High Capacity Piston-Operated Steam Traps

  • Piston cage unit: The advanced piston cage unit design combines a liner, piston, main seat and main valve into one factory-tested assembly to ensure precise alignment and simple maintenance. In the SPF Type there is also a bimetallic cage unit.
  • Valve seats CoCr alloy hardfaced: The main and pilot valve seats are CoCr alloy hardfaced to increase their resistance to the high degree of wear through velocity of flow, dirt and scale.
  • Small and lightweight design for piping convenience, no mounting brackets required.
  • All in one construction unit: Air vent, main valve, check valve, strainer and temperature controller are a single unit, ensuring perfect alignment and ease of maintenance.
  • Positive closing: As steam contacts the bimetal element, the pull closes the pilot valve, reducing the pressure on the piston. Line pressure below the main valve closes the valve tightly on the seat.
  • Positive condensate drainage for process work.
  • Check valve operation: The main valve acts as a check valve preventing back flow.
  • Temperature controller controls and adjusts the discharge temperature of condensate which can be calibrated using a special thermometer.
  • Other options include: Piping King units; thermometer; strainer blowdown valve (SP only). SPF 0-7 (only) can include a “Y” Type strainer in line to protect trap.


Size Range(s)

  • NPS 1 – 3
  • (DN 25 – 80)

Pressure Rating

  • PMO up to 1500 PSI

Standard Connections

  • Socket Weld, Threaded, Butt Weld, Flanged