Oxygen Generators

If you operate within the realm of hyperbaric therapy, aquaculture, and the production of ozone and biogas, leveraging on-site oxygen generators proves invaluable for securing top-tier pressurized gas. Opting to generate your oxygen on-site, rather than relying on external suppliers, offers a multitude of advantages.


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Discover membrane technology for your operations and save costs!

 Beyond ensuring absolute control over the oxygen's quality, you also eradicate the complexities associated with logistical deliveries. The cost savings derived from producing your oxygen in-house typically surpass the initial investment outlay. Elevate your operational efficiency and cost-effectiveness by taking charge of your oxygen supply through on-site generation.

What is a Pneumatech oxygen generator?

Operating with compressed air, this device employs zeolite to effectively separate gases. Zeolite acts by adsorbing and isolating nitrogen, leaving behind only the oxygen. This mechanism enables oxygen generators to achieve purity levels of up to 95%. Remarkably, machines from Pneumatech, for instance, are deployed in highly sterile settings like veterinary clinics and various medical facilities.

Talk to our team today about oxygen generators Talk to our team today about oxygen generators

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Shop online for quality air compressors, fittings, air tools, air regulators, pressure switches, and maintenance kits for NZ businesses and DIYers. Hassle-free, secure payment with Afterpay, nationwide delivery.

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Air Compressors & Treatment

From powerful rotary screw compressors to reliable piston air compressors, we offer a comprehensive range. Explore top-quality air compressors and treatment solutions in New Zealand with Alup and Chicago Pneumatic. Enhance your compressed air system with our refrigerated and desiccant air dryers. Trust us for sales and service of premium air compressors in NZ.

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Vacuum Pumps & Blowers

The team at Ash Air has an extensive range of top quality vacuum pumps and equipment, including rotary vane pumps, liquid ring pumps, claw pumps and screw pumps that are low maintenance, energy-efficient, reliable, affordable and hard working.

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Nitrogen & Oxygen Gas Generators

Our nitrogen gas generators offer excellent all-in-one solutions, with technologically-advanced systems, are very convenient, space saving and easy to install. Our nitrogen generators have impressive control and monitoring capabilities with very reliable purity settings and long-lasting membrane technology.

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2.5HP 50L Oil-Free Dental Air Compressor Clean Air Class Zero Certified

2.5HP 50L Oil-Free Dental Air Compressor Clean Air Class Zero Certified

$3,700.00 NZD exc.
$4,255.00 NZD inc.

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1.5HP 25L Oil-Free Dental Air Compressor Clean Air Class Zero Certified

1.5HP 25L Oil-Free Dental Air Compressor Clean Air Class Zero Certified

$2,450.00 NZD exc.
$2,817.50 NZD inc.

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6.5HP 50L Cast Iron Petrol Air Compressor SF302 KOHLER

6.5HP 50L Cast Iron Petrol Air Compressor SF302 KOHLER

$1,950.00 NZD exc.
$2,242.50 NZD inc.

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3HP 100L Belt Drive Cast Iron Piston Air Compressor SF302HD

3HP 100L Belt Drive Cast Iron Piston Air Compressor SF302HD

$1,900.00 NZD exc.
$2,185.00 NZD inc.

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3HP 50L Belt Drive Cast Iron Piston Air Compressor SF302HD

3HP 50L Belt Drive Cast Iron Piston Air Compressor SF302HD

$1,750.00 NZD exc.
$2,012.50 NZD inc.

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3HP 100L Belt Drive Cast Iron Piston Air Compressor 'Ironman' CPBC-3100

3HP 100L Belt Drive Cast Iron Piston Air Compressor 'Ironman' CPBC-3100

$1,434.90 NZD exc.
$1,650.14 NZD inc.

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5.5HP 30L Twin Tank Petrol Air Compressor (12.4 cfm, 10 bar) CPBA-55E

5.5HP 30L Twin Tank Petrol Air Compressor (12.4 cfm, 10 bar) CPBA-55E

$1,433.90 NZD exc.
$1,648.99 NZD inc.

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3HP 100L Belt Drive Piston Air Compressor CPBA-3100

3HP 100L Belt Drive Piston Air Compressor CPBA-3100

From $1,306.90 NZD exc.
$1,502.94 NZD inc.

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CP7769 Heavy Duty 3/4" Impact Wrench, Max Torque 1950 Nm

CP7769 Heavy Duty 3/4" Impact Wrench, Max Torque 1950 Nm

$1,095.00 NZD exc.
$1,259.25 NZD inc.

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3HP 50L Belt Drive Piston Air Compressor CPBA-350

3HP 50L Belt Drive Piston Air Compressor CPBA-350

From $1,019.90 NZD exc.
$1,172.89 NZD inc.

