BURKERT 43084 is a complete Type 0256 direct-acting 2/2-way plunger solenoid valve engineered for shut-off, dosing, and control of neutral liquids and gases as well as technical vacuum. Featuring circuit function A (normally closed), the unit opens when energized and shuts tight when de-energized. The assembly is built with a forged brass body with G 1/4 internal thread ports, a 6.0 mm orifice, an epoxy-encapsulated class H coil rated for 24 V DC continuous duty (100% ED), and FKM seals designed for operating media temperatures from -10 °C to +130 °C at differential pressures from 0 to 2 bar.

Technical Specifications

BURKERT 43084 operates as a direct-acting plunger valve without requiring any minimum differential pressure for actuation. Flow is routed above the valve seat, providing zero-bar operating capability and stable sealing under vacuum conditions.

Parameter	Technical Value
Product Type	Type 0256 direct-acting plunger valve
Circuit Function	WW A (2/2-way, normally closed)
Article Number (MPN)	043084
Port Connection 1 & 2	G 1/4 internal thread
Orifice Size (DN)	6.0 mm (1/4")
Flow Capacity Kv (Water)	0.8 m³/h
Flow Capacity QNn (Gas)	860 l/min
Pressure Range (Liquids & Gases, DC)	0.00 bar to 2.00 bar (gauge pressure)
Vacuum Capability	Technical vacuum
Operating Voltage	24 V DC (voltage tolerance ±10%)
Duty Cycle	100% ED continuous rating
Thermal Insulation Class	Class H (epoxy coil)
Switching Time Opening (DC)	20 ms to 80 ms (measured at +20 °C, 6 bar inlet pressure)
Switching Time Closing (DC)	20 ms to 30 ms (measured at +20 °C, 6 bar inlet pressure)
Medium Temperature Range (FKM)	-10 °C to +130 °C
Maximum Ambient Temperature	+55 °C
Maximum Medium Viscosity	21 mm²/s (21 cSt)
Protection Class	IP65 (with cable plug attached)
Flow Direction	Directed above seat (indicated by arrow on body)

Circuit Function and Operation

In circuit function A, the 2/2-way valve remains closed when de-energized. The internal spring holds the plunger against the valve seat. Energizing the coil pulls the core upward, opening the orifice directly without hydraulic assistance.

INFO

Operating parameters are specified at an ambient temperature of up to +55 °C. For extended periods of downtime, actuating the valve 1 to 2 times per day maintains functional reliability.

Materials of Construction

Component materials are selected for chemical compatibility with oxygen, hot air, hot oils, and oils with additives.

Item No.	Component	Material
1	Coil	Epoxy
2	Spring	Stainless steel 1.4310
3	Core / Plunger	Stainless steel 1.4105
4	Seal	FKM (Fluor rubber)
5	Valve Body	Brass (Messing)

Dimensions and Mounting Data

BURKERT 43084 utilizes the 74.5 mm brass body execution with wrench flat width of 22 mm.

Body Material	Port Thread D	Thread Depth F [mm]	Total Height H [mm]	Body Length L [mm]	Wrench Flat SW [mm]
Brass	G 1/4	12	91	74.5	22
Brass	G 3/8	12	91	74.5	22
Brass	G 1/2	14	94	74.5	27

For mounting onto machine surfaces or manifold plates, a dedicated mounting kit (article no. 151287) is available separately. It includes a clamp bracket and two M5 × 35 cheese-head screws. The distance between the M5 threaded bores is 37 mm, and the distance between the Ø 7 mm mounting holes is 48 mm.

Ordering Reference: Brass Body 74 mm Family

The table below details the Burkert ordering chart for Type 0256 valves featuring the 74 mm brass housing, with article 043084 highlighted in its exact configuration.

