ASCO 308 Solenoid Valves – Explosion Proof Manual Reset Valve (SIL 3 Approved)
ASCO 308 solenoid valves feature high flow and high pressure bodies with manual reset in order to prevent inadvertent valve start-up.
Once tripped, the ASCO 308 solenoid valve can only be manually reset making it ideal for controlling critical processes.
The ASCO 308 solenoid valves are available for latched open or latched closed operation and some constructions can be used for the control of aggressive fluids including steam.
ASCO 308 Solenoid Valves – Product Benefits
Further benefits of the ASCO 308 solenoid valves include:
- Electrically Tripped (trips when energized), No Voltage Release (trips when de-energized), or Free Handle constructions
- Intrinsically Safe constructions are available
ASCO 308 Solenoid Valves – Product Construction
|Stem||303 Stainless Steel|
|Springs||302 Stainless Steel|
|Pilot Seat Cartridge||CA (when listed)|
|Disc, Diaphragm, Seat||NBR, PA, PTFE, or stainless steel, as listed|
ASCO 308 Solenoid Valves – Operation Alternatives
Electrically tripped – The valves move to the latched position when the solenoid is de-energised and trips when receiving a continuous or momentary (at least 0.3 seconds) electrical signal. When tripped, the ASCO 308 valve can be manually cycled open/closed, however they must be reset when the solenoid has been de-energised again.
No voltage release – Valves moved to the latched position when the solenoid has been energised trips when de-energised. When the valve has been tripped they can be manually cycled open/closed, however must be reset once the solenoid has been energised again.
Free handle – The valve is moved to the latch position when the solenoid is energised and trips when it becomes de-energised. They can not be manually cycled open/closed when de-energised. The valves can be manually cycled open/closed or reset only when energised.
ASCO SOLENOID VALVES – HAZARDOUS AREA LOCATIONS, safety & standards
ASCO solenoid valves (2-way, 3-way and 4-way type including NAMUR interfaces) control the critical flow of air, gas, water, oil and steam across all industries – hazardous area solenoid valves are available for Division and Zone classifications.
Class I, Division 2 and Zone 1/Zone 2 approved solenoid valves according to ATEX, IECEx, FM, CSA and UL are available. Flameproof and explosion-proof valves can be specified for potentially explosive atmospheres where there is a presence of flammable liquids, gases or vapours.
ASCO valves improve reliability and performance of safety systems according to IEC 61508, IEC 61511 and Safety Integrity Levels (SIL) – ASCO spool valves with SIL 4 capability are SAEL listed as assessed by Exida and TÜV.
➡ Did you know? T&D Exports support the global oil, gas and petrochemical industries providing a single-source supply capability of Hazardous Area Equipment across Electrical, Mechanical, Process & Instrumentation ranges.