Direct-acting valves
Precise and fast control
for systems from 0 bar.
The operating principle: Direct, fast and pressure-independent
In direct-acting solenoid valves, the solenoid armature opens and closes the valve seat directly – without any detours or the need for a differential pressure in the system. This simple and robust design enables extremely fast response times and makes them the ideal choice for applications that require reliable switching from 0 bar.
111
directly controlled with
Separation membrane,
liquid dampened
Design 2/2-way
Actuation type direct controlled
Nominal diameter 2.0 mm - 6.0 mm
Pressure range 0.00 - 6.0 bar
KV value 2.1 - 9.5 l/min
Housing material PVC, PTFE,
Connection threaded socket G1/4, adhesive socket d16, welding socket d16
136
directly controlled with PTFE bellows
Design 2/2-way
Actuation type direct controlled
Nominal diameter 15.0 mm - 50.0 mm
Pressure range 0.00 - 0.5 bar
KV value 3.2 - 38.0 m³/h
Housing material PVC, PP
Connection adhesive socket, welding socket
148
directly controlled with PTFE bellows
Design 2/2-way
Actuation type direct controlled
Nominal diameter 2.0 mm - 8.0 mm
Pressure range 0.00 - 6.0 bar
KV value 1.8 - 9.0 l/min
Housing material PVC, PTFE
Pressure/temperature diagram
Connection threaded socket G1/4, adhesive socket d12
150
directly controlled with PTFE bellows
Design 2/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm-20.0 mm
Pressure range 0.00 - 2.0 bar
KV value 20.7 - 53.0 l/min
Housing material PVC, PP, PTFE
Connection adhesive socket,
welding socket, threaded socket
266
Design 2/2-way
Actuation type direct controlled
Nominal diameter 2.0 mm - 6.0 mm
Pressure range 0.00 - 100.0 bar
KV value 2.5 - 9.5 l/min
Temperature medium-10 to +100°C
ConnectionG1/4, G3/8
small nominal diameter -
high pressures
267
Ideal for
Gas applications
Design 2/2-way
Actuation type direct controlled
Nominal width 1.0 mm - 6.0 mm
Pressure range 0.00 - 300.0 bar
KV value 0.7 - 10.7 l/min
Temperature medium -10 to +100°C
Connection G1/4, G3/8
269
Design 2/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 25.0
Pressure range 0.00 - 20.0 bar
KV value 2.5 - 12.3 m³/h
Temperature medium -10 to +100°C
ConnectionG1/4, G3/8, G1/2, G3/4,
G1, G1 1/4
270
classic
Type2/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 50.0 mm
Pressure range 0.00 - 40.0 bar
KV value 2.5 - 47.2 m³/h
Temperature medium -10 to +100°C
Connection See table
271
Design 2/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 32.0 mm
Pressure range 0.00 - 64.0 bar
KV value 2.5 - 20.0 m³/h
Temperature medium -10 to +100°C
Connection See table
272
Design 2/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 32.0 mm
Pressure range0.00 - 100.0 bar
KV value 2.5 - 20.0 m³/h
Housing materialBrass, stainless steel 1.4305, stainless steel 1.4571
Temperature medium-10 to +100°C
ConnectionSee table
270-X
classic
Design 2/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 50.0 mm
Pressure range 0.00 - 40.0 bar
KV value 2.5 - 47.2 m³/h
Housing materialBrass, Aluminium
Temperature medium -10 to +100°C
Connection G1/4, G3/8, G1/2, G3/4, G1, G1 1/4, G1 1/2, G2
​
271-X
​
Design 2/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 32.0 mm
Pressure range 0.00 - 64.0 bar
KV value 2.5 - 20.0 m³/h
Housing materialBrass, Aluminium
Temperature medium-10 to+100°C
ConnectionG1/4, G3/8, G1/2, G3/4, G1, G1 1/4, G1 1/2
272-X
​
Design 2/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 32.0 mm
Pressure range 0.00 - 100.0 bar
KV value 2.5 - 20.0 m³/h
Housing material
Brass, aluminum
Temperature medium-10 to +100°C
Connection G1/4, G3/8, G1/2, G3/4, G1, G1 1/4, G1 1/2
390
Design 3/2-way
Actuation type direct controlled
Nominal diameter 10.0 mm - 15.0 mm
Pressure range 0.00 - 20.0 bar
KV value 2.5 - 5.6 m³/h
Housing material brass, stainless steel 1.4305, stainless steel 1.4571
Temperature medium -20 to +40°C
Connection G1/4, G3/8, G1/2, G3/4
Technical details and areas of application
To help you make an informed choice, you will find an overview of the key features of direct-acting valves here.
Advantages:​
-
Fast response time: The direct magnetic drive enables extremely fast switching operations.
-
Pressure independent: Full functionality from 0 bar, as no minimum pressure difference is required.
-
Simple design: Fewer components mean high reliability and low maintenance.
-
Compact design: Ideal for installations with limited space.
Disadvantages:​
-
Limited flow: Due to its design, not suitable for very large volume flows.
-
Higher energy consumption: For larger nominal diameters, the magnet must apply full force to open.
Typical applications:​
Low pressure & vacuum systems: Wherever there is no differential pressure.
Precision controls: For the exact dosing of small quantities of liquid or gas, e.g. in laboratory or medical technology.
Small appliances: In devices such as coffee machines or analytical devices.
Maintenance and installation:​
Low maintenance: The simple design with few moving parts ensures a long service life.
Flexible installation: Since no pressure difference is required, the valves can be installed in any position and in any flow direction.
"Precision and speed – directly controlled solenoid valves
for reliable control even at low pressure."
Your contact for high-quality and reliable valve solutions.
MMER
Automation
Since 1958
WE SAY THANK YOU FOR ALMOST 70 YEARS OF TRUST.