Petrol Compressor

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Petrol Compressor

SIP Airmate ISKP7/50 Industrial Super Air Compressor [SIP 04328]

£1,319.99 incl VAT£1,099.99 excl VAT

In Stock

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Petrol Compressor

Airmate ISHP5.5/50 Industrial Air Compressor – Honda Petrol [SIP 04444]

£1,499.99 incl VAT£1,249.99 excl VAT

In Stock

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Petrol Compressor

SIP Airmate Industrial Super ISKP7/150 Compressor – 7hp Kohler Engine

From £1,739.99 incl VATFrom £1,449.99 excl VAT

In Stock

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Petrol Compressor

Airmate ISHP5.5/150 Industrial Air Compressor – Honda Petrol

From £2,159.99 incl VATFrom £1,799.99 excl VAT

In Stock

Select options

This product has multiple variants. The options may be chosen on the product page

Petrol Compressors Explored

Delivering heavy-duty pneumatic power away from traditional mains electricity is the hallmark of professional mobile tyre fitting, agricultural repair, and roadside recovery.

Independent mobile tyre technicians and fast-fit operators require independent, engine-driven systems capable of sustaining high air output in remote locations.

Equipping your commercial vehicle with an industrial petrol unit ensures instant access to high-pressure air wherever the job demands.

You can discover dependable, field-ready power plants across our complete collection of petrol compressors.

These self-contained powerhouses combine proven four-stroke petrol engines with heavy-duty cast iron compressor pumps to guarantee uncompromising field reliability.

Why is an automatic engine speed control unloader valve essential for petrol units

Piston compressors driven by internal combustion engines cannot simply switch off their power source when reaching maximum working pressure.

Instead, a specialised pneumatic unloader valve and automatic engine speed governor work in tandem to manage line pressure safely.

When the receiver tank hits its cut-out threshold, the unloader valve vents pump head pressure and triggers the throttle control mechanism.

This automatically drops the petrol engine down to a smooth idle speed.

Idling significantly cuts fuel consumption, reduces acoustic noise in residential callouts, and prevents severe thermal wear on the cylinder head.

As soon as air tools draw down the tank pressure, the governor instantly revs the engine back up to operating speed to recharge the air supply.

How does internal engine oil level monitoring protect mobile equipment

Mobile tyre fitting vans frequently operate on uneven road cambers, steep gradients, and rugged rural terrain.

Operating a four-stroke petrol engine on an incline causes lubricating oil to pool to one side of the engine crankcase.

Without active protection, the connecting rod dipper or internal oil pump starves the crankshaft journal bearings of lubrication.

This leads to catastrophic bearing seizure within minutes of continuous running.

Commercial-grade petrol engines feature integrated low-oil alert sensors that immediately cut ignition if crankcase fluid levels drop below the safety threshold.

This automatic failsafe protects your capital equipment investment from irreversible mechanical destruction during off-level roadside repairs.

What causes thermal degradation in van-mounted reciprocating pumps

Enclosed commercial van bodies present severe thermodynamic challenges for air-cooled petrol compressors.

A running combustion engine and friction-heavy air pump generate immense radiant heat inside a confined vehicle cargo bay.

When ambient temperatures inside the vehicle rise above 40 degrees Celsius, intake air density drops dramatically.

This forces the compressor pump to run longer duty cycles to displace the required volume of compressed air.

Excessive ambient heat also accelerates the thermal breakdown of lubricating oil, causing piston ring glazing and carbon buildup on stainless steel reed valves.

Providing dedicated floor venting, louvred bulkhead extraction, and directional cooling airflow is vital to maintain pump longevity.

How to Choose the Perfect Petrol Compressor

Selecting the ideal petrol air compressor requires balancing air delivery volume against the payload and physical dimensions of your vehicle.

Underestimating your air volume requirements will leave technicians waiting on the roadside for receiver tanks to recover pressure.

So what should you consider here?

First, determine your required Free Air Delivery (FAD) rather than relying purely on gross piston displacement ratings.

Piston displacement indicates theoretical swept capacity, whereas FAD reflects the actual usable CFM delivered under full working load.

For instance...

Seating stubborn commercial beads or running 1-inch pneumatic impact wrenches on roadside HGV repairs demands a minimum FAD output of 15 to 22 CFM.

Next, evaluate the physical mounting format and receiver tank capacity.

Compact 50-litre tanks mounted on sturdy puncture-proof wheels offer portable flexibility for moving across construction sites.

Larger 150-litre and 200-litre stationary receivers are engineered to be permanently secured to vehicle chassis subframes.

Always factor in the overall wet weight of the machine, including fuel and oil reserves, to avoid exceeding your vehicle Gross Vehicle Weight (GVW) limits.

Variations & Types

Engine Selection Kohler vs Honda Industrial Power Plants

The operational backbone of any petrol compressor is the internal combustion engine driving the belt pulley system.

