Archive for the ‘Articles’ Category

Chemical Delivery Systems


Types Of Chemical Delivery

Getting the cleaning chemical to the surface to be cleaned requires the chemical solution either be sprayed on the surface separately or delivered along with the water spray from the cleaning system. Most high-pressure cleaners allow for automatic delivery of chemicals through the system. (more…)

Flow Switches


Introduction To The Flow Switch

The flow switch is a safety device, which prevents burner firing when water flow is interrupted. The switch body is plumbed into the fluid system so that water flows through it when the system is operating and the trigger gun valve is open. (more…)

Oil Burner Troubleshooting


Troubleshooting for an oil burner to operate, it must have three things: Fuel, air and ignition spark. Burner problem analysis focuses on determining which of these three critical elements are missing and why. (more…)

Pressure Relief Valves


Protection Against Excessive Pressure

The pressure relief or pop-off valve is a simple pressure-relieving safety device. When system pressure reaches a predetermined point, the valve opens and releases water from the system to the atmosphere. The pressure relief valve functions as sort of a circuit breaker for water. (more…)



Introduction To Electricity
Many system controls are for incorporate electrical switches. To fully understand their action, you need to understand how electricity works and how to test circuits. It does not take a genius to understand how electricity works. The first step is understanding how electricity is measured. (more…)

Servicing Ceramic Plunger Pumps


Servicing Ceramic Plunger Pumps
The most popular type of ceramic plunger pump today has a one-piece, forged manifold with caps or covers placed for easy check valve access. These pumps often have unitized, easily replaceable valve assemblies as well. However, removing some wearable parts may require a slide hammer or other special tools. (more…)

Oil Burner Testing

Simple Testing Procedures


Simple testing procedures can determine if a burner is adjusted for maximum efficiency. For most oil burners this efficiency is between 65 and 95 percent and can be affected by heat exchanger or coil design as well as by adjustments to the burner. If an oil burner were operating in absolutely ideal conditions, its efficiency would be higher. (more…)

Trigger Gun Service



Trigger Gun Components, Construction And Installation
The trigger gun is centered on the gun body, usually of brass or bronze. This body has several threaded ports, at least four and usually five. (more…)

Diagnostics And Testing Procedures


The Diagnostic Process
When equipment service problems are reported, operators generally describe the symptoms they observe. The reported symptoms are often both severe and vague. Usually, requests for service are not made until the operation of the equipment has become unacceptable: that is, the equipment does not work at all, does not produce sufficient pressure to perform the desired cleaning job, or the boiler will not work and the cleaner is discharging cold water. (more…)

Pressure Hoses And Fittings


The High Pressure Hose

High pressure or steam hose carries the water flow from the pump to the unloader valve and onward to the trigger gun or lance. Hose used to handle fluid under pressure is made up of three components: a tube to contain the fluid, reinforcement to help the tube contain high internal pressure and an outer cover to protect the reinforcement. (more…)