Who Is Glenco Air & Power? Australia's Air Compressor Specialists Explained

The compressed air system is the most consistently underengineered utility in the Australian workshop. Electrical systems are designed by licensed electricians to a code. Hydraulic systems on major plant are specified by engineers. But compressed air — which powers as much or more of the productive equipment in a typical fabrication or maintenance workshop — is usually specified by whoever is at the trade counter at the time the compressor is needed, working from a remembered air tool count and an approximate budget.

The consequences are predictable and common: a compressor running at near-maximum duty cycle, air tools performing below specification, moisture in the air lines causing damage to spray guns and pneumatic equipment, and a noise level in the workshop that reflects an undersized piston compressor working hard rather than a properly specified rotary screw running quietly.

Glenco Air & Power has operated as a compressed air specialist in Australia since 1984. That operational history, combined with the brand's technical focus on compressed air as a system rather than a product, makes it a different kind of supplier for this category.

Who Glenco Air & Power Is

Glenco was established in 1984 with a specific focus on compressed air — compressors, air tools, pressure vessels, fittings, hose, and the associated infrastructure that constitutes a complete compressed air system. For workshops sourcing Glenco products through a trusted welding supplier and service provider in Australia, compressed air equipment sits alongside welding machines, consumables, and workshop tooling under one supply account. The brand has maintained this specialist focus for four decades, which is unusual in an industry where many suppliers have broadened into general industrial distribution.

The practical significance of that specialist focus: Glenco's sales and technical staff understand compressed air as a system, not as a product catalogue. The ability to have a technically grounded conversation about duty cycle, air demand, air quality requirements, and pipe sizing is a different experience from dealing with a generalist supplier who can take a compressor order but cannot advise on whether the specification is correct.

Glenco's product range covers: piston (reciprocating) air compressors, rotary screw compressors, oil-free compressors, air tools, pressure vessels and air receivers, air treatment equipment (filters, regulators, lubricators, dryers, moisture separators), fittings, hose, and compressed air distribution components.

The Air Demand Calculation: What Most Workshops Skip

Every compressed air system specification should begin with an air demand calculation. In practice, the majority of Australian workshops specify their compressed air system by a different method: approximate tool count, a round number for tank size, and a horsepower figure that sounds about right.

Step 1 — List every air-powered tool or piece of equipment in the workshop. Include not just the tools in current use but any planned equipment for the foreseeable future. A compressor sized for current demand becomes undersized within two years in a growing workshop.

Step 2 — Record the CFM or L/min requirement for each tool.

Tool	Approximate Air Demand
1/2" Impact Wrench	4–6 CFM (113–170 L/min)
3/4" Impact Wrench	7–10 CFM (200–283 L/min)
4.5" Angle Grinder	5–8 CFM (142–227 L/min)
Die Grinder	4–6 CFM (113–170 L/min)
Needle Scaler	8–12 CFM (227–340 L/min)
Spray Gun (HVLP)	10–15 CFM (283–425 L/min)
Sand Blast Cabinet	15–25 CFM (425–708 L/min)
Brad Nailer	0.5–1 CFM (14–28 L/min)

Step 3 — Determine the simultaneous use factor. Not every tool runs simultaneously. Calculate the demand of tools that will run at the same time, add a 20–25% reserve margin, and that figure drives the compressor specification.

Step 4 — Consider the delivery pressure requirement. Most workshop air tools operate at 90 PSI (620 kPa) working pressure. The compressor needs to deliver adequate volume at that pressure at the tool, accounting for pressure drop through the distribution system.

Piston vs Rotary Screw: The Decision Most Workshops Get Wrong

Piston Compressors:

• Duty cycle: Typically rated for intermittent duty — commonly 50–75% for smaller single-stage units. A compressor running above its rated duty cycle runs hotter, wears faster, and has a shortened service life.

• Noise: A 10 HP piston compressor generates 85–90 dB(A) at 1 metre — near the WHS noise exposure threshold and a genuine workplace hazard in small enclosed workshops.

• Capital cost: Significantly lower than rotary screw for equivalent output. For workshops with genuinely intermittent air demand, this cost advantage is real.

  
  

Rotary Screw Compressors:

• Duty cycle: Designed for 100% continuous duty. This is the critical differentiator for workshops with sustained air demand.

• Noise: Typically 65–75 dB(A) at 1 metre — dramatically quieter than equivalent piston units.

• Capital cost: Higher than piston for equivalent output, but the lifecycle cost calculation typically favours rotary screw in continuous-use applications.

Factor	Piston Compressor	Rotary Screw
Air demand profile	Intermittent (< 60% duty cycle)	Sustained or continuous
Noise sensitivity	High noise acceptable	Quieter working environment required
Capital budget	Lower initial cost	Higher initial cost, lower lifecycle cost
Workshop size	Small to medium	Medium to large
Application	General workshop	Paint shop, production, sustained air tools

When evaluating a Glenco air compressor for a workshop, the first conversation should be about the air demand profile — not the tank size or horsepower figure on the spec sheet.

