Compressor classes by delivery pressure — identify the high-pressure range For air compressors, which delivery pressure range typically characterizes a “high-pressure” compressor?

Introduction / Context:
Air compressors are often grouped by delivery pressure: low-, medium-, and high-pressure. While exact cutoffs vary by source, industrial practice commonly considers double-digit bar levels as high-pressure for general-purpose air delivery.

Given Data / Assumptions:

• Gauge pressures typical of plant compressed air systems.
• Not referring to specialized ultra-high-pressure compressors (> 200 bar).

Concept / Approach:
General classifications: low (up to a few bar), medium (about 5–10 bar), and high (10 bar and above). Among the presented options, the band that clearly lies in the high-pressure category is 10 to 15 bar.

Step-by-Step Solution:
Compare listed ranges to conventional categories.Identify the only clearly high-pressure range among the choices: 10–15 bar.Select 10 to 15 bar.

Verification / Alternative check:
Many factory systems run at 6–8 bar (medium). Specialty tools and processes use 10–15 bar lines (high) before moving to booster or hydraulic solutions for higher pressures.

Why Other Options Are Wrong:
(a), (b), and (c) correspond to low to medium ranges; (e) is near atmospheric and not representative of a standard delivery category.

Common Pitfalls:
Confusing absolute and gauge pressure; the industry shorthand usually references gauge values.

Final Answer:
10 to 15 bar