Burkert Type 3361 electromotive 2-way globe control valve is the solution for control tasks under demanding operating conditions. The 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. Each flow-optimised valve body can be equipped with up to 5 different valve seats for precise adaptation. The fieldbus-compatible Type 3361 provides helpful functions for process monitoring, valve diagnostics, and predictive maintenance.

General Technical Data

Product properties	Details
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. 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)
Kvs value	0.1...140 m³/h
Flow characteristic	Equal percentage, linear (on request)
Seat leakage	Class III, IV and VI (DIN EN 60534-4)
Travel speed	6 mm/s (AG2 1300 N), 4 mm/s (AG2 2500 N), 3 mm/s (AG3 7700 N / 10000 N)
Operating voltage	24 V DC ± 10 % (maximum residual ripple 10 %)
Protection class	IP65/IP67 (DIN EN 60529), NEMA 4X
Medium temperature	-40 °C...+230 °C

Note on 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

Approvals and Conformities

• Explosion protection (Optional): ATEX / IECEx (II 3G Ex ec IIC T4 Gc / II 3D 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 (TrinkwasserV)
• Foods and beverages/Hygiene: FDA, USP, EC Regulation 1935/2004, China food GB Standards
• Others: Suitability for oxygen and hydrogen (optional)

Materials

Actuator (AG2 / AG3):

• Display housing/blind cover: PPS (standard), stainless steel 1.4301 (for ATEX/IECEx)
• Actuator cover: PPS (AG2) / PC (AG3)
• Actuator housing: Powder-coated aluminium
• Actuator base: PPS (AG2) / Stainless steel 1.4308 (AG3)

Valve Body:

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

Dimensions

Body with flange connection (DIN EN 1092 PN 25 / ANSI B 16.5 Class 150)

DN	NPS	Ø DF (DIN)	LF (DIN)	Ø DF (ANSI)	LF (ANSI)
15	1/2	95	130	89	184
20	3/4	105	150	99	184
25	1	115	160	108	184
32	1 1/4	140	180	-	-
40	1 1/2	150	200	127	222
50	2	165	230	152	254
65	2 1/2	185	290	178	276
80	3	200	310	190	298
100	4	235	350	229	352

Body with threaded connection (G / NPT / RC)

DN	NPS	LM	AF
15	1/2	65	27
20	3/4	75	34
25	1	90	41
32	1 1/4	110	50
40	1 1/2	120	55
50	2	150	70

Electrical Connection

AG2 variant circular plug-in connectors:

• 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)

Performance Specifications

Flow Characteristics

Equal-percentage flow characteristic according to DIN EN 60534-2-4 (linear characteristic curve on request). The globe control valve has different theoretical rangeabilities depending on the seat size (up to 50:1).

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:

• Stainless steel (Class III/IV): -40 °C to +230 °C. Metallic seals are impervious even under demanding process conditions.
• PTFE (Class VI): -40 °C to +130 °C.
• PEEK (Class VI): -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 or via a fieldbus (digital). A positioner and a process controller are available as controller variants.

Safety Position via Energy Storage

The safety starting positions in case of power interruption is realised with the optional energy storage SAFEPOS energy-pack. The desired position is set via the menu. In addition to the end positions (open/closed), any desired intermediate position can be defined here.

Spare Parts Overview

Replacement part sets available for Type 3361:

• Control cone set: Control cone, dowel pin, graphite seal and lubricant
• Valve seat set: Valve seat and graphite seal
• Seal set for the packing gland: Individual parts of the packing gland, graphite seal and lubricant
• Spindle guide for the packing gland: Spindle guide, graphite seal and lubricant

Maintenance Safety

Risk of injury from high pressure. Before working on the system or device, switch off the pressure and vent or drain lines. Spare parts may be replaced only by trained technicians and with the appropriate tools.