The Bürkert Type 3361 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. If necessary, the safety position can be approached by an optional energy storage in case of power failure. Actuator and valve are adapted perfectly to each other with closed design and robust surface.

General Technical Data

Product properties
Design	Globe control valve
Nominal diameter	DN 10...DN 100, NPS 3/8...4
Safety setting in case of power failure	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)
Weight	Depending on actuator variant up to: AG2: 5.5 kg, AG3: 16 kg

Performance data
Operating pressure	0...25 bar(g), 40 bar(g) on request. Vacuum variant...- 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)
Closing time	AG2: 3.3...6.6 s, AG3: 8.7...12.0 s
Theoretical rangeability	Up to 50:1
Travel speed	6 mm/s (for AG2 1300 N), 4 mm/s (for AG2 2500 N), 3 mm/s (for AG3 7700 N and 10000 N)
Dead band of the position control	± 0.1 %

Electrical data
Operating voltage	24 V DC ± 10 % (maximum residual ripple 10 %)
Protection class	III (DIN EN 61140)
Duty cycle	100 %
Standby consumption	2...5 W

Communication and control
Standard signal (analogue)	Set-point value: 0/4...20 mA, 0...5/10 V and binary input
Fieldbus (digital)	Bürkert system bus (büS), CANopen (optional), EtherNet/IP, PROFINET, Modbus TCP, EtherCAT (optional via integrated gateway)

Medium data
Operating medium	Steam, neutral gases, water, alcohols, oils, fuels, hydraulic fluids, salt solutions, organic solvents, oxygen (optional), hydrogen (optional), Iyes (optional)
Medium temperature	- 40 °C...+ 230 °C
Viscosity	Up to 600 mm²/s

Approvals and Conformities

• Explosion protection: Optional (valid for the variable code PX48). As a category 3 device suitable for zone 2/22. ATEX/IECEx approvals available.
• North America (USA/Canada): Optional Actuators UL Listed for the USA and Canada (valid for the variable code PU11).
• Drinking water: Optional suitable for use in drinking water applications (valid for the variable code PF39). Suitable for products with a maximum temperature of +85 °C.
• Foods and beverages/Hygiene: FDA, USP, EC Regulation 1935/2004, and China food GB Standards compliant variants available.
• Oxygen: Optional suitability for gaseous oxygen (valid for the variable code NL02).
• Hydrogen: Optional suitability for gaseous hydrogen (valid for the variable code NG18).
• TA Luft: Technical instruction on air quality control (valid for the variable code PM01).

Materials

AG2 Actuator Materials:

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

Valve Body 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

Dimensions

Actuator (AG2)

Nominal diameter (port connection)		Height
DN	NPS	H1 Standard variant
10	3/8	417 mm
15	1/2	417 mm
20	3/4	423 mm
25	1	446 mm
32	1 1/4	474 mm
40	1 1/2	479 mm
50	2	485 mm

Performance Specifications

Operating Limits for Medium Temperature and Operating Pressure

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 Optional Variants

• High-temperature variant: Suitable for applications with steam, neutral gases and other heat transfer mediums up to +230 °C.
• Drinking water variant: Wetted materials are tested for suitability with drinking water up to +85 °C.
• Vacuum variant: Without leakage bore, this design is suitable for pressures down to -0.9 bar(g).
• Low-temperature variant: Suitable for minimum medium temperatures down to -40 °C.
• Oxygen variant: Non-metallic wetted materials are tested for suitability with oxygen and are suitable for operating pressures up to 25 bar(g) and medium temperatures up to +60 °C.
• Hydrogen variant: Wetted materials are tested for suitability with hydrogen and are suitable for operating pressures up to 40 bar(g) and medium temperatures up to +100 °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. 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.

Maintenance: Replacing the Control Cone

Required work steps:

1. Set operating state MANUAL.
2. Move valve into open position.
3. Switch off the supply voltage. Wait until LED illuminated ring goes out.
4. Remove actuator from valve body.
5. Knock out dowel pin using a suitable pin punch.
6. Remove control cone.
7. Attach new control cone to the spindle. Align bores of the control cone and spindle.
8. Support control cone on the cylindrical part with the help of a prism.
9. Put on dowel pin and carefully knock in with a hammer.
10. Mount actuator on valve body.
11. Apply supply voltage.
12. Adjusting the position control – running X.TUNE.
13. Set operating state AUTOMATIC.

Maintenance: Replacing the Valve Seat

Required work steps:

1. Set operating state MANUAL.
2. Move valve into open position.
3. Switch off the supply voltage. Wait until LED illuminated ring goes out.
4. Remove actuator from valve body.
5. Select a suitable tool insert and screw it into the installation tool.
6. Unscrew the valve seat using the installation tool and a wrench.
7. Clean the thread and sealing surface in the valve body using compressed air.
8. Grease the valve seat thread with a lubricant (e.g. with Klüberpaste UH1 96-402).
9. Manually screw the fitted valve seat into the valve body thread.
10. Screw in valve seat tight using torque wrench.
11. Mount actuator on valve body.
12. Apply supply voltage.
13. Adjusting the position control – running X.TUNE.
14. Set operating state AUTOMATIC.