BURKERT 20117424 (Type 3361) is an electrically driven 2-way globe control valve engineered for precise continuous fluid control in demanding industrial and hydrogen applications up to 40 bar(g). The valve is actuated by an electromotive AG2 linear drive equipped with a brushless DC motor and precision ball screw, delivering a nominal driving thrust of 1300 N at an actuator travel speed of 6 mm/s. Flow regulation occurs against the closing direction (flow below seat, 2 -> 1) through a 3 mm orifice seat with an equal-percentage 20:1 trim, providing a calibrated water flow coefficient Kvs of 0.1 m³/h (Cv 0.11 gpm).

Configured under article 20117424, the unit features a G 1/2 internal threaded body machined from investment cast CF3M stainless steel, rated for PN 40 and ASME Class 150 pressure containment. The control cone and valve seat are made of stainless steel 1.4571, forming a metallic seat seal that complies with DIN EN 60534-4 Leakage Class IV. For process safety during power loss, the valve incorporates an internal SAFEPOS energy-pack electrical storage module set to drive the valve into the normally open position within a typical closing time of 3.4 s. The device holds ATEX and IECEx explosion-proof certifications for Zone 2 and Zone 22 (Category 3 GD), satisfies an ingress protection rating of IP65/IP67 and NEMA 4X, and is verified for gaseous hydrogen service with a helium leak tightness guarantee of 10^-4 mbar*l/s.

Technical Data Summary (Article 20117424)

Parameter	Specification
Article Number (MPN)	20117424
Type Family	Type 3361
Valve Design	Electromotive 2-way globe control valve
Nominal Port Connection	G 1/2 internal thread (DIN ISO 228-1), DN 15 (NPS 1/2)
Body Material	Stainless steel CF3M
Actuator Size	AG2 (actuator size 2)
Motor Driving Thrust	1300 N
Positioning Speed	6 mm/s
Typical Closing Time	3.4 s (3400 ms)
Orifice Diameter (Seat Size)	3 mm (1/8")
Flow Coefficient Kvs (Water)	0.1 m³/h (Cv 0.11 gpm)
Flow Characteristic	Equal percentage, theoretical rangeability 20:1
Seat Seal Material	Stainless steel 1.4571 (metallic seat)
Seat Leakage Class	Class IV according to DIN EN 60534-4
Nominal Pressure Rating	PN 40 (DIN EN 1333) / Class 150 (DIN EN 1759)
Operating Pressure Range	0 to 40 bar(g)
Medium Temperature Limits	-10 °C to +100 °C (hydrogen variant)
Ambient Temperature Limits	-25 °C to +55 °C
Operating Supply Voltage	24 V DC ±10% (max. residual ripple 10%)
Maximum Operating Current	3 A (including 1 A SAFEPOS charging; +2 A at min. temp.)
Standby Power Draw	2 to 5 W
Duty Cycle	100% continuous
Position Control Dead Band	±0.1%
Control Function	Normally opened (NO in delivery status via SAFEPOS)
Electrical Interface	M12 circular multipole connectors (X1 8-pin, X3 5-pin)
Explosion Protection	ATEX: II 3G Ex ec IIC T4 Gc / II 3D Ex tc IIIC T135°C Dc; IECEx: Ex ec IIC T4 Gc / Ex tc IIIC T135°C Dc
Enclosure Rating	IP65 / IP67 (DIN EN 60529), NEMA 4X

AG2 Actuator Construction and Materials

The electromotive linear actuator AG2 combines a brushless direct-current electric motor, an internal gear train, and a low-friction ball screw mechanism. The drive holds its position without slip and maintains seat tightness against full differential line pressure up to 40 bar(g) in a de-energized standstill state.

Item No.	Component Part	Standard Material	ATEX / IECEx Execution
1	Display housing / blind cover	Polyphenylene sulphide (PPS)	Stainless steel 1.4301 (304)
2	Actuator cover	Polyphenylene sulphide (PPS)	Polyphenylene sulphide (PPS)
3	Static enclosure seal	EPDM	EPDM
4	Actuator housing body	Die-cast aluminium, powder-coated	Die-cast aluminium, powder-coated
6	Housing interface seal	EPDM	EPDM
7	Actuator base	Polyphenylene sulphide (PPS)	Polyphenylene sulphide (PPS)

Valve Body and Trim Specifications

The valve body has an optimized straight-seat globe geometry cast in stainless steel CF3M. Fluid isolation from the drive system is maintained by a self-adjusting spindle gland packing consisting of spring-compensated PTFE chevron V-rings. A dedicated relief bore in the bonnet neck provides diagnostic monitoring for spindle seal integrity.