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2.5HP 50L Belt Drive Cast Iron Piston Air Compressor 'Ironman' CPBC-2550

2.5HP 50L Belt Drive Cast Iron Piston Air Compressor 'Ironman' CPBC-2550

$968.90 NZD exc.
$1,114.24 NZD inc.

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CP7763 3/4" Super Duty Impact Wrench, Max Torque 1,630 Nm

CP7763 3/4" Super Duty Impact Wrench, Max Torque 1,630 Nm

$948.27 NZD exc.
$1,090.51 NZD inc.

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2.5HP 50L Belt Drive Piston Air Compressor CPBA-2550

2.5HP 50L Belt Drive Piston Air Compressor CPBA-2550

From $896.90 NZD exc.
$1,031.44 NZD inc.

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CP7762 3/4" Stubby Impact Wrench, Max Torque 1420 Nm

CP7762 3/4" Stubby Impact Wrench, Max Torque 1420 Nm

$820.87 NZD exc.
$944.00 NZD inc.

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1.5HP 50L Oil-Free Air Compressor with Filter Regulator (5 CFM)

1.5HP 50L Oil-Free Air Compressor with Filter Regulator (5 CFM)

$745.00 NZD exc.
$856.75 NZD inc.

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CP7737 1/2" Angle Impact Wrench, Max Torque 300 Nm

CP7737 1/2" Angle Impact Wrench, Max Torque 300 Nm

$500.00 NZD exc.
$575.00 NZD inc.

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CP9120CR 4" Air Angle Grinder

CP9120CR 4" Air Angle Grinder

$481.80 NZD exc.
$554.07 NZD inc.

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CP9780 3/4" Heavy Duty Belt Sander

CP9780 3/4" Heavy Duty Belt Sander

$438.00 NZD exc.
$503.70 NZD inc.

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2.5HP 24L Direct Drive Piston Air Compressor CPDA-2524 (9.5 cfm)

2.5HP 24L Direct Drive Piston Air Compressor CPDA-2524 (9.5 cfm)

$435.90 NZD exc.
$501.29 NZD inc.

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Condor Pressure Switch | PN: MDR4/11

Condor Pressure Switch | PN: MDR4/11

$434.48 NZD exc.
$499.65 NZD inc.

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PIT TOOLS LU-9040H 90 Series 18 Gauge Narrow Crown Stapler

PIT TOOLS LU-9040H 90 Series 18 Gauge Narrow Crown Stapler

$414.03 NZD exc.
$476.13 NZD inc.

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2.5HP 50L Direct Drive Piston Air Compressor CPDA-2550

2.5HP 50L Direct Drive Piston Air Compressor CPDA-2550

$397.90 NZD exc.
$457.59 NZD inc.

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CP9789 1/2" Heavy Duty Reversible Drill

CP9789 1/2" Heavy Duty Reversible Drill

$395.30 NZD exc.
$454.59 NZD inc.

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PIT TOOLS LU-50F Combination Brad Nailer - Narrow Crown Stapler

PIT TOOLS LU-50F Combination Brad Nailer - Narrow Crown Stapler

$390.80 NZD exc.
$449.42 NZD inc.

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Condor Pressure Switch | PN: MDR3/11 - 10

Condor Pressure Switch | PN: MDR3/11 - 10

$389.00 NZD exc.
$447.35 NZD inc.

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CP7732C 1/2" Ultra Compact Impact Wrench, Max Torque 625 Nm

CP7732C 1/2" Ultra Compact Impact Wrench, Max Torque 625 Nm

$383.25 NZD exc.
$440.74 NZD inc.

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CP7829H 1/2" Air Ratchet Wrench

CP7829H 1/2" Air Ratchet Wrench

$377.78 NZD exc.
$434.45 NZD inc.

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CP7225E Random Orbital Finishing Sander 3/32 Orbit- 6" Pad

CP7225E Random Orbital Finishing Sander 3/32 Orbit- 6" Pad

$328.50 NZD exc.
$377.77 NZD inc.

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1.5HP 6L Oil-free Piston Air Compressor CPRB 6

1.5HP 6L Oil-free Piston Air Compressor CPRB 6

$322.90 NZD exc.
$371.34 NZD inc.

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CP9427 3/8" Heavy Duty Mini Ratchet

CP9427 3/8" Heavy Duty Mini Ratchet

$284.70 NZD exc.
$327.40 NZD inc.

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CP9882 Compact Air Riveter | 1,000 kg Pulling Load | 3/16" Capacity

CP9882 Compact Air Riveter | 1,000 kg Pulling Load | 3/16" Capacity

$262.80 NZD exc.
$302.22 NZD inc.