Port	Orifice [mm]	Kv (Water) [m³/h]	Pressure DC [bar]	Pressure AC Liq. [bar]	Pressure AC Gas [bar]	Seal	24V DC	24V 50Hz	110V 50Hz	230V 50Hz
G 1/4	4	0.5	0–6	0–12	0–16	NBR	055418	145729	—	054569
G 1/4	6	0.8	0–2	0–4	0–8	NBR	145760	054924	054729	145763
G 1/4	4	0.5	0–6	0–12	0–16	FKM	056010	—	—	145738
G 1/4	6	0.8	0–2	0–4	0–8	FKM	043084	—	085459	054484
G 3/8	6	0.8	0–2	0–4	0–8	NBR	055963	053680	—	054360
G 3/8	10	1.5	0–0.4	0–1	0–1.5	NBR	145784	145805	040521	145786
G 3/8	6	0.8	0–2	0–4	0–8	FKM	—	—	—	145804
G 3/8	10	1.5	0–0.4	0–1	0–1.5	FKM	054672	058912	—	054673
G 1/2	6	0.8	0–2	0–4	0–8	NBR	145771	057212	065499	145772
G 1/2	8	0.9	0–0.5	0–1.5	0–2.5	NBR	040532	043220	065361	056421
G 1/2	10	1.5	0–0.4	0–1	0–1.5	NBR	145788	145789	145790	120133
G 1/2	12	1.8	0–0.1	0–0.5	0–1	NBR	145796	145797	—	145799
G 1/2	6	0.8	0–2	0–4	0–8	FKM	145776	051894	054696	055163
G 1/2	8	0.9	0–0.5	0–1.5	0–2.5	FKM	058779	064865	—	045502
G 1/2	10	1.5	0–0.4	0–1	0–1.5	FKM	145806	145792	—	054983
G 1/2	12	1.8	0–0.1	0–0.5	0–1	FKM	057676	241863	—	145801

Electrical Connection and Accessories

The device uses contact pins configured to Form A acc. to DIN EN 175301-803. A standard mating cable plug is included in the package.

• 1: Plug gasket seal
• 2: Cable connector (Type 2518 or compliant Form A plug)

Electrical Safety

Connect the protective grounding conductor before applying voltage. Check electrical continuity between the coil body and the valve housing. Tighten the central cable plug screw with a maximum torque of 1 Nm.

Compatible Accessories

• Type 2518 Cable Plug (Form A DIN EN 175301-803): Available with 12–24 V AC/DC LED indicator (article no. 314812), LED plus varistor (article no. 314820), or unshielded standard 0–250 V AC/DC (article no. 314802).
• Type 1087 Timer Module: Attachable cycling timer module operating directly on Form A plug pattern (e.g., analogue 10–30 V AC/DC article no. 348828).
• Mounting Kit (Brass Body): Article no. 151287, clamp bracket with 2x M5 × 35 screws.

Installation and Piping

Installation position is optional, but positioning the solenoid actuator upright is recommended to minimize particulate settling.

Piping Preparation

Clean and flush all pipelines thoroughly prior to valve installation. Install a pipeline strainer with mesh size ≤ 500 µm upstream of the valve inlet port.

• Observe the medium flow arrow marked on the brass valve housing.
• Do not use the solenoid coil as a lever arm when tightening threaded connections. Hold the valve body directly using an open-ended spanner (SW 22 mm).
• Verify that system pressure is fully released and isolated prior to line installation.

Maintenance and Troubleshooting

Under normal operating conditions, BURKERT 43084 operates maintenance-free. If internal contamination or seat wear occurs, original Bürkert replacement sets can be installed.

• Item 1: Replacement coil kit (state device article no. 043084).
• Item 2: Wearing parts kit comprising plunger core, spring, and seals.

Troubleshooting Guide

• Valve does not switch: Inspect power supply against the type label (24 V DC). Verify coil continuity; check for coil short circuit or burned winding. Clean the core and core tube if particulates are obstructing movement. Check that line pressure does not exceed 2.0 bar.
• Valve does not close: Check for debris or foreign particles deposited on the valve seat. Clean valve internal chamber and replace damaged FKM seat seals if scratched.