Fantini Cosmi B70A pressure switch – 0.5 ÷ 7 bar

Three-pole pressure switch for direct control of three-phase motors

The Fantini Cosmi B70A is a regulating pressure switch designed for the direct control of three-phase (and single-phase) electric motors of pumps, compressors and autoclave units , both in domestic and industrial settings.

It is the ideal solution when you want reliable pressure control with direct connection to the motor, without the need for a contactor , simplifying the system and reducing components.

The Fantini Cosmi B70A is a robust, precise, and reliable pressure switch, designed to operate directly on three-phase motors. Its solid construction, double contact break, and adjustable scale and differential make it a professional solution for pressurization systems, autoclave units, and compression systems requiring safe and long-lasting control.

An essential technical component, simple to install, but with the performance of a truly professional system.

What is it for and how does it work?

The B70A controls engine starting and stopping based on fluid pressure:

It is equipped with 3 normally closed power contacts .
When the pressure increases and exceeds the cut-out value , the contacts open and the motor stops.
When the pressure drops below the attack value , the contacts close again and the engine restarts.

The differential is adjustable and is added to the attack pressure value to determine the disconnect pressure.

Main features

Adjustment range (connection pressure): 0.5 ÷ 7 bar
Adjustable differential (min. 0.8 bar – max 3.5 bar)
Maximum pressure of the sensitive element: 12 bar
Sensitive element with rubber membrane , suitable for chemically compatible gases or liquids
G 1/4 female hydraulic connection
Degree of protection IP40
Cover made of shockproof thermoplastic material
Galvanized steel metal parts
Two cable glands and ground connection

Electrical characteristics

Double pole break switch with silver alloy contacts
Rated insulation voltage (Ui): 415 V~
Rated continuous service current (Ith): 25 A
Rated operational current:
- AC-1: 20 A
- AC-3: 9 A
Power ratings of controllable three-phase motors (AC-3):
- 2.2 kW (3 HP) at 220/240 V~
- 4 kW (5.5 HP) at 380/415 V~

Terms of Use

Maximum controlled fluid temperature: 90°C
Pressure switch body temperature: up to 60°C
Complies with CEI EN 60947-1 standards

WARRANTY

The warranty is the official FantiniCosmi Italia one and lasts 2 years.

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