HOW TO ORDER

W4A=type and range of regulation
A= normally open contacts (N.O.), state "C" for normally closed (N.C.)

F= fast-on electric connections, state "O" for screw type connections.
1= 1/4"BSP threaded port, state "2" for 1/8"BSPT and "3" for M10x1.

/250= preset value in millibar, omit in case you do not require preset at factory.

/P1= rubber protection indispensable to protect the instrument from dirt and moistness.

W4 adjustable vacuum switches permit opening or closing an electric circuit in order to reach a predetermined depressurization value.

The preset vacuum value is found by adjusting the screw located at the center of the instrument. Rotate the external screw clockwise to decrease and counter-clockwise to increase the value. Mechanical stops protect both the spring and the electrical contact from over pressurizations.

The main characteristic of this series is that this miniature vacuum switch can be totally dismantled.]

It can be mounted in any position.

Working temperature: from -20°C to+80°C

Switching frequency: 120 cycles/min.

Switching accuracy: w 7 % of set pressure

Fixed hysteresis value: about 15 % of set value

Electrical connection: fast-on 6.3mm

Electrical protection according to

DIN 40050: IP 54 with rubber cup protection

Maximum contact load:

Alternating current up to 42 Volts - 2 Amp

Direct current up to 42 Volts - 1 Amp

-W4X with fluid port connection made in AISI 316 stainless steel

-Viton seals

-body in brass

We reserve the right to make modifications to construction without prior notice.