BURKERT 462569 (Type 0330) is a direct-acting 3/2-way pivoted armature solenoid valve configured in circuit function C (normally closed) with an integrated media-separating diaphragm. Designed for demanding gaseous and liquid media, article 462569 features a brass body, FKM seals, an orifice size of 4.0 mm (Kv 0.23 m³/h, QNn 255 l/min), and NPT 1/4 female threaded ports. The solenoid actuator is isolated from the fluid chamber by the diaphragm system, preventing media contact with the magnetic core assembly and eliminating corrosion risks. This unit operates across a pressure range of -1.00 bar to 3.00 bar, providing vacuum service, and is powered by a 120 V AC, 60 Hz epoxy coil rated for 100% ED continuous operation.

Technical Data and Operating Parameters

Article 462569 delivers fast cycle times and media isolation in neutral and aggressive fluids with a viscosity of up to 37 mm²/s.

Specification Parameter	Value
Article Number	462569
Valve Type	0330
Circuit Function	C (3/2-way, normally closed: P/NC closed, A/OUT to R/NO connected)
Orifice Size	DN 4.0 mm (5/32")
Flow Coefficients	Kv (water): 0.23 m³/h; QNn (gas): 255 l/min
Pressure Range	-1.00 bar to 3.00 bar (Vacuum variant NA02)
Port Connection	NPT 1/4 female thread
Valve Body Material	Brass (MS)
Valve Seat Material	Brass (MS)
Sealing Material	FKM (Fluor rubber, Shore hardness 70)
Operating Voltage	120 V AC (60 Hz), tolerance ±10%
Coil Power Consumption	Inrush: 30 VA, Hold: 15 VA / 8 W
Coil Insulation Class	Class H (Epoxy encapsulation)
Duty Cycle	100% continuous operation (100% ED)
Switching Times	Opening: 8 to 15 ms, Closing: 8 to 15 ms (at 20 °C, 6 bar)
Medium Temperature Range	0 °C to +90 °C
Permissible Ambient Temperature	Max. +55 °C (Storage: -40 °C to +80 °C)
Electrical Protection Degree	IP65 according to DIN EN 60529 / IEC 60529 (with cable plug)

Media Separation and Material Construction

Type 0330 isolates the coil mechanism from process media using a flexible separating diaphragm. The fluid chamber and body materials resist chemical breakdown when handling oxidizing acids, hot oils with additives, salt solutions, and waste gases compatible with brass and FKM.

Item Number	Component	Material
1	Solenoid Coil	Epoxy encapsulation
2	Diaphragm	FKM (Fluor rubber)
3	O-Ring	FKM (Fluor rubber)
4	Valve Seat	Brass
5	Valve Body	Brass

Media Compatibility Verification

Verify specific chemical combinations using the Bürkert resistApp tool prior to handling unlisted corrosive compounds. For media with particulates, install upstream filtration to protect the sealing surface.

Circuit Function and Fluidic Port Assignment

Circuit function C operates as a 3/2-way normally closed valve. In the de-energized rest state, pressure port 1 (P) is shut off, while working port 2 (A) vents to exhaust port 3 (R). When energized, the pivoted armature shifts, connecting port 1 (P) directly to port 2 (A), while shutting off exhaust port 3 (R).

Circuit Function	Connection Port 1	Connection Port 2	Connection Port 3
A (2/2-way NC)	P	A	—
B (2/2-way NO)	B	P	—
C (3/2-way NC, 462569 standard)	P	A	R
D (3/2-way NO)	R	B	P
E (3/2-way Mixing)	P1	A	P2
F (3/2-way Distribution)	A	P	B
T (3/2-way Universal)	NC	IN / OUT	NO

Operation in Alternative Circuit Functions

The internal compression springs in Type 0330 valves are factory-matched to the specified circuit function. If a function C valve is connected in alternative circuit arrangements, the permissible operating pressure changes according to the following ratings for a DN 4 metal body valve:

Original Valve Function	Target Circuit Function A	Target Circuit Function B	Target Circuit Function C	Target Circuit Function D	Target Circuit Function E	Target Circuit Function F
Function C (DN 4 Metal)	5.0 bar	0.8 bar	5.0 bar	0.8 bar	0.8 bar	5.0 bar

Dimensions and Mechanical Installation

Article 462569 features an overall installation body length of 46 mm and female NPT 1/4 threaded ports on a brass valve housing. Bottom mounting holes follow a standardized 38 mm x 24 mm pattern for secure mechanical support.

Thread Designation D1	Thread Length L1	Thread Designation D2	Thread Length L2
G 1/8	9.0 mm	—	—
G 1/4	9.0 mm	NPT 1/4	7.5 mm

Upstream Filtration Requirement

For safe operation of the solenoid valve, a dirt trap with mesh size ≤ 500 µm must be installed upstream of the valve inlet. Check pipelines for debris and flush before connecting.

• Installation Position: Flexible mounting orientation; actuator upright is preferred.
• Fastening: Secure the valve using M4 x 8 tapped holes located on the underside of the housing (38 mm x 24 mm hole pattern).
• Thread Engagement: For NPT 1/4 threads, ensure adequate engagement while respecting the 7.5 mm minimum thread depth on middle ports.
• Piping Tooling: Hold the valve by the brass body flats using an open-ended spanner. Do not use the solenoid coil as a lever arm.

Manual Override and Electrical Connection

Type 0330 incorporates a lockable manual override on the actuator housing to assist commissioning, testing, and manual override cycles.

Manual Override Interlock

When the manual override is rotated clockwise into the locked position, the valve cannot be electrically actuated. Always return the override to its neutral position before resuming electrical control.

Electrical Wiring

Electrical connection is established via plug contacts matching Form A according to DIN EN 175301-803 (DIN 43650 Design A), suitable for cable plug Type 2518 or Type 2509.

• Connect power leads to terminals 1 and 2 independently of polarity.
• Connect the protective ground conductor (PE) to the ground terminal and verify electrical continuity between coil housing and valve body.
• Tighten the cable plug central mounting screw with a maximum tightening torque of 1.0 Nm.

Position	Description	Position	Description
1	Valve Type (0330)	7	Nominal Pressure (PN)
2	Circuit Function (C)	8	Active Coil Power (8 W)
3	Orifice (4.0 mm)	9	Manufacturing Code
4	Sealing Material (FKM)	10	Article Number (462569)
5	Body Material (Brass MS)	11	Supply Voltage (120 V / 60 Hz)
6	Connection Type (NPT 1/4)

Maintenance and Troubleshooting

De-energize and Depressurize

Before performing maintenance or disassembling the valve from the piping system, turn off the line pressure, drain and deaerate all lines, and switch off electrical power to prevent accidental energization.

Fault Condition	Probable Cause	Corrective Action
Valve does not actuate	Solenoid coil interrupted or short circuit	Check electrical wiring, supply voltage, and coil resistance.
	Operating pressure out of specification	Verify supply pressure is within -1.0 to 3.0 bar range.
	Manual override locked in actuated position	Unlock manual override by turning counter-clockwise.
Valve does not close	Valve interior contaminated with particulates	Disassemble valve body and clean internal seats and diaphragm.
	Manual override locked	Return manual override to unlocked neutral position.
Media leakage at body joint	Fastening screws loose or seal deteriorated	Inspect FKM diaphragm and O-ring; retighten body screws evenly.