NMX‑LN2‑450 / Rev 01 / SS 304 · PESO DOCUMENTED / Noida · India 2026 · Product Page

NMX-LN2-450 · SUPPLIED

Portable liquid nitrogen containers. −196 °C, on wheels.

SS 304 cryogenic dewars in 200 and 450 litre capacities — vacuum super-insulated to lose no more than 2% a day, pressure-rated to 24 kg/cm² with calibrated relief, and self-pressurising for continuous liquid or gas withdrawal through a 10 m stainless cryo hose. Supplied against an Indian nuclear-power project contract, with PESO-approved documentation.

Enquire — LN2 containers Capability sheet (PDF)

Polished SS 304 portable liquid nitrogen dewar on a wheeled trolley with valve head, gauges and corrugated cryogenic transfer hose

Fig · 01 SS 304 dewar on its handling trolley — representative configuration of the supplied type

Capacity

450L (also 200 L)

Evaporation Loss

≤2% / day

Working Pressure

24kg/cm²(g)

Transfer Hose

10m · SS 304

Construction

SS304 · double wall

ISO 9001 / 14001 PESO-documented supply Supplied — nuclear power project GeM registered supplier Noida · India

Overview

The coldest liquid on site has to reach the job.

Liquid nitrogen lives in a bulk tank at the edge of the plant — but the work that needs it happens deep inside: a pipe to be freeze-plugged for valve replacement, a component to be shrink-fitted, a sensor to be cooled. A portable dewar is how −196 °C travels those last five hundred metres safely.

Valve head cluster of a stainless cryogenic dewar with fill, withdrawal and vent valves, gauges, and a frosted corrugated transfer hose

Fig · 02 The valve head — fill, withdraw, vent, calibrated relief, and automatic pressure regulation

These are working vessels, not storage jars. The double-wall SS 304 construction with vacuum super insulation holds static evaporation to 2% a day or better, so the nitrogen you filled on Monday is still there for Friday's job. A pressure-building circuit with automatic regulation self-pressurises the vessel to deliver continuous liquid or gas flow at a set pressure — up to a working pressure of 24 kg/cm²(g), guarded by a calibrated relief valve.

Everything the user touches is engineered for plant work: pressure and float-level instrumentation on the head, fill / withdrawal / vent valves, a wheeled trolley for easy movement across plant floors, and a 10 m SS 304 corrugated flexible cryogenic hose with standard NPT fittings to reach the work point — the configuration specified for in-situ ice-plugging at a nuclear power project.

Fill at the bulk tank, wheel to the work front, and hold pressure until the job is done.

Supplied · Nuclear Grade

An Indian nuclear-power project contract

200 L and 450 L containers supplied for in-situ ice-plugging duty at a nuclear power project — procurement, documentation, and inspection to the utility's standard.

Documented · PESO

Papers a pressure vessel deserves

PESO letter with approved drawing, general-arrangement drawing, quality test certificates, safety-valve calibration certificates, and O&M manual — delivered with every container.

Engineered · To Work

Self-pressurising withdrawal

Automatic pressure regulation holds the set delivery pressure as the job draws liquid or gas — no manual chasing of the gauge, no interrupted freeze.

Construction

Two walls, a vacuum, and discipline.

A dewar is only as good as its insulation and its valve head. The section below is the whole product: an SS 304 inner vessel floating in vacuum super insulation, crowned by the instrumentation that makes it a plant tool.

FIG · 03DEWAR SECTION · VALVE HEAD · WITHDRAWAL

Fig · 03 Double-wall SS 304 · ≤2%/day evaporation · continuous withdrawal at set pressure

Con · 01

Vessel & Insulation

Double-wall SS 304 construction with efficient vacuum super insulation — static evaporation loss held to 2% per day or better, so stored nitrogen survives the working week.

Con · 02

Pressure System

Working pressure up to 24 kg/cm²(g) with automatic pressure regulator and calibrated safety relief valve — pressure-building circuit for self-pressurised delivery.

Con · 03

Instrumentation

Pressure gauge and float-type level indicator mounted on the vessel head, with fill, withdrawal, and venting valves — the state of the dewar readable at a glance.

Con · 04

Handling & Transfer

Wheeled trolley for convenient movement across plant floors, and a 10 m × ½″ SS 304 corrugated flexible cryogenic hose with ⅜″ NPT standard fittings for transfer and withdrawal at the work point.

Holding a cryogenic container or LN2 logistics tender? Send it across — clause-by-clause compliance matrix within two working days · [email protected]

Send tender spec

Specifications

Reference configuration, as supplied.

The parameters below reflect the containers supplied against the nuclear-power project tender. Capacity, pressure rating, and fittings are re-scoped against your specification.

