NMX‑CAS‑48 / Rev 01 / ISO 8573-1 · Class 1.5.1 · IS 2825 / Noida · India 2026 · Product Page

NMX-CAS-48 · SUPPLIED — TWO SYSTEMS · 2023

Dry, oil-free compressed air. Class 1.5.1, certified at the outlet.

Name: Dry & Oil-Free Compressed Air System — ISO 8573-1 Class 1.5.1
Brand: Neometrix

An integrated package that ends the argument about air quality: an oil-free scroll compressor with built-in refrigerated dryer, a 1000-litre stainless steel receiver, and a three-stage filter bank stepping down to 0.01 µm — delivering ISO 8573-1:2010 Class 1.5.1 air, dew point ≤5 °C, oil below 0.01 mg/m³, proven by impurity test certificates rather than brochure claims. Two systems supplied against Government e-Marketplace contracts for a Government of India advanced-research centre — the second ordered four months after the first.

Enquire — compressed air systems Capability sheet (PDF)

Dry and oil-free compressed air system — oil-free scroll compressor in a grey acoustic enclosure, vertical 1000 litre stainless steel air receiver with safety valve and gauge, and a filter bank on a stainless stand, connected by 25 mm piping

Fig · 01 The complete train — compressor, receiver, filter bank — representative of the systems supplied

Outlet Air Quality

1.5.1ISO 8573-1:2010

Free Air Delivery

≥48cfm @ 8 bar · 100% duty

Pressure Dew Point

≤5°C at pressure

Air Receiver

1000L · SS304 · IS 2825

Residual Oil

0.01mg/m³ max · at outlet

ISO 9001 / 14001 Supplied — two systems · 2023 GeM — Government e-Marketplace IS 2825 hydro-certified receiver Noida · India

Overview

Oil-free by architecture, dry by measurement.

A research facility cannot afford compressed air that carries oil aerosol into optics, moisture into pneumatics, or particles into clean volumes. The cure is not a better filter alone — it is a train engineered end-to-end for the air-quality class, then tested against it.

Three-stage compressed air filter bank on a stainless steel stand — filter-regulator with pressure gauge followed by fine filter housings with differential pressure indicators and an outlet ball valve

Fig · 02 The filter bank — grade-stepped filtration to 0.01 µm ahead of the user point (representative arrangement)

The package is one integrated system: an oil-free scroll compressor whose compression chamber never sees lubricant, with a refrigerated dryer built into the same acoustic enclosure; a 1000-litre vertical SS304 receiver, argon-TIG welded and hydro-tested to IS 2825-1969 Class III; and a filter bank that steps the air through 1 µm, 0.1 µm and 0.01 µm elements before it reaches the outlet valve.

The number that matters is measured where the user connects: ISO 8573-1:2010 Class 1.5.1 — particle counts held to class 1, pressure dew point at ≤5 °C (tighter than the 7 °C the class itself permits), and total oil below 0.01 mg/m³. One research establishment bought this system in 2023 — and ordered a second, identical one four months later.

Air quality is certified at the outlet terminal before dispatch — at site, the train is qualified for pressure, flow and power.

Supplied · GeM

Two systems, four months apart

A Government of India advanced-research centre contracted this system through the Government e-Marketplace in 2023, then placed a second contract for an identical system within four months — each with site installation and commissioning in scope.

Certified · IS 2825

A receiver with a paper trail

The 1000-litre SS304 receiver is fabricated to IS 2825-1969 Class III, hydro-tested at ≥18 kg/cm² with certificate, backed by IS 6911 material certs — and the buyer holds the right to repeat the hydro test on receipt.

Measured · ISO 8573-1

Air quality proven, not claimed

Impurity test certificates against Class 1.5.1 are submitted before dispatch clearance; at site, the train is leak-inspected and qualified for pressure, delivered flow and power consumption as part of commissioning.

System Architecture

Compress, dry, store — then filter to class.

The schematic below is the whole train in the order the air travels it — every element the specification demands, from scroll element to the 0.01 µm final stage.

