Pressure Switch B71A 1.5–4.5 bar – Double-Pole Presostat for Pumps, G 1/4" F – SPECIAL OFFER
Code: SI0B71AProduct detailed description
Pressure switch B71A (code SI0B71A) is a direct control device for electric motors of pumps, compressors and domestic or industrial pressure vessels. It is suitable for liquids and gases that are chemically compatible with its internal membrane. The contacts open at increasing pressure, so the pump turns off when the set pressure is reached and turns on again when the pressure drops.
Technical data
- pressure setting range 1.5–4.5 bar, factory set to 1.4–2.8 bar
- differential 1.0–2.1 bar at minimum and 1.2–2.3 bar at maximum setting, maximum 2.3 bar
- double-pole switch, contacts made of silver alloy, Ui 415 V~, Ith 15 A, AC-1 up to 12 A, AC-3 up to 3 A
- threaded connection G 1/4" with internal thread, protection class IP20
- max. liquid temperature 70 °C, body temperature −15 to +60 °C, weight 0.35 kg
- housing made of impact-resistant thermoplastic, metal parts made of steel, grounding terminal, two cable glands, conformity with EN 60947-5-1
Setting and installation
The switch is mounted directly into the pipe. The switching pressure is increased by tightening the adjusting nut, and the cut-off pressure is increased by tightening the differential nut. It controls motors up to 3 A without a contactor. Installation and connection of electrical parts must be carried out only by a person with electrical qualifications.
Technical parameters
| Code | SI0B71A |
| Brand | IVAR |
| Type | DAB.PRISLUSENSTVI |
| Model | B71A |
| Setting range | 1.5–4.5 bar |
| Factory setting | 1.4–2.8 bar |
| Differential | 1.0–2.1 / 1.2–2.3 bar |
| Connection | G 1/4" internal thread |
| Contacts | double-pole, Ith 15 A, AC-3 up to 3 A |
| Protection class | IP20 |
| Max. liquid temperature | 70 °C |
| Weight | 0.35 kg |
Frequently asked questions
What pressure can be set on the B71A switch?
The switching pressure can be set in the range of 1.5–4.5 bar. The switch is factory set to 1.4–2.8 bar.
Can the switch directly control a pump motor?
Yes, the double-pole contact controls electric motors up to 3 A (AC-3) without a contactor. For motors with higher current, a contactor must be used.
How is the switching and cut-off pressure changed?
Tightening the adjusting nut increases the switching pressure, and tightening the differential nut increases the cut-off pressure. The setting should be done by a specialist.
Additional parameters
| Category: | DAB. Pressure Switches |
|---|---|
| Warranty: | 2 years |
| Weight: | 0.35 kg |
| Availability: | In stock or at supplier |
| Code: | SI0B71A |
| Brand: | IVAR |
| Type: | DAB.PRISLUSENSTVI |
| Model: | B71A |
| Setting range: | 1.5–4.5 bar |
| Factory setting: | 1.4–2.8 bar |
| Differential: | 1.0–2.1 / 1.2–2.3 bar |
| Connection: | G 1/4" female thread |
| Contacts: | two-pole, Ith 15 A, AC-3 up to 3 A |
| Protection rating: | IP20 |
| Max. fluid temperature: | 70 °C |
| Weight: | 0.35 kg |
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IVAR designs, develops and manufactures highly energy-efficient heating and plumbing systems. We have over 10,000 catalogue items - mass-produced products and unique items - in addition to customised systems and combinations of complex products. And it’s all “Made in Italy”.
Vision
To make life easier for our clients, our clients' customers and our employees, thanks to our ability to be constantly innovative.
Mission
To design and manufacture advanced hydronic solutions that reduce installation complexity and energy consumption.
“Made in Italy” adds value
IVAR has been producing heating and plumbing system components since 1985: valves for heating bodies, direct heat metering modules, heat cost allocators, pipes and fittings, substations for heating systems, distribution manifolds, radiant panel systems, and components for solar and geothermal systems. And it’s all “Made in Italy”.
Over 200 people are employed at our manufacturing facilities in Prevalle (in northern Italy’s Brescia province). The site has been designed to streamline our many production and operational stages.
The Italian headquarters also acts as a hub for the wider IVAR Group, set up with the goal of distributing products beyond Italy’s borders. The group now has 11 branches, in Australia, Belgium, China, Germany, the United Kingdom, the Czech Republic, Romania, Slovakia, Spain, the United States and Tunisia.
Know How
Research, development and numerous laboratory tests guarantee that our clients’ requests can be translated into new high-efficiency products.
The stages required for production take place internally, beginning with hot forming, which is carried out at our subsidiary Valmon Stampati. Our continuous implementation of projects under the Industry 4.0 initiative also allows us to take full advantage of new releases in technology and IT to improve our manufacturing efficiency.
As a company, IVAR is constantly evolving. Every day, we invest in strengthening our products, in improving our production processes and in attaining new patents and certifications.