Item No.	Wetted Component	Material Specification
1	Valve spindle (stem)	Stainless steel 1.4401 (316) / 1.4404 (316L)
2	Spindle gland packing seal	Spring-compensated filled PTFE V-seals
3	Spindle guide bush	Stainless steel 1.4404 (316L)
4	Packing gland tube	Stainless steel 1.4401 (316)
5	Valve body bonnet seal	Graphite or PTFE
6	Valve seat seal	Stainless steel 1.4571 (316Ti)
7	Control cone	Stainless steel 1.4571 (316Ti)
8	Screwed-in valve seat	Stainless steel 1.4571 (316Ti)
9	Valve seat O-ring	EPDM or PTFE
10	Valve body casting	Stainless steel CF3M

Seat Seal Operating Limits

Seat Seal Variant	Leakage Class (DIN EN 60534-4)	Medium Temperature Range	Application Scope
Stainless steel (article 20117424)	Class IV (metal-to-metal)	-40 °C to +230 °C (-10 °C to +100 °C for H2)	Impervious to erosive or abrasive process media. Permissible leakage rate up to 0.01% of nominal capacity.
PTFE soft seal	Class VI (tight shut-off)	-40 °C to +130 °C	Bubble-tight closing for clean liquids and gases below +130 °C.
PEEK soft seal	Class VI (tight shut-off)	-10 °C to +230 °C	Bubble-tight closing for higher temperatures above +130 °C.

Dimensional Specifications

Article 20117424 is configured with G 1/2 internal threads according to DIN ISO 228-1 and the AG2 actuator footprint without an external gateway.

Dimension Parameter	Value (DN 15 / NPS 1/2)
Port Connection Size D	G 1/2 (DIN ISO 228-1)
Thread Depth E	14.0 mm
Face-to-Face Body Length LM	65.0 mm
Hexagon Wrench Flat AF	27.0 mm
Total Height H1 (Standard AG2 Actuator)	417.0 mm
Additional Height Clearance in Closed Position	Approx. 2.0 mm (unseated clearance)
Actuator Net Weight	Up to 5.5 kg (excluding valve body)

Fluidic Performance and Flow Characteristics

Type 3361 delivers an equal-percentage flow characteristic curve conforming to DIN EN 60534-2-4. For the 3 mm seat diameter installed in article 20117424, the theoretical rangeability is 20:1.

Stroke (%)	Kv Value (m³/h)	Cv Value (gpm)
5%	-	-
10%	0.005	0.006
20%	0.009	0.010
30%	0.013	0.015
40%	0.019	0.022
50%	0.026	0.030
60%	0.034	0.039
70%	0.044	0.051
80%	0.060	0.070
90%	0.077	0.089
100%	0.100	0.116

Electrical Connections and Control Interfaces

Electrical connection is established through M12 circular multipole connectors located on the AG2 actuator base.

Circular Connector Pin Assignments

Connector Identifier	Pin No.	Assigned Signal Function
X1 (M12 plug, 8-pin, A-coded: Inputs/Outputs)	1	Digital input +
	2	GND for digital input and digital outputs
	3	Digital output 2 +
	4	Digital output 1 +
	5	Analogue output -
	6	Analogue output +
	7	Setpoint value / Analogue input -
	8	Setpoint value / Analogue input +
X3 (M12 plug, 5-pin, A-coded: Power & büS)	1	CAN Shield / functional shielding
	2	Operating voltage 24 V DC ±10%
	3	Power GND / CAN_GND
	4	CAN_H (büS communication)
	5	CAN_L (büS communication)

Analogue Control Specifications

Circuit Parameter	Technical Data Value
Analogue Setpoint Input	0/4 to 20 mA (input resistance 70 Ω) or 0 to 5/10 V (input resistance 22 kΩ), galvanically isolated
Analogue Position Feedback Output	0/4 to 20 mA (load 0 to 800 Ω) or 0 to 5/10 V (max. output current 10 mA)
Digital Input	0 to 5 V = logic 0; 10 to 30 V = logic 1
Digital Outputs	2x PNP outputs, short-circuit proof, current limited to 100 mA
Communication Interface	Service-büS interface via USB-büS set to Bürkert Communicator software Type 8920

Integrated Position Controller and Operation

The internal microprocessor compares the external setpoint CMD against the stem displacement signal POS recorded by an internal displacement sensor. Any control deviation Xd1 immediately drives the motor via manipulated variable CTRL within an adjustable dead band of ±0.1%.

