Superheat is the temperature of refrigerant gas above its saturated vapor (dewpoint) temperature. Superheat as it relates to thermostatic expansion valves, can be broken down into three Superheat...

In 2017, many changes impacted the HVACR, HVAC climate control industry. New technologies emerged that changed the way we do business – most for the better! But they also brought a shift in the way we...

2017 marked Parker Hannifin's Centennial year in business. It all started back in March of 1917, in a machine shop which built pneumatic brake systems for trucks, trains, buses and...

Each summer, Parker engineering and business development experts from around the world gather at the company’s headquarters in Cleveland, Ohio to showcase their group’s portfolio of innovative new...

The HVACR service technician uses an array of tools and test instruments to diagnose problems and evaluate system performance. One tool that is readily available, inexpensive and yet rarely used to...

The Suction Line Filter-Drier method of cleaning up a system after a hermetic motor burnout is favored by service technicians and recommended by manufacturers throughout the HVAC and...

A common problem facing refrigeration and air conditioning service technicians and contractors is that of superheat hunting by thermostatic expansion valves (TEVs). Here is a better understanding of a...

This is the third part of a three-part series of posts on high-glide refrigerants for refrigeration system retrofits. Part 1 covered calculating super-heat and subcooling with glide, and control of...

This is the second part of a three-part blog series on high-glide refrigerants for refrigeration system retrofits. Part 1 covered calculating superheat and subcooling with glide, and control...

Refrigerant choices for refrigeration systems are undergoing significant change, including choices for retrofits and new systems. This article is Part 1 of a 3 part series addressing such retrofits,...

What if you are only given 3 measurements? As HVACR technicians, you need some ideas in your back pocket for basic troubleshooting in a refrigeration system. How about a simple chart that helps you...

Below are six questions that will help you learn most of what you need to know about flooded head pressure control.   1. Why do you need a receiver? The flooded head pressure control valve maintains...

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...

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...

When designing a system using stepper motor style electric valves, such as CDS or SDR valves and A8-to-CDS conversion kits, in head pressure control applications additional precautions and...

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...

With more and more supermarkets upgrading from mechanical valves to the superior performance of CDS valves, knowing how to install a Sporlan CDS Conversion Kit will help save considerable time...

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...

With our recent introduction of the Smart Service Tool Kit, there have been many questions asked and answered. Let's review the ones pertaining to buying and general details here:   Q1: When will the...

​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...