ASCO HV434 Series Gas Shut-Off Valves

Brand: ASCO

The ASCO Series HV434 is a family of low-temperature, stainless-steel shutoff valves with proof of closure for on-off or gas pilot control of commercial and industrial gas burners in harsh environments.

The valves combine a unique double-disc design with a rugged 303 SST GO™ Switch to provide electrical indication of "closed" position.

Their low-power DC peak-and-hold constructions reduce energy consumption to 0.85 W (hold). The valves design with large pilot orifice provides consistent and reliable operation.
  • Requires zero minimum pressure differential for robust operation in locations with low supply pressure.
  • Solenoid operator and proof-of-closure switch have Class I, Div. 1 enclosures for use in hazardous locations.
  • Wide ambient temperature range of -40° F to 125° F (-40° C to 52° C).
  • Maximum operating pressure differential up to 50 psi (3.4 bar).
  • Resilient soft seating for tight shutoff.
  • Complies with ANSI/ISA- single-seal requirements.
  • Meets the metallurgical requirements of NACE MR0175-2003 (DC only).
  • Offered in 1" pipe size.
  • Available in AC and DC voltages.



Body Material

  • Brass - Nickel-Plated


  • From 6.0 Cv to 14.0 Cv, from 2.0 Cv to 6.0 Cv, from 1.0 Cv to 2.0 Cv


  • 2-Way - 2/2 Normally Closed

Maximum Differential, Maximum Operating Pressure

  • Vacuum to 150 psig


  • Natural Gas

Operating Environment

  • Indoor, Outdoor, Hazardous

Pipe / Port Size

  • 1/4, 1/2, 3/8, 3/4

Port Type

  • Female NPT

Standards & Regulations

  • CSA

Valve Actuation

  • Solenoid


  • 110 AC, 120 AC, 230 AC, 220 AC - 50, 60
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