FIG · 03SYSTEM SCHEMATIC · AIR TRAIN · FILTRATION

Fig · 03 One train — oil-free scroll compressor with integral dryer, 1000 L receiver, three-stage filter bank, 25 mm interconnects

Arc · 01

The Compressor

An oil-free scroll element — no lubricant anywhere in the compression chamber — delivering ≥48 cfm FAD at 8 bar at 100% duty cycle, with a refrigerated dryer integrated in the same floor-standing acoustic enclosure (≤2.0 × 1.0 × 2.0 m). Dry-type 5 µm suction filter, Indian 3-phase mains, ≤20 kW total draw, <70 dBA at 1 m, IP55 motor.

Arc · 02

The Receiver

Vertical 1000-litre SS304 vessel, wall ≥5 mm, working pressure 8 bar against a design pressure of ≥12 kg/cm², argon-assisted TIG welded to IS 2825-1969 Class III. Fitted with an ASME Section VIII safety valve, 0–20 bar gauge, 1″ BSP inlet and outlet isolation valves, manual drain, legs and lifting lugs — within ø1000 × 2000 mm.

Arc · 03

The Filter Bank

On a dedicated TIG-welded stainless / aluminium-extrusion stand: a 1 µm filter-regulator, 0.1 µm and 0.01 µm filters, and a manual outlet valve — all rated ≥50 scfm at 1″ BSP, all standard catalogue products with consumables available locally, with one spare element per stage supplied in scope.

Arc · 04

The Pipework

Interconnecting pipe of ≥25 mm bore rated ≥10 bar — aluminium, stainless or engineering-polymer catalogue systems compatible with clean-room application — with isolation valves between units. Leak-inspected before and after installation; corrodible components surface-treated.

Holding a compressed-air or air-quality tender? Send it across — clause-by-clause compliance matrix within two working days · [email protected]

Send tender spec

Specifications

Reference specification, as supplied.

The parameters below reflect the systems supplied in 2023. Capacity, pressure, receiver volume, and air-quality class are re-scoped against your specification.

Full specification — expand

Product	Dry & oil-free compressed air system · integrated package — compressor + receiver + filter bank + interconnecting pipework, with installation & commissioning
Outlet Air Quality	ISO 8573-1:2010 Class 1.5.1 at the outlet terminal — particles: <10 /m³ at 1–5 µm, <400 /m³ at 0.5–1 µm, <20,000 /m³ at 0.1–0.5 µm · pressure dew point ≤5 °C (held tighter than the 7 °C the class permits) · total oil (aerosol + liquid + vapour) <0.01 mg/m³
Compressor	Oil-free scroll element · FAD ≥48 cfm at 8 bar at 100% duty cycle · rated delivery ≥8 bar · dry-type suction filter, 5 µm or finer
Dryer	Refrigerated type, integrated within the compressor enclosure · pressure dew point ≤5 °C at ≥8 bar
Electrical & Acoustics	Indian standard 3-phase AC mains · total power ≤20 kW · noise <70 dBA at 1 m · motor ingress protection IP55 or better
Enclosure	Floor-mounted acoustic enclosure · overall ≤2.0 × 1.0 × 2.0 m (L×W×H)
Air Receiver	Vertical · 1000 L · SS304 · wall ≥5 mm · working pressure 8 bar · design ≥12 kg/cm² · hydro test ≥18 kg/cm² · fabrication IS 2825-1969 Class III · argon-assisted TIG welding · matt finish · OD ≤1000 mm · height ≤2000 mm · legs & lifting lugs
Receiver Fittings	ASME Boiler & Pressure Vessel Code Section VIII safety valve · dial gauge 0–20 bar (0.5 bar resolution, ±0.5 bar) · 1″ BSP inlet valve · 1″ BSP outlet valve · manual drain valve for complete water removal
Receiver Certification	Hydro test certificate per IS 2825-1969 · material test certificate per IS 6911-1992 · buyer right to repeat the hydro test after supply
Filter Bank	Dedicated stand, TIG-welded / SS-bolted stainless or aluminium extrusion · 1 µm filter-regulator → 0.1 µm filter → 0.01 µm filter → manual on-off valve · ≥50 scfm (1415 nlpm) · 1″ BSP · standard catalogue products, consumables locally available · one spare element per stage included
Interconnecting Pipework	Bore ≥25 mm · rated ≥10 bar · aluminium / stainless / PU / PA / POM catalogue systems · clean-room compatible · isolation valves between units · 10 m run supplied
Acceptance — Before Dispatch	Class 1.5.1 impurity test certificate at outlet terminal · receiver hydro-test certificate · material test certificate — dispatch only after buyer’s engineers clear the certificates
Acceptance — At Site	Delivery in OEM packaging · leak inspection of pipes, interconnections and fittings before and after installation · powder-coat verification on corrodible components · qualification of pressure, delivered CFM and power consumption during commissioning
Warranty	One year from completion of installation, commissioning & final acceptance at the consignee site
Status	Supplied — two systems against Government e-Marketplace contracts (2023) for a Government of India advanced-research centre · configurable to customer specification

