BURKERT 363215 (Type 3361) is an electromotive 2-way globe control valve engineered for precise dynamic regulation in demanding industrial continuous processes. The specific unit configuration combines a G 3/8" female threaded valve body in investment cast stainless steel CF3M with an AG2 electromotive linear actuator powered by 24 V DC. Actuator linear thrust is generated via an electric brushless DC motor and precision ball screw, delivering a constant travel speed of 6 mm/s under a nominal actuator force of 1,300 N. This mechanical coupling eliminates dead-band displacement caused by fluctuating media inlet pressures, holding valve positions rigidly with a control dead band within ±0.1%.

Flow passes through the valve body below the seat (direction 2 to 1), opposing the plug closure direction to prevent water hammer and pressure shocks. The Type 3361 modular platform permits interchangeable valve seats across five distinct seat diameters for each port connection. For the DN 10 (G 3/8") port connection, seat sizes ranging from 3 mm to 10 mm provide calibrated Kvs ratings from 0.1 m³/h to 2.7 m³/h with theoretical rangeabilities reaching up to 50:1. Operating pressures range from 0 to 25 bar(g), and the enclosure is sealed to IP65/IP67 and NEMA 4X standards.

Technical Specifications

Specification Parameter	Value / Technical Rating
Manufacturer Model Number	363215
Type Series	3361
Valve Construction	2-way globe control valve with linear electric actuator
Actuator Size	AG2 (Actuator size 2, nominal force 1,300 N)
Port Connection Size	DN 10 / NPS 3/8" (female thread G 3/8 DIN ISO 228-1)
Body Pressure Rating	PN 25 (DIN EN 1333) / Class 150 (DIN EN 1759)
Operating Pressure Range	0 to 25 bar(g) (vacuum version down to -0.9 bar(g) optional)
Fluid Temperature Range	-40 °C to +230 °C (depending on seat seal material)
Ambient Temperature Range	-25 °C to +65 °C (without expansion modules; subject to derating)
Maximum Media Viscosity	Up to 600 mm²/s
Control Characteristic	Equal-percentage (linear available on request)
Actuator Travel Speed	6 mm/s (for 1,300 N nominal force)
Closing Time	3.3 s to 6.6 s (depending on stroke travel and operating limits)
Position Control Dead Band	±0.1%
Operating Supply Voltage	24 V DC ± 10% (maximum permissible residual ripple 10%)
Maximum Current Consumption	3 A (full load including 1 A SAFEPOS charging current; +2 A at lowest temp)
Standby Power Draw	2 W to 5 W
Operating Duty Cycle	100% continuous duty
Protection Class (DIN EN 61140)	Class III
Enclosure Ingress Protection	IP65 / IP67 (DIN EN 60529), NEMA 4X
Actuator Weight	5.5 kg (AG2 actuator head alone, excluding body)
Approved Operating Media	Steam, neutral gases, water, alcohols, oils, fuels, hydraulic fluids, salt solutions, organic solvents

Materials of Construction

Type 3361 utilizes non-corrosive materials designed for hygiene, washdown resistance, and durability under mechanical vibration.

Actuator Enclosure Materials (AG2)

Item	Component Description	Material Specification
1	Display housing / Blind cover / Gateway cover	PPS (Standard); Stainless steel 1.4301 (ATEX/IECEx variants)
2	Actuator upper cover	PPS
3	Static housing seals	EPDM
4	Actuator main housing body	Powder-coated cast aluminium
6	Base sealing gaskets	EPDM
7	Actuator base flange	PPS

Valve Body and Wetted Components

Item	Component Description	Material Specification
1	Valve spindle (stem)	Stainless steel 1.4401 (316) / 1.4404 (316L)
2	Spindle gland packing	PTFE V-rings (filled) with stainless spring compensation
3	Spindle guide bush	Stainless steel 1.4404 (316L)
4	Packing gland tube	Stainless steel 1.4401 (316)
5	Body-to-bonnet gasket	Graphite or PTFE
6	Seat sealing insert	Stainless steel 1.4571, PTFE, or PEEK washer
7	Control cone (plug)	Stainless steel 1.4571 (optionally hardened)
8	Replaceable valve seat	Stainless steel 1.4571 (optionally hardened)
9	Seat O-ring (seat size ≥ 25)	EPDM or PTFE
10	Valve body	Stainless steel CF3M (cast 316L equivalent)

Dimensions and Mounting Geometry

Actuator heights are defined from the pipeline centerline to the top edge of the cover. In the closed seated position without tight shut-off preload, the actuator rises approximately 2 mm.

