Neometrix / Ammunition Test & Proof Equipment / Bomb Shell Hydraulic Pressure Testing Machine / NMX-BSP-40

NMX-BSP-40 · DELIVERED CLASS — HYDRAULIC PROOF TESTING · QUICK-CHANGE TOOLING · AUTOMATED CELLS

If it fails, it should only leak.

Name: Bomb Shell Hydraulic Pressure Testing Machine
Brand: Neometrix

Every shell body leaves its forging and machining line with the same question hanging over it: will it hold pressure? The only honest way to answer is to apply more pressure than it will ever meet in service, hold it, and watch what happens.

The test is hydraulic for one reason — safety. Water is nearly incompressible, so a body filled with it stores almost no energy. A body that fails weeps or splits. Do the same test with gas and a failure stops being a measurement and becomes an event.

Discuss a machine Capability note (PDF)

The complete Neometrix bomb shell hydraulic pressure testing cell photographed against a white background: green infeed and outfeed conveyors, the hydraulic test column with its gauge panel, and the robot that loads and unloads the station

Fig · 01 — The machine as built. Infeed and outfeed conveyors, the hydraulic test column and its gauge panel, and the robot that loads and unloads the station.

The article

an empty bodyforged, machined, unproven

The medium

water, not gasalmost no stored energy

The watch

decay + deformationleak, or yield

The output

a recorded verdicttraceable to the body

Status

delivered classbuilt to order

ISO 9001ISO 14001High-pressure hydraulicsGuarded test enclosuresProduction-rate automation

Overview

Why every body is tested, not sampled.

Because the defects that matter are not evenly distributed.

A Neometrix shell proof-testing line installed on a customer shop floor: blue infeed and outfeed conveyors with orange cradles, the hydraulic test column behind them and a robot serving the station

Fig · 02 — Installed and running. The same machine built into the line it serves — conveyors, test column and robot working as one station.

A sampled batch tells you about a batch. A proof test tells you about the body in your hand — which is the only one that matters next.

What the test is actually looking for

A shell body carries the consequences of everything that made it: the material, the forging, the heat treatment, the machining. Most of those consequences are invisible. A pore, a fold, a thin wall or a missed operation does not announce itself.

Pressure finds them. Taken above its service pressure and held, a sound body does nothing at all — and an unsound one either leaks or yields. Those are the two verdicts, and the machine exists to reach them reliably, on every body, at production rate.

Why water and not air

This is the decision that shapes the whole machine. Water barely compresses, so a body filled with it holds very little stored energy even at high pressure. When such a body fails, the pressure collapses at once: it weeps, or it splits, and nothing is thrown.

The same body pressurised with gas would store a great deal of energy, and its failure would release all of it in an instant. That is why proof testing of pressure-bearing articles is done hydraulically, and why the air is deliberately purged out before the test begins.

Production, not laboratory

Testing one body carefully is straightforward. Testing every body, quickly, with tooling that changes between sizes, results that are recorded against each article, and an enclosure that makes the whole thing routine — that is the machine.

Locatedsquare, in quick-change tooling

Purgedair out before pressure in

Heldset pressure, set time

Recordedverdict tied to the body

The cycle

Eight steps, one verdict.

The sequence runs from a stored recipe, not from an operator's judgement — which is what makes one body's result comparable with another's.

FIG · 02HYDRAULIC SHELL PROOF TEST · LOAD / SEAL / FILL & PURGE / PRESSURISE / HOLD & WATCH / RELEASE / RECORD — AND WHY WATER, NOT GAS

The step people underrate is the purge. Trapped air is compressible: it stores energy that a hydraulic test is supposed to avoid, and it softens the pressure curve enough to hide a slow leak.

1 · Load & locate

The empty body is placed in an adjustable V-block fixture with a location cup, held square so the sealing head meets its mouth cleanly rather than at an angle.

2 · Seal

An interchangeable sealing head closes the mouth against full test pressure. Sealing heads are part of the tooling set, so a change of shell size is a change of parts, not of machine.

3 · Fill & purge

The body is filled and the air driven out. Air left inside is compressible — it stores energy and it hides slow leaks behind a soft pressure curve.

