ASCO HV434 Solenoid Valves – Class 1 Div 1 Gas Shutoff Valve NACE Compliant

ASCO HV434 solenoid valves

ASCO HV434 solenoid valves. T&D are an ASCO Numatics Authorised Distribution Channel.

ASCO HV434 solenoid valves are part of the ASCO Red Hat range of valves.

ASCO HV434 solenoid valves are low temperature stainless steel gas shutoff valves offering proof of closure combining a unique double disc design with a rugged 303 SST GO Switch to provide electrical indication of valve “closed” position.

The low power of the ASCO solenoid HV434 significantly reduces energy consumption to 0.85 watt (hold) making the valves ideal for use in areas where there is low or minimal power levels.

In addition, the low ambient operating temperature range, the valves can be used in temperatures of -40°F/°C as they are designed with low temperature sealing material.

ASCO HV434 Solenoid Valves – Product Benefits

Other benefits of the ASCO HV434 solenoid valves include:

Zero minimum pressure differential – This provides robust operation in locations where there is low supply pressure.

Superior performance – The design of the valve features a large pilot orifice providing consistent and reliable operation.

Explosion proof – Both operator and POC switch meet Class I, Div. 1 for use in hazardous locations.

Agency approvals – The ASCO HV434 is approved by the CSA for the following:

  • Approved for Hazardous Locations
  • Meets Automatic Gas Valves Z21.21, CSA 6.5 C/I Safety Shutoff Standard
  • Compiles with ANSI/ISA – single seal requirements

Typical applications for the ASCO HV434 include:

  • Oil Batteries
  • Incinerators
  • Tank Heaters
  • Flare Stacks
  • Line Heaters

ASCO HV434 Solenoid Valves – Product Specifications

Product FamilyVoltageGas Capacity (BTU/hr)Pipe Sizes (in)Max OPD (psi)Sealing MaterialAmbient Temperature °F (°C)
DC Low Power (Peak & Hold)HV43469612V, 24V6,509,0001″35Low Temp. NBR-40 to 125 (-40 to 52)


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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