NMX‑BAS‑60 / Rev 00 / breathing air & respiratory protection / compress · purify · store · fill 2026 · Product Page

NMX-BAS-60 · ENGINEERED TO ORDER — COMPRESSOR PACKAGES, PURIFICATION, CASCADE & CERTIFIED APPARATUS

The set is certified. The air supply is engineered. Only one of those is a design job.

Name: Breathing Air Systems & Rescue Sets
Brand: Neometrix

Two different things are bought under one heading, and separating them is the first useful act. A wearable set is a type-certified article tied to a licensed factory — in India its certification is a manufacturer's factory-based licence requiring the licensee's own equipped laboratory, and mining approvals are model-specific, time-limited and renewable only by the manufacturer. A supplier that is not that manufacturer may lawfully procure, supply, install, commission, maintain and test certified sets; what it may not do is self-declare conformity or badge one as its own. The air supply that feeds them is ordinary engineering scope with its own national charging-plant standard — and its central discipline is that breathing air quality is a measured property of the delivered gas, never a consequence of compressor selection. Equipment of this class has been quoted across breathing-air supply, charging plant and respiratory set requirements; no delivered breathing-air installation is claimed — the class is engineered to order.

Enquire — breathing air system Capability sheet (PDF)

Illustrative of the class — a high-pressure breathing-air compressor package running in a plant room: a compact multi-stage reciprocating compressor with a large finned intercooler and belt guard driven by a grey electric motor on a mid-grey fabricated steel skid, four slim vertical stainless purification vessels linked in series by high-pressure tubing with isolation valves and a condensate drain running to a collection vessel, and a plain grey instrument panel with plain-faced pressure gauges and a small live display, with a technician at the panel, one hand on a valve handle, watching the gauges, no readable markings anywhere

Fig · 01 The compressor makes pressure; the four vessels beside it are what make the air breathable

The set

type-certifiedsupplied, never badged

Air quality

a measured gas specnot a compressor choice

Purification

four mandated stagesseparate, dry, adsorb, convert

Plant standard

up to 41.4 MPadelivery from 20 MPa

Status

engineered to orderquoted class

ISO 9001 / 14001 Engineered to order Breathing air & respiratory protection Purification & measurement Noida · India

Overview

A compressor makes pressure. It does not make breathable air.

That distinction is the whole discipline, and it is why the purification train and the measurement regime matter more than the machine that drives them.

Illustrative of the class — a high-pressure cascade storage bank and filling station: twelve tall plain unmarked steel cylinders standing upright in two rows in a heavy mid-grey fabricated steel restraining frame, each connected at the neck by bright stainless high-pressure pigtails to a common manifold along the top, a plain grey fill control panel carrying plain-faced pressure gauges and a row of isolation valves, and a heavy steel containment fill cabinet with its thick hinged door standing open and an empty cylinder cradle inside, with a technician at the fill panel with one hand on a valve, no readable markings anywhere

Fig · 02 Storage and filling sit under the Statutory Authority — not a detail to discover late

Start with the split. A breathing-air procurement usually contains two quite different objects. One is the wearable set, which is a type-certified article. In India that certification is a manufacturer's factory-based licence rather than a paper certificate: the licensee must maintain its own suitably equipped and staffed laboratory with a calibration plan, because no recognised external laboratory holds the test facility, so the complete test programme is executed inside the factory during the certifying visit. For mining apparatus, approval is model-specific, numbered, time-limited and renewable only by the manufacturer; it attaches to a named model, not to whoever supplies it.

What that does and does not mean. It does not mean a supplier who is not the manufacturer is shut out. Procuring, supplying, installing, commissioning, maintaining and testing certified sets is entirely legitimate and entirely routine. What is not legitimate is self-declaring conformity, applying an approval label, or presenting a set as one's own approved product. Neometrix does none of those things and says so on the record — a firm that is vague about this boundary is usually the one to worry about.

The other object is the installation, and that is engineering. India has a national standard for the charging plant itself, covering design, materials, fabrication, inspection and testing of packages that supply high-pressure breathing air and fill cylinders — working pressures up to 41.4 MPa, with delivery designed from 20 MPa upward. Its clause structure reads like a scope of supply: purification and dryers, high-pressure storage approved by the Statutory Authority, a pressure-reducing station and manifold with fine filtration, an instrument panel, inspection and testing, and optional items including a containment fill station and a cascade fill control panel piped for four storage banks.

