L-27

Best selling liquid controllers
Control of liquids
Pneumatic controllers

Intended use

The pneumatic level controller is used to control 1 level in liquids at atmospheric pressure. Model with electrical microswitch output. Besides liquids can control fluid mixtures that allow the tube to be cleaned after the level of mixture downs.

The liquid or mixture that is controlled must not emit vapours that rarify the entrapped air inside the tube. This could be provoke a misfunction of the device.

Function

The controllers bases their function on the pneumatic outline. The controllers have an electric microswitch activated due to a membrane sensitive to pressure.

The action on the microswitch is carried out by the pressure of the air column entrapped inside the tube and the pressure chamber. Depending on the model, a water height of 40 mm.w.c. is sufficient to trigger the switch.

There are models with a micro pneumatic valve and there are other models that activate the switch due to a depression.

The models with sensitivity adjustment “SR”, the models with double signal “DS”and the models with “A99” switch have a regulation system with a spring that allows the adjusment of the sensitivity. Tightening the regulation nut to reduce the sensitivity and increase the strain of the liquid to activate the microswitch.

Mechanical connection

Make a hole wide enough to introduce the tube or fix it with the mounting accesory usuable.

Ensure of the water-tightness of the unions. Do not use tow or Teflon tapes, only screw the tube to the housing up to the base gasket.

In lateral mounting, ensure of a minimum height of the tube of 200 mm minimum after the elbow.

Dimensions

Approximate measures given in mm.

Technical data


Name	Pneumatic controller
Type	L-27 – ref: 2401 L-27 VITON – ref: 2402
Type of signal	Single signal
Actuating pressure	Above the tube inlet; ±20 mm WG
L-27	+80 mm WG
L-27 VITON	+90 mm WG
Tank pressure	Atmospherical
Maximum pressure	+0,5 bar
Cable entry	M20x1,5
Switching voltage	250 V AC
Switching function	1 NO + 1 NC
Capacity of the contact	15 A / 250 V AC (for resistive loads) For inductive or capacitive loads reduce at 50%
Ambient temperature	-5° C – +60° C
Protection	IP53 according to DIN EN60529
Weight	1,5 Kg
Materials:
Housing and cap	Aluminium (plastic under request)
Pressure chamber (base)	Glass reinforced Polyester (Under request Aluminium)
Membrane	NBR (Under request Viton)
Base gasket	EPDM
Xicle antiturbulence (under request)	Brass
Tube connection screw	G 1" female