Atos is the only worldwide manufacturer offering a full range of digital proportionals with outstanding performances and rugged design.
Servo and servo-proportional valves control pressure or flow, and ultimately, force or velocity. Unlike simple directional valves, they can maintain any position between fully open in one direction or the other.
One example of servo valve use is in blow molding where the servo valve controls the wall thickness of extruded plastic making up the bottle or container by use of a deformable die. The mechanical feedback has been replaced by an electric feedback with a position transducer. Integrated electronics close the position loop for the spool. These valves are suitable for electrohydraulic position, velocity, pressure or force control systems with extremely high dynamic response requirements.
More specifically, electrohydraulic proportional directional control valves with pressure and flow (P/Q) manufactured by Atos support the requirements of plastic injection molding, metal die casting, and cushion control of vertical presses. The valves control hydraulic fluid flow to quickly move machine elements into position, then control pressure applied by the cylinder for tight control of the particular process. The valves also greatly simplify the machine architecture by integrating the functions previously performed by multiple proportional controls into a single digital proportional valve. The valves control hydraulic fluid flow to quickly move machine elements into position, then control pressure applied by the cylinder for tight control of the particular process.
Another example of the use of servo valves would be in the Aircraft industry when used to regulate the flow of fuel into a turbofan engine governed by FADEC
IFP brand partner Atos manufacturers an array of innovative digital proportional valves with on-board electronics designed for functional safety standards and certified by a notified body. They meet safety standards by performing the safety function in addition to axis motion control or standard valve regulation.
Certified safety valves eliminate the need for machine manufacturers to validate such components in compliance with the applicable safety standards. The main benefit is that a considerable amount of time is saved during the machine design, resulting in a simplification of the system certification process.
The Machine Directive 2006/42/EC with relevant harmonized standards IEC 61508 Safety Integrity Level (SIL) and ISO 13849 Performance Level (PL) define the general principles concerning machine safety which manufacturers must consider in order to limit risks related to machine operation.
Some certification categories from Atos product, as an example include:
Proportional & on-off valves, ISO & screw-in cartridges and servo-cylinders TÜV certified according to safety directives.
Machine Directive 2006/42/ECIEC 61508 & ISO 13849
Flameproof Ex-d & intrinsic safety Ex-ia valves, cylinders and systems certified according to the main international standards.
ATEX, IECEx, EAC, UL, MA, PESO
Pressure, flow, check valves and pressure switches in subplate, in-line, screw-in or modular execution.
Pressure relief valves certified to PED 2014/68/EU
In the last year, functional safety in hydraulic systems has become more and more important and is no longer optional; it’s now a basic requirement for every manufacturer. Certified valves support engineers in designing safer systems without wasting time in components validation versus the applicable safety standards.
Hydraulic systems designers need to extend their competence and responsibility in dealing with safety regulations related to the risk prevention for workers and equipment in case of system fault or human error.
Learn more about Atos; watch this video on YouTube: https://youtu.be/yNZs8_eL5Wo
Atos also manufactures stainless steel valves, cylinders & servo cylinders, pumps, filters, blocks, and complete systems. Visit the Atos brand page on the IFP marketing site at: https://www.ifpusa.com/suppliers/atos
At IFP we have adequate stock and great pricing – of Atos NG06 and NG10 Directional Proportional Valves and the S* Series valves (SDHE/SDKE/SDHL). Contact your Territory Sales Manager for pricing or contact IFP at firstname.lastname@example.org.