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Pressure Regulators, Vacuum Regulators, Relief Valves & Comparators

R-800 Series Miniature Precision Pressure Regulator – 1/8 NPT Ports

The R-800 series regulators offer high performance in a compact size. 1/8-27 NPT ports allow the use of a wide range of fittings for design flexibility.

R-900 Series Miniature Precision Pressure Regulator – 10-32 Ports

The R-900 Series regulators are designed for applications requiring miniature size, light weight, and precision. 10-32 ports accommodate a wide range of miniature fittings, including Airtrol Components B-062 and B-125 barbed fittings.

V-800 Series Miniature Precision Vacuum Regulator – 1/8 NPT Ports

The V-800 Series vacuum regulators are designed for applications requiring high precision in a miniature package. Hysteresis free adjustments are made through a non-rising stem. Available with an attractive knob, or plain, allowing installation of OEM knobs. Also available is a flush adjusting shaft, and factory pre-set tamper-resistant models. Units may be base mounted or panel mounted.

V-900 Series Miniature Precision Vacuum Regulator – 10-32 Ports

The V-900 Series vacuum regulators are designed for applications requiring high precision in a miniature package. Hysteresis free adjustments are made through a non-rising stem. Available with an attractive knob, or plain, allowing installation of OEM knobs. Also available is a flush adjusting shaft, and factory pre-set tamper-resistant models. Units may be base mounted, panel mounted, or manifold mounted.

F-4103 Series Spring Biased Comparators

Airtrol Components F-4103 Series spring biased comparators are essentially a regulator with an adjustable bias (positive or negative), and a control or pilot input. Standard units offer a 1:1 ratio, plus or minus the initial bias. Special 3:1 and 5:1 ratio units are also available. Perfect for HVAC applications, and unique control applications requiring a positive or negative offset. Non-rising stem is available with an attractive knob, plain (allowing installation of OEM knobs) or flush for “back panel” installations.

4104 Series Pressure & Vacuum Regulators

Airtrol 4104 series pressure and vacuum regulators are designed for applications requiring very low output settings and low flow. Full scale ranges as low as 1.5 psi pressure and 3″ Hg vacuum are available. Settings as low as 1″ WC are easily maintained with both. Both units will also accept a pilot input, allowing pneumatic control of the output setting (see schematics). Hysteresis free adjustments are made through a non-rising stem, available with an attractive knob, plain (to allow the installation of OEM knobs) or flush for “back panel” applications.

Spring Biased Comparator Schematics

RV-5200, RV-5300 Miniature Relief Valve

The RV-5200 and RV-5300 Series operate as either a relief valve or low flow back pressure regulators. Adjustments are made through a non-rising stem available with an attractive knob, plain to allow insulation of OEM knobs, or flush for “back panel” applications. A typical application would be the use of a unit between a compressor and a load to prevent the compressor from “loading up” when dead-ended.

S-5200, S-5300 Miniature Sequence Valve

The S-5200 and S-5300 Series are designed for applications requiring precise sequencing of pneumatic control circuits. Sequencing and deadband characteristics can be tuned by varying the output restriction. Adjustments are made through a non-rising stem, available with an attractive knob, plain to allow the insulation of OEM knobs or flush for “back panel” applications.

An Overview of Air Pressure Regulators

Air pressure regulators are valves designed to automatically limit airflow pressure when it reaches a certain level. By doing so, they minimize the risk of pressure fluctuation to ensure the system maintains consistent air pressure levels. The following article provides an overview of pressure regulators, including what they are, what their function is, types available, selection considerations, and typical applications.

How Does an Air Pressure Regulator Work?

Pressure regulators consist of three primary elements: a pressure-reducing element, a pressure-sensing element (e.g., diaphragm or piston), and a reference force element. In operation, the reference force element prompts the reducing element to open. The air flowing into the valve presses against the sensing element, which then prompts the valve to close when pressure levels reach a set standard.

When used within pneumatic systems, these devices result in the following:

  • Better system operator safety
  • Lower system operating costs
  • Greater consistency in air flows and pressures

Types of Air Pressure Regulators

Air pressure regulators are available in several variations to suit different industrial applications. Some of the most commonly employed include:

  • Generalpurpose regulators are designed for use with pressures above atmospheric pressure. They are typically rated for inlet pressures of 20 bar and outlet pressures of 16 bar, depending on the construction material.
  • Highpressure regulators accommodate inlet pressures above 70 bar.
  • Pilotoperated regulators support air pressure control from a remote location. While they offer greater control capabilities than general-purpose regulators, they generally come with a higher price tag.
  • Precision pressure regulators allow for more precise adjustment of air pressure in applications where a very specific or tight tolerance range of pressure is essential. In some situations, these regulators may require pre-filtering before they can filter pressure.

Selection Considerations for Air Pressure Regulators

When choosing a pressure regulator for a system, there are many factors to keep in mind to ensure the selected regulating device operates as intended. These design considerations include:

Operating Pressure

The first consideration for choosing a pressure regulator is establishing the amount of pressure the component should be able to accommodate at both the input and output ports. For pressures below 1000 psi, a general-purpose regulator may suffice, while pressures above 1000 psi may require the use of a high-pressure regulator.

Flow Requirement

Fluctuations in inlet and outlet flow and pressure affect the flow requirements for a pressure regulator. Pressures and flows that are too high or too low can cause an improperly selected regulator to fail to perform as intended.

Operating Fluid and Environment

The materials employed for the construction of a pressure regulator should be compatible with the fluid media running through the system. For example, acetal polymers are suitable for environments with strong chemicals, aluminum is appropriate for use with oxidizing compounds, and stainless steel is ideal for corrosive materials.

Operating Temperature

The construction materials should also accommodate the operating temperatures of the system. As pneumatic systems can operate at high or low temperatures, the design and construction of the pressure regulator should be planned accordingly in regard to the expected operating conditions. Typical materials used include polysulfone, Buna-N, EPDM, acetal, polyurethane, and stainless steel.

Size and Weight

The size and weight of a pressure regulator depend on the specific application. For example, some advanced applications, such as medical operations, require compact and lightweight units. Modifying both the design (port size, mounting style, etc.) and the construction material helps industry professionals achieve the size and weight they need.

Applications of Air Pressure Regulators

Air pressure regulators find use in many industrial, commercial, and residential applications. Some examples of common equipment and systems they may be found in include:

  • Fuel engines
  • Medical and dental equipment
  • Natural gas furnaces
  • Pneumatic automation systems
  • Propane gas grills

Contact the Pneumatic Component Experts at Airtrol Components Today

At Airtrol Components Inc., we are a leading supplier of high-quality precision miniature pneumatic system components, including air pressure regulators, vacuum regulators, relief valves, and comparators. In addition to our standard product offerings, we provide custom design and modification services to accommodate highly specific needs. For more information about our air pressure regulator or other product solutions, contact us today.