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PVC Retractable Air Compressor Hose Reel 3/8" x 15 Metre | PN: AR-400

PVC Retractable Air Compressor Hose Reel 3/8" x 15 Metre | PN: AR-400

$254.89 NZD exc.
$293.12 NZD inc.

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PIT TOOLS LU-9032 90 Series 18 Gauge Narrow Crown Stapler

PIT TOOLS LU-9032 90 Series 18 Gauge Narrow Crown Stapler

$241.52 NZD exc.
$277.75 NZD inc.

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Saginamiya Pressure Switch Plus Nipple | PN: SP61-B

Saginamiya Pressure Switch Plus Nipple | PN: SP61-B

$190.86 NZD exc.
$219.49 NZD inc.

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PIT TOOLS LU-9725 97 Series Stapler

PIT TOOLS LU-9725 97 Series Stapler

$184.02 NZD exc.
$211.62 NZD inc.

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PIT TOOLS LU-9025 90 Series 18 Gauge Narrow Crown Stapler

PIT TOOLS LU-9025 90 Series 18 Gauge Narrow Crown Stapler

$183.27 NZD exc.
$210.76 NZD inc.

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PIT Tools Deluxe Medium-Duty Gravity Spray Gun | PN: FR107

PIT Tools Deluxe Medium-Duty Gravity Spray Gun | PN: FR107

$175.20 NZD exc.
$201.48 NZD inc.

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CP886H 1/2" Standard Duty Air Ratchet

CP886H 1/2" Standard Duty Air Ratchet

$173.00 NZD exc.
$198.95 NZD inc.

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SMC Filter Regulator Blister Pack 1/2 BSP | PN: AW40-04BG-B-POS

SMC Filter Regulator Blister Pack 1/2 BSP | PN: AW40-04BG-B-POS

$170.00 NZD exc.
$195.50 NZD inc.

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EMAX AT-7009 Belt Sander 10X330mm

EMAX AT-7009 Belt Sander 10X330mm

$169.18 NZD exc.
$194.56 NZD inc.

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PIT TOOLS LU-8016AC.1 80 Series Fine Wire Stapler

PIT TOOLS LU-8016AC.1 80 Series Fine Wire Stapler

$161.01 NZD exc.
$185.16 NZD inc.

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CP7111 Air Hammer 0.401 Shank

CP7111 Air Hammer 0.401 Shank

From $156.59 NZD exc.
$180.08 NZD inc.

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CP872 1/4" Die Grinder

CP872 1/4" Die Grinder

$153.30 NZD exc.
$176.29 NZD inc.

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EMAX 3/8" Air Drill Gun Heavy Duty | PN: KL-304

EMAX 3/8" Air Drill Gun Heavy Duty | PN: KL-304

$153.30 NZD exc.
$176.29 NZD inc.

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PIT TOOLS LNF-32 18 Gauge Brad Nailer

PIT TOOLS LNF-32 18 Gauge Brad Nailer

$149.51 NZD exc.
$171.94 NZD inc.

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YD102 - Pit Tools Spray Gun Industrial (Suction Type)

YD102 - Pit Tools Spray Gun Industrial (Suction Type)

$149.51 NZD exc.
$171.94 NZD inc.

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Heavy Duty PVC Air Compressor Hose (10MM, 30 MTR) | H1030

Heavy Duty PVC Air Compressor Hose (10MM, 30 MTR) | H1030

$137.89 NZD exc.
$158.57 NZD inc.

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PIT Tools HBFR804 1/2" BSP Inline Filter Regulator | PN: HBFR804

PIT Tools HBFR804 1/2" BSP Inline Filter Regulator | PN: HBFR804

$133.48 NZD exc.
$153.50 NZD inc.

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1.5mm Gravity Feed Spray Gun | PN: YD-71G

1.5mm Gravity Feed Spray Gun | PN: YD-71G

$131.40 NZD exc.
$151.11 NZD inc.

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SMC Filter Regulator Blister Pack 1/4 BSP | PN: AW30-02-BG-BPOS

SMC Filter Regulator Blister Pack 1/4 BSP | PN: AW30-02-BG-BPOS

$120.00 NZD exc.
$138.00 NZD inc.

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PIT Tools Tyre Inflator W/ Gauge 11kg- 11 bar (160 psi - 1100 KPA) | PN: AA-6005

PIT Tools Tyre Inflator W/ Gauge 11kg- 11 bar (160 psi - 1100 KPA) | PN: AA-6005

$112.63 NZD exc.
$129.52 NZD inc.

