Fantini CosmiSwitches & Thermostats

Fantini Cosmi Adjustment pressure switch B12DN4 5-16 bar

Fantini Cosmi B12DN4 is an adjustment pressure switch designed for hydraulic and pneumatic systems, operating across 5–16 bar with a 1–3.5 bar differential range. Its G 1/4 flange connection and IP40 protection suit…

SKU 3G-CBM-03561

Also listed as: FAN 04222 · FAN-04222

Brand

Fantini Cosmi

Item

Adjustment pressure switch B12DN4 5-16 bar

Local availability & support — Singapore

Local office: 20 Woodlands Link #09-05, Singapore 738733
Phone: +65 8878 8355
Delivery: Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment: Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to: Singapore

Technical Specifications

Fantini Cosmi

model

B12DN 

connection

G 1/4 flange 

differential bar

1 to 3.5 

protection degree

IP40 

pressure range bar

5 to 16 

max fluid temperature c

120

Datasheet Content

FAN04210 à 38

     Pressure switches up to 28 bar
     with adjustable differential
     Pressure switches for control and regulation of all fluids and non-explosive gases. Suitable for compression
     plants, boilers, tanks, autoclaves, ventilation plants, lubrication plants.


                                                                                                    88                  49




                                                                                58
                                                                                                                                     95




                              Range                 Differential          Sensitive element   Connection   Protection        Availability
                                                                           max. pressure         G/14       degree
                                bar                      bar                     bar
     B12CN                   -0,2 ÷ 8                  0,6 ÷ 3                   9              flange       IP40             in stock
     B12DN                     5 ÷ 16                  1 ÷ 3,5                   18             flange       IP40             in stock
     B12EN                    8 ÷ 28                    2÷6                      32             flange       IP40             in stock
     B12CRN                  -0,2 ÷ 8                  0,6 ÷ 3                   9                  SAE      IP40             in stock
     B12ERN                   -8 ÷ 28                   2÷6                      32                 SAE      IP40             in stock
     B12CN4                  -0,2 ÷ 8                  0,6 ÷ 3                   9             threaded      IP40            on request
     B12DN4                   5 ÷ 16                   1 ÷ 3,5                   18            threaded      IP40            on request
     B12EN4                   8 ÷ 28                    2÷6                      32            threaded      IP40            on request

     WITH BLOCKING AND MANUAL RESET
     B12CMN                    1÷8                     0,6 ÷ 3                   9              flange       IP40            on request
     B12DMN                   5 ÷ 16                   1 ÷ 3,5                   18             flange       IP40            on request
     B12EMN                   8 ÷ 28                    2÷6                      32             flange       IP40            on request

     WATERPROOF CASING EXECUTION




                                                                                                               100




                                                                                                4,5
                                                                                        50

                                                                                              123                               47


     B12CNY                  -0,2 ÷ 8                  0,6 ÷ 3                   9              flange       IP65             in stock
     B12DNY                    5 ÷ 16                  1 ÷ 3,5                   18             flange       IP65             in stock
     B12ENY                   8 ÷ 28                    2÷6                      32             flange       IP65             in stock
     B12CRNY                 -0,2 ÷ 8                  0,6 ÷ 3                   9              flange       IP65             in stock
     B12ERNY                  8 ÷ 28                    2÷6                      32             flange       IP65             in stock
     1 Bar = 100Kpa *The differential must be deducted from the range value.
14
ELECTRICAL FEATURES
Snap action SPDT microswitch, contacts in
                                                               EXAMPLE OF ELECTRICAL WIRING
AgCdO.                                                   P


                                               1    4   2                                                           1




Nominal insulation tension		       Ui 415V~                                                                     2       4    R - RESET
Continuous duty nominal current    Ith 16A                                                                                   0 - STOP

Operating nominal current Ie       220V- 380/415V~
Resistive load             AC-1    -        16A                              P
Inductive load             AC-3    -        6A
                                                                                                                            A2
Continuous current         DC-13   0,2A     -                        1   4   2
                                                                                                                            A1




HOMOLOGATION AND STANDARDS
Complies with EN 60947-4-1 standards.



