Burkert Type 5404 is a servo-assisted piston valve available in NC (normally closed) and NO (normally open) variants. A minimum differential pressure is required for the valve switching function. The solenoid coils are moulded with high-quality epoxy resin. To reduce power consumption in operation, coils with "Kick and Drop" (KD) electronics assembly (double coil technology) are available. In combination with a plug to DIN EN 175301-803 Form A, the valves satisfy degree of protection IP65.

• Servo-assisted piston valve with an orifice up to DN 50
• Explosion proof variant for Cat. 2
• Suitable for gas and steam applications up to +180 °C
• Relief valves for compressors
• Energy-saving double coil technology with kick and drop variant

Circuit Functions

Symbol	Description
	Circuit function A (CF A) 2/2-way solenoid valve Servo-controlled Normally closed
	Circuit function B (CF B) 2/2-way solenoid valve Servo-controlled Normally open

General Technical Data

Product properties
Seal	PTFE seat seal and FKM PTFE seat seal and Graphite (steam variant) PTFE seat seal and EPDM (on request)
Body	Brass
Coil	Epoxy resin (polyamide on request)
Valve inner parts	Stainless steel, brass
Orifice	DN 12...DN 50
Thermal insulation class	Epoxy resin coil class H (class B on request)
Duty cycle	100% continuous operation
Operating medium	Neutral gases and liquids (e.g. compressed air, water, hydraulic oil and steam)
Medium temperature	Standard variant: -10 °C...+ 120 °C Steam variant: Up to + 160 °C (from - 40 °C on request), Up to + 180 °C for AC 6 Watt
Viscosity	Max. 21 mm²/s (21 cSt)
Degree of protection	IP65 with cable plug Type 2518 (IP67 on request) NEMA 4X with cable plug Type 2509 with stainless steel screws and epoxy coil

Approvals and Conformities

Explosion Protection

Optional: Explosion protection according to category 2 (zone 1/21) or category 3 (zone 2/22).

North America (USA/Canada)

Optional: UL Listed, UL Recognized, CSA, and FM (Factory Mutual) approvals available.

Oxygen

Optional: Suitability for oxygen (valid for the variable code NL02). The products are suitable for use with gaseous oxygen, according to the manufacturer's declaration.

Materials

Standard Variant (DN 12, Circuit Function A)

No.	Element	Material
1	Nut	Steel (thick-film passivated according to RoHS)
2	Coil	Epoxy (polyamide optional)
3	Stopper	Stainless steel 1.4105/303
4	Armature guide tube	Stainless steel 1.4303/305/308
5	Plunger	Stainless steel 1.4105/430F
6	Spring	Stainless steel 1.4310/301
7	Plunger seal	FKM (EPDM optional)
8	Flange	Steel (thick-film passivated according to RoHS)
9	Cover	Brass
10	O-ring	FKM (EPDM optional)
11	Spring	Stainless steel 1.4310/301
12	Piston ring	PTFE
13	Piston	Brass
14	Valve body	Brass
15	Piston seal	PTFE

Safety Instructions

Risk of injury due to high pressure and escaping medium

Switch off the pressure before working on the device or system. Vent or drain the lines.

Risk of injury from electric shock

Switch off the power supply before working on the device or system. Secure against reactivation. Observe the applicable accident prevention and safety regulations for electrical devices.

Risk of burns/fire due to hot device surface

Keep the device away from highly flammable substances and media and do not touch with bare hands if operated continuously.

Overheating, risk of fire

Connecting the solenoid without first installing the valve will lead to overheating and will destroy the solenoid. Only connect the solenoid after the valve has been installed.