PEEK seal washer
Control cone	Stainless steel 1.4571 (optionally hardened)
Valve body	Stainless steel CF3M

Dimensions

Actuator Dimensions

Body with Flange Connection

DN	NPS	∅ DF	LF	∅ BF	AF	∅ D	A x α	∅ MF
15	1/2	95	130	65	16	14	4 × 90°	18.1
20	3/4	105	150	75	18	14	4 × 90°	23.7
25	1	115	160	85	18	14	4 × 90°	29.7
32	1 1/4	140	180	100	18	18	4 × 90°	38.4
40	1 1/2	150	200	110	18	18	4 × 90°	44.3
50	2	165	230	125	20	18	4 × 90°	56.3

Body with Threaded Connection

DN	NPS	G	NPT	RC	LM	AF
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
32	1 1/4	20	17.3	19.1	110	50
40	1 1/2	22	17.3	19.1	120	55
50	2	24	17.6	23.4	150	70

Electrical Connections

• X1: Circular plug M12, 8-pin, A-coded (Input and output signals)
• X2: Circular socket M12, 5-pin, A-coded (Input signals process actual value)
• X3: Circular plug M12, 5-pin, A-coded (Operating voltage AG2 and büS/CANopen)
• X4: Circular plug M12, 5-pin, L-coded (Actuator supply AG3)
• X7: Circular socket M12, 4-pin, D-coded (Fieldbus connection)

Performance Specifications

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.

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 signals or via a fieldbus. The optional SAFEPOS energy-pack supplies the actuator with the energy required to move the valve into a desired safety position if the supply voltage fails.

Maintenance and Service

Risk of injury from high pressure

Before working on the system or device, switch off the pressure and vent or drain lines.

Risk of crushing

Perform installation and maintenance work only in the isolated state. For devices with SAFEPOS energy-pack: Completely drain the energy pack and wait until the LED illuminated ring goes out.

Replacing the Control Cone

1. Set operating state to MANUAL and move the valve into the open position.
2. Switch off the supply voltage.
3. Remove the actuator from the valve body.
4. Knock out the dowel pin using a suitable pin punch and remove the control cone.
5. Attach the new control cone to the spindle, align the bores, and carefully knock in the new dowel pin.
6. Mount the actuator on the valve body and run the X.TUNE function.

Replacing the SAFEPOS Energy-Pack

1. Switch off the supply voltage and wait until the LED goes out.
2. Open the actuator housing by removing the dummy cover/display module and actuator cover.
3. Loosen the locking screw (T10) and pull out the old SAFEPOS energy-pack.
4. Insert the new SAFEPOS energy-pack into the guiding grooves and push in all the way.
5. Tighten the locking screw (1.1 Nm) and close the actuator housing.