How High-Precision Pressure Regulators Can Achieve Stability in Variable Environments
Pressure regulators are devices that maintain a constant output pressure regardless of changes in the input pressure or flow rate. They are widely used in various applications that require precise and stable control of pressure, such as medical devices, air gauging, semiconductor fabrication, and fuel dispensing.
However, not all pressure regulators are created equal. Some pressure regulators may have drawbacks such as bleed to atmosphere, zero pressure output drift, or poor repeatability. These issues can compromise the accuracy and reliability of the pressure regulation, and lead to inefficiencies, errors, or safety hazards.
To overcome these challenges, a high-precision pressure regulator is needed. A high-precision pressure regulator is a type of pressure regulator that offers the highest level of regulation accuracy and repeatability available, and eliminates bleed to atmosphere and zero pressure output drift. A high-precision pressure regulator can provide consistent and accurate pressure control under variable operating conditions, such as changes in temperature, humidity, or altitude.
One example of a high-precision pressure regulator is the TESCOM™ 44-6800 Series Vaporizing Regulator, which is designed for gas chromatography applications. This regulator features a unique, dual proportional valve design that ensures the delivery of single-phase vapor samples required for accurate analytical results. It also has a certified separability of the regulator body from the electronic enclosure, which allows for greater installation flexibility and safety.
Another example of a high-precision pressure regulator is the Kelly Pneumatics Precision Pressure Regulator, which is designed for air and gases. This regulator features a patented, dual proportional valve design that eliminates bleed to atmosphere and offers true zero pressure output when deactivated. It also has a high-resolution control knob that allows for fine adjustment of the output pressure.
The following table compares some of the features and specifications of these two high-precision pressure regulators:
| Feature/Specification | TESCOM™ 44-6800 Series Vaporizing Regulator | Kelly Pneumatics Precision Pressure Regulator |
|---|---|---|
| Media | Gas | Air and Gas |
| Inlet Pressure | Up to 414 bar (6000 psig) | Up to 10.3 bar (150 psig) |
| Outlet Pressure | 0.34 to 6.9 bar (5 to 100 psig) | 0 to 6.9 bar (0 to 100 psig) |
| Flow Capacity | Up to 0.5 SLPM | Up to 56.6 SLPM |
| Accuracy | ±1% of full scale | ±0.25% of full scale |
| Repeatability | ±0.15% of full scale | ±0.1% of full scale |
| Temperature Range | -40°C to +85°C (-40°F to +185°F) | -10°C to +60°C (14°F to 140°F) |
| Bleed Rate | None | None |
| Zero Pressure Output | Stable | Stable |
| Power Supply | 24 VDC | 12 to 24 VDC |
| Control Signal | 4 to 20 mA or 0 to 10 VDC | 0 to 10 VDC or 4 to 20 mA |
| Response Time | < 100 ms | < 50 ms |
| Dimensions | 152 x 102 x 76 mm (6 x 4 x 3 in) | 76 x 51 x 25 mm (3 x 2 x 1 in) |
| Weight | 1.8 kg (4 lb) | 0.23 kg (0.5 lb) |
As can be seen from the table, both high-precision pressure regulators offer excellent performance and features, but they differ in some aspects, such as media, flow capacity, accuracy, and dimensions. Depending on the specific application and requirements, one of these regulators may be more suitable than the other.
In conclusion, high-precision pressure regulators are devices that offer stability under variable conditions, and can improve the quality and efficiency of various processes that require accurate and consistent pressure control. By choosing the right high-precision pressure regulator for the application, users can benefit from the advantages of this technology and avoid the drawbacks of conventional pressure regulators.
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