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  • What, How, Where & Why of CHECK VALVES
    valves) typically come in. undesirable. Examples of such applications would. two types; one that requires reverse pressure/flow to. be to protect against two incompatible solutions from. assure the valve seals or “checks,” and one that does. mixing, as in a manifold, or “checking” against
  • Fail-Safe Valves
    common, but are equally important. These are often found in cooling systems, or are used where flow is shut off only for periodic maintenance, etc. Some valves, such as spring-loaded air actuated ball valves, can be converted between types.The illustration below shows two air-actuated shut-off
  • Medical Device Link . Spotlight on Valves
    connections while guarding the integrity of instrument electronics. NResearch Inc., 267 Fairfield Ave., West Caldwell, NJ 07006. Two-way solenoid valves Two-way solenoid valves offer flows up to 50% greater than the manufacturer's standard Series 6 valves. The two-way valves with 3/8-in. NPT ports
  • How to Select a Pressure Relief Valve
    pressure. Do it this way and you are almost guaranteed to be spending time trying to figure out why the valve is not doing what it is supposed to do. The first thing to determine is the type of pressure relief valve you are looking for. There are two common types of relief valves. One is the safety
  • Medical Device Link . Spotlight on Pumps and Valves
    to the manufacturer. The multidirectional flow control system permits the use of two- and three-way isolation valves and micropumps on the same manifold. The product is designed to handle high-quality or aggressive chemicals. Bio-Chem Valve Inc., Boonton, NJ, USA. Latex-free check valves Latex-free
  • Valve Pressure Loss & Flow - Q&A and Equations
    , there are no industry-wide standard pressures for valve sizes; no two manufacturers design a 2" valve the same way, and different designs have different pressure considerations. Outlet pressure, for example, is critical to solenoid valves but frequently overlooked. If downstream pressure
  • Are You Taking Full Advantage of Pneumatic Valve Technology? (.pdf)
    solenoids. control cabinets are reduced to simple. and ultimately ended up with plug-into-the-base. connections. Now, two cables — one. electronics allowing for a single multi-pin connector. communication and one power — can handle. or fieldbus installation. Today’s valves are smaller
  • Improving Campus Chilled Water Systems with Intelligent Control Valves: A Field Study
    , and to quantify the improvements achieved. The flow control devices de-. ployed, five at MIT and six at UCB, are novel two-way exponential (equal-percentage). control valves mated with a magnetic flow meter, temperature sensors in both waterside. supply and return lines, and several microprocessors, that can
  • How Some Supervisory and Leakage Currents Can Affect Today's Low-Power Solenoid Valves
    generate a high enough leakage or supervisory current to inadvertently. affect valve operation. 4. Affected electronical y enhanced valves. Besides low-power valves, two recent types of electronically enhanced solenoid valves. can also encounter these problems. A few models include options
  • 5 Most Common Mistakes When Specifying Valves
    to the return tank and therefore does not maintain any pressure upstream. Solenoid valves are often misapplied as well. Generally, a solenoid valve is required to default to a desired position, referred to as fail-safe, upon loss of power. In the case of a two-way valve, either closed or open, or a three-way

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