Gas Low Pressure Regulators

Are you looking for the right low-pressure gas regulator for your gas supply? You’ve come to the right place. Our range of precision pressure regulators ensures safe pressure reduction from the cylinder or supply line to the level required by the appliance, providing you with a stable flow and protecting your equipment.

Each gas pressure regulator is built with a robust regulator body and designed to meet demanding applications across: industrial facilities, laboratories, research centers, and other professional environments. They are suitable for use with a wide range of gases, including compressed air, hydrogen, carbon dioxide, argon, acetylene, oxygen and more, regardless of the flow rate you need. Integrated connectors and optional pressure gauge ports make installation and measurement both simple and accurate. Before use, always verify that the regulator is properly installed and matches the product specifications.

Designed to be durable and reliable, our pressure regulators continue to contribute to the proper functioning of your gas-powered equipment, whether in direct connection to a cylinder or as part of a larger distribution system. Whether for main supply lines or portable cylinders, you can rely on our regular quality standards and certified performance.

Key features:

Stable outlet pressure for consistent performance
UL and CE certified for peace of mind

When you choose from our series of gas regulators, you benefit from proven quality that is recognized worldwide.

What Is a Low-Pressure Gas Regulator?

A low-pressure regulator for gas is an essential piece of equipment that reduces the inlet pressure from a cylinder or gas line to a safe operating level, typically between 1 and 35 bar, or even a few millibar, depending on the application. In specialty gas and high-purity environments, this second-stage regulation is critical after an initial high-pressure regulator has dropped the pressure to an intermediate level. Without a stable output, most laboratory instruments will not function properly and accuracy will not be maintained. A constant, finely controlled outlet pressure protects sensitive instruments like chromatographs, mass spectrometers, and gas analyzers while ensuring reproducible results.

Low-pressure regulators are also vital when working with different gas supplies, where maintaining clean gas content and precise flow is crucial. The purpose of these regulators is not only to safeguard instruments but also to provide reliability across diverse applications. Whether you search for solutions in laboratories, industries, or research facilities, our regulators help create a safer and more efficient working environment.

Although there are high-pressure regulators for reducing high inlet pressures of up to 300 bar (4300 psi), low-pressure regulators are essential for end uses of gas that require greater stability.

Ready to make the best choice? Scroll down to the Key Selection Criteria section.

How Does a Low-Pressure Regulator Work?

A low-pressure regulator reduces the inlet pressure from the cylinder or gas line to provide a controlled outlet pressure and stable gas flow. This process takes place in three key stages:

High-pressure gas from the cylinder or gas line enters the regulator. The internal seats are designed to withstand this level of stress while beginning the pressure reduction process. Always verify the maximum inlet rating before use.
The spring and diaphragm modulate the flow: When the gas pushes against the diaphragm, the regulator's spring mechanism balances this force to precisely control the opening of the valve. This dynamic adjustment ensures that the outlet is not exposed to the raw inlet pressure, but to a regulated and usable level.Users must select the right regulator to match flow and pressure requirements.
The gas exits the regulator at a stable, specified pressure. The regulator ensures a stable and constant outlet pressure so that instruments, appliances, or devices can function properly. A smart regulator design adds safety by incorporating a relief valve that vents excess pressure if limits are exceeded.

Applications of Gas Low Pressure Regulators

Gas low pressure regulators play a vital role in environments where precision, purity, and stability are critical. They are specifically designed to ensure accurate pressure when working with specialty gases and high-purity gases, preventing contamination and guaranteeing reliable results. Our regulators offer unmatched reliability and flexibility across multiple applications.

In laboratories, low-pressure regulators are available in more than one type, allowing professionals to select the right configuration for their instruments. They can easily connect to gas lines or cylinders and provide stable outlet pressure, which protects sensitive equipment, improves measurement accuracy, and ensures data reproducibility in research and quality control.

Specialty gases are also used in many industrial sectors such as pharmaceuticals, semiconductors, and materials science. Low-pressure regulators ensure controlled flow rates for processes such as coating, plasma treatment, and chemical vapor deposition, where even slight pressure fluctuations can affect results.

Benefits of Gas Low Pressure Regulators

Rotarex products deliver a range of advantages that make them indispensable in laboratory, high-purity, and specialty gas applications. Their precision engineering and robust construction offer reliability, safe and long-term performance across demanding environments.

Consistancy Accuracy
Easy Integration
Safe Gas Handling
Comprehensive View of Safety and Efficiency

Key Selection Criteria

There are several factors to consider when choosing the right regulator for your needs.

Regulator technology – Choose between a single-stage or dual stage design depending on the stability required. Some models are adjustable, while others are preset for specific applications.
Inlet pressure – Match the regulator to the maximum pressure of the gas source (cylinder or pipeline) to ensure safe setup.
Outlet pressure – Define the controlled delivery pressure range required for your application.
Flow rate – Ensure the regulator can deliver the required gas flow without pressure loss.
Material – Options include chrome-plated brass for general use or stainless steel for high-purity and corrosive gases.
Optional fastening ring – Provides secure mounting and easy installation in fixed configurations, especially when space is limited and a compact design is preferred.
Connection – Verify the out- and inlet fittings to guarantee compatibility with your system.

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