Visual Indication and Manual Overrides

1. 360° LED Light Ring: Mounted on the blind cover/display module, showing operating state, warnings, and valve travel limits using user-selectable color modes.
2. Mechanical Position Indicator: A yellow mechanical indicator pin visible through the transparent bonnet neck window provides direct valve position verification even when powered down.
3. Electrical Manual Override: Available via tactile push buttons under the blind cover or display navigation keys in MANUAL mode.
4. Mechanical Manual Override: An Allen key socket (3 mm across flats) located below the blind cover allows manual stem positioning when completely de-energized.

Maximum Torque Limit for Mechanical Manual Override

When using the 3 mm Allen key on the mechanical manual override, apply a gentle downward pressure to couple the mechanism and do not exceed 2 Nm torque at the mechanical stroke limits to prevent gear train damage.

Automatic Valve Adaptation (X.TUNE)

After replacing a valve seat, control cone, or packing gland, execute the X.TUNE function to adapt the position controller to the exact mechanical stop positions. Never run X.TUNE under medium pressure, as process pressure will distort calibration.

SAFEPOS Energy-Pack Emergency Safety Function

Article 20117424 is factory-equipped with the SAFEPOS energy-pack capacitive energy storage unit. In the event of an external 24 V DC power interruption, the module supplies stored energy to reposition the valve into a pre-programmed safety position. For article 20117424, the delivery status is configured to drive the valve into the normally opened (NO) position.

• Full Charge Time: Ready for fail-safe duty within 120 seconds after power-up.
• Storage Life Expectancy: Up to 10 years depending on ambient temperature; self-monitoring logic flags end-of-life warnings.
• Service Replacement: Modular plug-in design (wearing spare part order number: 285834 for AG2).

Hydrogen Suitability and Hazardous Area Certifications

Article 20117424 is certified for gaseous hydrogen handling under variable code NG18. Non-metallic and metallic wetted components are tested for hydrogen compatibility up to 40 bar(g) and fluid temperatures up to +100 °C.

Hydrogen Helium Leak Tightness Testing

• External leak tightness (stem packing and body joint) tested with helium at 40 bar, +20 °C: 10^-6 mbar*l/s.
• External leak tightness tested with hydrogen at 40 bar, -10 °C to +100 °C: 2.78 x 10^-3 mbar*l/s.
• Series production delivery guarantee: External tightness verified to 10^-4 mbar*l/s.

Explosion-Proof Approvals

• ATEX Certificate: BVS 17 ATEX E 117 X
  • II 3G Ex ec IIC T4 Gc (Zone 2)
  • II 3D Ex tc IIIC T135°C Dc (Zone 22)
• IECEx Certificate: IECEx BVS 17.0100X
  • Ex ec IIC T4 Gc
  • Ex tc IIIC T135°C Dc

Maintenance, Installation, and Accessories

The valve may be installed in any mounting attitude, though positioning the actuator vertically upright is recommended to minimize particulate settling in the packing gland. During assembly and maintenance, observe the following tightening torques:

Joint Connection	Tool Size	Tightening Torque
Valve body to body connection (DN 15)	Open-end wrench	45 ±3 Nm (33 ±2 lbf ft)
Screwed-in valve seat (seat size 3 mm)	Installation tool 652604	20 Nm (+3 Nm tolerance)
Spindle guide bush (ø10 mm spindle)	Modified socket SW19 (683 220)	15 Nm
Actuator base to housing screws (4x)	Torx / hex	5 Nm (crosswise pattern)
Mechanical manual override	Allen key 3 mm	Max. 2 Nm

Dedicated Spare Parts and Accessories

Accessory Description	Order Number
Valve seat replacement tool for DN 15	652604
Modified socket wrench SW19 for packing gland (DN 15)	683 220
Control cone replacement set (seat 3 mm, stainless steel)	On request (pin punch 4 mm)
Valve seat replacement set (seat 3 mm, stainless steel)	284777
Packing gland seal set (spindle ø10 mm, DN 15/20)	285685
SAFEPOS energy-pack spare module for AG2	285834
USB-büS interface set 1 (Type 8923 with power supply)	772426
USB-büS interface set 2 (Type 8923 basic)	772551
Connecting cable M12 socket 8-pin A-coded (2 m, signals)	919061
Connecting cable M12 socket 4-pin A-coded (5 m, power)	918038
Klüberpaste UH1 96-402 assembly lubricant	Klüber Lubrication