Armstrong CD-72SR Controlled Disc Steam Trap
CD-72SR disc trap: to 935 lb/hr, 600 psig MOP, hardened seat. RFQ + selection help.
RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Disc-style steam trap engineered to control cycle rate for longer life than typical disc traps — three discharge ports for stable disc operation, capacities to about 935 lb/hr, forged-steel construction to 1010 psig allowable / 600 psig operating, for large main drips, process equipment, and constant-pressure HVAC heating.
Key advantages
- Controlled cycling — OEM design reduces cycle rate vs typical disc traps to cut wear and steam loss.
- Three discharge ports — Stable disc operation for extended operating life.
- Pressure / capacity — Capacities to 935 lb/hr (435 kg/hr); MAP 1010 psig @ 750 °F; MOP 600 psig @ 486 °F.
- Hardened internals — Disc and seat ASTM A564 Type 630 H900; integral SS strainer screen.
- Serviceable — In-line repairable; freeze-resistant; weldable; screwed / socketweld / flanged connections.
Typical applications
- Large steam main drip legs at constant pressure.
- Process equipment condensate drainage suited to disc traps.
- HVAC heating equipment on constant-pressure steam.
Selection guide
- Size — 1/2 in, 3/4 in, or 1 in (DN15 / DN20 / DN25).
- Connection — Screwed NPT/BSPT, socketweld, or flanged (DIN/ANSI welded — consult factory for face-to-face).
- Pressure — Confirm operating pressure ≥ OEM minimum (~3.5–5 psig per literature) and ≤ 600 psig MOP.
- Back pressure — OEM IOM suggests limiting back pressure (unstable above ~50–70%; may not shut above 80% of inlet).
Common mistakes
- Using a disc trap on highly modulating low-load duties better suited to other trap types.
- Ignoring back-pressure limits — high return pressure can prevent shutoff.
- Ordering flanged face-to-face without confirming the welded flange drawing for the piping class.
When to RFQ / what to tell us
- Connection size and type; design pressure/temperature; condensate load.
- Quantity and ship-to country.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 792253 |
| Brand | Armstrong International |
| Model | CD-72SR |
| Product type | Controlled disc steam trap |
| Capacity (OEM) | Up to 935 lb/hr (435 kg/hr) |
| Max allowable | 1010 psig @ 750 °F (69.6 barg @ 399 °C) |
| Max operating | 600 psig @ 486 °F (41.4 barg @ 252 °C) |
| Min operating | ≈3.5 psig (0.24 barg); IOM notes ≈5 psig for satisfactory operation |
| Body / cap | Forged steel ASTM A105N / A350 LF2 Cl.1 |
| Disc & seat | ASTM A564 Type 630, H900 |
| Strainer | SS Type 304, 30×30 mesh |
| Connections | Screwed, socketweld, flanged |
| Sizes | 1/2″, 3/4″, 1″ (DN15–DN25) |
| Weight (approx.) | ≈3.31 lb (1.5 kg) 1/2–3/4; ≈4.59 lb (2.0 kg) 1″ |
| Certifications (OEM page) | PED |
Documents
FAQ
Q: How does CD-72SR differ from a standard disc trap? A: OEM emphasizes controlled cycle rate and three discharge ports for longer life and lower steam loss.
Q: What sizes are available? A: 1/2, 3/4, and 1 in with screwed, socketweld, or flanged connections.
Q: What should I send for a quote? A: Size, connection type, pressure/load, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Status | Specs pending OEM datasheet merge |