(Valve Actuators and Positioners)
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Since the introduction of PVC in the U.S. during the 1940's, thermoplastic valves, pipe and fittings have gained wide acceptance. They are often the material of choice for systems that were... (View Full Article)
(Valves)
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Because a butterfly valve uses a disc to control flow, much like a damper in a duct system, some people occasionally want to use it to control the flow of compressed air and other gases, or for vacuum... (View Full Article)
(Filtration and Separation Products)
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The following formulas are based on turbulent flow of a Newtonian fluid through an outlet (orifice) in a tank. The discharge coefficient depends on the configuration of the outlet.... (View Full Article)
(Chemicals and Raw Materials)
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The data in the following tables were obtained from numerous sources in the industry. The information is based primarily on the immersion of unstressed strips in the chemicals at ambient temperature... (View Full Article)
(Filtration and Separation Products)
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This chart shows conversion factors for liquid measure and weight, pressure and head, and area and volume.... (View Full Article)
(Valves)
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For your Hayward plastic bag filter to perform the way you expect it to, you have to select the right filter bag. After all, it's the bag that does the actual filtering, not the vessel itself. Hayward... (View Full Article)
(Filtration and Separation Products)
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Extensive experimentation has shown that, in general, for a give flow passage and completely turbulent flow the relationship between fluid flow rate and pressure drop follows a power law.... (View Full Article)
(Valves)
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Flow velocity is the speed at which the process media is flowing through the pipe. It is expressed in feet per second. High flow velocities in themselves may not be dangerous, however, the shock... (View Full Article)
(Filtration and Separation Products)
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The following formulas are for calculating the rate at which a fluid will flow from a tank when the fluid level is maintained constant (h is constant). The discharge coefficient Cd depends on the... (View Full Article)
(Filtration and Separation Products)
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Pressure regulators can be selected based on the size of the pipe in the system. But they're not like on/off valves, more is involved. Sizing a pressure regulator is a bit more difficult than sizing... (View Full Article)
(Valves)
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Don't make the mistake of trying to pick the right relief valve for your application based on just the size of the pipe in the system or the set pressure. Do it this way and you are almost guaranteed... (View Full Article)
(Valves)
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Many times people with a metal piping system are attracted to a plastic valve or strainer because of its low cost compared to a stainless steel or bronze one. And also for all of the benefits plastic... (View Full Article)
(Filtration and Separation Products)
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In many applications plastic pipe, valves and fittings can be a viable replacement for metal. Recent estimates show that about 25% of the expenditures for metal pipe, valves and fittings could be... (View Full Article)
(Valves)
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Pipe is one of the more common types of plastic product we are familiar with. Pipe is produced by an extrusion process. Basically extrusion can be defined as forcing a material through a die orifice.... (View Full Article)
(Valves)
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Sodium hypochlorite possesses some unique qualities that have to be understood if you are going to be able to select a valve for that type of service. Because of their excellent chemical resistance,... (View Full Article)
(Valves)
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The standard manual three-way valve is usually installed so that the bottom port â Câ is the common port. Turning the handle 90 degrees diverts the flow to the right, port â Aâ or to the left, port â... (View Full Article)
(Valves)
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Wafer style is the more common of the two and is less expensive than the lug style. The wafer style butterfly valve is just about the standard. It ís so common that no one even bothers to use the... (View Full Article)
(Valves)
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This chart shows the typical minimum physical properties for Hayward Industrial Products, Inc.... (View Full Article)
(Filtration and Separation Products)
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Basket strainers and Y-Strainers each have design parameters that will affect their success in specific applications. Taking a little time to identify application specifics will ensure that you select... (View Full Article)