CNG Circuit Leak Testing Machine / Haskel Booster · 345 bar / Volvo Bus CNG Circuits / India

CNGLT · HASKEL BOOSTER

CNG Circuit Leak Testing Machine, built for 345 bar — no electricity needed.

A pneumatic, air-driven Haskel booster system engineered for high-pressure leak testing, pressure-hold validation and cylinder filling on CNG-powered Volvo buses. With zero electrical dependency, it is built for explosion-prone maintenance bays, and with dual booster redundancy and selectable 10–200 kg/cm2 outputs, it keeps Volvo bus fleet CNG circuit testing running without interruption.

Request proposal Technical specifications

CNG circuit leak testing machine for Volvo buses - bus CNG fuel line pressure decay and leakage detection system for fleet maintenance by Neometrix

Fig · 01 Full system view · Haskel booster skid with dual-gauge control panel

Booster Max Pressure

345bar

Output Range

10–200kg/cm²

Drive Pressure (Air)

4kg/cm² min

Drive Flow Rate

60scfm

Dew Point

−40°c

Overview

Purpose-built for Volvo bus CNG circuits.

The CNG Circuit Leak Testing Machine is a mission-critical solution developed specifically to address high-pressure gas circuit testing in modern CNG-powered buses, especially those operated by Volvo.

CNG circuit leak testing machine for Volvo buses product view - portable CNG pressure test rig for bus fuel system safety inspection by Neometrix

Fig · 02 Haskel booster assembly with dual-pressure gauge panel

As the transportation industry shifts toward cleaner fuels like compressed natural gas, Volvo bus fleets depend on gas delivery systems that meet stringent safety, efficiency and environmental standards before a bus ever returns to service. This machine validates exactly that — the integrity of the Volvo bus CNG fuel circuit, from cylinder to regulator to delivery line — using the same pressure-decay method employed across defence and industrial gas-testing programmes.

Built around the renowned Haskel air-driven booster, the system generates pressures up to 345 bar (5000 PSI) purely pneumatically, with no electrical dependency, making it ideal for deployment in explosion-prone or flammable-gas maintenance bays. Its modular, space-saving architecture allows installation within compact maintenance bays, portable test rigs, or fixed stations serving Volvo bus depots, production lines and research facilities alike.

No electricity. No ignition risk. Just pneumatic pressure, precisely controlled.

Multiple selectable output pressures (10, 50, 100 and 200 kg/cm2) with manual stepped ramp-up, dual booster redundancy, and 5-micron inlet filtration combine to give Volvo bus maintenance teams a dependable, low-maintenance instrument for CNG circuit validation across the fleet's service life.

Key Features

Safety, redundancy, precision.

The system is packed with features that prioritize operator safety, ease of use and repeatable high performance.

F · 01

Haskel Booster to 345 bar

Air-driven booster reaches 345 bar without electricity, ensuring safe CNG testing in explosion-risk bays.

Non-Electric

F · 02

Dual Booster Configuration

Primary and standby boosters guarantee uninterrupted Volvo bus CNG circuit pressure testing and cross-validation.

Redundancy

F · 03

Selectable Output Pressures

Outputs of 10, 50, 100 and 200 kg/cm2 with manual stepped ramp-up protect sensitive CNG test components.

10–200 kg/cm²

F · 04

Ultra-Fine Filtration

N2, O2, He and H2 gas compatible; 5 µm inlet filters preserve purity and protect the booster in every CNG test run.

5 µm Filtration

F · 05

Quick-Change Connectors

Quick-change couplers minimize changeover time between CNG test cycles, improving workshop floor productivity.

Faster Cycles

F · 06

Space-Conscious Design

Compact design fits into fixed maintenance bays or portable service vans without requiring floor layout changes.

Mobile-Ready

F · 07

Pressure-Decay Leak Detection

Calibrated pressure-decay method detects micro and macro leaks in CNG pipelines, regulators, valves and hose assemblies.

Micro & Macro Leaks

F · 08

Multi-Programme Use

Applies to OEM production validation, third-party certification labs, MRO endurance testing, and cylinder filling.

OEM & MRO

Applications

Where it runs.

Tailored for leak testing and pressure validation in Volvo buses' CNG circuits, the machine also proves invaluable across diverse industrial and scientific use cases.

