Refrigeration Pressure Gauges

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Brief Description

Refrigeration Pressure Gauges are specialized compound gauges designed for critical monitoring of pressure and corresponding saturation temperatures within commercial and industrial cooling and freezing systems.

In-depth Overview

These gauges are instantly recognizable by their specialized dials, which display both pressure (in psi/bar) and several inner rings corresponding to the saturation temperatures (R134a, R410a, etc.). This allows HVAC/R technicians to easily determine the superheat or subcooling of the system. They are typically compound gauges, measuring both vacuum (for system evacuation) and positive pressure (for charging and operation). For enhanced durability against the constant vibration of compressors, they are often glycerin-filled and feature robust brass or stainless steel components.

Specification

Parameter	Details
Gauge Type	Compound (Pressure and Vacuum)
Refrigerant Scales	R134a, R404a, R410a, R22 (multiple scales)
Pressure Range	−1 bar (vacuum) up to 35 bar or 500 psi
Case Material	Black Steel, Chrome Plated, or Stainless Steel
Case Filling	Glycerin (standard), Dry (optional)
Connection Size	1/8′′ or 1/4′′ NPT or SAE Flare
Accuracy Class	Class 1.6 or 1.0
Application	Manifold Sets, Chillers, Refrigeration Units

Applications

Commercial Freezers and Coolers: Monitoring system pressures for performance verification.
HVAC Technicians' Manifolds: Essential tools for charging, evacuating, and troubleshooting air conditioning units.
Industrial Chiller Plants: Installed on compressors, condensers, and evaporators for continuous monitoring.
Automotive AC Systems: Used in service equipment to ensure correct refrigerant levels.

Key Advantages

Dual Functionality: Provides both pressure and corresponding saturation temperature readings on a single dial.
Vibration Dampening: Liquid filling protects the mechanism from compressor pulsations, ensuring stable readings.
System Evacuation: Capable of accurately measuring the deep vacuum required before refrigerant charging.
Rapid Diagnostics: Color-coded temperature scales allow for fast identification of system faults (e.g., non-condensables).

Payment and Shipping

We accept major international payment methods including T/T and Western Union. Standard refrigeration gauges are typically stock items, offering competitive pricing and quick shipping, often within 5−7 days. We ensure the gauges, especially those destined for manifold sets, are packaged securely in molded foam inserts to protect the sensitive pointer and glass from movement damage.

Frequently Asked Questions

Q: What is the purpose of the vacuum scale on the gauge?
A: The vacuum scale is essential for the evacuation phase. Before charging a refrigeration system, a vacuum pump is used to pull a deep vacuum (below 0 psi) to remove all non-condensable gases and moisture. The compound gauge confirms the successful pull-down.

Q: Why are there different colors for the temperature rings?
A: The colored rings often correspond to the different refrigerant types listed on the dial (R410a, R22, etc.). This color coding helps the technician quickly identify which temperature scale relates to the refrigerant currently in use, minimizing reading errors.

Q: Does the glycerine filling interfere with the reading?
A: No, the liquid filling is used purely for dampening the pointer movement under vibration. It fills the void within the case and does not contact the Bourdon tube or affect the pressure measurement itself.

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Refrigeration Pressure Gauges Manufacturers

Wuxi Huihua Special Instrumentation Co., Ltd. was established in December 2001, the registered capital is 5 million yuan, the existing staff of more than 50 small and medium-sized joint-stock enterprises.
The company specialises in the production of various types of special instruments, alternative to the localisation of imported instruments.To seismic pressure gauge, seismic electric contact pressure gauge, stainless steel pressure gauge, diaphragm corrosion-resistant pressure gauge, marine pressure gauge and other series as the main products. On the basis of field instruments, we have developed various kinds of pressure transmitters, pressure controllers, digital pressure gauges and so on. There are more than 30 series and 3000 specifications. Products are widely used in petroleum, chemical, paper, metallurgy, mining, chemical fibre, electric power, food, environmental protection, rubber and plastic, hydraulics and many other industries, and more than 2,000 domestic customers to establish a friendly relationship with the national large and medium-sized enterprises to establish a good partnership, won the majority of users praise, and set up a corporate brand image.