4 · Pressurise & hold

An intensifier raises pressure under closed-loop control to the recipe's test pressure and holds it for the recipe's time — the same way, every time.

5 · Watch

Two measurements decide it: pressure decay over the hold, which means a leak, and permanent deformation resolved to a micron, which means the body has yielded.

6 · Release, record, unload

Pressure is let down under control, the verdict is written against the body's identity and the recipe used, and the body is released — by hand, or by the cell's handling.

Work content

What the machine contains, element by element.

Read it as a checklist: a machine missing a row will buy that row later, at integration prices.

The proof-test station in a production bay: bodies laid along the green conveyor on their cradles, the hydraulic test column with its gauge panel behind, and the robot alongside ready to load

Fig · 03 — In the bay, at rate. Bodies on their cradles along the conveyor, the test column behind — where handling, not pressure, becomes the engineering problem.

Element	What it does	What matters
Machine frame	carries the reaction of a sealed, pressurised body	stiffness and fatigue life
V-block fixture & location cup	holds the body square	adjustable across the size family
Sealing head	closes the mouth at full pressure	interchangeable; seal life
Fill & purge circuit	fills the body and removes air	the step that makes the test honest
Intensifier & pressure circuit	raises and holds test pressure	closed-loop control, not a hand pump
Pressure measurement	reads and logs the hold	calibrated, traceable
Deformation measurement	detects permanent set	resolution to a micron
Controller & recipes	runs the cycle the same way each time	recipes per shell size
Guarded enclosure	keeps people away from a pressurised article	interlocked, and rarely tested by events
Water management	supply, filtration, catch and return	a wet process kept tidy
Marking & segregation	separates accepted from rejected	no rejected body rejoins the flow
Records & traceability	result tied to the body's identity	defensible years later
Handling & automation	infeed, load, unload, outfeed	where production rate is won
Tooling sets	covers a family of shell sizes	changeover measured in minutes
Training & documentation	operators run it; records survive audits	handed over with the machine

The row that decides throughput is never the pressure circuit — it is handling and changeover. Raising pressure is quick; getting bodies in and out, and switching between sizes, is what a production plant actually buys.

Full specification — expand

Machine	Hydraulic proof-testing machine for empty shell bodies: frame and guarded enclosure, adjustable locating fixtures and interchangeable sealing heads, fill-and-purge circuit, intensifier pressure circuit under closed-loop control, pressure and permanent-deformation measurement, recipe controller, records and traceability, water management, marking and segregation, and optional handling and automation
The One Idea	If it fails, it should only leak. Water is nearly incompressible, so a body under hydraulic proof stores almost no energy — a failure weeps or splits rather than bursting
Why Proof Test	A body carries the consequences of its material, forging, heat treatment and machining, and most of them are invisible. Pressure makes them visible — on every body, not on a sample
The Two Verdicts	Leak, seen as pressure decay across the hold; and yield, seen as permanent deformation resolved to a micron. A sound body does neither
The Purge	Air left inside is compressible: it stores the energy a hydraulic test exists to avoid, and it softens the pressure curve enough to hide a slow leak. Filling and purging properly is what makes the result trustworthy
Pressure Capability	Operating range to approximately 1400 bar, with structural capacity to 1800 bar; hold times from a few seconds to about a minute, set by recipe. Machines are sized to the article and the standard being worked to
Rate	From a single manual station to production models exceeding two hundred bodies an hour in an automated cell — the difference is handling and changeover, not the pressure circuit
Tooling	Adjustable V-block fixtures, location cups and interchangeable sealing heads covering a family of shell sizes, with stored test recipes per size so changeover is parts and a selection, not a rebuild
Safety	The hydraulic medium is the first safety feature; around it sit a guarded, interlocked enclosure, controlled let-down, and a machine designed so the routine case and the failure case look much the same
Records	Every result written against the body's identity and the recipe used, so an accepted body can be traced to the test that accepted it long after everyone involved has moved on
Scope Boundary	The machine tests empty forged bodies. Nothing about what a shell may contain, or what it is for, appears on this page or in the machine's scope
Status	Neometrix has delivered bomb shell hydraulic pressure testing machines to Indian ordnance establishments and to defence manufacturers in India and abroad, and builds the class to order.

