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a (CMS) Models: CMS240,CMS260, CMS280, CMS300, CMS330, CMS360 – Differences & SelectionCMS240 / 260 / 280 / 300 / 330 / 360 are mainstream grades of Carbon Molecular Sieve. The numbers represent nitrogen yield (Nm³/h·t) at 99.5% N₂ purity. Higher model numbers mean higher nitrogen production efficiency, better performance for high-purity nitrogen, but also higher cost and higher bulk density.
| Model | Nitrogen Yield @99.5% | Nitrogen Yield @99.9% | High-Purity Capability (up to 99.999%) | Particle Size | Bulk Density | Crush Strength | Application Positioning |
|---|---|---|---|---|---|---|---|
| CMS‑240 | 240 | 175 | General | 1.2–1.4 mm | 640–660 g/L | ≥70 N | Economical general‑purpose |
| CMS‑260 | 260 | 190 | Medium | 1.1–1.3 mm | 650–670 g/L | ≥80 N | Mainstream high-efficiency |
| CMS‑280 | 280 | 210 | Good | 1.0–1.2 mm | 660–680 g/L | ≥90 N | High-purity & energy-saving |
| CMS‑300 | 300 | 230 | Better | 1.0–1.2 mm | 670–690 g/L | ≥95 N | High-efficiency ultra‑high purity |
| CMS‑330 | 330 | 250 | Excellent | 0.9–1.1 mm | 680–700 g/L | ≥100 N | Large‑flow & ultra‑high purity |
| CMS‑360 | 360 | 270 | Top | 0.9–1.1 mm | 690–710 g/L | ≥110 N | Premium & special applications |
Pore structure: Higher‑number CMS has more uniform micropores (0.31–0.38 nm), with higher O₂/N₂ separation factor.
Adsorption kinetics: Higher grades allow faster oxygen diffusion and less nitrogen retention, improving purity in short cycles.
Strength & density: Higher‑model CMS has higher crush strength and bulk density, reducing dusting and extending service life.
95%–99% (general industrial): CMS‑240
99.5%–99.9% (common high‑purity): CMS‑260 / 280
99.99%–99.999% (ultra‑high purity): CMS‑300 / 330
99.9995%+ (special high‑end): CMS‑360
Small flow (<50 Nm³/h): CMS‑240 / 260
Medium flow (50–500 Nm³/h): CMS‑260 / 280
Large flow (>500 Nm³/h): CMS‑330 / 360
Low pressure (0.6–0.7 MPa): prefer CMS‑280 and above
Frequent start/stop: choose CMS‑260+ for better anti‑dusting performance
Retrofit projects: upgrade from CMS‑240 to CMS‑260 for ~10% higher output and ~8% lower power consumption
Budget‑focused general use: CMS‑240
Best balance of cost & performance: CMS‑260 (most widely used)
High purity & energy saving: CMS‑280
Large flow / long service life: CMS‑330
Top‑tier purity requirements: CMS‑360
Note: Using high‑grade CMS for low‑purity applications causes overinvestment and inefficient use.
