KU-7 Oxygen Tester / Dual-Range to 4,000 psi / NASA-STD-7012 · MIL-PRF-25567 / India

KU-7 · OXYGEN LEAK TESTER

KU-7 Oxygen Tester, dual-range to 4,000 psi.

A mobile, high-precision leak-testing system that uses inert nitrogen to verify the integrity of oxygen-handling components across two pressure ranges — up to 4,000 psi for qualification endurance checks and down to 50 psi for fine-leak acceptance testing. A rugged, quick-clamp chamber and dual regulators ensure uniform sealing and rapid mode switching, while integrated gauges, a rotameter and safety relief valves provide real-time monitoring and overpressure protection on a compact, wheeled frame.

Request proposal Specifications

KU-7 oxygen tester - portable aircraft oxygen system leak and pressure integrity test equipment for defence aviation MRO by Neometrix

Fig · 01 KU-7 Oxygen Tester · dual-range nitrogen leak/pressure test unit on wheeled trolley frame

Designed and tested to:

NASA-STD-7012 MIL-PRF-25567 ASTM G93

High-Pressure Test

4000psi

Low-Pressure Test

50psi

Leak Sensitivity

10−4 mbar·L/s

Max N₂ Outlet

300bar

Unit Weight

12.2kg

Overview

Two pressure regimes, one trolley.

Oxygen systems in aircraft and aerospace applications demand the highest integrity — even minute leaks pose real safety risks. The KU-7 Oxygen Tester eliminates combustion risk during pressurization while still verifying leak-tight performance.

KU-7 oxygen tester product view - aircraft oxygen system pressure hold and leakage detection tool for airforce maintenance by Neometrix

Fig · 02 Quick-clamp leak chamber, dual regulators and gauge panel on the KU-7 trolley frame

The KU-7 Oxygen Tester is a mobile, high-precision leak-testing system that uses inert nitrogen to verify the integrity of oxygen-handling components across two pressure ranges — up to 4,000 psi for endurance checks and down to 50 psi for fine-leak detection. Its rugged, quick-clamp chamber and dual regulators ensure uniform sealing and rapid mode switching, while integrated gauges, a rotameter and safety relief valves provide real-time monitoring and overpressure protection.

Its dual-range capability covers both qualification (high-pressure endurance) and acceptance (fine-leak characterization) regimes, per guidelines in NASA-STD-7012 for leak-test sensitivity down to approximately 1×10−4 mbar·L/s. Mounted on a compact trolley, the tester travels easily from hangar bay to flight-line, enabling on-site verification without dismantling large assemblies.

One tester. Two pressure regimes. Zero combustion risk.

Compliance with aerospace and defense leak-test standards is built in, making the KU-7 a dependable, portable leak detector for on-site maintenance, quality assurance and research applications where oxygen system testing cannot be compromised.

System Description

Six subsystems, one trolley frame.

Every element of the KU-7 sealed-chamber leak tester is built around a chrome-plated chamber, precision regulators and redundant overpressure protection.

Sub · 01

Leak Chamber

10 × 20 in. cylindrical vessel, chrome-plated interior, with six port fittings for various UUT geometries and O-ring seals with quick-release clamps.

Sub · 02

Pressure Regulators & Gauges

Precision back-pressure regulators, ±0.5% full-scale accuracy; gauges cover 0–8,600 psi, 0–140 psi and 0–60 psi ranges.

Sub · 03

Needle Valves & Isolation

Five metering valves (¼″ OD tubing, 345 bar rating) route gas to test ports, purge lines and relief vents; quick-disconnect fittings permit rapid reconfiguration.

Sub · 04

Flowmeter (Rotameter)

Glass-tube rotameter with a stainless-steel float, 0–6 SCFH, readable to ±2% accuracy for flow-rate verification before sealed-chamber tests.

Sub · 05

Safety Valves

Two spring-loaded relief valves calibrated at 10 bar; built-in burst discs provide dual-layer protection against catastrophic overpressure events.

Sub · 06

Chassis & Mobility

Welded tubular-steel frame, powder-coated for corrosion resistance, with four 5″ polyurethane wheels (two locking) and an ergonomic tug handle.

Key Features

Precision, on a trolley.

Dual-stage pressure control, high-sensitivity leak detection and layered overpressure protection, all in a footprint under 2 ft².

F · 01

Dual-Stage Pressure Control

Two independent regulators tame shop-air down to test pressures of 4,000 psi (qualification) and 50 psi (acceptance), supporting rapid switch-over between test modes.

Qualification & Acceptance

F · 02

High-Sensitivity Leak Detection

Chamber and gauge calibration ensure detection of leaks as small as 1×10−4 mbar·L/s, compliant with aerospace leak-test requirements.

NASA-STD-7012

F · 03

Robust Chamber Design

Precision-machined, chrome-plated chamber with O-ring seals and quick-release clamps maintains uniform gasket compression for consistent dwell-time pressure-hold tests.