Configurations

One test, four machines.

The physics does not change with rate. Everything around it does.

Single station

Manual load

One test station, hand-loaded, full instrumentation and records. The right machine for a laboratory, a proving section or a low-rate line.

Semi-automatic

Assisted cycle

Hand loading with powered clamping, sealing and an automatic cycle from a stored recipe — faster and far more repeatable, without the cost of full handling.

Automated cell

Production rate

Infeed, robotic load and unload, automatic test, marking and segregation — the configuration that reaches production rate and runs inside a line.

And the fourth thing, which is not a machine at all but decides the other three: the tooling set — fixtures, location cups and sealing heads covering the family of shell sizes a plant actually runs, with a recipe stored for each.

Where it fits

Wherever a body must be proven, one at a time.

The test sits at the same point in every plant: after machining, before anything else.

Ordnance establishments

State manufacturing establishments running shell bodies at volume, where proof testing is a gate every body passes through and the records outlive the batch.

Private defence manufacturers

Newer entrants building shell bodies to order, who need the proof gate and its traceability from the first article onwards.

Export manufacturers

Plants supplying customers abroad, where an accepted body must be defensible against another country's inspection regime as well as their own.

Quality and proving laboratories

Where the machine is used for first-article approval, process qualification and investigation rather than for production flow.

Overhaul and re-certification

Where stored bodies must be re-proved before they re-enter use, and the question is the same one the machine was built to answer.

Line upgrades

Replacing a manual proof station inside an existing plant — usually the cheapest single change that lifts both throughput and traceability.

DRAG TO ROTATE · SCROLL TO ZOOM

Fig · 04 — The machine in three dimensions — the same model our engineers work from. Drag it, turn it, and look at how the station sits between the conveyors.

FAQ

Common questions.

Longer answers, for readers who want the reasoning.

Q · 01 Why hydraulic rather than pneumatic testing?

Because of stored energy, and it is not a close decision. A liquid is very nearly incompressible: to raise water to a high pressure you have to push only a tiny extra volume into the space, so the energy held in a filled body at test pressure is small. If that body then fails, the pressure collapses almost instantly — the crack opens, a little water escapes, and it is over. The body weeps or splits, and nothing is thrown. A gas behaves in the opposite way. Compressing it to the same pressure stores a great deal of energy in the same volume, and a failure releases all of it at once, turning the body and anything nearby into projectiles. That is why pressure-bearing articles are proof-tested hydraulically almost everywhere, and it is why the machine takes the trouble to purge the air before the test rather than simply filling and pressurising. Trapped air brings the gas problem back in miniature, and it does a second harm: an air pocket acts as a spring, so the pressure decays gently instead of sharply and a slow leak can hide behind a soft curve. The whole machine — frame, enclosure, circuit, sequence — is shaped by the decision to test with liquid, which is what makes a routine day and a failure day look much the same.

Q · 02 What actually makes a body fail the test?

Two things, and the machine is built to tell them apart. The first is a leak. Under a held pressure, a sound sealed body holds a flat line; a body with a through-path does not, and the pressure decays. The cause is usually something the eye cannot see — porosity from the melt, a fold from the forging, a crack opened by heat treatment, or a wall left thin by a machining error. The second is yield: permanent deformation. A sound body under proof stretches elastically and returns to its original size when the pressure is let down. One that has been taken past its material's limit does not come all the way back, and the difference is small enough that it has to be measured rather than looked for — resolution to a micron is what makes that verdict real. The distinction matters because the two failures point at different upstream problems: a leak usually indicts the material or the forging, while yield usually indicts wall thickness, heat treatment or the test pressure being wrong for that body. So the machine records both, against the body's identity, which turns a rejection from a shrug into information the plant can act on.

Q · 03 Why purge the air — is filling not enough?