PDF · 1 page

Dry & Oil-Free Compressed Air — Capability Sheet

Tender Response

Send your specification — clause-by-clause compliance matrix

Variants

One architecture, sized to your duty.

Tenders call this a dry and oil-free compressed air system, an oil-free air package, instrument air, or clean utility air. The supplied configuration is one point on an architecture that scales.

Var · 01

The Supplied Configuration

≥48 cfm at 8 bar, 1000-litre SS304 receiver, three-stage filtration, Class 1.5.1 at the outlet — the reference a Government of India research centre ordered twice in 2023.

Var · 02

Capacity & Pressure

Higher free-air deliveries, higher delivery pressures, duplex compressor sets with standby changeover, and larger or multiple receivers — the same train discipline at plant scale.

Var · 03

Drier & Cleaner Still

Desiccant-dryer variants for sub-zero pressure dew points, and filtration chains engineered to other ISO 8573-1 class targets — specified clause-by-clause against the air your process actually needs.

Var · 04

Scope Beyond the Train

Receiver-only supply from our own IS 2825 vessel fabrication, filter-bank skids for existing compressors, site pipework, commissioning & qualification runs, spares and maintenance support.

Applications

Where it serves.

Wherever the process downstream is worth more than the air feeding it.

A · 01National research laboratories — certified instrument air for sensitive experimental facilities

A · 02Cleanrooms & electronics — particle-counted air for assembly, bonding and optics

A · 03Metrology & calibration — dry reference air for gauging, air bearings and CMMs

A · 04Pharma & food utility air — oil-free class air for product-contact processes

A · 05Instrumentation & control air — clean, dry pneumatics for valves and analysers

A · 06Defence production & test facilities — utility air where contamination is a defect

FAQ

Common questions.

Plain-language answers from the engineering team.

Q · 01 What does ISO 8573-1 Class 1.5.1 actually mean?

The three digits grade the three contaminants — particles, water, oil. Class 1 particles means no more than 20,000 particles/m³ at 0.1–0.5 µm, 400 at 0.5–1 µm, and just 10 at 1–5 µm. Class 5 water permits a pressure dew point up to +7 °C — though the supplied systems were specified tighter, at ≤5 °C. Class 1 oil caps total oil — aerosol, liquid and vapour together — at 0.01 mg/m³. Each figure is verified by measurement at the outlet terminal, not inferred from component datasheets.

Q · 02 How is a scroll compressor oil-free?

A scroll element compresses air between two interleaved spirals — one fixed, one orbiting — with no pistons, no valves in the air path, and no lubricant anywhere in the compression chamber. Bearings live outside the air stream. That is different from an oil-injected machine with downstream oil removal, which is only as clean as its last filter change. Here the air never meets oil in the first place — and the filter bank then guards the 0.01 mg/m³ limit as defence in depth.

