Bürkert Type 3361 (SKU 20052904) electromotive 2-way globe control valve is the solution when it comes to control tasks under demanding operating conditions. The electromotive actuator with ball screw positions the control cone with highest precision. A unique feature is its high positioning speed up to 6 mm/s that reacts almost delay-free to process signals and that 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 a precise adaptation according to customer needs. Actuator and valve are adapted perfectly to each other with a closed design and robust surface. This ensures the hygienic requirements of fast and residue-free cleaning. Harsh environmental conditions are no problem for the Type 3361 because of the degree of protection IP65/IP67 and its 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 20052904 is 3")
Safety setting	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 (SKU 20052904 max 17 bar)
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)
Operating voltage	24 V DC ± 10 % (maximum residual ripple 10 %)
Protection class	III (DIN EN 61140)
Degree of protection	IP65/IP67 (DIN EN 60529), NEMA 4X

INFO

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 (SKU 20052904 uses AG3 10000 N).

Approvals and Conformities

• Explosion Protection (Optional): ATEX (II 3G Ex ec IIC T4 Gc, II 3D Ex tc IIIC T135 °C Dc) and IECEx.
• North America: Actuators UL Listed for the USA and Canada (UL 61010-1).
• Drinking Water: Suitable for use in drinking water applications (TrinkwasserV), max +85 °C.
• Foods and Beverages: FDA Code of Federal Regulations compliant, USP biocompatible, and EC Regulation 1935/2004 compliant.
• Oxygen & Hydrogen: Optional suitability for gaseous oxygen and hydrogen applications.

Materials

Actuator (AG2 / AG3)

No.	Component	Material
1	Display housing/blind cover	PPS (standard), stainless steel 1.4301 (for ATEX/IECEx)
2	Actuator cover	PPS (AG2) / PC (AG3)
3	Seal	EPDM
4	Actuator housing	Powder-coated aluminium
7	Actuator base	PPS (AG2) / Stainless steel 1.4308 (AG3)

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
5	Seal valve body	Graphite or PTFE
6	Seat seal	Stainless steel 1.4571, PTFE or PEEK (SKU 20052904 uses PEEK)
7	Control cone	Stainless steel 1.4571 (optionally hardened)
10	Valve body	Stainless steel CF3M

Dimensions

Actuator AG3

DN	NPS	H1 (Standard variant)	H2 (Fieldbus variant)
40	1 1/2	560 mm	632 mm
50	2	566 mm	638 mm
65	2 1/2	620 mm	692 mm
80	3	628 mm	700 mm
100	4	638 mm	710 mm

Body with Flange Connection

ANSI B 16.5 Class 150 (FTF 37 according to DIN EN 558-2)

NPS	∅ DF	LF	∅ BF	AF	∅ D	A x α	∅ MF
1/2	89	184	60.5	11.2	15.7	4 × 90°	15.7
3/4	99	184	69.9	12.7	15.7	4 × 90°	20.8
1	108	184	79.2	14.2	15.7	4 × 90°	26.7
1 1/2	127	222	98.6	17.5	15.7	4 × 90°	40.9
2	152	254	120.7	19.1	19.1	4 × 90°	52.6
2 1/2	178	276	139.7	22.3	19.1	4 × 90°	62.7
3	190	298	152.5	23.9	19.1	4 × 90°	78.0
4	229	352	190.5	23.9	19.1	8 × 45°	102.4

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 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. 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.

TIP

The valve position can be changed manually in 2 ways: either via the electrical manual control or via a mechanical manual override if no supply voltage is available.