AG2 Actuator Height Across Port Sizes

Nominal Diameter DN	Nominal Pipe Size NPS	Height H1 (Standard Variant) [mm]	Height H2 (Fieldbus Variant) [mm]
10	3/8"	417	489
15	1/2"	417	489
20	3/4"	423	495
25	1"	446	518
32	1 1/4"	474	546
40	1 1/2"	479	551
50	2"	485	557

Threaded Valve Body Dimensions (DIN ISO 228-1)

DN	NPS	Thread D	Thread Depth E [mm]	Face-to-Face LM [mm]	Hexagon Wrench Flat AF [mm]
10	3/8"	G 3/8	12.0	65	27
15	1/2"	G 1/2	14.0	65	27
20	3/4"	G 3/4	16.0	75	34
25	1"	G 1	18.0	90	41
32	1 1/4"	G 1 1/4	20.0	110	50
40	1 1/2"	G 1 1/2	22.0	120	55
50	2"	G 2	24.0	150	70

Flow Characteristics and Pressure Ratings

The standard control trim produces an equal-percentage flow characteristic in compliance with DIN EN 60534-2-4. Water flow test measurements determine intermediate Kv figures as a function of percentage stroke travel.

Fluidic Data for DN 10 (NPS 3/8") Flow Below Seat

Seat Size [mm]	Actuator Force [N]	Max Operating Pressure Stainless [bar(g)]	Max Operating Pressure PTFE [bar(g)]	Max Operating Pressure PEEK [bar(g)]	Rangeability	Kv 10% [m³/h]	Kv 30% [m³/h]	Kv 50% [m³/h]	Kv 70% [m³/h]	Kv 90% [m³/h]	Kvs 100% [m³/h]
3	1,300	25 (Class IV)	—	—	20:1	0.005	0.013	0.026	0.044	0.077	0.10
3	1,300	25 (Class IV)	—	—	20:1	0.009	0.023	0.046	0.085	0.160	0.20
4	1,300	25 (Class IV)	—	—	30:1	0.023	0.049	0.097	0.180	0.350	0.50
6	1,300	25 (Class VI)	25 (Class VI)	—	50:1	0.007	0.045	0.160	0.410	1.100	1.25
8	1,300	25 (Class VI)	25 (Class VI)	—	50:1	0.070	0.120	0.260	0.610	1.500	2.00
10	1,300	25 (Class VI)	25 (Class VI)	—	50:1	0.110	0.190	0.480	1.000	2.300	2.70

Operating Limits and Temperature Derating

Fluid pressure retention and actuator electronics operating limits interact directly based on process media temperatures.

In the AG2 ambient temperature chart above, curve 1 applies to basic units without modules, curve 2 applies to units with an illuminated display module, and curve 3 applies to units equipped with the SAFEPOS energy-pack or integrated fieldbus gateway.

Seat Seal Selection Limits

Tight Shut-off	Leakage Class (DIN EN 60534-4)	Permissible Media Temperature	Seat Material Selection
Not required	Class III / IV (Metal-to-metal)	-40 °C to +230 °C	Stainless steel 1.4571 (Permissible leakage 0.1% or 0.01% of nominal flow)
Not required	Class III / IV (Hardened metal)	-40 °C to +230 °C	Hardened stainless steel (Recommended for wet steam, cavitation, or abrasive media)
Required	Class VI (Soft seal bubble-tight)	-40 °C to +130 °C	PTFE seal washer (Recommended for process temperatures ≤ +130 °C)
Required	Class VI (Soft seal bubble-tight)	-10 °C to +230 °C	PEEK seal washer (Recommended for process temperatures > +130 °C)

Special Application Variants

Special product executions supported by the Type 3361 platform include:

• High-temperature variant: Modified spindle packing rated up to +230 °C for steam and thermal transfer fluids.
• Vacuum variant: Configuration without relief bore, rated for negative pressure down to -0.9 bar(g).
• Low-temperature variant: Media exposure verified down to -40 °C.
• Oxygen variant (NL02): Non-metallic wetted components approved for gaseous oxygen up to 25 bar(g) and +60 °C.
• Hydrogen variant (NG18): External stem/body tightness tested to 10⁻⁴ mbar·l/s at 40 bar delivery condition.

Electrical Interfaces and Signal Wiring

The AG2 actuator is supplied with either an internal 3x M20 cable gland terminal strip or standard M12 circular industrial connectors.

Connector X1 — Input and Output Signals (M12 8-pin Male, A-coded)

Pin Number	Signal Assignment
1	Digital input +
2	GND for digital input and digital outputs
3	Digital output 2 + (PNP, max. 100 mA)
4	Digital output 1 + (PNP, max. 100 mA)
5	Analogue output -
6	Analogue output + (0/4–20 mA or 0–5/10 V)
7	Set-point value / Analogue input -
8	Set-point value / Analogue input + (0/4–20 mA or 0–5/10 V)

Connector X3 — AG2 Power Supply and büS/CANopen (M12 5-pin Male, A-coded)

Pin Number	Signal Assignment
1	CAN Shield / Cable shield
2	Operating voltage 24 V DC ± 10%
3	GND / CAN_GND
4	CAN_H
5	CAN_L

Connector X2 — External Process Actual Value Input (M12 5-pin Female, A-coded)

Pin Number	4–20 mA Sensor Input (Externally Supplied)
1	Do not connect
2	Do not connect
3	Do not connect
4	Process actual value 4–20 mA (input resistance 80 Ω, 12 bit)
5	Process actual value GND

Control Architecture and User Interface

The internal microprocessor compares the target set-point (CMD) with the real-time position sensor feedback (POS). If a control deviation (Xd1) occurs, the brushless DC motor repositions the valve cone via the actuating variable CTRL. An optical 360° LED ring indicates operating states, end-position limits, warnings, and device diagnostics through customizable colour and flash patterns.