Equipment of this class has been quoted across breathing-air supply, charging plant and respiratory set requirements. No delivered breathing-air installation is claimed: the class is engineered to order, and the record is stated as it stands.

Boundary

Certified, not badged

Supplied, installed, maintained, tested — never self-declared.

Discipline

A measured gas spec

Four mandated stages — then prove the delivered gas.

Jurisdiction

A foreign mark is not admission

It evidences type-certification — not the right to supply here.

Architecture

Compress, purify, store and reduce, then fill and prove it.

The schematic marks what is engineering scope and what is procured certified — then details where the air is actually made.

FIG · 03BREATHING AIR INSTALLATION · COMPRESSOR PACKAGE / PURIFICATION / STORAGE + REDUCTION / FILL + PROOF

Fig · 03 The detail worth reading twice — the four stages that turn compressed air into breathing air

Arc · 01

Compressor Package

Sized on the demand profile — a rescue callout empties a cascade far faster than a routine refill schedule suggests.

Arc · 02

Purification Train

Where the air is actually made — mechanical separation, desiccant drying, activated carbon, and a catalyst for carbon monoxide.

Arc · 03

Storage, Reduction & Distribution

Under the Statutory Authority — high-pressure storage, reducing station and manifold, fine filtration, instrument panel.

Arc · 04

Fill, Test & Assurance

Containment fill station and cascade panel — plus the measurement that proves the delivered gas meets its specification.

Specifying a breathing-air installation, or replacing one nobody has tested the output of? Send the demand profile, the sets in service, the site and the approvals held or required — a clause-by-clause compliance matrix within two working days · [email protected]

Send tender spec

Specifications

Sized on demand, judged on the gas that comes out.

Compressor duty, purification media, storage volume and bank arrangement, reducing and distribution, fill arrangement and monitoring all follow from four givens: the demand profile including its worst case, the sets in service and their cylinders, the site and its approvals, and the assurance regime the operator must satisfy.

Illustrative of the class — a clean equipment room: a mid-grey fabricated steel rack holding six self-contained breathing sets side by side, each a plain unmarked matte-grey composite cylinder strapped to a moulded backplate with plain webbing harness straps, a short braided hose looping to a small plain regulator, and a clear full-face mask clipped to the frame beside each set rather than worn, with one further set laid flat on a light-grey workbench and a technician checking its harness with both hands, no readable markings anywhere

Fig · 04 Certified sets, supplied and maintained as certified sets — the badge stays the manufacturer's

Where these installations go wrong

Buying a compressor and calling it a breathing-air system. The purification train and the measured gas specification are the system; the compressor is the part that makes pressure. Specifying only a foreign standard — a European or American conformity mark evidences that an OEM type-certified its product, but says nothing about admissibility here, where national apparatus standards and their licensing regime, mining approval and the Statutory Authority govern. Treating storage as a tank, when high-pressure storage and filling sit under that authority and the arrangement has to be designed accordingly. No monitoring on an oil-lubricated machine — carbon monoxide is the failure that gives no warning, which is why dew-point control and a CO alarm belong in the specification rather than the options list. Sizing on cylinder count instead of the demand profile, so the plant copes with routine refilling and not with the callout it exists for. And expecting a supplier to certify a set it did not manufacture, which no supplier can lawfully do.

The corrective discipline is short. Establish the demand profile including its worst case, and size the package and the cascade against that. Specify the purification train explicitly, stage by stage, and treat media life as a maintenance obligation with a defined interval rather than an assumption. Require the delivered gas to be measured, on a stated schedule, against a numeric specification — the only evidence that the installation is doing its job. Design the storage, reducing and filling arrangement around the approvals that actually apply. And keep the boundary around the certified apparatus explicit in the contract, so nobody is later asked to sign something they cannot.

