ASCO 553 Solenoid Valves – SIL 3 Spool Valve Explosion Proof (IEC 61508)

ASCO 553 solenoid vale explosion proof. T&D are an ASCO Numatics Authorised Distribution Channel.

ASCO 553 solenoid vale explosion proof. T&D are an ASCO Numatics Authorised Distribution Channel.

ASCO 553 solenoid valves are part of the ASCO Red Hat range of valves.

ASCO 553 solenoid valves are compact spool valves with single and dual solenoid constructions available. In addition unique designs are available that combine hard T-seals and flexible o-rings.

The ASCO 553 provides resistance to dirt and multi-million cycle life controlling air or inert gas and low power and Intrinsically safe constructions are available.

Low power and intrinsically safe construction are available along with an integral breather block vents to spring side of actuator to exhaust.

The unique design of the ASCO 553 solenoid valves provides bubble-tight shutoff, resistance to dirt and multimillion cycle life controlling air or inert gas.

ASCO 553 Solenoid Valves – product specifications

Valve Parts in Contact with Fluids
BodyAluminum, Black AnodizedBrass316L Stainless Steel
End Cover (Spring end)Glass-filled PolyamideBrass316L Stainless Steel
Spool Valve InternalsZamak, Stainless Steel, Acetal (POM), AluminumBrass, Acetal (POM), Delrin
Pilot End CoversAluminum, Black AnodizedBrass316L Stainless Steel
Core TubeStainless Steel
Core and PlugnutStainless Steel
SpringsStainless Steel
Seals and DiscsNBR
Top DiscNylon (PA)
Core GuideAcetal
Seat and Seat InsertBrass, Aceta
Shading CoilCopper
Rider Ring (low power)PTFE

ASCO 553 Solenoid Valves – Electrical characteristics

Standard Coil and Class of InsulationRating and Power ConsumptionSpare Coil Part Number
DC WattsACGeneral PurposeExplosionproof
WattsVA HoldingVA InrushACDCACDC


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 – hazardousSIL IEC 61508 - Solenoid Valves 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.

Solenoid Valves ASCO

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