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All Categories > Regulators (Water, Steam, Air) > Armstrong Traps > CD-33 Series Disc Trap > Item # CD-33  

Item # CD-33, CD-33 Series Disc Trap

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Image 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).





Specifications

Body
ASTM A743 Gr. CA40

Cap
ASTM A743 Gr. CA40

Disc Material
ASTM A276 Gr. 420

Strainer Screen
30 x 30 Mesh T-304 Stainless Steel

Screen Retainer
ASTM A743 Gr. CA40

Pipe Connections
1 in
1/2 in
3/4 in
15 mm
20 mm
25 mm

Dimension - A
1 7/16 in
1 3/4 in
37 mm
44 mm

Height - B
2 1/2 in
3 1/8 in
63 mm
79 mm

Length - C
3 5/16 in
3 15/16 in
84 mm
100 mm

Top of Cap - D
1 3/4 in
2 1/4 in
44 mm
57 mm

Weight
1.4 lb
2.5 lb
0.64 kg
1.1 kg

Maximum Allowable Pressure at 752ºF (Vessel Design)
915 psig

Maximum Allowable Pressure at 400ºC (Vessel Design)
63 bar

Minimum Operating Pressure
3.5 psig
0.24 bar

Maximum Operating Pressure at 486ºF
600 psig

Maximum Operating Pressure at 252ºC
41 bar

Maximum Back Pressure of Inlet Pressure
80 %

Options
Blowdown Valve (Stainless Steel)
Rain Guard Insulating Cap (1/2'', 3/4'' Sizes Only) (Stainless Steel)

Note
Designs, materials, weights and performance ratings are approximate and subject to change without notice.


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