No, and this is the step that separates a machine that gives trustworthy results from one that merely applies pressure. Filling a body from the bottom still leaves air trapped at the top and in every internal recess, and that trapped air does two damaging things. First, it reintroduces the hazard the hydraulic test exists to remove: compressed gas stores energy, and a pocket of it inside a body under test is a small version of exactly the failure mode nobody wants. Second, and more insidiously, it distorts the measurement. An air pocket behaves like a spring in the system, so when a small leak lets liquid escape the pressure falls slowly and smoothly rather than sharply. On a short hold, that gentle sag can sit inside the tolerance and a leaking body can be accepted. The machine therefore fills and purges deliberately — venting at the highest point, filling at a controlled rate so air is pushed ahead of the liquid rather than trapped by it, and confirming a solid fill before pressurisation begins. It costs a few seconds of cycle time and it is the reason the pressure curve can be believed.

Q · 04 How quickly can it change between shell sizes?

Minutes, if the machine was bought with that in mind — and this is worth specifying carefully, because changeover time, not cycle time, is usually what limits a plant that runs more than one size. Three things change with the article: the fixture that holds it, which is why the V-blocks are adjustable and the location cups are a set rather than a single part; the sealing head that closes its mouth, which is interchangeable and matched to the mouth form; and the recipe — the test pressure, the hold time and the acceptance limits for that body — which is stored in the controller and selected rather than dialled in. Done well, a changeover is: swap the sealing head, adjust or swap the location parts, select the recipe, run a proving piece. Done badly — with bespoke tooling per size and settings entered by hand — it becomes a half-day job that quietly encourages a plant to batch work in ways it would rather not. So when specifying, the questions worth asking are which sizes the machine must cover on day one, which it might cover later, and how many minutes a changeover is allowed to take. Those answers shape the tooling set more than the pressure rating does.

Q · 05 What does automation actually add?

Rate, consistency and record integrity — in that order of obviousness, and roughly the reverse order of importance. The rate argument is the visible one: a hand-loaded station spends most of its cycle being loaded and unloaded rather than testing, so adding infeed, robotic load and unload, and outfeed can multiply throughput without touching the pressure circuit at all. The consistency argument is better: a machine that clamps, seals, purges and pressurises the same way every time removes the operator's day from the result, which matters because proof testing is a comparison between bodies and anything that varies between them is noise. The record argument is the one that decides audits: when handling is automatic, the body's identity can be read at load and carried through to the verdict without anybody transcribing anything, so the link between a body and its test is machine-made rather than clerical. Automation also handles the unglamorous part properly — segregating a rejected body so it cannot rejoin the accepted flow, which is exactly the failure that a busy manual station is prone to. The trade is cost, footprint and a more demanding installation, which is why the same machine is offered manual, assisted and fully automated.

Q · 06 Has Neometrix delivered machines of this class?

Yes. Neometrix has delivered bomb shell hydraulic pressure testing machines to Indian ordnance establishments and to defence manufacturers in India and abroad, and builds the class to order. This is a machine we have made repeatedly rather than a capability we are proposing, and the page is written from that experience — which is why it dwells on purging, changeover and handling rather than on pressure ratings. Customers are described as classes and never named here: who buys defence production equipment is their business to disclose, not ours, and a supplier who publishes a customer list has usually stopped thinking about the customer. What we will do, in a quotation, is describe the comparable machines in detail and arrange the references a serious buyer needs. Around this machine sits the wider competence this site shows: high-pressure hydraulic systems as the house trade across dozens of test rigs, guarded test enclosures, production automation and handling, and the test-and-proof equipment and production-line work in the same lane. The honest shape of a new order is the one the delivered ones followed: size the machine to the article and the standard, agree the tooling family, prove the cycle on first articles, and hand over with the records regime the plant will be audited on.

Q · 07 What test pressure should a body be taken to?