Full specification — expand

System	Breathing-air installation — compressor package, purification train, storage & reduction, fill and assurance; plus supply, installation, commissioning, maintenance and testing of certified apparatus
The Scope Split	The set is certified; the air supply is engineered. Two different objects bought under one heading
Why The Set Differs	Its certification is a manufacturer's factory-based licence requiring the licensee's own equipped and staffed laboratory with a calibration plan — the test programme runs inside the factory. Mining approval is model-specific, numbered, time-limited and renewable only by the manufacturer
What A Supplier May Do	Procure, supply, install, commission, maintain and test certified sets — lawfully and routinely
What A Supplier May Not Do	Self-declare conformity, apply an approval label, or present a set as its own approved product. Neometrix does none of these
The Central Point	Breathing air quality is a numeric property of the delivered gas, verified by measurement — never a consequence of compressor selection
The Four Mandated Stages	Mechanical separation of condensed oil and water droplets; vaporous water absorbed by a desiccant; oil vapour and noxious odours absorbed by activated carbon; carbon monoxide converted to respirable levels of carbon dioxide by catalyst
Oil-Lubricated Machines	Add dew-point control and a carbon monoxide alarm — CO is the failure that does not announce itself
Plant Standard	The Indian breathing air compressor package specification — working pressures up to 41.4 MPa, delivery designed from 20 MPa. Purification and dryers; HP storage approved by the Statutory Authority; pressure-reducing station and manifold with fine filtration; instrument panel; inspection and testing; optional containment fill station and cascade fill control panel piped for four storage banks
Jurisdiction	A foreign conformity mark evidences OEM type-certification, not a right of supply here. The binding instruments are the national apparatus standards and their licensing regime, mining approval, and the Statutory Authority for cylinders and filling
The Apparatus Family	Closed-circuit long-duration sets on compressed oxygen — the mining part, requiring oxygen purity not less than 99% and carbon dioxide in the inhaled air not exceeding 1.25% by volume on average, and never 1.5%, through the working duration. Open-circuit self-contained sets. Compressed-air-line apparatus, constant-flow or demand-valve, and separately scoped for low-temperature use. Escape and short-duration sets
Conformity By Test	Demonstrated largely through instrumented test annexes rather than documentation review — a laboratory test on a lung simulator providing sinusoidal air flows, and a practical test on human wearers under the supervision of a registered medical practitioner, with defined breathing-resistance limits across rates and tidal volumes
The Split	The advanced life support oxygen test bench for pilot safety systems serves aircrew life support on a bench; here the subject is industrial and mine rescue. The HP air bottle test facility addresses the cylinders; this page is the plant that fills and conditions the air inside them. And the KU-7 leak tester is a single-component tester; the analogue here is set-level and installation-level assurance
Scope Boundary	Ours: the installation — compressor package, purification train, storage interface, pressure-reducing station and manifold, instrument panel, containment fill station and cascade panel, distribution, monitoring and alarms, installation, commissioning, documentation, training, spares & AMC — together with procurement, supply, installation, commissioning, maintenance and testing of type-certified apparatus. Bought-in certified: the breathing sets and their cylinders; compressors, purification media and cartridges, instruments, valves and control hardware. The customer's: the duty and demand profile, the site, the approvals held or required, and the acceptance decision. Neometrix does not type-certify, self-declare or badge a wearable breathing set
Status	Engineered to order — equipment of this class quoted across breathing-air supply, charging plant and respiratory set requirements; no delivered breathing-air installation is claimed

PDF · 1 page

Breathing Air Systems & Rescue Sets — Capability Sheet

Tender Response

Send demand profile, sets in service, site & approvals — compliance matrix in two working days

Variants

Four families of apparatus, and one installation behind them.

The national standard separates these into its own parts, and they are genuinely different machines rather than sizes of one.

Var · 01

Closed-Circuit Long Duration

Compressed oxygen, rebreathed — the mining part, with oxygen purity and inhaled carbon dioxide fixed as numeric limits.

Var · 02

Open-Circuit Self-Contained

Compressed air, exhaled to atmosphere — the firefighting and industrial workhorse.

Var · 03

Compressed-Air-Line

Constant-flow or demand-valve — trolley or fixed supply, separately scoped for low-temperature use.

Var · 04

Escape & Short Duration

For getting out, not for working in — a different part of the standard and a different duty.

Applications

Wherever people work in air they cannot breathe.

Mine rescue, process emergency response, offshore, and confined-space work.

A · 01Coal mining rescue

A · 02Refinery & petrochemical response

A · 03Upstream & offshore

A · 04Municipal fire services

A · 05Disaster response

A · 06Confined-space maintenance

FAQ

Common questions.

Plain-language answers from the engineering team.

Q · 01 Does Neometrix manufacture breathing apparatus?

