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ASCO™ Series HOV1B Hydramotor Valves
Hydramotor Valves HOV1B ASCO
The ASCO Series HOV1B are bronze-bodied safety valves electro-hydraulically operated to provide reliable on-off control of fuel oil.
The valves´ spring-loaded, stem-guided PTFE seat opens within 9 seconds of power application and closes within 1 second of power interruption. The valves are agency-approved for fuel oil safety shutoff. The HOV1B Series consist of a flexible two-piece actuator and the valve body design that is ideal for OEMs who want both actuator and body as a set, and for end users and distributors who want to minimize inventory by mixing/matching separate actuators and valve bodies. The HOV 1B Series are suitable for boilers/burners, ovens/furnaces, kilns/incinerators, and heating equipment.
ASCO™ Series HOV1B Hydramotor Valves


Valve Actuation
Body Material
Cast Iron
Natural Gas
Pipe / Port Size
1 "; 1 1/4 "; 1 1/2 "; 2 "; 2 1/2 "; 3 "
Port Type
Flange, NPTF
2 way - 2/2 Normally Closed
Over 14.0 Cv
120 AC, 230 AC
Max Differential / Max Operating Pressure
Vacuum to 150 PSIG
Operating Environment
Hazardous, Indoor, Outdoor
Standards / Regulations
CSA, FM, Type 1, Type 4, Type 7, UL


  • Self-contained, hermetically sealed, pull-type electrohydraulic actuator has motor/pump unit immersed in oil, reducing wear and enhancing reliability
  • Rugged construction and broad ambient temperature range (-40F to 150F) permit use in challenging environments
  • Type 1 General Purpose enclosure standard, optional Type 4, 7 Watertight and Explosion-proof enclosure for hazardous locations
  • H118 Series offers 1-inch to 3-inch NPT and 4-inch flange end connections flow range from Cv 124 to 510 and operating pressures from 4 psi to 20 psi
  • Visual indication of valve open & closed position is standard
  • Optional valve seal over travel and electrical interlock proof of closure switch available.
  • Mountable in any position for installation flexibility
  • UL Listed, FM Approved, CSA Certified


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