Honda GX series engines represent the global benchmark for reliability, featuring overhead valve (OHV) layouts, cast iron cylinder liners, and digital CDI ignition systems.

They offer easy starting, exceptional fuel economy, and unmatched global access to genuine replacement service components.

Kohler Command PRO engines provide an equally formidable industrial alternative, engineered with heavy-duty forged crankshafts and dual-element air filtration systems.

These engines are specifically tailored for continuous operation under severe industrial duty cycles.

Both engine configurations deliver high torque output at stable RPM to drive large multi-cylinder cast iron compressor pumps smoothly.

Single-Stage vs Multi-Stage High-Pressure Pumps

Piston pump architecture determines the maximum operating pressure and thermal efficiency of your mobile air plant.

Single-stage twin-cylinder pumps draw atmospheric air and compress it in one continuous stroke up to 145 PSI (10 bar).

These units are lightweight, highly responsive, and well suited for standard passenger car tyre fitting, tubeless inflation, and 1/2-inch impact guns.

Two-stage pumps utilise stepped-diameter cylinders to compress air sequentially through an external finned intercooler pipe.

This progressive compression method achieves operating pressures of 175 PSI (12 bar) with significantly lower discharge temperatures.

Two-stage systems are essential for commercial roadside service where high-pressure bus and agricultural tyres must be inflated rapidly.

Wheel-Mounted Portable Units vs Stationary Base-Mount Systems

The structural layout of the compressor frame dictates how the unit integrates into your daily workflow.

Portable wheel-mounted petrol compressors feature reinforced tubular steel roll-cages, pull handles, and large pneumatic transport wheels.

They allow operators to wheel high-volume pneumatic power directly onto fields, docksides, and quarry worksites.

Stationary base-mounted and tank-mounted units feature rigid heavy-gauge steel mounting feet.

These are engineered for permanent bolted installation directly onto van floors or workshop skids.

Stationary platforms provide a stable, low-profile centre of gravity that prevents vibration transmission into the vehicle chassis during transit.

Specialist Considerations

Air Demand for Mobile Tyre Fitting Tools

Evaluating continuous versus intermittent air consumption prevents air starvation during high-tempo mobile operations.

Different pneumatic tools impose varying load profiles on your petrol air compressor:

• 1/2-inch workshop impact wrenches consume 4 to 7 CFM on rapid intermittent duty.
• Heavy 3/4-inch and 1-inch commercial tyre guns demand 12 to 18 CFM during stubborn wheel nut removal.
• Pneumatic bead-seating air cannons require an instantaneous surge of high-volume air to pop beads onto the rim.
• Continuous air tools like tyre buffers, liquid transfer pumps, and sanders require a constant 10 to 16 CFM output.

Choosing a compressor with an adequate CFM safety margin ensures your engine does not run under full load continuously.

Vibration Dampening and Van Chassis Protection

Reciprocating petrol engines generate significant low-frequency harmonic vibrations that can stress vehicle body panels.

Bolting a petrol compressor directly to a plywood or sheet metal van floor without isolation leads to chassis fatigue and excessive cabin noise.

Heavy-duty elastomeric rubber bobbin dampers or conical vibration isolators must be installed beneath each mounting foot.

These industrial dampers absorb mechanical oscillations, preventing vibrational loosening of internal electrical connections and bodywork rivets.

Furthermore, flexible stainless steel braided discharge hoses should connect the compressor to the vehicle air ring main to prevent rigid pipe fractures.

Exhaust Gas Extraction and Operational Safety Standards

Internal combustion engines produce deadly carbon monoxide gas that must never be permitted to accumulate inside an enclosed workspace.

When operating a petrol compressor mounted inside a van, a sealed flexible exhaust extraction conduit must route all fumes safely outside the vehicle body.

Heat-shielded flexible stainless steel ducting prevents radiant exhaust heat from scorching vehicle wiring harnesses or nearby rubber hoses.

Air receiver tanks must strictly comply with current Pressure Equipment Directive (PED) and UKCA/CE safety certification standards.

Every certified receiver includes an independent, spring-loaded safety pressure relief valve to eliminate any risk of over-pressurisation.

Quality & Brand Selection

Investing in industry-proven machinery ensures your mobile operations remain profitable without the disruption of unexpected breakdown costs.

World-class engineering brands such as SIP and Airmate lead the mobile tyre fitting sector with their purpose-built petrol compressor ranges.

Their systems feature precision-machined cast iron cylinder barrels, balanced flywheels, and heavy-duty Swedish stainless steel reed valves.

Pairing these robust pumps with world-renowned Honda and Kohler power units guarantees long service life, instant parts availability, and maximum resale value.

Explore our complete lineup of high-performance workshop tools and equipment in our petrol compressors collection to elevate your mobile fitting capabilities today.