Yarway Hy-Drop Throttling Valve


Critical Service
Flashing, Cavitation
Flow Characteristics
Carbon Steel, Metal, Steel
Pressure Class
Shutoff Class
Class V (FCI 70-2)
Valve Size
NPS 1-1/2 / DN 40, NPS 1 / DN 25, NPS 1-1/4 / DN 32
Valve Size Standard
Valve Type
Globe, Angle Valve, Angle
ASME B31.1
End Connection
Socket Weld


  • Dual range throttling – primary range plus a super capacity blast range.
  • Rapid energy dissipation – controls the destructive forces inherent in high pressure drop service.
  • Accurate and repeatable settings – micrometer dial assures setting accuracy and positive resetting capability.
  • Quick-change disc – insert an interchangeable stem-disc into the same valve body to convert from one orifice size to another.
  • Guided-disc – eliminates disc vibration and chatter.
  • Loose disc: Disc design provides multiposition seating and assures positive alignment of seat and disc surfaces. This gives sure protection against premature failures from seat-to-disc “grind” prevalent in valves of integral stem-disc design.
  • Dual-purpose disc – separate surfaces for shutoff and throttling.
  • Stellite seat – resists corrosion and wiredrawing.
  • In-line repair – Yarway reseating tool can be used to cut a new seat in-line.
  • Resetting capability: The Hy-Drop® valve has positive resetting capability to accommodate multiple-operation programs with accurate flow control variations.