This article is all about valves, and the various types of valves and fittings available. Valves are mechanical or electro-mechanical devices that are used to control the movement of liquids, gases, powders, etc. through pipes or tubes, or from tanks or other containers. In most instances, valves rely on some form of mechanical barrier—a plate, a ball, a diaphragm, for example—that can be inserted and removed from the flow stream of the material passing by. Some valves are designed as on-off varieties, while others allow very fine control of the passage of media.
Aerosol Valves are used for dispensing the contents of aerosol cans. They consist of two primary components, the housing and the stem. Key specifications include the intended application, actuator type, output type, valve size, and materials of construction. Media dispensed can be a consideration as well. Aersol dispenses liquids, creams and ointments, gases, cleaning agents, and any other product that is packaged in an aerosol can.
Different types of valves we use in boiler room here are some example.
- Ball valve
- Gate valve
- Globe valve
- Check valve
Check Valve types permit fluid to flow through them in one direction only. Lift-type check valves are similarly constructed as globe valves and use a ball or piston, often backed by a spring that opens under a specified pressure but closes as the pressure decreases, thus preventing backflow. These valves are often suited for high-pressure applications. A variant is the stop check valve which doubles as a shut-off valve.
Swing check valves employ hinged gates, disc wafers, or wafers that are often spring-actuated to close against ports as pressure diminishes. These devices can be effective in low-pressure applications. A tilting disc check valve varies the theme somewhat by hinging the gate slightly inward to reduce the pressure required for opening. Butterfly or double door check valves use two half-circle gates or wafers that are hinged at the centerline of the valve port and open downstream in the direction of flow.
Rubber check valves are also available and include designs such as the flap and duckbill varieties. Check valves are used on gas lines, for air service, and with pumps—anywhere that fluid needs to move in a single direction. They can be miniaturized, manufactured in plastic, and may incorporate many special features such as a metal seat.
Ever heard of Car maintenance, AC maintenance, House Maintenance, etc.
Every living and nonliving thing requires some kind of maintenance.
Why do we tend to ignore the most precious living thing – our Body and don't think of Body Maintenance?
Why is the message ‘excel not working’ displayed?The error message ‘excel not responding’ is usually displayed due to the following reasons.
When you have not installed the latest Excel application or the updatesYour Excel application may be used by another processPre-installed add-ins may be interfering with your Excel application, thereby preventing it from working properlyThere could be some issue with your MS Office programOutdated antivirus software could sometimes be the issueEffective ways for fixing the ‘Excel not working issueHere is a set of comprehensive solutions you can try to fix the ‘Excel not working issue.Install the latest version of Microsoft OfficeIf you have not upgraded to the latest Office and Windows Updates, then the error message can show up.
You can do this following this simple step.Control Panel>System and Maintenance>Maintenance>Automatic MaintenanceSave the Excel file in Safe ModeFor resolving the issue, you can open the Excel file in Safe Mode.
When you run the Excel file in safe mode, it bypasses all the settings and functionality such as add-ins, changed toolbars, and alternative startup locations.
You can open the file in safe mode by pressing and holding the Ctrl button while you start the program.
You can also do it by using the safety switch in Command Prompt.Make sure the excel file is not in use by another processIf an Excel file is in use by another process, then you could sometimes be displayed an ‘Excel not working’ message.
