MacPress is a regular pressure switch for hidrofor systems with expansion vessel.

MacPress must be installed on the pipe, where it can sense the system’s pressure. The device operates between two pressure value: a starting, and a stopping pressure value.

When the system’s pressure drops below the pre-set start pressure (by opening a tap), MacPress sense it, and start the pump. When the water collecting process is over, and we close the tap, the pressure will increase. When the pressure reach the pre-set stopping value, stop the pump.

The housing colors: Blue is one phase, red is three phase

Mounting	On pipe
Protection rating	IP 44
Operating temperature	0°C ÷ +50°C
Connections	1/4″ F (can be ordered 1/2″ F)
Rated Current	16 (10) and 25 (16) A
Power supply	117 / 230 / 400 V~ 50-60Hz
Approval	CE
Dimensions	112 x 105 x 55 mm
Weight	0,37 kg

Modell	Line Voltage	Factory settings	Pressure range
MPM3	One phase	2 – 3 bar	1,5 – 6 bar
MPM6	One phase	4 – 5,5 bar	4 – 10 bar
MPT3	Three phase	2 – 3 bar	1,5 – 6 bar
MPT6	Three phase	4 – 5,5 bar	4 – 10 bar

Pressure switch for normal hidrofor system (with expansion vessel).

Operates between two pressure value (starting and stopping). When the pressure in the system drops below the starting value, the pressure switch start the pump. As soon as the pressure increase in the system, and reach the stopping value, the pressure switch will shut down the pump.

	PM/5	PT/6	PM/12	PT/5	PT/6	PT/12
Pressure range	1 – 5 bar	1.5 – 5.5 bar	3 – 12 bar	1 – 5 bar	1.5 – 5.5 bar	3 – 12 bar
Factory settings	1.4 – 2.8 bar	1.8 – 3 bar	5 – 7 bar	1.4 – 2.8 bar	1.8 – 3 bar	5 – 7 bar
Min. differential	0.6 bar	0.8 bar	1.5 bar	0.6 bar	0.8 bar	1.5 bar
Max. differential	2.3 bar	2.2 bar	5 bar	2.3 bar	2.2 bar	5 bar
Rated current	16 (10) A	16 (10) A	16 (10) A	16 (10) A	16 (10) A	16 (10) A
Rated voltage	250 V	250 V	250 V	250 V	250 V	250 V

PM/5-3 W

PM/5-2 W

This pressure switch is a PM/5 but widen with a housing. The housing contain 3 or 2 threads (see the data sheet) for easy install on the hidrofor system, and a pressure gauge.

The operation principle is the same as the PM/5 pressure switch:

Operates between two pressure value (starting and stopping). When the pressure in the system drops below the starting value, the pressure switch start the pump. As soon as the pressure increase in the system, and reach the stopping value, the pressure switch will shut down the pump.

	PM/5-3W	PM/5-2W
Pressure range	1 – 5 bar	1.5 – 5.5 bar
Factory settings	1.4 – 2.8 bar	1.8 – 3 bar
Min. differental	0.6 bar	0.8 bar
Max. differentak	2.3 bar	2.2 bar
Rated current	16 (10) A	16 (10) A
Rated voltage	250 V	250 V
Connections	1″ Male	1/4″ Male
	1″ Female	1″ Female
	1″ Female	–
Pressure gauge	Ø 40 mm 0-6 bar / 0-86 PSI	Ø 40 mm 0-6 bar / 0-86 PSI

In case of direct connections (when the MP/5-3 W turn on/off the motor), the motor’s power cannot be higher than 1.1 kW. With an adequacy magnetic switch it can be increased.

PS pressure switches are for different technological water system control. They are used most in firefight water systems. With the SPDT relay contact, can operate two pump at once:

If the electric pump stop by any malfunction, the pressure in the firefight water system will cease. The pressure switch sense the drop, and the SPDT microswitch will switch on a pump drived by petrol engine.

Data sheet	PS/3	PS/3D	PS/5	PS/5D	PS/12	PS/12D
Max. factory pressure	5 bar	5 bar	12 bar	12 bar	12 bar	12 bar
Pre-set pressure	0.9 – 2 bar	0.9 – 5 bar	1.7 – 5 bar	1.7 – 7.5 bar	2.5 – 10 bar	2.5 – 12 bar
Min. pressure differential	0.2 bar	0.4 bar	0.5 bar	0.5 bar	0.8 bar	0.8 bar
Max. pressure differential	0.2 bar	2.5 bar	0.7 bar	3.3 bar	1.4 bar	3.8 bar
Max. voltage	5 A – 250 V

• Vacuum switch, useful for protecting the pump against dry running during draining of basins, tanks or cisterns
• The switch, which is fi tted on the suction pipe, controls the vacuum generated by the pump
• The system is activated manually using the start lever which, when lowered, starts the pump running; this action leads to the creation of the vacuum which automatically determines the closure of the contacts. When the liquid supply is about to run out, the vacuum in the suction line disappears and so the switch deactivates the pump
• Variable distance between the switch and the end of the suction pipe (from 0 to 4 m / 0 to 157 ½ inches)
• Normally open brass alloy contacts with Ag-Ni insert
• Oil-resistant NBR rubber membrane
• Max ambient temperature 55°C

	VC100
Connections	1/4″ Female
Rated voltage	250 V
Rated current	16 (10) A
Setting values	1.5 – 2 – 2.5 – 4 – 4.5 inHg