Burkert 353673 (Type 0330) is a direct-acting, media-separated pivoted armature solenoid valve. It features maintenance-free pivoted armature technology and a vibration-proof, block screwed coil system. The 353673 variant is specifically configured as a 2/2-way normally closed valve with a brass body, FKM seals, and a 3000 mm moulded cable. The solenoid coils are moulded with a chemically resistant epoxy, and the coil system is separated from the medium by a diaphragm, making it suitable for critical media. This specific model is explosion-proof with ATEX and IECEx certifications.

General Technical Data

Property	Value
Orifice	DN 4.00 mm
Circuit function	A (2/2-way, normally closed)
Body material	Brass
Seal material	FKM (Fluor rubber)
Weight (Explosion-proof)	Metal body: 0.75 kg
Thermal insulation class	Epoxy coil class H
Duty cycle	100% continuous operation
Voltage	24 V (AC/DC)
Voltage tolerance	±10%
Medium temperature	0 °C to +90 °C
Ambient temperature	Max. +55 °C
Viscosity	Max. 37 mm²/s
Port connection	G 1/4
Electrical connection	Moulded wire cable (3000 mm)
Degree of protection	IP65

Circuit Function

The 353673 model operates with Circuit Function A (CF A).

• Circuit function A (CF A): 2/2-way solenoid valve, direct-acting, normally closed.

Approvals and Conformities

This variant features explosion protection according to category 2 (zone 1/21). The Ex marking of the components for coils with a cable outlet is:

• ATEX: EPS 16 ATEX 1 111 X / II 2G Ex mb IIC T4 Gb / II 2D Ex mb IIIC T130 °C Db
• IECEx: IECEx EPS 16.0049X / Ex mb IIC T4 Gb / Ex mb IIIC T130 °C Db

Safety Instruction

Explosion hazard. The solenoid coil forms a closed system after installation. When used in explosion-risk areas, there is a risk of explosion if the system is opened in the operating state. Do not remove or open the system during operation.

Material Specifications

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

Dimensions

Metal Body

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

Note

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

Explosion-Proof Cable Variant

Performance Specifications

Pressure Range and Flow Rate (Explosion-Proof Variant)

For the metal body, Circuit Function A, DN 4.0 mm:

Circuit function	DN	Kv value water [m³/h]	Pressure range Standard [bar]	Pressure range Vacuum [bar]
A	4.0	0.23	0...5	-0.98...3

Note: Devices with FKM diaphragms are reduced to a maximum pressure of 12 bar. Pressure data indicates overpressure to atmospheric pressure.