Quick-Clamp Chamber

F · 04

Integrated Flow Monitoring

A rotameter (0–6 SCFH) allows trace-gas methods such as helium sniff and confirms purge rates for rapid localization of leaks.

Rotameter Monitoring

F · 05

Safety Protections

Dual pressure-relief valves (0–10 bar) and color-coded warning labels mitigate overpressure incidents, while needle-valve arrangements isolate test circuits before venting.

Overpressure Protection

F · 06

Portability & Ergonomics

Lockable swivel casters, integrated handle and a footprint under 2 ft² let technicians maneuver in tight spaces without cranes or dollies.

Field Leak Verification

Image Gallery

The tester, up close.

Component detail from a delivered KU-7 Oxygen Tester.

KU-7 oxygen tester component detail - aircraft oxygen circuit pressure and leak verification instrument by Neometrix

Fig · 03 KU-7 Oxygen Tester · chamber, regulator and gauge detail

Downloads

General & design drawings.

General arrangement and design drawings for the KU-7 Oxygen Tester, available as PDF for procurement and technical review.

Drawing · General

KU-7 Oxygen Tester — General Arrangement

PDF

Drawing · Design 1

KU-7 Oxygen Tester — Design Drawing 1

PDF

Drawing · Design 2

KU-7 Oxygen Tester — Design Drawing 2

PDF

Drawing · Design 3

KU-7 Oxygen Tester — Design Drawing 3

PDF

Specifications

Full technical parameters.

Key system parameters for the standard Neometrix KU-7 Oxygen Tester configuration.

Drive Air Pressure	4–8 bar (60–120 psi)
Drive Air Flow	10–80 scfm
Drive Ratio	75:1
Inlet N₂ Pressure Range	20–150 bar (300–2,175 psi)
Max Outlet N₂ Pressure	300 bar (4,350 psi)
Displacement per Cycle	1.2 in³ (≈19.6 mL)
Max Cycle Rate	60 cycles/min
High-Pressure Test Mode	4,000 psi, 10 min hold, <1% gauge drift allowed
Low-Pressure Test Mode	50 psi, 5 min hold
Leak Sensitivity	Down to 1×10−4 mbar·L/s (NASA-STD-7012 guidance)
Leak Chamber	10 × 20 in., chrome-plated, six port fittings
Pressure Gauges	0–8,600 psi / 0–140 psi / 0–60 psi, ±0.5% FS
Rotameter	0–6 SCFH, ±2% accuracy
Relief Valves	Two spring-loaded, calibrated at 10 bar, plus burst discs
Needle Valves	Five metering valves, ¼″ OD tubing, 345 bar rating
Weight	27 lb (12.2 kg)
Frame Dimensions (L×W×H)	750 × 450 × 540 mm
Footprint	Under 2 ft²
Mobility	Four 5″ polyurethane wheels, two locking, tug handle
Gas Connection	Interchangeable 3/8″ SAE or ¼″ H/P
Material	Stainless-steel booster; MS frame
Control Elements	Festo filter, regulator, ball valves
Data Logging (Optional)	Add-on digital transducers with USB/Ethernet output
Reference Standards	NASA-STD-7012 (leak sensitivity) · MIL-PRF-25567 (leak-detection compounds) · ASTM G93 (oxygen-service cleaning)

Applications

Where it runs.

From flight-line maintenance to spaceflight hardware validation, the KU-7 serves the full lifecycle of oxygen-handling components.

A · 01Aircraft oxygen supply maintenance — regulators, manifold assemblies and pressure-demand valves during scheduled A-checks and C-checks

A · 02Defense subsystems QA/QC — factory acceptance testing of breathing-air packs and escape-system bottles to MIL-PRF-25567

A · 03Spaceflight hardware validation — pre-launch inspection of portable life-support units and EVA backpacks

A · 04Laboratory & R&D prototyping — valve design and materials-compatibility studies under oxygen service

In Depth

The complete technical read.

Engineering narrative for maintenance engineers, procurement teams and QA managers who want the full picture before committing to a test programme.

Introduction

Oxygen systems in aircraft and aerospace applications demand the highest integrity: even minute leaks can pose serious safety risks — fire hazards in enriched-oxygen environments, system failures at altitude, and non-compliance with military and NASA standards. The KU-7 Oxygen Tester uses high-purity nitrogen as an inert test medium to eliminate combustion risk during pressurization. Its dual-range capability (up to 4,000 psi and down to 50 psi) covers both qualification (high-pressure endurance) and acceptance (fine-leak characterization) regimes, per guidelines in NASA-STD-7012 for leak-test sensitivity (down to approximately 1×10−4 mbar·L/s). Mounted on a compact trolley, the tester travels easily from hangar bay to flight-line, enabling on-site verification without dismantling large assemblies.

