Pneumatic directional control valves and cylinders are most commonly used in power circuits, with the valves controlling cylinders that, in turn, provide work. As we learn about a few of these circuits, other accessory valves will be introduced, along with some interesting ways of using them.

Pump cavitation is defined as the phenomenon of formation and consequent implosion of vapor bubbles in a region where the pressure of the liquid falls below its vapor pressure. Cavitation can occur in any fluid handling equipment, especially in pumps, one of the most important components of industry today. Technological advances in industrial protective coatings and repair composite materials have made it possible to repair pumps suffering from cavitation rather than simply replacing them.

First of all, despite the fact that the PLC was designed as a direct replacement for relays, its logic is actually quite different. Relays are 100% parallel logic. Every single part of a relay control system operates simultaneously. If you were to draw several rungs on a relay diagram and put one coil on each line with no contacts on any of the lines, every relay would energize at the same time when power was applied. This makes relay logic blindingly fast by nature (its only the relay’s mechanical limitations that make it slow) but it’s often a source of trouble

There are 3 major problems associated with poor pump piping. 1) There is a scarcity of accessible information available on the topic. 2) No one pays any attention to it when installing a pump. 3) It can remain undetected and cause repetitive pump failures for many years.

The development of the electric motor has given us the most efficient and effective means to do work known to man. The electric motor is a simple device in principle. It converts electric energy into mechanical energy. Over the years, electric motors have changed substantially in design, however the basic principles have remained the same. In this section of the Action Guide we will discuss these basic motor principles. We will discuss the phenomena of magnetism, AC current and basic motor operation.

The fact of the matter is that there are three types of problems mostly encountered with centrifugal pumps: design errors, poor operation, poor maintenance practices. The present article is being presented in 3 parts: covering all aspects of operation, maintenance, and troubleshooting of centrifugal pumps.

Many people operate rotary screw compressors with oil seeping from around the shaft. This housekeeping nuisance and waste of expensive oil can be avoided with a better understanding of the shaft seal. The mechanical seal and lip seal are the most common types of shaft seals used on Rotary Screw compressors. The following provides further information specific to each of these styles.

Air systems without compressed air dryers severely restrict the life expectancy of any equipment they operate. You must keep your compressed air dry. One of the most effective ways of drying compressed air is to cool it, collect the moisture that condenses, then reheat the air to the ambient temperature. That is exactly what the cool winter weather did for your compressed air system.

Is there is reason to suppose a properly repaired motor is less reliable than a new machine? This article will define reliability and repairability to help you answer this question.