Full specification — expand

Product	Portable liquid nitrogen container (cryogenic dewar) · SS 304 · trolley mounted
Capacities Supplied	200 ± 10 L and 450 L (net capacities) · others engineered to order
Insulation	Vacuum super insulation, double-wall · static evaporation loss ≤2% per day
Working Pressure	Up to 24 ± 1 kg/cm²(g) · automatic pressure regulator · calibrated safety relief valve
Withdrawal	Continuous liquid or gas delivery at set pressure · pressure-building self-pressurisation
Instrumentation	Pressure gauge · float-type level indicator · fill / withdrawal / vent valves on the vessel head
Transfer Hose	SS 304 corrugated flexible cryogenic hose · 10 m × ½″ · ⅜″ NPT standard end fittings · one per container
Handling	Wheeled trolley for convenient movement across plant floors
Documentation	PESO letter & approved drawing · GA drawing · quality test certificates · safety-valve calibration certificates · O&M manual · warranty certificate
Packing	Supplied in original manufacturing packing
Status	Supplied against an Indian nuclear-power project contract (2024) · configurable to customer tender specification

PDF · 1 page

LN2 Containers — Capability Sheet

Tender Response

Send your specification — clause-by-clause compliance matrix

Variants

One vessel family, many tender names.

Tenders call these dewars, cryocans, portable cryogenic containers, LN2 flasks, or self-pressurising liquid nitrogen vessels. The same engineering answers all of them — sized and fitted to the clauses of your specification.

Var · 01

Capacities to Order

The supplied family spans 200–450 L; smaller laboratory vessels and larger transportable capacities are engineered against your duty and handling constraints.

Var · 02

Ice-Plugging Kits

Engineered as complete freeze-sealing packages — dewar, transfer hose, pipe-freezing jackets, and procedure support — for valve replacement on live lines without draining the system.

Var · 03

Other Cryogens

The vessel and valve-head architecture extends to liquid oxygen and argon service — materials, cleaning discipline, and documentation matched to the gas.

Var · 04

Manifolded Banks

Multiple dewars manifolded for higher continuous gas flow — with changeover regulation, engineered with the same discipline as our gas-distribution systems.

Applications

Where it serves.

Anywhere −196 °C has to arrive on wheels and hold pressure while it works.

A · 01Nuclear and process plants — in-situ ice-plugging for valve and pipework maintenance

A · 02Defence laboratories and test establishments — cryogenic cooling at the bench

A · 03EO/IR sensor and detector servicing — clean LN2 where the equipment lives

A · 04Metallurgy — shrink fitting and cryogenic treatment of components

A · 05Medical, veterinary, and biobank logistics — controlled LN2 distribution

A · 06Industrial gas distribution — the last half-kilometre from bulk tank to work front

FAQ

Common questions.

Plain-language answers from the engineering team.

Q · 01 What is ice-plugging, and why a dewar for it?

Ice-plugging (freeze sealing) forms a solid plug inside a live pipe by chilling a short section with liquid nitrogen — so a valve downstream can be replaced without draining the whole system. The job may run for hours and the freeze must never let go, which is why it demands a vessel that holds set pressure automatically and delivers continuously: exactly what the pressure-building circuit and 10 m cryo hose on this dewar are for.

Q · 02 How long does the nitrogen last in storage?

Static evaporation loss is held to 2% per day or better by the vacuum super insulation — so a filled 450 L vessel still holds roughly nine-tenths of its charge after a five-day week, parked and untouched. Actual endurance in service depends on how much the job draws.

Q · 03 Gas withdrawal or liquid withdrawal?

Both. The pressure-building circuit self-pressurises the vessel and the automatic regulator holds your set delivery pressure — draw liquid for freezing and cooling jobs, or continuous gas where the application wants vapour. The float gauge and pressure gauge on the head show what remains.

Q · 04 What documentation comes with each container?

The package specified by the nuclear-power buyer: PESO letter with approved drawing, general-arrangement drawing, quality test certificates, safety-valve calibration certificates, operation & maintenance manual, and warranty certificate — the paper trail a pressure vessel carrying cryogen deserves.

Q · 05 Why SS 304 rather than aluminium?

Stainless 304 keeps its toughness at −196 °C, shrugs off plant handling that dents lighter vessels, welds and inspects cleanly for pressure duty, and tolerates the decades of fill-and-wheel cycles an industrial dewar actually lives through. For plant and defence service, the weight penalty buys durability.

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

That is the standard engagement — the supplied containers were built clause-by-clause against a nuclear utility's tender. Send yours — capacity, pressure, fittings, documentation regime — and we return a compliance matrix within two working days; export enquiries are handled the same way with formalities managed as part of the programme.

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Cryogenic & gas systems from Neometrix.

Storage, dispensing, and charging equipment engineered and manufactured at our Noida facility.

↗ Cryogenic LOX

Get a quotation

Send your cryogenic-container
tender specification.

The Defence Programmes 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 — LN2 containers Capability sheet (PDF) +91 7777 876 876

ISO 9001 / 14001 SUPPLIED — NUCLEAR POWER PROJECT PESO-DOCUMENTED MADE IN NOIDA · INDIA