Process plants consist of hundreds, or even thousands, of control loops all networked together to produce a product to be offered for sale. Each of these control loops is designed to keep some important process variable such as pressure, flow, level, temperature, etc. within a required operating range to ensure the quality of the end product. Each of these loops receives and internally creates disturbances that detrimentally affect the process variable, and interaction from other loops in the network provides disturbances that influence the process variable....
Valves are the controlling elements in fluid flow and pressure systems.
Like many other engineering components, they have developed over
some three centuries from primitive arrangements into a wide range of
engineered units satisfying a great variety of industrial needs.
The wide range of valve types available is gratifying to the user
because the probability is high that a valve exists that matches the application.
Availability of fossil fuels became readily and abundantly available
during the mid to latter part of the 20th century, and building
design responded with mechanical and electrical systems that in
many instances consumed the fuel excessively. Large single glazed
areas caused over-heating, glare and solar discomfort in the summer,
combined with cold draughts and high heat losses in the winter.
Thermostatic control was often rudimentary and compensated by
opening and closing windows accordingly.
A Liqui-Mover pump is a positive displacement pressure powered pump with a minimum of moving parts. The pumping action is accomplished using a positive pressure to push the liquid from the pump tank into the return line. The Liqui-Mover pump can handle high temperature and high pressure condensate without difficulty.
Liqui-Mover pumps are available in nine sizes. They are available in many configurations, from individual components that are field assembled to complete packaged systems ready for connection to field piping.