Whatever the customer's standard says — and that is not evasion, it is the only correct answer. Proof test pressure is not a machine parameter chosen by the machine's maker; it is a property of the article and the specification it is built to, derived from the pressure the body must survive in service with a margin applied, and set out in the drawing or the governing standard along with the hold time and the acceptance limits. Our part is to build a machine that can reach and hold whatever that figure is, accurately, repeatably and safely, and to record the result in the form the customer's inspection regime requires. In practice that means machines in this class are specified with an operating range comfortably above the highest test pressure the plant expects to use, and a structural capacity above that again, so the frame, the sealing head and the circuit are never working at their own limit while doing routine work. It also means the controller holds a recipe per article rather than a single setting: different bodies, different standards, different numbers. If a customer arrives without a standard in hand, that is the first conversation to have — because a proof test to an unspecified pressure proves nothing that an inspector will accept.

Q · 08 What is in the machine's scope, and what is not?

The scope is deliberately narrow, and stating it plainly is part of how this machine is sold. What is in it: the machine and its frame, the guarded enclosure and interlocks, the locating fixtures, location cups and interchangeable sealing heads for the agreed family of shell sizes, the fill-and-purge circuit, the intensifier and pressure circuit with its closed-loop control, the pressure and deformation measurement, the controller and its recipes, water supply and management, marking and segregation, records and traceability, any handling and automation agreed, commissioning, training and documentation. What is not: the bodies themselves, which are the customer's article; the customer's standard and acceptance criteria, which are theirs to set; and anything at all to do with what a shell may contain or what it is for — this machine tests an empty forged body and nothing else, and that boundary is real rather than presentational. It is also worth saying what the machine does not replace: proof testing is one gate among several, and it sits alongside dimensional inspection and whatever non-destructive examination the standard calls for. A body that passes a proof test has proven it holds pressure. That is a great deal, and it is not everything.

The forming, the proving, and the packing.

Three neighbours along the same production line.

↗ The forming

Copper Band Press

Another station on the same line — forming work on the body before it is proven.

↗ The proving

Small-Arms Test & Proof Equipment

The same measure-and-certify discipline at the other end of the size range.

↗ The packing

Packing & Container Line

What happens after a body has been accepted — packed, sealed and made ready to move.

Browse all Neometrix product lines.

Get a quotation

Tell us the bodies, the standard,
and the rate you must run at.

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

Enquire — proof test machine Capability sheet (PDF) +91 7777 876 876

ISO 9001 / 14001 DELIVERED CLASS — BOMB SHELL HYDRAULIC PRESSURE TESTING MACHINE LOCATE · SEAL · PURGE · PRESSURISE · HOLD · RECORD — IF IT FAILS, IT SHOULD ONLY LEAK ENGINEERED IN NOIDA · INDIA

If it fails, it should only leak.

Why every body is tested, not sampled.

What the test is actually looking for

Why water and not air

Production, not laboratory

Eight steps, one verdict.

1 · Load & locate

2 · Seal

3 · Fill & purge

4 · Pressurise & hold

5 · Watch

6 · Release, record, unload

What the machine contains, element by element.

One test, four machines.

Manual load

Assisted cycle

Production rate

Wherever a body must be proven, one at a time.

Ordnance establishments

Private defence manufacturers

Export manufacturers

Quality and proving laboratories

Overhaul and re-certification

Line upgrades

Common questions.

The forming, the proving, and the packing.

Copper Band Press

Small-Arms Test & Proof Equipment

Packing & Container Line

Tell us the bodies, the standard,
and the rate you must run at.

Similar Products

Share This Page

If it fails, it should only leak.

Why every body is tested, not sampled.

What the test is actually looking for

Why water and not air

Production, not laboratory

Eight steps, one verdict.

1 · Load & locate

2 · Seal

3 · Fill & purge

4 · Pressurise & hold

5 · Watch

6 · Release, record, unload

What the machine contains, element by element.

One test, four machines.

Manual load

Assisted cycle

Production rate

Wherever a body must be proven, one at a time.

Ordnance establishments

Private defence manufacturers

Export manufacturers

Quality and proving laboratories

Overhaul and re-certification

Line upgrades

Common questions.

The forming, the proving, and the packing.

Copper Band Press

Small-Arms Test & Proof Equipment

Packing & Container Line

Tell us the bodies, the standard,and the rate you must run at.

Similar Products

Share This Page

Tell us the bodies, the standard,
and the rate you must run at.