The VELAN® MFT-S Series steam trap is used for intermediate capacity applications such as drip, process and heating, and economically combines steam trap, check valve and strainer (with optional blow-off valve) in a four-way piping layout with a convenient 6-bolt cover for easy maintenance.

Pressure Ranges


  • 0-150 psig
  • 0-230 psig
  • 0-300 psig

Size Ranges


  • 1/2"
  • 3/4"
  • 1"
  • Cast A216 GR WCB body and cover
  • Maximum design condition: ANSI/ASME class 150
  • 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 saturation temperature throughout the operating range. One internal element for all pressure ranges, however will discharge steam hot condensate when float mechanism overrides the bimetallic element.
  • 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.
  • 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.