INSTALLATION
Direct installation on the pipe.                                                              MOUNTING MODEL
Pressure element connection G 1/4.
                                                                                                                    N° 2 fori M4
In case of fluid temperatures higher than the maximum allowed, connect the
pressure switch to the pipe by inserting a metallic spiral between the pressure
switch and the pipe to facilitate heat dispersion.
Possibility of mounting on metallic clamp, exept for the waterproof casing versions.                    35 mm




OPERATION
When pressure increases: 1-2 opens, 1-4 closes.
In the pressure switch with blocking and manual reset at maximum pressure, the reset takes place when the pressure is below
the value set on differential.


FEATURES
Sensitive element with stainless steel membrane, laser welded.
Metallic frame.
Cover in shockproof thermoplastic material.
Output connections with PVC cable gland.
Fixed differential.
Flange connection G 1/4 (17 mm key).
Maximum temperature of the controlled fluid: 120 °C.
Pressure switch body admissible temperature: -35 ÷ 60°C.
Storage and transport temperature: -35 ÷ 60°C.
Unit weight: 0,43 Kg B12AN.
Unit weight: 0,44 Kg B12BN.



ACCESSORIES
                  303298LA
                  G1/2 cable gland in V0 self-extinguishing, shockproof thermoplastic material for output connections.




                  2593367
                  Protection casing IP44.


                                                                                                                                         15

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Fantini Cosmi Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

Frequently Asked Questions

What is the Fantini Cosmi B12DN4 adjustment pressure switch used for?

The Fantini Cosmi B12DN4 is used for control and regulation of fluids and non-explosive gases in hydraulic and pneumatic systems. Typical applications include compression plants, boilers, tanks, autoclaves, ventilation plants, and lubrication plants. It provides adjustable differential pressure switching for industrial process control and equipment protection.

What are the specifications of the Fantini Cosmi B12DN4 pressure switch?

The B12DN4 has a pressure range of 5 to 16 bar with an adjustable differential of 1 to 3.5 bar. It features a G 1/4 threaded connection, IP40 protection degree, and a maximum fluid temperature of 120 °C. The sensitive element uses a stainless steel membrane, and the switch includes a snap-action SPDT microswitch rated for 16 A continuous duty.

Where to buy the Fantini Cosmi B12DN4 in Singapore?

3G Electric supplies the Fantini Cosmi B12DN4 adjustment pressure switch to Singapore. We handle sourcing, logistics, customs clearance, and local delivery for industrial clients. Contact our team for pricing and lead time on this model. We provide technical support for selection and application in hydraulic and pneumatic systems.

How to install the Fantini Cosmi B12DN4 pressure switch?

Install the B12DN4 directly on the pipe using its G 1/4 threaded connection. If fluid temperature exceeds 120 °C, insert a metallic spiral between the switch and pipe for heat dissipation. The switch can be mounted on a 35 mm metallic clamp. Ensure wiring follows the SPDT microswitch diagram: terminals 1-2 open and 1-4 close on pressure increase.

Used in

Common applications for Fantini Cosmi

Oil-fired boiler burner control — Fantini Cosmi ambient thermostat C16I and pressure switch B12HNY for fuel-pump lockout and room-temperature feedback.

Pneumatic compressor load management — B12DN or B13CN pressure switch for unload-valve control and tank cutout in 5–150 bar air systems.

Hydronic heating-plant commissioning — B12GNY and B12CRNY switches for pump-discharge and low-pressure monitoring in chilled-water and hot-water loops.

Industrial steam and hot-water vessel safety — B12HNY high-pressure switch and A96D/A95B level regulators for water-level and overpressure interlocks.

Thermal-storage tank management — A95B and A96D liquid-level regulators with 15-meter cable reach for boiler-makeup and expansion-tank applications.

Portable pump and pressure-test equipment — B12DN with adjustable differential for mobile hydraulic-circuit monitoring and component proof-pressure validation.

Fantini Cosmi Products

3G Electric supplies Fantini Cosmi switches & thermostats. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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