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Heavy Duty PVC Air Compressor Hose (10MM, 20 MTR) | PN: H1020

Heavy Duty PVC Air Compressor Hose (10MM, 20 MTR) | PN: H1020

$110.33 NZD exc.
$126.88 NZD inc.

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PIT Tools HBR804 1/2" BSP Inline Regulator | PN: HBR804

PIT Tools HBR804 1/2" BSP Inline Regulator | PN: HBR804

$87.37 NZD exc.
$100.48 NZD inc.

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PIT Tools HBF804 1/2" BSP Inline Pre-Filter | PN: HBF804

PIT Tools HBF804 1/2" BSP Inline Pre-Filter | PN: HBF804

$83.74 NZD exc.
$96.30 NZD inc.

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Filter / Regulator 1/4" Ash Air | PN: AFR-200

Filter / Regulator 1/4" Ash Air | PN: AFR-200

$71.60 NZD exc.
$82.34 NZD inc.

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PIT Tools HBL804 1/2" BSP Inline Lubricator | PN: HBL804

PIT Tools HBL804 1/2" BSP Inline Lubricator | PN: HBL804

$67.96 NZD exc.
$78.15 NZD inc.

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Heavy Duty PVC Air Hose (10MM, 10 MTR) | PN: H1010

Heavy Duty PVC Air Hose (10MM, 10 MTR) | PN: H1010

$66.71 NZD exc.
$76.72 NZD inc.

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Condor Pressure Switch | PN: MDR2/11

Condor Pressure Switch | PN: MDR2/11

$66.40 NZD exc.
$76.36 NZD inc.

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Service Kit | SF302 Piston Air Compressors

Service Kit | SF302 Piston Air Compressors

$61.20 NZD exc.
$70.38 NZD inc.

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Service Kit | Chicago Pneumatic CPBA 2550, 350 & 3100 Piston Compressors

Service Kit | Chicago Pneumatic CPBA 2550, 350 & 3100 Piston Compressors

From $60.26 NZD exc.
$69.30 NZD inc.

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Fitting 1/2 BSP HIGH FLOW FEMALE ARO COUPLER | PN: A117

Fitting 1/2 BSP HIGH FLOW FEMALE ARO COUPLER | PN: A117

$56.29 NZD exc.
$64.73 NZD inc.

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AR-200 REGULATOR ASH AIR 1/4 INCH

AR-200 REGULATOR ASH AIR 1/4 INCH

$55.82 NZD exc.
$64.19 NZD inc.

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Chicago Pneumatic Extended Length Silenced Air Blower Gun | PN: 6158112720

Chicago Pneumatic Extended Length Silenced Air Blower Gun | PN: 6158112720

$54.75 NZD exc.
$62.96 NZD inc.

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Chicago Pneumatic Standard Air Blower Gun | PN: 6158112700

Chicago Pneumatic Standard Air Blower Gun | PN: 6158112700

$54.75 NZD exc.
$62.96 NZD inc.

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Fitting QC-3C 3 WAY BRASS ARO COUPLING | PN: QC-3C

Fitting QC-3C 3 WAY BRASS ARO COUPLING | PN: QC-3C

$54.41 NZD exc.
$62.57 NZD inc.

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Brass Fitting 5/8 EQUAL TEE | PN: 20310

Brass Fitting 5/8 EQUAL TEE | PN: 20310

$53.10 NZD exc.
$61.06 NZD inc.

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Filter In-line 1/4" Ash Air | PN: AF-200

Filter In-line 1/4" Ash Air | PN: AF-200

$49.76 NZD exc.
$57.22 NZD inc.

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EMAX Spiral Hose 1/4" BSP Ends (5X8 MM, 9 MTR) | PN: AA-5809

EMAX Spiral Hose 1/4" BSP Ends (5X8 MM, 9 MTR) | PN: AA-5809

$46.26 NZD exc.
$53.20 NZD inc.

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Fitting QC-2C 2 WAY BRASS ARO COUPLING | PN: QC-2C

Fitting QC-2C 2 WAY BRASS ARO COUPLING | PN: QC-2C

$42.16 NZD exc.
$48.48 NZD inc.

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Brass Fitting 1/2 BSP FEMALE TEE | PN: 370008

Brass Fitting 1/2 BSP FEMALE TEE | PN: 370008

$41.13 NZD exc.
$47.30 NZD inc.

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Service Kit | Chicago Pneumatic CPDA-2524 & CPDA-2550 2.5HP Piston Air Compressors

Service Kit | Chicago Pneumatic CPDA-2524 & CPDA-2550 2.5HP Piston Air Compressors

From $40.53 NZD exc.
$46.61 NZD inc.

