BURKERT 322611 (Type 6407) is a servo-assisted 2/2-way piston valve designed for reliable fluid control. This normally closed (NC) valve features a robust brass body with a stainless steel seat and PTFE sealing, making it suitable for demanding applications with medium temperatures ranging from -40 °C to 150 °C. It operates with a 24 V AC power supply and handles nominal pressures from 0 to 10 bar. The valve is equipped with a G3/4 internal thread connection and offers a high flow rate capacity.

Function and Properties

Attribute	Value
Type	6407
Valve function	A - normally closed - inlet port 1 (P/NC)
Fluidic port connection number	2
Number of switching positions	2
Actuator type	Plunger valve
Switch function	on/off
Flow	Above seat
Manual actuation	No
Media separation	No
Vacuum version	No
Installation length	100 mm

Process Connection and Orifice

Attribute	Value
Port connection 1 type	Internal thread
Port connection 1 thread marking	3/4
Port connection 1 thread type	G
Main valve orifice 1 (P)	20 mm
Kv value (water)	5.7 m³/h
QNn value (gas)	6,100 l/min

Operating Conditions

Attribute	Value
Nominal pressure min	0 bar
Nominal pressure max (liquid)	10 bar
Temperature medium min	-40 °C
Temperature medium max	150 °C
Temperature environment max	45 °C

Materials

Component	Material
Main valve wetted material	Brass
Valve seat material	Stainless steel
Seat seal material	PTFE (Polytetrafluorethylene)
Sealing toward outside material	Graphite

Electrical Data

Attribute	Value
Voltage min / rated voltage	24 V
Voltage max / rated voltage	24 V
Voltage frequency 1	60 Hz
AC voltage	Yes
DC voltage	No
Electrical connection sort	Plug pattern form A according to DIN EN 175301-803
Cable plug in delivery	Not included
Protection type IP	IP65 (max. with suitable connector)
Kick and Drop coil	Energy saving technology possible