A · 01Detect micro and macro leaks in gas pipelines, regulators, valves and fittings via pressure decay

A · 02Pressure-endurance testing of flexible hoses and static gas assemblies under cyclic load

A · 03Controlled high-pressure filling of gas cylinders for vehicle tanks or laboratory use

A · 04Testing with N2 (inert), He (ultra-fine leak detection), O2 and H2 (fuel-cell tech)

A · 05Integration into OEM testing cells, third-party validation labs or mobile service vans

Image Gallery

The machine, in the workshop.

Component detail from a delivered CNG Circuit Leak Testing Machine — Haskel booster, gauge panel and pneumatic control assembly.

CNG circuit leak testing machine for Volvo buses component detail - Haskel booster and gauge panel by Neometrix

CNG circuit leak testing machine for Volvo buses component detail - pneumatic control and filtration assembly by Neometrix

CNG circuit leak testing machine for Volvo buses full skid view - quick-change connector and hose assembly detail by Neometrix

Fig · 03–05 Component detail · booster and gauge panel, control assembly, and full skid with connectors

Downloads

General arrangement.

GA and design drawings for the CNG Circuit Leak Testing Machine, available as PDF for procurement and technical review.

Drawing · General

CNG Circuit Leak Testing Machine — General Arrangement

PDF

Drawing · Design 1

CNG Circuit Leak Testing Machine — Design Drawing 1

PDF

Drawing · Design 2

CNG Circuit Leak Testing Machine — Design Drawing 2

PDF

Specifications

Full technical parameters.

Key system parameters for the standard Neometrix CNG Circuit Leak Testing Machine configuration.

Drive Pressure (Air)	Minimum 4 kg/cm² input ensures efficient booster operation
Drive Air Purity (2.0)	7 micron filtering for general use
Drive Air Purity (6.0)	5 micron filtering required for high-purity gases like O₂
Drive Flow Rate	60 SCFM (adjustable based on booster load profile)
Dew Point Temperature	−40°C to prevent condensation and freezing
Inlet Nitrogen Pressure	17–150 kg/cm² standard range
Inlet Nitrogen Purity	5 micron for clean operation and extended equipment life
Output Pressure Range	10, 50, 100, 200 kg/cm² — adjustable based on testing needs
Booster Max Pressure	345 bar — suitable for high-pressure applications
Medium Compatibility	Compatible with air, N₂, He, O₂, H₂ (materials chosen accordingly)

In Depth

The complete technical read.

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

Introduction

The CNG Circuit Leak Testing Machine is a sophisticated and mission-critical solution meticulously developed to address the challenges of high-pressure gas circuit testing in modern CNG-powered buses, especially those used by Volvo. In light of the transportation industry's shift towards cleaner fuels like compressed natural gas, this machine ensures that gas delivery systems meet stringent safety, efficiency and environmental standards.

Built around the renowned Haskel air-driven booster technology, this system generates extreme pressures of up to 345 bar (5000 PSI) purely pneumatically — without any electrical dependency — making it ideal for deployment in explosion-prone or flammable gas environments. Its design incorporates modular components and space-saving architecture, enabling installation within compact maintenance bays, portable test rigs, or fixed stations in production and research facilities.

Applications

The machine's versatility lies in its ability to perform a broad range of tests and filling operations under varying pressure profiles. While it is tailored for leak testing and pressure validation in Volvo buses' CNG circuits, it also proves invaluable in diverse industrial and scientific use cases. Key applications include:

Detection of micro and macro leaks in gas pipelines, regulators, valves and fittings using calibrated pressure-decay methods.
Pressure-endurance testing of flexible hoses and static gas assemblies under cyclic load conditions.
Controlled high-pressure filling of gas cylinders for vehicle tanks or laboratory use.
Testing with various gases — N2 for inert testing, H2 for emerging hydrogen fuel-cell tech, He for ultra-fine leak detection, and O2 for medical and aerospace applications.
Integration into OEM testing cells, third-party validation labs, or mobile service vans.

By accommodating these varied needs, the machine ensures regulatory compliance and equipment validation in R&D, production and MRO (maintenance, repair, overhaul) environments.

