Alternative Fuels




Check Valves

Hoke 691F Series High Performance Check Valves

Hoke 691F Series Check Valve

Designed specifically for the Alternative Fuels Industry and the extremes of station and vehicle service.

Features

  • Prevents back flow - Withstands high opening shocks without damage
  • 316 stainless steel components
  • Panel mounting standard
  • Blowout proof design
  • PED Certified

Applications

  • CNG and H2 Systems
  • Severe Service

Specifications

  • Operating Pressure: 5000 psig @ 70°F (345 bar @ 21°C)
  • Operating Temperature: −65°F to +275°F (−54°C to +135°C)
  • Differential Cracking Pressures: 1/3 psi to 50 psi

Circle Seal 2300 Series Check Valve

Circle Seal Controls 2300 Series Check Valve

Features

  • Prevents backflow
  • High pressure capabilities
  • Cushioned, quiet closing
  • PED certified
  • Blow out proof design – withstands high vibration

Applications

  • Compressed gas service
  • Equipment protection

Specifications

  • Body Materials and Operating Pressures
    • Aluminum/brass: 0–5000 psig (345 bar)
    • 303 stainless steel: 0–7500 psig (517 bar)
    • 17-4 stainless steel: 0–10,000 psig (690 bar)
  • Cracking Pressures 0.5–5 psig standard
  • Seal materials include Buna-N, Viton, EPDM, PTFE, and Neoprene

Circle Seal CV99-700 Series

Circle Seal Controls CV99-700 Series Check Valve
A 3/8″ spring loaded ball check valve with autoclave MP connections for 700 bar GH2 service. This valve can be used to prevent backflow of air into tanks and vehicle fuel lines, and for filling station operations.
  • A 3/8″ spring loaded ball check valve design with autoclave MP connections for 700 bar service.
  • Leak free performance at high pressure
  • 2-piece construction for ease of maintenance
  • Specially cleaned for GH2 service

Specifications

  • Maximum operating pressure: 0–10,150 psig (700 bar)
  • Operating temperature: −40° F to +185° F (−40° C to +85° C)


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