Q · 03 If the compressor is oil-free, why the three-stage filter bank?

Because the class is judged at the outlet, and the compressor is not the only source of contamination — pipework sheds particles, ambient air carries aerosols in through the intake, and receivers collect condensate. The bank steps the air through a 1 µm filter-regulator, a 0.1 µm and a 0.01 µm element in series, each stage protecting the finer one after it. All stages are standard catalogue products rated ≥50 scfm, so replacement elements are a local purchase — and one spare element per stage is handed over with the system.

Q · 04 What documentation comes with the air receiver?

The vessel is fabricated in SS304 to IS 2825-1969 Class III with argon-assisted TIG welding, hydro-tested at ≥18 kg/cm² against an 8 bar working pressure, and ships with its hydro test certificate, IS 6911-1992 material test certificates, and the calibration certificate of the test gauge. The safety valve is to ASME Section VIII. On the supplied contracts the buyer also held — and could exercise — the right to repeat the hydro test after delivery.

Q · 05 What happens at installation and commissioning?

The system arrives in OEM packaging and is installed and piped at site. Every joint is leak-inspected before and after installation; corrodible components are checked for protective coating; and the train is then qualified against its numbers — delivery pressure, free air delivery, and power consumption; air quality itself is certified against Class 1.5.1 at the outlet terminal before dispatch. Warranty runs for one year from completion of installation, commissioning and final acceptance, not from dispatch.

Q · 06 Can you build to our tender specification exactly?

That is the standard engagement. Both supplied systems were bid on the Government e-Marketplace against a Government buyer’s technical specification with a mandatory clause-by-clause compliance statement — and built to it, through certificate gates the buyer’s engineers cleared before dispatch. Send your specification — capacity, class, receiver, standards, documentation regime — and we return a compliance matrix within two working days; export enquiries are handled the same way.

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Gas, air & cryogenic systems from Neometrix.

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Get a quotation

Send your compressed-air-system
tender specification.

The Projects desk replies within two working days with a clause-by-clause compliance matrix and a budgetary quotation. Write to [email protected] or use the form.

Enquire — air systems Capability sheet (PDF) +91 7777 876 876

ISO 9001 / 14001 SUPPLIED — TWO SYSTEMS · 2023 ISO 8573-1 · CLASS 1.5.1 MADE IN NOIDA · INDIA

Dry, oil-free compressed air. Class 1.5.1, certified at the outlet.

Oil-free by architecture, dry by measurement.

Two systems, four months apart

A receiver with a paper trail

Air quality proven, not claimed

Compress, dry, store — then filter to class.

The Compressor

The Receiver

The Filter Bank

The Pipework

Reference specification, as supplied.

One architecture, sized to your duty.

The Supplied Configuration

Capacity & Pressure

Drier & Cleaner Still

Scope Beyond the Train

Where it serves.

Common questions.

Gas, air & cryogenic systems from Neometrix.

Portable Liquid Nitrogen Containers

Aircraft Tyre Nitrogen Charging Rig

Naval Pressure Reducing Panels

Send your compressed-air-system
tender specification.

Similar Products

Share This Page

Dry, oil-free compressed air. Class 1.5.1, certified at the outlet.

Oil-free by architecture, dry by measurement.

Two systems, four months apart

A receiver with a paper trail

Air quality proven, not claimed

Compress, dry, store — then filter to class.

The Compressor

The Receiver

The Filter Bank

The Pipework

Reference specification, as supplied.

One architecture, sized to your duty.

The Supplied Configuration

Capacity & Pressure

Drier & Cleaner Still

Scope Beyond the Train

Where it serves.

Common questions.

Gas, air & cryogenic systems from Neometrix.

Portable Liquid Nitrogen Containers

Aircraft Tyre Nitrogen Charging Rig

Naval Pressure Reducing Panels

Send your compressed-air-systemtender specification.

Similar Products

Share This Page

Send your compressed-air-system
tender specification.