Multi-Segment Bimetallic Design

The VELAN® multi-segemnt bimetallic design detects the difference in temperature between steam and condensate at the same pressure. The bimetal stack relaxes when cooled a certain amount below saturated temperature releasing condensate. This is the only bimetal design on the market that will follow the steam curve at intermediate pressures due to the multiple stacks of bimetallic plates in the trap.

Pressure Ranges


  • 0-4000 psig

Size Ranges


  • 1/2"
  • 3/4"
  • 1"
  • 1 1/2"
  • 2"
  • Forged A105 carbon steel body and cover.
  • Cast CF8M stainless steel body.
  • Forged F22 chrome moly steel body and cover.
  • Forged F91 chrome moly steel body and cover.
  • Maximum body design conditions: ANSI/ASME class 300/600/900/1500/2500/4500
  • Pressure assisted fail-open design.
  • WILL NOT PLUG due to copper and iron oxides in the system. Condensate flashes on the discharge side of the orifice.
  • Discharges hot condensate in a modulating fashion at approximately 18ºF (10ºC) below saturation temperature throughout the operating range. One internal element for all pressure ranges.
  • Unaffected by water hammer or superheat.
  • Self draining - WILL NOT FREEZE when installed in gravity draining position.
  • Automatically vents air and non-condensable gases and has a high (7:1) cold water capacity for rapid start-up.
  • Operates with ZERO STEAM LOSS throughout its operating range saving steam and money during the life of the trap.
  • Can be installed in any position.
  • Internal stainless steel strainer, with optional blow-off valve.
  • Integral check valve design.
  • The advanced cage unit design in Velan steam traps combines a bimetal element, hardened Rc 58 min. ball valve and STELLITE6® hardfaced seat area all in one factory-tested unit.