BURKERT 20294 (Type 0330) is a direct-acting, media-separated pivoted armature solenoid valve. This specific model is a 2/2-way normally closed variant (Circuit Function A) equipped with a brass body, NBR seal, and G 1/4 internal thread connections. It operates at a nominal pressure range of 0 to 10 bar and is powered by 24 V DC. The solenoid coil is moulded with a chemically resistant epoxy, and the coil system is separated from the medium by a diaphragm system.

• Direct-acting, media-separated valve up to nominal diameter DN 5
• Maintenance-free pivoted armature technology
• Vibration-proof, block screwed coil system
• Service-friendly, robust manual override

Technical Data

Property	Value
Orifice	DN 3.0 mm
Circuit function	A (2/2-way solenoid valve, direct-acting, normally closed)
Thermal insulation class	Epoxy coil class H
Duty cycle	100% continuous operation
Switching time (DC)	Opening: 10...20 ms / Closing: 10...20 ms
Power consumption (DC)	Cold: 11 W / Warm: 8 W
Voltage tolerance	±10%
Operating medium (NBR)	Neutral mediums such as compressed air, town gas, water, hydraulic oil, oils and greases without additives, oxygen
Viscosity	Max. 37 mm²/s
Electrical connection	Plug contacts according to DIN EN 175 301-803 form A for cable plug Type 2518
Degree of protection	IP65 with cable plug
Installation position	As required, preferably with actuator upright
Ambient temperature	Max. +55 °C

Materials

No.	Element	Material
1	Coil	Epoxy
2	Diaphragm	NBR
3	O-ring	NBR
4	Seat	Brass
5	Valve body	Brass

Dimensions

The device can be attached via the existing holes on the bottom side. The hole pattern is 38x24. For metal bodies, use M4 screws. The minimum thread length at the middle connection is 7.5 mm.

D1	L1	D2	L2
G 1/8	9	-	-
G 1/4	9	NPT 1/4	7.5

Installation & Electrical Connection

DANGER!

Risk of injury from high pressure in the system/device ▶ Before working on equipment or device, switch off the pressure and deaerate/drain lines.

Risk of injury from electric shock ▶ Before working on the system or device, switch off the power supply and secure against reactivation. ▶ Observe the applicable accident prevention and safety regulations for electrical devices.

For safe operation of the solenoid valve, a dirt trap (≤ 500 µm) must be installed before the valve inlet.

Pin assignment standard variant (Circuit function A):

• Connection 1: P
• Connection 2: A
• Connection 3: -

Connect L1/+ and N/– to terminals 1 and 2 independently of the polarity. Connect the protective conductor. Screw the cable plug in place, observing the maximum torque of 1 Nm.