Air Treatment: The Infrastructure Most Workshops Under-Invest In

Moisture Management:

The compression process concentrates atmospheric water vapour, and when compressed air cools in the distribution system, water condensation forms. This condensate causes rust and corrosion inside air tool housings, poor paint finish quality in spray applications, premature failure of pneumatic control components, and ice formation at the tool in high-expansion applications.

The correct moisture management sequence is: after-cooler at the compressor output, properly sized and regularly drained air receiver, coalescing filter to remove liquid water and oil aerosol, and — for applications requiring very dry air — a refrigerated or desiccant air dryer.

Filter, Regulator, Lubricator (FRL) Units:

FRL units provide point-of-use air treatment — filtering liquid water and particulate, regulating working pressure to the tool's specified inlet pressure, and injecting a fine oil mist for air tools that require lubrication. The lubricator is critical for air tool longevity. Dry air through a vane-motor air tool causes accelerated vane wear. Most air tool manufacturers specify that the tool must receive lubricated air — failure to provide it voids the warranty and shortens tool life.

Pipe Sizing and Pressure Drop

Pressure drop through the air distribution system is the most common and most frequently misdiagnosed cause of air tool underperformance. It manifests as "the compressor is too small" when the actual problem is that the distribution system is too restrictive.

• Main ring mains should be 25mm or 32mm internal diameter aluminium or galvanised steel pipe

• Drop legs from the ring main to tool stations should be of adequate diameter for the tool being served

• Final connection hoses should be as short as practical

• Multiple quick-connect fittings between the ring main and the tool create cumulative restriction — a real source of performance reduction

  
  

WHS and Regulatory Obligations

Pressure vessel registration: Air receivers above 150L capacity and operating above 150 kPa are registrable plant items under the WHS Regulations in most Australian jurisdictions. For Queensland-based workshops, finding a Glenco Air Power supplier Queensland with the technical knowledge to advise on compliance obligations is as important as the product purchase itself. Registration requires: registration with the relevant state regulator, inspection by a competent person at defined intervals, and maintenance of inspection records.

Noise exposure: A piston compressor generating 88 dB(A) in a workshop where workers are present represents a noise exposure risk. The WHS exposure standard for noise is 85 dB(A) averaged over an 8-hour day. Glenco's rotary screw range typically operates at 65–75 dB(A) — a meaningful reduction from equivalent piston units.

Whip checks: Compressed air hose connections operating above 700 kPa are required in most Australian states to have whip check safety cables fitted at couplings. This is a WHS Regulation requirement, not a recommendation.

FAQs: Glenco Air & Power

1. How do I know if my compressor is undersized for my workshop?  An undersized compressor runs continuously without reaching cut-out pressure during normal use, air tools lose speed and power during extended operation, the motor runs hot, and tool performance varies noticeably between the start of a shift and mid-operation. The correct response is an air demand calculation — adding a larger receiver tank does not resolve an undersized compressor.

2. What is the difference between a single-stage and two-stage piston compressor?  A single-stage compressor compresses air from atmospheric pressure to delivery pressure in one stroke. A two-stage compressor compresses to an intermediate pressure, cools the air through an intercooler, then compresses to final delivery pressure — producing more efficient compression and cooler, drier air at delivery pressures above approximately 700 kPa. Two-stage units are the appropriate choice for workshops requiring sustained high-pressure output.

3. Do I need a refrigerated dryer for a welding and fabrication workshop?  For general fabrication work — running grinders, impact wrenches, and scalers — a properly drained air receiver with a coalescing filter is typically adequate. A refrigerated dryer becomes necessary for paint or coating applications (moisture causes finish defects), plasma cutting (moisture degrades arc quality and shortens consumable life), and pneumatic control systems.

4. How often should an air compressor be serviced?  Oil-lubricated piston compressors require an oil change at 500–1,000 operating hours or annually (whichever comes first), plus belt and air filter service. Rotary screw compressors require oil service at 2,000–4,000 hours depending on oil type, plus separator element replacement at defined intervals. Always follow the manufacturer's schedule — overdue oil in a rotary screw unit causes accelerated wear and reduced thermal performance.

5. What size air receiver do I need?  As a general rule, an air receiver of 6–10 times the compressor's CFM output in litres provides adequate buffer for most workshop applications — for example, a 15 CFM compressor paired with a 200L receiver is a reasonable minimum. Larger receiver volume reduces compressor cycling frequency and helps manage moisture in intermittent-use applications.

WeldConnect stocks the Glenco Air & Power range nationally — to buy Glenco air compressor Australia-wide, connect through our trade channels or contact the team for compressor specification advice, pricing, and availability.