No, and the reason is worth understanding because it shapes every procurement in this field. A wearable breathing set is a type-certified article, and in India that certification takes the form of a manufacturer's factory-based licence rather than a certificate that can be obtained on paper. The licensee has to maintain its own suitably equipped and staffed laboratory with a calibration plan, because no recognised external laboratory holds the necessary test facility — the complete test programme is executed inside the factory during the certifying visit. For mining apparatus the position is tighter still: approval is model-specific, carries its own number, is time-limited with an explicit expiry, and is renewable only by the manufacturer. It attaches to a named apparatus model, not to whoever happens to be supplying it. What that does not mean is that only manufacturers may participate. Procuring, supplying, installing, commissioning, maintaining and testing certified sets is entirely lawful and entirely routine, and it is what Neometrix does. What no supplier may do — and what this firm does not do — is self-declare conformity, apply an approval label, or present a set as its own approved product. A supplier who is vague about that boundary is usually the one to examine closely.

Q · 02 If a good compressor is fitted, is the air breathable?

No. This is the single most common error in a breathing-air specification, and it matters because the consequence is invisible. Breathing air is defined as a numeric property of the delivered gas and is verified by measurement; it is not a property of the machine that compressed it. The Indian charging-plant standard makes the point structurally by mandating four distinct purification mechanisms as a requirement rather than an option: mechanical separation of condensed oil and water droplets; absorption of vaporous water by a desiccant; absorption of oil vapour and elimination of noxious odours by activated carbon; and conversion of carbon monoxide to respirable levels of carbon dioxide by a catalyst. Each addresses a different contaminant with a different mechanism, and none substitutes for another. Where the compressor is oil lubricated, practice adds dew-point control and a carbon monoxide alarm, precisely because carbon monoxide is odourless, colourless and gives the wearer no warning at all. The practical implication for a buyer is that the purification train, its media, its replacement interval and the schedule on which the delivered gas is actually sampled and measured all belong in the specification. A tender that names a compressor and is silent on those has not yet specified a breathing-air system.

Q · 03 A set carries a European or American approval mark — is that sufficient here?

It is useful evidence, but it is not the answer to the question usually being asked. A foreign conformity mark demonstrates that the original manufacturer took its product through that jurisdiction's type-certification regime, and those regimes are genuinely demanding — in Europe respiratory sets of this kind cannot have their conformity self-declared at all, requiring independent type-examination plus a continuing, regularly audited production arrangement, and in the United States an approval label may be used only by the applicant it was issued to. Both facts are worth knowing when assessing a manufacturer. Neither, however, establishes admissibility for supply in India. Here the binding instruments are the national apparatus standards together with their licensing regime, approval for mining use where the apparatus is destined underground, and the Statutory Authority for cylinders and their filling. A specification that cites only a foreign standard has described the pedigree of the product without yet addressing whether it may lawfully be supplied and used in its intended service. In practice the two questions should be asked separately and early, because discovering late that an otherwise excellent set lacks the domestic approval its application requires is expensive and slow to remedy.

Q · 04 How should a charging plant and cascade be sized?

Against the demand profile, including its worst case, rather than against the number of cylinders on site. The two give very different answers. Routine operation refills a predictable handful of sets on a known cycle, and almost any package will cope. The event the installation exists for is the opposite: a callout in which a team goes in, comes out, and needs immediate recharging while a second team is already committed. That draws the cascade down hard and fast, and recovery time then depends on the compressor's actual delivery rate and the bank arrangement rather than on total stored volume. So the useful questions are how many sets must be recharged within what period, how many teams may be committed simultaneously, and how long the plant may acceptably take to restore full readiness. The cascade arrangement follows — a panel piped for multiple storage banks allows the highest-pressure bank to be reserved for topping off while lower banks do the bulk transfer, which materially improves both fill time and compressor duty. Storage and filling also sit under the Statutory Authority, so the arrangement, its location and its protection are constrained by more than hydraulics. Where cylinders are filled routinely, a containment fill station belongs in the scope rather than in the options list.

Q · 05 What is the difference between closed-circuit and open-circuit sets?

