General Characteristics
These solenoid valves are suitable for non-aggressive liquid and gaseous media that are compatible with the construction materials used in the valves.
Materials
Body in OT58 brass, generally with female G threaded ports. Internal parts and guide tube in stainless steel. Seals according to application: NBR (nitrile-butylene elastomer), FPM (fluorocarbon elastomer), PTFE (reinforced polytetrafluorethylene), EPDM (ethlene-propylene elastomer), INOX (stainless steel), RUB (synthetic corundum on stainless steel), VMQ (silicone elastomer), PFPM (perfluorate elastomer).
Coils
Comply with EC standards, directive 73/23CEE and relative modification 93/68EEC. Coils wound with class H wire, vacuum impregnated with polyester resin. Class F insulation (155°C) encapsulated in glass fibre reinforced PBT (polybutylene-terephtalate) or class H insulation (180°C) encapsulated in glass fibre reinforced PPS (polyphenylsulphide), or class A (105°C) for latching versions in PP-VO (self-extinguishing polypropylene).
Standard electrical connections (2 poles plus earth) for type Z1-Z5-Z6-Z8-Z9 coils and DIN 43650 connections for Z1-Z5-Z9. also suitable for 6.3x0.8, exept for Z0 type designed for 2.8x0.5. Quick connectors or for micro plug connectors. Protection class IP65 EN 60529 (DIN 43650) with coil duly fitted with the plug connector. With the exception of certain versions, all the coils have obtained SEV-ASE (Swiss) approval and are suitable for continuous duty (ED 100%).
Voltages
Standard: 24-100-220-230V/50Hz AC and 12-24V DC. Other voltages and frequencies supplied on request subject to minimum quantites. Voltage tolerances: +10° -15% for AC; +10% -5% for DC. standard voltage for latching versions: 6-12V DC; tolerance: ±10%.
Response Time
The time requested to pass from fully open to fully closed or vice-versa is a function of the size of the orifice, the operating system, the voltage value, the typ of medium, the relative pressure and temperature and the preesure drop (Dp). Depending on the diameter of the orifice, the responce time is about few tens of milliseconds for diect acting valves and hundreds or thousands of milliseconds for pilot-acting or forced lifting (zero pressure) valves.
Useful Life
The useful life of the solenoid valve is influenced by the pressure, temperature, type of medium and the voltage. Generally speaking, these solenoid valves are reliable for more than 2 million cycles and, in clearly defined cases and with special treatments, for a much larger number of operations.
Options
On request, solenoid valves can be supplied for special applications to different designs and with different materials or performances. On request and subject to minimum quantities, the following can be supplied: different seals, nickel plated (Ni-P) brass bodies or PTFE (polytetrafluorethylene) coated bodies and general features complying with BGA-FDA-NSF standards, other types of connections (NPT, or male etc.), coils with flying leads. also available with domestic approval (IMQ) and international approvals (UL, VDE, WRC etc.)