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K25/21 Classic Industrial Series 3 Phase Reciprocating

Part of the Three Phase series, the K25/21 Industrial Classic Industrial Series 3 Phase Reciprocating air compressor is Australian built with Pilot Air’s seal of quality. Ideal for workshops and factories, it features an energy efficient MEPS approved electric motor to minimise energy costs

“K” series pump
150L receiver
454L/min free air delivery
4kW motor

Product Manual Brochure

Specifications

Model	Piston Displacement		Free Air Delivery		Motor Size		Max. Pressure		Cylinders	Receiver Size	Dimensions	Weight
L/Min		CFM	L/Min	CFM	KW	HP	KPA	(PSI)	(Stages)	Litres	L x W x H (mm)	kg
K17T	428	15.1	292.6	10.3	2.2	3	1000	145	2(1)	100	1060 x 400x 860	100
K25L18	497	17.6	365	12.9	3	4	1100	160	2(2)	100	1060 x 450x 900	130
K25/21	581	20.5	454	16	4	5.5	1100	160	2(2)	150	1320 x 480x 950	170
K30	871.8	30.8	681	24.1	5.5	7.5	1100	160	2(2)	200	1410 x 580x 1050	190
K50	1120	39.6	888	31.1	7.5	10	1100	160	2(2)	268	1540 x 560x 1160	220
K60	1698	60	1353	47.8	11	15	1100	160	4(2)	500	1890 x 680x 1400	420
K100	2311.4	81.6	1913	67.6	15	20	1100	160	4(2)	500	1890 x 700x 1560	480

Performance Measured to AS4637
Technical data conforms to +/- 5%. Pilot Air reserves the right to modification without notice for design and technical improvements.
Warranty: 5 Years on compressor pump, 5 Years on build, 1 Year on all other components.
For over 40 years Pilot Air Compressors has been meeting the needs of industry. Ask us about your requirements.

The K25/21 Classic Industrial Series 3 Phase Reciprocating air compressor is built with high performance and heavy-duty componentry, twin cast iron cylinder and Italian made pump to ensure reliability and longevity. Suitable for workplace use with an air receiver to AS1210, these systems come with a five-year compressor pump warranty. Custom built compressors available to meet your exact requirements.

The K series pump features include:

Low vibration
Low speed
From 2 to 20 HP
Max 11 BAR

Air Compressor Products

From air compressors through to compressed air storage, treatment and distribution, our extensive range of compressed air products ensures we have the right solution for your business needs, no matter the industry or application. We also offer custom-built packages and compressed air systems that are fit for purpose and tailored to your budget.

Frequently Asked Questions

What are the performance specs (air delivery, motor size, pressure) of the K25/21 so I can assess if it’s right for my workshop or factory?

According to the K25/21 product page, this model delivers 454 L/min of free air (≈ 16 CFM), is powered by a 4 kW 3-phase motor, has a maximum working pressure of 1100 kPa (≈ 160 psi), and includes a 150 L receiver.

How is the K25/21 built to withstand harsh Australian conditions like high heat, continuous operation, and demanding workloads?

The K25/21 Classic Industrial compressor uses heavy-duty “K” series pump components, twin cast-iron cylinders, and an Italian-made pump for durability. It is engineered with low speed and low vibration to reduce wear and operate reliably under continuous or rigorous workloads in Australian workshops and factories.

What warranty and build guarantees come with this model, especially for customers in Sydney and across NSW?

Pilot Air provides the K25/21 model with 5 years warranty on the compressor pump, 5 years on the build, and 1 year on all other components, supported by local serviced parts and service centers in Silverwater and Auburn (Sydney).

What size, weight, and installation considerations should I take into account for the K25/21?

The technical specifications list dimensions of 1320 × 480 × 950 mm, weight ~170 kg, and a 150 L receiver. You’ll need a stable, level installation space, adequate ventilation, and a suitable 3-phase power connection.

How energy efficient is the K25/21, and how does it help lower operating costs?

The K25/21 Classic Industrial Series is built with a MEPS-approved electric motor and uses the “K” series pump with design features (low speed, twin cast iron cylinders) that help reduce vibration, heat, and energy loss—leading to lower energy bills and reduced maintenance over its lifetime.

Pilot Air Reviews

We have a growing manufacturing business and our air supply needed to be upgraded to deliver to a clean volume of air to specific machines and mainly our spray booth. 3 Months ago the team at Pilot Air evaluated our requirement and delivered an excellent solution, we have had time to run the system for a considerable time and found it to be excellent. Also Australian Manufactured to boot. Very Happy.

Brett

My husband recently bought a second hand Trademaster 12 air compressor in need of some maintenance. He took it to the Silverwater servicing centre with no prior arrangement. The staff were polite, obliging, and eager to help, and he was impressed with the service provided. Well done Pilot Air!

Donna Slater

I would just like to thank Debbie and the team at Pilot Air Compressors Service Department for a great job done this morning.
Excellent job done, Great Staff & Great Service
Thank you Debbie & the team at Pilot Air Compressors…
Geoff Bryce
Bryce Pest Control Pty Ltd.

Geoff Bryce

Thanks Pilot Air! We have just purchased our third pilot compressor (K50). Our oldest one (K25) is 14 years old and still going strong, used all day every day only replaced pressure switch.

Michael Mourad

The Compressed Air Experts

1300 667 579

NSW
Head Office & Manufacturing
115 Beaconsfield Street,
Silverwater, Sydney NSW 2128

Service and Spares Division
21-25 Stubbs Street,
Auburn, Sydney NSW 2144

Contact Pilot Air

Get in touch to see how we can help you find the right compressed air solution.

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