They are different machines solving the same problem for very different durations, and the national standard treats them in separate parts. An open-circuit self-contained set carries compressed air, the wearer breathes it, and the exhaled breath is discharged to atmosphere. It is simple, robust and the workhorse of firefighting and industrial use, but everything exhaled is lost, so duration is bounded by cylinder capacity and working rate. A closed-circuit set instead carries compressed oxygen and recycles the wearer's breath: carbon dioxide is scrubbed out and oxygen is replenished, so the same mass of gas supports far longer duration. That is why the long-duration mining sets are closed-circuit. The engineering consequence is that its performance limits become chemical and physiological rather than merely volumetric, and the standard fixes them numerically — oxygen purity of not less than 99 per cent, and carbon dioxide in the inhaled air not exceeding 1.25 per cent by volume on average and never 1.5 per cent, throughout the working duration. Compliance is demonstrated largely by instrumented test rather than by document review: a laboratory test on a lung simulator providing sinusoidal flows, and a practical test on human wearers conducted under the supervision of a registered medical practitioner.

Q · 06 What do you build, what is bought in — and what is claimed?

Divided honestly. What Neometrix provides: the installation — compressor package sized on the demand profile; the purification train, specified stage by stage, with media life treated as a maintenance obligation; the high-pressure storage interface, pressure-reducing station and manifold with fine filtration; the instrument panel; the containment fill station and cascade panel; distribution, monitoring and alarms including dew-point and carbon monoxide where the machine is oil lubricated; and installation, commissioning, documentation, training, spares and AMC — including build to the customer's own specification. It also procures, supplies, installs, commissions, maintains and tests type-certified breathing apparatus. What is bought-in certified: the breathing sets themselves and their cylinders, compressors, purification media and cartridges, instruments, valves and control hardware — integrated rather than imitated. What is the customer's: the duty and demand profile, the site, the approvals held or required, and the acceptance decision. And what is never claimed: Neometrix does not type-certify, self-declare or badge a wearable breathing set, and no representation to the contrary should be inferred from supply. The record, stated plainly: equipment of this class has been quoted across breathing-air supply, charging plant and respiratory set requirements, and no delivered breathing-air installation is claimed. The class is engineered to order.

↗

The bench, the bottle, and the component.

Three neighbours in breathing gas and high-pressure work.

↗ Aircrew

Advanced Life Support Oxygen Test Bench

Aircrew life support on a bench — here the subject is industrial and mine rescue.

↗ The cylinders

HP Air Bottle Test Facility

Tests the bottles; this page is the plant that fills and conditions what is in them.

↗ One component

KU-7 Leak Tester

A single-component tester — the analogue here is set and installation assurance.

Browse all Neometrix product lines.

Get a quotation

Send the demand profile
and the sets it has to serve.

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 — breathing air system Capability sheet (PDF) +91 7777 876 876

ISO 9001 / 14001 ENGINEERED TO ORDER — BREATHING AIR SYSTEMS & RESCUE SETS COMPRESS · PURIFY · STORE AND REDUCE · FILL AND PROVE ENGINEERED IN NOIDA · INDIA

The set is certified. The air supply is engineered. Only one of those is a design job.

A compressor makes pressure. It does not make breathable air.

Certified, not badged

A measured gas spec

A foreign mark is not admission

Compress, purify, store and reduce, then fill and prove it.

Compressor Package

Purification Train

Storage, Reduction & Distribution

Fill, Test & Assurance

Sized on demand, judged on the gas that comes out.

Where these installations go wrong

Four families of apparatus, and one installation behind them.

Closed-Circuit Long Duration

Open-Circuit Self-Contained

Compressed-Air-Line

Escape & Short Duration

Wherever people work in air they cannot breathe.

Common questions.

The bench, the bottle, and the component.

Advanced Life Support Oxygen Test Bench

HP Air Bottle Test Facility

KU-7 Leak Tester

Send the demand profile
and the sets it has to serve.

Similar Products

Share This Page

The set is certified. The air supply is engineered. Only one of those is a design job.

A compressor makes pressure. It does not make breathable air.

Certified, not badged

A measured gas spec

A foreign mark is not admission

Compress, purify, store and reduce, then fill and prove it.

Compressor Package

Purification Train

Storage, Reduction & Distribution

Fill, Test & Assurance

Sized on demand, judged on the gas that comes out.

Where these installations go wrong

Four families of apparatus, and one installation behind them.

Closed-Circuit Long Duration

Open-Circuit Self-Contained

Compressed-Air-Line

Escape & Short Duration

Wherever people work in air they cannot breathe.

Common questions.

The bench, the bottle, and the component.

Advanced Life Support Oxygen Test Bench

HP Air Bottle Test Facility

KU-7 Leak Tester

Send the demand profileand the sets it has to serve.

Similar Products

Share This Page

Send the demand profile
and the sets it has to serve.