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 oxygen delivery system leak testing equipment 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 dependable, portable oxygen leak detection equipment 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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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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