Multi-Function Control Valves

With extensive knowledge of On Board Refueling Vapor Recovery systems, Stant has developed a sophisticated yet simple multi-function control valve that incorporates several valve functions in a small package. The multi-function control valve provides an efficient alternative in ORVR system architecture and a great opportunity to realize system cost reductions.

Design features

• Refueling
  • Consistent, accurate, and adjustable shut-off height
  • Adjustable round-up volume
  • Excellent system refueling quality
• Rollover protection
  • Redundant sealing and internal liquid trap
• Venting
  • Dynamic—limit hydrocarbon loading to canister through  a controlled orifice
  • Grade—integrated grade valve allows venting during full take grade soak
• LEV II compliant
• Eliminated liquid carryover during high temperature, high altitude dynamic maneuvering
• Provides control vapor recirculation flow during system refueling
• Protects carbon canister in the event a failed refueling nozzle occurs
• Flexible mounting (hot plate weld, flange direct mount, internal bracket mount for PZEV)
• System pressure communication hub (tank, filler tube, carbon canister)
  • Controls vapor flow during system refueling and normal driving conditions

Design Integration

• Can be incorporated in an open fuel vapor system with minimal changes
• Allows flexible integration to plastic and steel fuel tanks
• Single tooling accommodates multiple applications (fully utilizing tooling capacity)

System Cost Advantages

• Reduce number of valves
• Reduce number of vapor line connections and length
• Reduce carbon canister size (vapor loading and purging through controlled orifice during running loss mode)
• Eliminate system liquid trap
• Facilitate assembly of fuel tank and vehicle
• Design commonality reduces tooling cost and development cycle for multiple platforms
• Designs available for welding onto the fuel tank or mounting to an in-tank module

Physical Dimensions and Key Features: