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Armstrong 1/2in NPT CD-33 600lb Cast Stainless Steel Disc Trap with Inline Connection A21484

Part # : 713387
 
image description Availability: Will be backordered (Typically arrives in 30 days)
MSRP $399.97 $ 313.23

Product Description

CD-33 Series Disc Steam Trap

For steam service up to 600 psig (42 barg) 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 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


Product Specifications

  • Main Category: Steam and Filter Products
  • Brand: Armstrong
  • Brand: Armstrong International
  • Size: 1/2in
  • Weight (lbs): 1.40
  • Material: Stainless Steel
  • Finish: Stainless Steel
  • Steam Traps: Disc Traps
  • Blowdown: Blowdown Not Included
  • End Connection: Threaded
  • Maximum Operating Pressure (psi): 600psi
  • Series: CD33
  • Model: CD33
  • Part Number: A21484

Applications/Usage & Features

Controlled Disc Steam Trap
The Controlled Disc (CD) Steam Trap is a time-delayed device that operates on the velocity principle. It contains only one moving part, the disc itself. Because it is very lightweight and compact, the CD trap meets the needs of many applications where space is limited. In addition to the disc trap’s simplicity and small size, it offers advantages such as resistance to hydraulic shock, the complete discharge of all condensate when open and intermittent operation for a steady purging action.

Operation of controlled disc traps depends on the changes in pressures in the chamber where the disc operates. The Armstrong CD trap will be open as long as cold condensate is flowing. When steam or flash steam reaches the inlet orifice, velocity of flow increases, pulling the disc toward the seat. Increasing pressure in the control chambers snaps the disc closed. The subsequent pressure reduction is necessary for the trap to open. The heating chamber in the cap and a finite machine bleed groove in the disc control the pressure reduction. Once the system is up to temperature, the bleed groove controls the trap cycle rate.

Unique heating chamber
The unique heating chamber in Armstrong’s Controlled Disc Trap surrounds the disc body and control chamber. A controlled bleed from the chamber to the tap outlet controls the cycle rate. That means that the trap design—not ambient conditions—controls the cycle rate. Without this controlling feature, rain, snow and cold ambient conditions would upset the cycle rate of the trap.

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