CD-33 Series Disc Steam Trap


For steam service up to 600 psig (42 bar) . . .
Capacities to 2,500 lb/hr (1134 kg/hr)

The Armstrong CD-33 is a disc-style trap designed to control the trap’s cycle rate. By reducing the cycle rate, the Armstrong CD-33 extends its service life well beyond that of typical disc traps. This enhanced performance minimizes maintenance time and greatly reduces steam costs.

The CD-33 is designed with three discharge ports, which offer stable disc operation to extend operating life. The capacities of the Armstrong CD-33 have been engineered specifically for the following applications: large steam main drips, process equipment and HVAC heating equipment on constant pressure.

The CD-33L (low capacity) trap is designed for the low capacity applications of steam main drips and steam tracing lines. By ensuring that the capacities are designed to suit the application—and are not oversized—the CD-33 Series will last longer than other disc traps with excessive capacity ratings. Here’s why:

  • Three-discharge port design
  • Minimum wear with controlled cycling
  • Freeze resistant
  • Hardened seat and disc
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