Operating Procedure

To ensure a safe and effective test process, the machine must be operated following a clearly defined sequence:

1. Preparation: inspect all connection points, check filters, and confirm availability of the drive-air source (minimum 4 kg/cm2, −40°C dew point).
2. Inlet gas setup: attach the high-pressure gas cylinder (e.g. N2 or O2) and verify filter and regulator conditions.
3. Controlled pressurization: set the desired output pressure using manual or stepped valves.
4. Test execution: monitor pressure hold, drop or cycling per test specification, and record data.
5. Safe venting: after test completion, vent the system gradually using built-in safety valves and disconnect components with caution.

The system's built-in safety features, including relief valves and vent silencers, safeguard both equipment and operators from over-pressure incidents.

Maintenance

Designed for rugged industrial use, the machine has a low-maintenance footprint. Nevertheless, the following best practices are recommended:

Weekly: visual inspection of all hoses, connectors and valves; check for pressure stability.
Monthly: replace all air and gas filters; inspect O-rings and seals for wear.
Annually: conduct full calibration of gauges and pressure regulators; service the Haskel booster as per OEM guidelines.

Because the system lacks complex electronics or motors, its service intervals are longer, making it highly reliable and cost-effective over its lifecycle.

Conclusion

The CNG Circuit Leak Testing Machine from Neometrix is more than a testing tool — it is a strategic asset for ensuring safety, compliance and performance in high-pressure gas systems. Designed to accommodate both current and future testing needs across multiple gases and industrial verticals, it empowers operators with precision control, robust safety features and operational simplicity. Whether integrated into a production line, used in routine maintenance of Volvo public-transport fleets, or deployed in cutting-edge R&D setups, this machine delivers reliable results with minimal operational costs.

FAQ

Common questions.

Plain-language answers from the engineering team.

Q · 01 What is the CNG Circuit Leak Testing Machine for Volvo Buses?

It is a pneumatic, air-driven test system built by Neometrix Engineering Pvt Ltd for high-pressure leak testing, pressure-hold validation and cylinder filling of CNG fuel circuits on Volvo buses, using a Haskel booster that reaches up to 345 bar without any electrical input.

Q · 02 Why is the machine built around a non-electric, air-driven booster?

The Haskel booster is driven entirely by compressed air, so the machine generates pressures up to 345 bar with no electrical ignition source. This makes it suitable for use in explosion-prone or flammable-gas maintenance bays where CNG bus fuel circuits are tested.

Q · 03 What output pressure ranges does the machine support?

Operators can select from 10, 50, 100 and 200 kg/cm2 output pressure profiles, with manual and stepped pressurization for a progressive ramp-up that protects sensitive CNG circuit components during testing.

Q · 04 Why does the machine use dual boosters?

A primary and a standby booster provide redundancy so that Volvo bus CNG circuit testing continues uninterrupted, and results can be cross-validated between the two boosters during high-volume workshop testing.

Q · 05 Which gases is the CNG Circuit Leak Testing Machine compatible with?

The machine is compatible with air, nitrogen (N2), oxygen (O2), helium (He) and hydrogen (H2). N2 is used for inert testing, He for ultra-fine leak detection, and O2/H2 for medical, aerospace and emerging fuel-cell applications, with wetted materials selected accordingly.

Q · 06 How does the machine detect leaks in the CNG circuit?

The machine uses a calibrated pressure-decay method to detect both micro and macro leaks in CNG pipelines, regulators, valves and hose fittings, and also supports pressure-endurance testing of flexible hoses under cyclic load.

Q · 07 What is the recommended operating procedure?

The sequence is: inspect connection points and filters and confirm drive-air supply; attach and verify the inlet gas cylinder; set the desired output pressure via manual or stepped valves; run the test while monitoring pressure hold, drop or cycling; then vent the system gradually through the built-in safety valves before disconnecting.

Q · 08 How can I get a quotation for the CNG Circuit Leak Testing Machine for Volvo Buses?

You can request a quotation for the machine by contacting Neometrix Engineering Pvt Ltd through https://neometrixgroup.com/products/cng-circuit-leak-testing-machine-for-volvo-buses or by phone at +91-7777-876-876.

Get a proposal

Tell us your Volvo bus fleet
CNG test requirements.

We size the booster stage, configure the pressure profiles, and walk through the leak-detection and cylinder-filling test programme with your maintenance team before you commit.

Request proposal +91 7777 876 876

CNG Circuit Leak Testing Machine, built for 345 bar — no electricity needed.

Purpose-built for Volvo bus CNG circuits.