Refrigeration
HVACR Tech Tip: Using Bi-Directional Solenoid Valves for Heat Pumps
A solenoid valve with a built-in check valve is designed to replace a liquid line solenoid valve in parallel with a check valve for reverse flow. This valve may be applied in the liquid line of...
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HVACR Tech Tip: Principles of Thermostatic Expansion Valves
In order to understand the principles of thermostatic expansion valve operation, a review of its major components is necessary. A sensing bulb is connected to the TEV by a length of capillary tubing...
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HVACR Tech Tip: When Should a Catch-All Filter-Drier be Changed?
It is important to locate a filter-drier in a refrigeration system. Its role is to remove moisture from the refrigerant and lubricant by absorbing and retaining moisture deep within the...
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HVACR Tech Tip: 12 Solutions for Fixing Common TEV Problems
When responding to a refrigeration service call at a supermarket, the refrigeration technician immediately plays “problem percentages” upon entering the store. Most refrigeration equipment breakdowns...
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HVACR Tech Tip: Troubleshooting Solenoid Valves in Refrigeration Applications
​To ensure peak performance, solenoid valves must be selected and applied correctly; however, proper installation procedures are equally important. Aside from correct installation, troubleshooting the...
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HVACR Tech Tip: Can You Have Subcooled Refrigerant in the Receiver?
We all know that a properly charged refrigeration system utilizing a receiver must have a liquid and vapor interface in the receiver. And we also know that saturated pressure and temperature...
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HVACR Tech Tip: Where Should the TEV External Equalizer Be Installed?
In air conditioning and refrigeration applications, the ability of the thermostatic expansion valve (TEV) to match refrigerant flow to the rate at which refrigerant can be vaporized in the...
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HVACR Tech Tip: Refrigerant Piping Expansion and Contraction
All refrigeration piping materials are subject to changes in temperature and will expand and contract with temperature change. Installation techniques must allow for expansion and contraction changes,...
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HVACR Tech Tip: Guide to Servicing Blended Refrigerants
Parker's HVACR Tech tips cover service tips for the HVACR technician servicing commercial refrigeration systems as well as  HVAC  for both commercial and home. The following are service tips for...
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Compressor Overheating is the Number One Refrigeration Problem
Many refrigeration compressors break down simply because they overheat. There are two main reasons why overheating can have such a devastating effect on compressors: Loss of the lubricating properties...
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Six Reasons Why CDS Conversion Reduces Costs
Have you considered a CDS valve conversion for improving performance and reducing costs on your refrigeration equipment? Over the past ten years, Parker Sporlan has completed tens of thousands of...
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Head Pressure Control for Supermarkets
Head pressure control on supermarket refrigeration systems is used to maintain a minimum high-side-pressure to low-side-pressure relationship. Low side pressures are the result of...
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Using P-T Analysis as a Service Tool for Refrigeration Systems
Manufacturers of refrigerants, controls, and other suppliers distribute hundreds of thousands of pressure-temperature charts to the trade every year. It would be rare indeed to find a...
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Climate Control Technologies and Key Markets
Climate control is the technology of controlling fluids and gases to vary temperature. Parker provides comfort, convenience and control through refrigeration and air conditioning.   Key markets Air...
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