Temporary air only works when the hired package behaves like part of the site, not a compressor dropped beside a roller door. Flow, pressure, treatment, fuel or power, pipework connection, and inspection status all need checking before production depends on it.

Key Takeaways

• – Temporary air must match site demand, not just compressor nameplate capacity.
• – Flow, pressure, air quality, fuel or power, connection method and inspection status all need checking before connection.
• – A hired package can protect production during shutdowns or breakdowns only if treatment and pipework are specified correctly.

Search Air, Atlas Copco Premier Distributor since 2002, supports industrial sites across Yorkshire and the East Midlands from Leeds, Sheffield, and Nottingham. This guide explains what we need to know before we size temporary supply for planned works, machine failure, or bridging while a permanent unit is delayed.

Why Temporary Supply is Now a Risk-Control Decision

Temporary supply should be specified against production loss, not hire cost alone, because a few hours of undersized cover can outweigh weeks of rental charges. Recent 2025-2026 economic data shows that downtime has moved from a maintenance issue to an operational resilience issue for UK manufacturers.

Economic Impact of Downtime: Research suggests that unplanned downtime poses a severe threat to UK manufacturing, with recent data indicating potential sector-wide losses of up to £736 million per week (logisticsit.com). According to a late 2025 survey conducted by Censuswide on behalf of Fluke Corporation, 68% of UK manufacturers experienced unplanned downtime over the preceding 12 months.

What the Numbers Change

The aggregated toll of these disruptions is estimated at £736 million every week. Research indicates that 46% of UK manufacturers report between 6 and 10 downtime incidents weekly, while 15% face 11 to 20 incidents per week.

Regarding duration, 45% of respondents said outages last up to 12 hours, with 17% reporting incidents stretching up to 72 hours. The average cost of a single downtime incident in the UK is estimated at £1.36 million per hour.

Source note: (Data derived from IDS-INDATA and Fluke Corporation reporting, 2025-2026 (idsindata.co.uk)). A prolonged failure can create a singular event loss approaching £49 million, equivalent to the weekly operational output of nearly 3,900 factories.

Why Bridging Has Become Common

That downtime cost is pushing sites away from reactive maintenance and toward predictive maintenance, spare capacity planning, and temporary air strategies.

Between 2024 and 2026, downtime has increasingly been tied to cybersecurity vulnerabilities within interconnected Operational Technology networks. We’ve also seen more bridging, where a facility rents a high-capacity machine for several months while waiting for delayed delivery of a permanent replacement.

What to Measure Before You Specify the Temporary Package

The specification starts with Free Air Delivery, pressure, and air purity, then checks the installation route between the hired unit and the plant tie-in. A temporary package is not just a machine on a trailer. It’s a complete compressed supply path.

If the failed unit’s duty is unknown, the data plate gives a baseline. We often add 10-15% capacity in rental scenarios because leaks, longer pipe runs, and temporary connections can reduce usable flow at the process.

The Data You Need Before You Phone

Free Air Delivery, or FAD, is the usable volume delivered after compression losses. Pressure Dew Point, or PDP, is the temperature at which water vapour starts to condense inside the line. Boyle’s law is the simple principle behind the pressure-volume relationship, but a hire specification still needs real site data.

• Record the normal working pressure in bar or psig at the production header.
• Confirm the simultaneous downstream demand in CFM or litres per second.
• Identify whether production needs 100% oil-free air or filtered lubricated supply.
• Measure the distance from the hire location to the tie-in point.
• Check whether the site can provide electrical power or needs diesel generation.

Capacity Versus Nameplate

A third-shift line operating at 750 cfm and 108 psig shouldn’t be covered by matching the nameplate alone. If most of the flow sits behind a 15 psig reduction and the site loses air through timer drains, the temporary set-up must solve distribution losses as well as generation.

Air Quality and Connections

Distributors must assess the application to specify whether Class 0 oil-free air or oil-lubricated air with appropriate filtration is required. For food, pharmaceutical, and paint applications, that decision should be tied to ISO 8573-1, ISO 9001:2015 quality procedures, and the existing risk assessment.

For standard indoor manufacturing, refrigerant drying is often specified to a PDP of +3°C. Outdoor pipework in winter, or moisture-sensitive production, usually needs a tower desiccant dryer capable of -40°C or -70°C.

Connection Hardware and Condensate Control

The connection package matters because a hired machine can make enough volume while tools still see a pressure drop at the point of use. Hose bore, receiver position, drain condition, and isolation access all affect whether temporary air behaves like a stable production supply.

• Match coarse, fine, and activated carbon filters to the site quality class.
• Use pressure-rated air hose that is correctly sized and safety whip-checked.
• Add drip legs, a sump tank, and accessible drain valves to reduce water carryover.
• Check the solenoid drain condition before the hire set is loaded.
• Keep outlet valves and the service valve accessible during isolation.

If these details are missed, the plant may have enough compressor capacity but still lose pressure, purity, or drying performance at the process.

Compliance Checks Before a Hired Unit is Connected

Regulatory compliance matters. Temporary and hired compressed air installations must be checked against PSSR 2000 (hse.gov.uk), including whether a valid Written Scheme of Examination is required.

Under UK rules, systems containing a relevant fluid include compressed air at more than 0.5 bar above atmospheric pressure. Before qualifying pressure equipment can be legally operated, a Written Scheme of Examination must be established.

