Atos electrohydraulic solenoid valve water electrohydraulics
water electrohydraulics
is designed for applications requiring uninflammability or intrinsic
fluid eco-compatibility/non toxicity; internal parts in contact with
fluid are made in stainless steel.
The term !°water!± refers to specific HFA Water based fluids or jus
pure water instead of common mineral or synthetic oils. The HFA
emulsion is generally composed by a minimum of 95% of water
Water solenoid valves on-off Stainless steel cylinder
and only 5% (or less) of oil
& proportional
Water hydraulics is actually used in die-castings, steel plants and mining sectors. The water based fluids are
also appreciated in several applications where the final products must not be tainted by accidental contact with
fluid, for example in food, chemical and pharmaceutical industry
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options & features
Atos components are customer-tailored to fulfil requirements of
any application by a variety of special purpose options of different materials/seals & auxiliary devices(1) seals type
hydraulic fluids
mineral oil HLP, HL-DIN 51524, vegetal oil HETG - VMDA 24568 NBR-buna
water glycol HFA, HFC - DIN 51502 /WG
Components included in this catalog
phosp. ester HFD - DIN 51502, synt. ester HESS and polyglicol HEPG - VDMA 24568 /PE
are designed for oil-hydraulic systems,
special aeronautic SKYDROL - HyJet IV/V /EP
i.e. for suitable hydraulic fluids, as:
(1) water glycol (/WG) and phosp. ester (/EP) fluids involve a reduction of performances, ask for specific information
special materials
Special materials are used for specific applications, for instance: spheroidal cast iron for pressure up to 500 bar, stainless
steel for bodies and spools, non-magnetic execution for military, plastics/rubber for auxiliary parts
specific seals are applied as follows: standard for mineral & vegetal hydraulic oil
/WG special NBR-buna for water glycol fluids
/PE or phosphate esther HFD fluids & high temperature
FKM-Viton f
/EP ylene propylene for special aeronautic fluids
EPDM-eth
low temperature components /BT are supplied to withstand ambient temperature down to -40!aC, they derive from
standard versions by using stainless steel springs plus specific HNBR seals
enhanced corrosion protection
ECP - Enhanced Corrosion Protection - is applied to all Atos
valves to grant high rust resistance in open air / aggressive
environments and in long-term storage.
A valuable plus, it consists of zinc plating with black passivation
of bodies, anodizing, Geomet, plastic encapsulation and
conforms to RoHS Directive 2002/95/CE, Cr+6 free.
Photos at side show a valve after 120 hours testing in salt spray chamber !-without-with ECP treatmen
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