A device used to control the flow of air or gases.

A product, material or substance that meets any one of three criteria: 1) undergoes vigorous polymerization, decomposition or condensation, 2) becomes self-reactive under conditions of shock, or increase in pressure or temperature, 3) reacts vigorously with water to release a highly toxic gas.

A collection of data arranged for ease and speed of search and retrieval.

A component used for removing dissolved oxygen or other noncondensables in boiler feed water.

The process of removing the bark from the logs to facilitate further processing.

A device that removes moisture from the air.

The removal of moisture from air, stored goods, or refrigerant.

Removal of all ionisable salts using an ion exchange system

The number below the line in a common fraction. If one is divided by five (1/5), then 5 is the denominator.

Any absorbent or adsorbent, liquid or solid, that will remove water or water vapour from a material. In a refrigeration circuit, the desiccant should be insoluble in the refrigerant.

The temperature at which the water vapour in the air is saturated; the temperature at which water vapour begins to condense out of the air.

A thin flexible plate held in place in a capsule in such a way that when pressure is applied to one side, the plate will bulge outward.

A pump in which a flexible diaphragm, generally of rubber or equally flexible material, is the operating part. When the diaphragm is raised suction is exerted, and when it is depress, the liquid is forced through a discharge valve.

An increasing cross-sectional area that is designed to convert high-speed fluid flow into low-speed flow at an increased pressure.

A vessel used to cook the wood and chemicals to break down the lignin that binds the cellulose fibres together.