Bonesi Pneumatik Srl company, headquartered at Legnano (MI), has a distant origin in time, at the dawn of pneumatics in Italy: its foundation dates back to 1953!
For decades, it has produced pneumatic cylinders, from directional control valves to cylinders and FRL, all exclusively designed and manufactured by its Production Unit at Legnano (MI), proud of its policy and strategy to highlight the value of the made in Italy.
Pneumatic automation for all requirements
The company can produce components for all requirements of industrial pneumatic automation and in detail its range can be summarized as follows:
- ISO 6432 micro-cylinders from 8 to 25 mm bore
- ISO 15552 cylinders from 32 to 320 mm bore, they can be supplied in kits, too
- UNITOP and ISO 21287 compact cylinders, from 12 to 100 mm bore
- CNOMO cylinders, from 32 to 200 mm bore, they can be supplied in kits, too
- Rotary actuators, from 32 to 125 mm bore
- Pneumo-hydraulic control units, from 50 to 200 mm bore
- Power pneumo-hydraulic units
- Manually and mechanically controlled valves from 1/8″ G to 1/2″ G
- Direction control valves, both poppet and spool, available depending on the version from 1/8” G to 1” G, in the functions 2/2NA, 2/2NC, 3/2NA, 3/2NC and 5/2
- ISO valves, size 1 and 2, and Namur valves
- F.R.L. groups from 1/8” G to 1” G
- circuit accessories
Constant focus on component quality
The in-house design activity allows meeting all market requirements in short times and at competitive costs. This is made possible also by Bonesi Pneumatik production department, standing out for extreme automation including around 20 CNC.
The constant care of the quality of components and of fully verticalized machining, in a covered area taking up around 4,000 sq. m., confers reliability and high performances, durable in time and in the harshest environments, to Bonesi Pneumatik products.
The complete series of pneumatic poppet valves
In order of time, the first feather in the cap of Bonesi Pneumatik was its complete range of poppet valves from 1/8” G to 1” G.
Pneumatic poppet valves were developed in Europe in the Fifties as alternative to spool valves, at that time widely used overseas.
Significant evolutions were achieved also in Italy, still appreciated and up-to-date for the integration into pneumatic plants.
The advantages of poppet operation
The operation with poppet, compared to the spool one, features some advantages: more compact valve sizes, bigger flow rates, faster switching times and, especially, these valves are less affected by the impurities contained in the managed fluid (typically compressed air) if not adequately filtered.
In this scenario, Bonesi Pneumatik Srl at Legnano (MI) has been active protagonist since the pneumatics dawn in Italy and it still includes, in its range of pneumatic components for automation, high flow rate poppet valves with 1/8”, 1/4”, 1/2″, 3/4” and 1” GAS connections, for both compressed air and vacuum.
Pneumo-hydraulic power units
The latest series released by Bonesi Pneumatik consists in pneumo-hydraulic power units, range integration occurred through the takeover of Kratospack brand and relative know-how, necessary step to widen the offer, so become complete, of solutions to satisfy the manifold requirements in the industrial automation market.
The power unit is the synthesis of two technologies applied: the fast and cost-effective pneumatic motion, used for the approach to/return from the working area and the hydraulic force intensification, obtained through a mixed compressed air-hydraulic oil system, assuring the rigid indispensable separation between the two motor fluids. The hydraulic force development is directly proportional to the pneumatic pressure used. The power units initially proposed by the company are in 50, 63, 80, 100 and 125 mm. bores.
Pneumo-hydraulic control units
Another innovative product proposed by Bonesi Pneumatik Srl is the series of pneumo-hydraulic control units that represent the technological evolution of the patent registered in the Seventies by Generalmeccanica company in Milan, developed with the aim of combining the advantages of pneumatic cylinders’ user-friendliness with the possibility of precise motion control assured by an integrated hydraulic circuit inside the unit itself.
The use of pneumo-hydraulic control units allows implementing efficaciously functions of fast approach to the workpiece, fine regulation during the machining phase and fast return with hydraulic deceleration.
(by Gianandrea Mazzola)