BURKERT 462468 (Type 0131) is a direct-acting, media-separated 2/2-way toggle solenoid valve configured with circuit function A (normally closed). Built with a rigid polyvinyl chloride (PVC) valve body, ethylene-propylene-diene rubber (EPDM) seals, and female NPT 1/2 process connections, the valve is engineered for controlling and shutting off aggressive or non-aggressive media without metallic fluid contact. The 15 mm nominal orifice provides a water flow rate (Kv) of 4.5 m³/h and an air flow rate (QNn) of 4,800 l/min across an operating pressure range from 0 bar up to 1 bar, with full technical vacuum capability.

The electromagnetic actuator features an epoxy-encapsulated Class H coil system with integrated "Kick and Drop" electronics operating on 24 V AC/DC. The internal circuit delivers a 100 W high-power inrush pulse to actuate the stainless steel plunger, dropping holding power to 9 W after pull-in to minimize electrical power consumption and internal coil heating. Media separation is achieved via an internal diaphragm barrier that isolates the actuator assembly from corrosive line chemicals. The assembly includes an integrated manual override with a 90° turn-lock mechanism for manual operation during commissioning and servicing.

Technical Specifications

Parameter	Specification
Type	0131
Article Number	462468
Circuit Function	CF A (2/2-way valve, normally closed)
Valve Construction	Complete direct-acting toggle valve
Media Separation	Yes (diaphragm isolation)
Nominal Diameter (DN)	15 mm (9/16")
Port Connection	Female thread NPT 1/2
Operating Pressure Range	0.00 bar - 1.00 bar (vacuum capable)
Flow Factor Kv (Water)	4.5 m³/h
Flow Rate QNn (Gas)	4,800 l/min
Operating Voltage	24 V AC/DC (50/60 Hz, tolerance ±10%)
Inrush Power Consumption	100 W (UC)
Holding Power Consumption	9 W (UC)
Duty Cycle	100% continuous operation
Switching Frequency	Max. 6/min (with UC electronics)
Opening Time	10 - 20 ms
Closing Time	40 - 60 ms
Medium Temperature Range	-10 °C to +50 °C
Ambient Temperature Range	-10 °C to +50 °C
Maximum Fluid Viscosity	37 mm²/s
Permissible Flow Velocity	2.5 m/s (DN 15)
Degree of Protection	IP65 (with DIN EN 175301-803 Form A cable plug)
Manual Override	Mechanical lever with 90° twist lock

Circuit Function and Media Separation

BURKERT 462468 operates in Circuit Function A (CF A). When unpowered, the internal valve seat remains closed by spring and toggle force. Energizing the 24 V solenoid lifts the plunger, moving the toggle mechanism and opening the direct fluid path from inlet port 1 (P/NC) to the outlet port.

The toggle pin transmits mechanical force from the dry core tube to the closing body across a flexible seal diaphragm. Because no process fluid enters the magnetic core chamber, aggressive process chemicals cannot corrode the metallic plunger or guide tube. With PVC body construction and EPDM elastomers, the valve handles alkalis, alkaline washing and bleaching solutions, water, and non-aggressive technical vacuum circuits up to 50 °C.

Component Materials

Item	Component	Material
1	Coil	Epoxy (insulation class H)
2	Plunger	Stainless steel 1.4105
3	Toggle pin	PTFE
4	True union nut	Polyvinyl chloride (PVC)
5	O-ring	Ethylene-propylene-diene rubber (EPDM)
6	Connection fitting	PVC (threaded NPT 1/2)
7	Body	Polyvinyl chloride (PVC)
8	Closing body	Ethylene-propylene-diene rubber (EPDM)
9	O-ring	Ethylene-propylene-diene rubber (EPDM)
10	Lateral flange	Polycarbonate (PC)
11	Manual override	Mechanical assembly with locking tab

Dimensions and Process Connection

BURKERT 462468 features internal NPT 1/2 pipe connections integrated into a true union plastic body. Dimensions conform to the 2/2-way plastic valve table with true union nut and connection fitting:

Material	DN	Connection	Dimension B (mm)	Dimension C (mm)	Thread D	Overall Length L1 (mm)	Center Height L2 (mm)
PVC	15	Threaded	19	14	NPT 1/2	136	103.0

Electrical Connection and Electronics

Electrical interconnection is established through male plug contacts according to DIN EN 175301-803 Form A, designed to mate with cable plugs such as BURKERT Type 2518. When properly mated and fastened with the central retaining screw (maximum torque 1 Nm), the assembly provides IP65 environmental ingress protection.

Energy-Saving Kick and Drop Technology

The integrated UC electronics deliver full inrush power (100 W) for fast, positive armature attraction during the first switching phase. Power then drops automatically to 9 W hold mode. The circuit includes a resettable internal temperature protection switch that safely shuts down the coil if impermissible heating occurs during excessive switching frequency.

Continuous Operation Recommendation

During prolonged continuous operation or long periods of inactivity, operate the valve at least 1 to 2 times per day to ensure functional safety and prevent seal adhesion.

Installation and Manual Override

Prior to piping installation, flush lines thoroughly to remove foreign debris. Always mount an upstream particulate strainer (filter rating ≤ 500 µm) ahead of the valve inlet.

Installation Guidelines

• Do not use the solenoid coil as a lever arm when tightening process connections.
• Ensure the PVC valve body is mounted free of mechanical bending or tensile stress from adjacent pipework.
• Verify process flow direction matches the flow markings on the valve body (P to A for NC).

BURKERT 462468 includes a manual override mechanism on the valve body. To actuate manually, depress the override pin and rotate it 90° clockwise until it hits the mechanical stop.

Manual Override Interlock

When the manual override is locked in the operated position, the valve cannot be closed or actuated electrically. Return the override to its neutral position before resuming electrical system control.

Maintenance, Troubleshooting, and Spare Parts

Periodic maintenance involves verifying seal integrity, confirming tight mechanical connections, and verifying that the maximum fluid flow velocity of 2.5 m/s is not exceeded.

Fault Observed	Possible Cause	Corrective Action
Valve does not actuate	Short circuit or interrupted coil	Check electrical supply and coil resistance
Valve does not actuate	Operating pressure exceeds 1 bar	Verify line pressure is within 0 to 1 bar limit
Valve does not actuate	Manual override locked	Disengage manual override mechanism
Valve does not close	Foreign particulate inside valve seat	Disassemble and clean valve interior
Valve does not close	Manual override locked in open position	Rotate manual override counter-clockwise to unlock

Original replacement parts are grouped into structured factory kits:

• Item 1: Coil set
• Item 2: Actuator set
• Item 3: Wearing part set (diaphragm and O-rings)

When ordering replacement kits, specify the target kit item along with the device article number 462468.