Operating overview

1. Setup & pre-check: connect shop-air/nitrogen supply (6,000 psi), verify regulator setpoints, purge lines at 3 SCFH for 30 s.
2. UUT installation: mount component inside chamber; attach port adaptors; tighten quick-release clamps.
3. High-pressure test: isolate purge; pressurize to 4,000 psi at 200 psi/min to minimize thermal effects, hold for 10 min, monitor gauge drift (<1% drop allowed).
4. Low-pressure test: vent chamber; reset regulator; pressurize to 50 psi, hold for 5 min, check no audible or gauge-indicated leakage.
5. Leak localization: introduce a helium tracer (1% by volume) and sweep chamber exterior with a sniff probe via the rotameter line.

Maintenance guidelines

Daily: inspect hoses/fittings for wear; verify regulator knob operation; check relief-valve functionality.
Weekly: perform calibration drift check against master gauge; clean chamber interior and seals with oxygen-compatible solvent per ASTM G93.
Annual: full gauge and regulator recalibration; replace O-rings and burst discs; verify rotameter float zero.
Safety note: never introduce lubricants or oils in oxygen circuits. Always bleed residual pressure through dedicated vents before opening the chamber.

Conclusion

With its rigorous adherence to aerospace leak-test standards, dual-range capability and user-centric design, the KU-7 Oxygen Tester stands as a cornerstone tool for maintenance, quality assurance and R&D in oxygen-handling systems. Its portability, high-sensitivity detection and modular instrumentation make it uniquely suited to keep critical life-support and propulsion subsystems safe, compliant and mission-ready.

FAQ

Common questions.

Plain-language answers from the engineering team.

Q · 01 What is the KU-7 Oxygen Tester?

The KU-7 Oxygen Tester is a mobile, dual-range nitrogen leak and pressure integrity test system designed and manufactured by Neometrix Engineering Pvt Ltd, India, for verifying oxygen-handling components up to 4,000 psi and down to 50 psi in a single portable unit.

Q · 02 Who manufactures the KU-7 Oxygen Tester?

The KU-7 Oxygen Tester is designed and manufactured by Neometrix Engineering Pvt Ltd, a leading test equipment manufacturer based in India.

Q · 03 Why does the KU-7 use nitrogen instead of oxygen for leak testing?

The KU-7 uses high-purity nitrogen as an inert test medium so pressurization of oxygen-service hardware carries no combustion risk, while still allowing accurate leak-rate verification of the component under test.

Q · 04 What pressure ranges and leak sensitivity does the KU-7 Oxygen Tester achieve?

The KU-7 covers a high-pressure qualification mode to 4,000 psi and a low-pressure acceptance mode to 50 psi, with detection sensitivity down to 1×10−4 mbar·L/s, in line with NASA-STD-7012 leak-test guidelines.

Q · 05 What industries and applications use the KU-7 Oxygen Tester?

The KU-7 is used for aircraft oxygen supply maintenance (A-checks and C-checks), defense breathing-air and escape-system QA/QC to MIL-PRF-25567, spaceflight and EVA hardware validation, and laboratory/R&D prototyping of gas-handling components.

Q · 06 Does the KU-7 Oxygen Tester comply with relevant standards?

Yes. The KU-7 is designed around NASA-STD-7012 leak-test sensitivity guidelines, supports acceptance testing to MIL-PRF-25567 for oxygen leak-detection compounds, and its oxygen-service cleaning procedure follows ASTM G93.

Q · 07 What are the key features of the KU-7 Oxygen Tester?

Key features include dual-stage pressure regulation, a chrome-plated quick-clamp chamber, an integrated rotameter for purge and trace-gas sniff verification, dual pressure-relief valves with burst-disc protection, and a compact, castor-mounted trolley frame.

Q · 08 Is the KU-7 Oxygen Tester customizable?

Yes, Neometrix offers customized versions of the KU-7 Oxygen Tester, including optional digital transducers and USB/Ethernet data logging, tailored to specific client requirements and operational parameters.

Q · 09 What after-sales support does Neometrix provide for the KU-7 Oxygen Tester?

Neometrix provides comprehensive after-sales support including installation, commissioning, operator training, preventive maintenance, calibration, and on-site service for the KU-7 Oxygen Tester.

Q · 10 How can I get a quotation for the KU-7 Oxygen Tester?

You can request a quotation for the KU-7 Oxygen Tester by contacting Neometrix Engineering Pvt Ltd through https://neometrixgroup.com/products/KU-7-leak-tester or by phone at +91-7777-876-876.

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Tell us your test pressure
and chamber requirements.

We size the regulators, configure the chamber and instrumentation, and walk through the qualification and acceptance test programme with your QA team before you commit.

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KU-7 Oxygen Tester, dual-range to 4,000 psi.

Two pressure regimes, one trolley.