BURKERT 332174 (Type 6407) is a servo-assisted 2/2-way piston valve. The fixed coupling between the pilot valve and the piston provides an opening of the valve without a pressure difference. As a piston valve, the Type 6407 is particularly suitable for media such as gas and steam, as well as liquids with low operating temperatures below 0 °C. The stopper and the core guide pipe are welded together to enhance pressure resistance and leak-tightness.

Model 332174 features a brass body with G 1 1/4 internal threads, a 32 mm orifice (DN 32), and PTFE/graphite seals. It operates on 230V 50Hz and is designed for a pressure range of 0 to 10 bar. The coils are moulded with chemically resistant epoxy, and in combination with a plug according to DIN EN 175301-803 Form A, the valve satisfies the IP65 degree of protection.

Key Features

• Servo-assisted piston valve (DN 32 orifice for model 332174)
• Safe opening with hard-coupled piston system without differential pressure
• Vibration-resistant, push-over coil system
• Suitable for neutral gases and liquids (e.g., compressed air, water, hydraulic oil, hot water, and steam)

Circuit Function

Circuit function A (CF A): 2/2-way solenoid valve, servo-controlled, normally closed.

Technical Data

Property	Value
Seal Material	PTFE and graphite
Body Material	Brass
Coil Material	Epoxy (Thermal insulation class H)
Duty Cycle	100% continuous operation
Switching Time (DN 32)	Opening: 80 ms / Closing: 900 ms
Voltage Tolerance	±10%
Medium Temperature	-40 °C to +150 °C
Ambient Temperature	-40 °C to +45 °C
Viscosity	Max. 21 mm²/s (21 cSt)
Degree of Protection	IP65 with cable plug
Installation Position	As required, preferably with actuator upright

Materials (Threaded Body)

No.	Element	Material
1	Coil	Epoxy
2	Stopper	Stainless steel 1.4113/434
3	Spring	Stainless steel 1.4310/301
4	Armature guide tube	Stainless steel 1.4303/305/308
5	Core	Stainless steel 1.4113/434
6	Cover	Brass
7	Seal	PTFE
8	Piston ring	PTFE
9	Sealing ring	Graphite
10	Plunger	Brass
11	Piston seal	PTFE
12	Body	Brass

Dimensions

Note: Dimensions in mm. The dimensions D1 and F1 apply to G thread.

DN	A1	B1	D1 (G thread)	F1	E1	L1	SW
32	142.7	167.7	G 1 1/4	20	85	126	50

Installation & Safety

DANGER: High Pressure

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.

DANGER: Electric Shock

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

Installation Recommendations

• Clean pipelines of dirt before installation.
• Install a dirt trap upstream of the valve inlet (≤ 500 µm).
• Hold the device on the body using an appropriate tool (e.g., open-end wrench) and screw into the pipeline. Do not use the solenoid as a lever arm.
• The valve body must not be installed under tension.
• Observe the flow direction: the arrow on the body indicates the flow direction.