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For Steam Service up to 600 psig (42 bar)...Capacities to 2,500 lb/hr (1,134 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 will have a longer service life than typical disc traps. This enhanced performance will ensure that maintenance time is minimized and steam costs are greatly reduced.

The CD-33 is designed with three discharge ports, which offer stable disc operation to extend trap 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 1/2" and 3/4" only) 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.

Advantages
  • Three discharge port design
  • Minimum wear with controlled cycling
  • Freeze-resistant
  • Hardened seat and disc
Specification
Steam trap shall be stainless steel thermodynamic type, integral seat design with hardened disc and seating surfaces, and electroless nickel plated finish. When required, trap shall be supplied with an integral Y strainer, integral blowdown valve or rain guard insulating cap. Maximum allowable pressure (vessel design) shall be 915 psig @ 752ºF (63 bar @ 400ºC). Maximum operating pressure shall be 600 psig @ 752ºF (41 bar @ 400ºC).
Unit of Measure
1 

Item #

Dimension - A

Height - B

Length - C

Top of Cap - D

Weight

Quantity
CD-33 N/A 1 7/16 in1 3/4 in37 mm44 mm N/A 2 1/2 in3 1/8 in63 mm79 mm N/A 3 5/16 in3 15/16 in84 mm100 mm N/A 1 3/4 in2 1/4 in44 mm57 mm N/A 1.4 lb2.5 lb0.64 kg1.1 kg
CD-33S N/A 1 7/16 in1 3/4 in37 mm44 mm N/A 4 1/4 in4 3/4 in108 mm121 mm N/A 3 1/2 in4 1/8 in89 mm105 mm N/A 1 3/4 in2 1/4 in44 mm57 mm N/A 2.2 lb3.25 lb1.0 kg1.5 kg
CD-33L N/A 1 7/16 in36 mm N/A 2 1/2 in63 mm N/A 3 5/16 in84 mm N/A 1 3/4 in44 mm N/A 1.41 lb0.64 kg
CD-33SL N/A 1 7/16 in36 mm N/A 4 1/4 in108 mm N/A 3 1/2 in89 mm N/A 1 3/4 in44 mm N/A 2.2 lb1.0 kg
Unit of Measure
1