Manual Override Operation

When electrical power is connected, the valve can be actuated electrically in MANUAL mode using the push buttons located beneath the blind cover or via display keys. When power is off, mechanical manual actuation is available:

1. Switch off power and ensure the LED illuminated ring is completely extinguished.
2. Rotate the bayonet dummy cover counter-clockwise to remove.
3. Insert a 3 mm Allen key into the mechanical override drive.
4. Apply gentle axial pressure and turn counter-clockwise to open, or clockwise to close.
5. Strictly adhere to the maximum permissible torque limit of 2 Nm to avoid stripping internal gears.

Installation, Maintenance, and Calibration

Maintenance and rebuild procedures require dedicated assembly torques and approved chemical lubricants.

Recommended Fastener and Assembly Tightening Torques

Joint / Threaded Component	Port Size DN	Tightening Torque [Nm]	Tightening Torque [lbf·ft]
Body Connection to Actuator Base	DN 10 / 15	45 ± 3	33 ± 2
Body Connection to Actuator Base	DN 20	50 ± 3	37 ± 2
Body Connection to Actuator Base	DN 25	60 ± 3	44 ± 2
Replaceable Valve Seat Thread	DN 10 / 15 (Seat sizes 3–15)	20 (+3 / -0)	15 (+2 / -0)
Packing Gland Spindle Guide Bush	DN 10 / 15 (Spindle ø 10 mm)	15	11
Actuator Base Housing Screws	AG2 (4x housing screws)	5.0	3.7
Gateway Fastening Screw	M12 Gateway / Bayonet	1.1	0.8
SAFEPOS Bracket Retaining Screw	T10 Torx locking screw	1.1	0.8

All body connection threads, spindle guide threads, and seat installation threads must be lubricated using food-grade lubricant Klüberpaste UH1 96-402 (or OKS 1110-3 silicone grease for static seals). For oxygen service, only BAM-approved oxygen lubricants may be applied.

Position Calibration via X.TUNE

After remounting the actuator, replacing the control cone, exchanging the valve seat, or renewing the packing gland, the position controller must be recalibrated by running the X.TUNE function:

• Never initiate X.TUNE while medium pressure is present in the pipeline. Line pressure falsifies seating force detection and causes control errors.
• On devices without a display, depress and hold both OPEN and CLOSE internal push buttons simultaneously for 5 seconds until the 360° LED ring lights up solid orange.
• On display devices or via the PC Bürkert Communicator software, navigate to Position Controller -> MAINTENANCE -> CALIBRATION -> X.TUNE, confirm the seat seal type, and execute the cycle.

Spare Parts and Ordering Information

Original replacement parts ensure process reliability, seat tightness, and extended valve operating lifecycles.

Type 3361 Spare Parts and Accessories for DN 10 / DN 15

Component Description	Port Size / Sub-assembly	Order Article Number
Control Cone Set (Steel/Steel)	DN 10/15, Seat Size 4	149 934
Control Cone Set (Steel/Steel)	DN 10/15, Seat Size 6	152 696
Control Cone Set (Steel/Steel)	DN 10/15, Seat Size 8	149 935
Control Cone Set (Steel/Steel)	DN 10/15, Seat Size 10	149 912
Replacement Valve Seat Set	DN 10/15, Seat Size 3	284 777
Replacement Valve Seat Set	DN 10/15, Seat Size 4	262 143
Replacement Valve Seat Set	DN 10/15, Seat Size 6	262 146
Replacement Valve Seat Set	DN 10/15, Seat Size 8	262 147
Replacement Valve Seat Set	DN 10/15, Seat Size 10	262 149
Packing Gland Seal Set	Spindle ø 10 mm, DN 10–20	285 685
Stainless Spindle Guide Bush	Body DN 10/15, Spindle ø 10 mm	246 577
Valve Seat Installation Tool	DN 15/10 Seat Replacement	652 604
Modified Socket Wrench SW19	Packing Gland Spindle ø 10 mm	683 220
SAFEPOS Energy-Pack Storage Unit	AG2 Actuator (Wear Part)	285 834
Plastic Dummy Cover	AG2 / AG3 Actuator Enclosure	277 881
M12 Power Cable 5 m (Socket, 4-pin)	AG2 Power X3 (Without Comm.)	918 038
M12 Signal Cable 2 m (Socket, 8-pin)	AG2 I/O Signals X1	919 061
USB büS Interface Set 1	PC Diagnostic Stick Set Type 8923	772 426