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Brass Fitting 1/2 EQUAL TEE | PN: 20308

Brass Fitting 1/2 EQUAL TEE | PN: 20308

$40.30 NZD exc.
$46.34 NZD inc.

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ALTAIR Piston Oil 1 LTR | PN: 6215716300

ALTAIR Piston Oil 1 LTR | PN: 6215716300

$39.78 NZD exc.
$45.75 NZD inc.

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3 in 1 Tyre Inflator 1/4 " | 3 Function Tyre Pressure Gauge | PN: AA-6000A

3 in 1 Tyre Inflator 1/4 " | 3 Function Tyre Pressure Gauge | PN: AA-6000A

$37.23 NZD exc.
$42.81 NZD inc.

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CP7111 Chisel for Air Hammer

CP7111 Chisel for Air Hammer

From $34.38 NZD exc.
$39.54 NZD inc.

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EMAX Spiral Hose 1/4" BSP Ends (5X8 MM, 6 MTR) | PN: AA-5806

EMAX Spiral Hose 1/4" BSP Ends (5X8 MM, 6 MTR) | PN: AA-5806

$32.51 NZD exc.
$37.39 NZD inc.

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Brass Fitting 3/8 BSP FEMALE TEE | PN: 370006

Brass Fitting 3/8 BSP FEMALE TEE | PN: 370006

$28.52 NZD exc.
$32.80 NZD inc.

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Fitting B53 RECTUS BRASS COUPLER | PN: B53

Fitting B53 RECTUS BRASS COUPLER | PN: B53

$28.26 NZD exc.
$32.50 NZD inc.

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Push In Fitting BFC 6 1/8 6MM X 1/8M BSP BANJO FLOW CONTROL | PN: AS2201F-01-06SA

Push In Fitting BFC 6 1/8 6MM X 1/8M BSP BANJO FLOW CONTROL | PN: AS2201F-01-06SA

$27.92 NZD exc.
$32.11 NZD inc.

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PIT Tools Air Blower Duster Gun 30cm | PN: HBB-30

PIT Tools Air Blower Duster Gun 30cm | PN: HBB-30

$26.28 NZD exc.
$30.22 NZD inc.

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Brass Fitting 3/4 HOSE JOINER | PN: 20512

Brass Fitting 3/4 HOSE JOINER | PN: 20512

$25.19 NZD exc.
$28.97 NZD inc.

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EMAX Air Blow Gun Kit | PN: AA-3020K

EMAX Air Blow Gun Kit | PN: AA-3020K

$21.41 NZD exc.
$24.62 NZD inc.

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PIT Tools Air Blower Duster Gun | PN: HBB-12

PIT Tools Air Blower Duster Gun | PN: HBB-12

$21.41 NZD exc.
$24.62 NZD inc.

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Brass Fitting 3/4 - 1/4 REDUCING NIPPLE | PN: 332401204

Brass Fitting 3/4 - 1/4 REDUCING NIPPLE | PN: 332401204

$20.92 NZD exc.
$24.06 NZD inc.

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How does an oxygen generator function?

The predominant machines for oxygen delivery are Pressure Swing Adsorption (PSA) generators. These typically consist of two zeolite adsorption cylinders that pressurize and separate the 78% nitrogen and 21% oxygen found in regular air. In this system, drums are utilized for continuous gas production and energy efficiency. Nitrogen separation is part of the process, often regenerated to maintain optimal air pressure in each drum.

The PPOG HE model enhances efficiency with variable air flow based on demand. To ensure a consistent oxygen supply, a storage tank collects gas for future or peak demand. The entire setup, including the generator, air compressor, dryer, and piping, can be stacked for a compact footprint. Pneumatech's oxygen generators are designed to seamlessly integrate into your existing infrastructure., wherever you are in New Zealand.

The benefits of on-site oxygen generators

Saving time, money, and resources, generating your own oxygen comes with many benefits (compared to third-party deliveries). 

1. Cost efficiency
Producing your own oxygen with the purity you need allows you to significantly reduce gas costs. The cost per unit of O2 is 50-90% lower with Pneumatech's PPOG HE generator, compared to bottled or liquid oxygen.

2. Sustainability
Eliminate transport emissions generated by oxygen deliveries. In addition, Pneumatech's on-site generation solutions are super-efficient, minimizing your energy use and environmental footprint. For example, our PPOG HE generator is 30% more efficient than traditional oxygen generators.

3. A reliable O2 supply
No need to count on external vendors. On-site generation gives you complete control over your oxygen source.

4. No logistics
Say goodbye to monitoring your Ologistics, working with vendors, and facilitating deliveries.