What the Procurement Contract Should State

The system must be inspected in accordance with the WSE by a competent person, typically a chartered engineer with specific pressure systems expertise. The user must establish safe operating limits, including maximum pressure and temperature thresholds.

• State who owns the inspection record for the hired package.
• Confirm whether the rental provider is acting as the competent person.
• Define which receivers, dryers, hoses, and filters sit inside the examination scope.
• Record what safe limits apply at the tie-in and at the receiver.
• Explain how isolation is documented if the permanent plant remains connected.

The British Compressed Air Society (bcas.org.uk) is a useful reference point for compressed air practice, but statutory duties still sit with the user and owner under pressure system law. That distinction matters during a breakdown response, when speed can make people skip paperwork.

What May Change Next

Emerging consultations point toward digital monitoring and condition-based maintenance frameworks. The Isle of Man is updating its own framework to mirror UK standards, with draft Pressure Systems Safety Regulations 2026 (consult.gov.im), or PSSR 2026, slated for commencement in August 2028.

For Leeds, Bradford, Sheffield, Derby, and Nottingham sites, treat temporary documentation like permanent plant documentation.

How to Protect Permanent Machines During Changeover

Planned works can damage idle machines if permanent units are stopped badly. The handover plan should cover moisture, oil circulation, inverter condition, dryer status, and safe restart.

Shutdown Details That Matter

Atlas Copco provides manufacturer guidance on stopping and restarting machines (atlascopco.com). For VSD units, operators should carry out a programmed stop while leaving electrical power on so the capacitor bank remains charged and the inverter drive is protected before restart.

Water-cooled units need the water supply isolated after the stop command. Failure to do so can allow condensate to form inside internal elements, leading to internal corrosion.

Idle Plant Checks Before Restart

Idle machines need planned checks because seals, drains, dryers, and oil systems can change condition while production is on temporary supply. These actions don’t replace the manufacturer’s procedure, but they reduce the chance that a shutdown creates a second failure during restart.

• Rotate the main drive shaft on oil-free Z units three full rotations once per week during inactivity.
• Run the auxiliary oil pump on centrifugal ZH units once a week for 10 minutes.
• Check dryers and filtration daily during changeover.
• Inspect receiver drains before production restarts.
• Expect seal and gasket leaks after a long idle period.

A Nottingham packaging line with a planned three-day service stop needs the same discipline as an unplanned failure in South Yorkshire. The difference is whether we can do the checks before production is waiting.

What Our Breakdown Response Needs From Site

A useful breakdown response starts with evidence, access, and a clear isolation point. We can move faster when the site provides the failed unit rating, the pressure requirement, the air quality class, and the tie-in route before engineers arrive.

The Fastest Route to Temporary Cover

If the permanent machine can be repaired quickly, temporary supply may only need to cover one critical process. If the air end has failed or a replacement has a long lead time, the hire package should be sized for several weeks of stable production.

• Send a photo of the data plate and controller alarm.
• Confirm whether production is oil-free, lubricated, or breathing-air related.
• Identify the nearest safe hard-standing area for the hired machine.
• Mark the connection route and required air hose length.
• Confirm whether night loading, forklift access, or permits are needed.

Repair or Replacement Evidence

Our engineers carry genuine parts and can move from diagnosis to air compressor repairs when repair is the better answer. If replacement is the right call, the digital catalogue for air compressor sales gives procurement a route to compare permanent options after production is stable.

When Hire is Better Than Repair

Short-term hire is sensible when a planned service stop needs cover, when a replacement has a long delivery window, or when a failed unit risks product loss before parts arrive. It isn’t always the cheapest line item, but it protects output.

Atlas Copco’s rental fleet includes 100% oil-free and electric-driven temporary units (atlascopco.com), which is useful for indoor plants, food sites, and low-emission locations. We still start with the site duty, not the nearest available machine.

FAQs

What Can I Use If I Don’t Have Compressed Air?

If compressed supply is down, the right substitute depends on the process. Some tools can move to electric drives, but pneumatic production lines usually need a hired compressor, receiver, dryer, filters, and hose package sized to the existing duty. For specification detail, start with reading compressor specs.

What Can I Use to Compress Air?

Industrial sites use rotary screw, piston, oil-free, VSD, diesel-driven, or electrically driven machines depending on duty cycle, flow, and quality class. The correct choice depends on FAD, pressure, runtime, drying, filtration, and whether the process can tolerate oil carryover under ISO 8573-1. Don’t compare motor size alone because two machines with similar kW ratings can deliver different usable air.

Can You Compress Air Without Electricity?

Yes, air can be compressed without mains electricity by using diesel-driven equipment, engine-driven portable units, or stored receiver capacity for short-duration tasks. For factory production, diesel temporary supply is the usual option when electrical capacity is unavailable or the failure has taken the compressor room offline.

How to Compress Air Naturally?

Natural compression occurs through pressure changes in the atmosphere or mechanical displacement, but it is not a practical source for industrial production. Manufacturing needs controlled pressure, predictable FAD, dryness, filtration, and safe containment. Natural pressure effects can’t supply pneumatic tools, food packaging lines, or process control reliably.

If your site in Yorkshire or the East Midlands needs temporary cover, call Search Air on 0113 263 9081. We’ll ask for the failed unit rating, required pressure, air quality class, and tie-in details, then size the temporary package before production loses another shift.