{"id":1479,"date":"2021-12-09T18:48:25","date_gmt":"2021-12-09T17:48:25","guid":{"rendered":"http:\/\/www.fr-eps.com\/EN\/?page_id=1479"},"modified":"2023-04-18T11:02:03","modified_gmt":"2023-04-18T10:02:03","slug":"valve-automation-guide","status":"publish","type":"page","link":"https:\/\/www.fr-eps.com\/EN\/valve-automation-guide\/","title":{"rendered":"Valve Automation Guide"},"content":{"rendered":"\n<figure class=\"wp-block-gallery columns-2 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"410\" src=\"http:\/\/www.fr-eps.com\/EN\/wp-content\/uploads\/2021\/12\/Valve-Automation-EPS-3.jpg\" alt=\"Valve Automation EPS 3\" data-id=\"1447\" data-full-url=\"http:\/\/www.fr-eps.com\/EN\/wp-content\/uploads\/2021\/12\/Valve-Automation-EPS-3.jpg\" data-link=\"http:\/\/www.fr-eps.com\/EN\/valve-automation-eps-3\/\" class=\"wp-image-1447\" srcset=\"https:\/\/www.fr-eps.com\/EN\/wp-content\/uploads\/2021\/12\/Valve-Automation-EPS-3.jpg 640w, https:\/\/www.fr-eps.com\/EN\/wp-content\/uploads\/2021\/12\/Valve-Automation-EPS-3-300x192.jpg 300w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"414\" src=\"http:\/\/www.fr-eps.com\/EN\/wp-content\/uploads\/2021\/12\/Valve-Automation-EPS-2.jpg\" alt=\"Valve Automation EPS 2\" data-id=\"1448\" data-full-url=\"http:\/\/www.fr-eps.com\/EN\/wp-content\/uploads\/2021\/12\/Valve-Automation-EPS-2.jpg\" data-link=\"http:\/\/www.fr-eps.com\/EN\/valve-automation-eps-2\/\" class=\"wp-image-1448\" srcset=\"https:\/\/www.fr-eps.com\/EN\/wp-content\/uploads\/2021\/12\/Valve-Automation-EPS-2.jpg 640w, https:\/\/www.fr-eps.com\/EN\/wp-content\/uploads\/2021\/12\/Valve-Automation-EPS-2-300x194.jpg 300w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/figure><\/li><\/ul><\/figure>\n\n\n<p><strong><span style=\"color: #eb5c24;\">1. What is an automated Valve?<\/span><\/strong><\/p>\n<p>Valves which are operated without any manual efforts are automated valves. Automated valves can be actuated with the help of Pneumatics, hydraulics, electrically or with a combination of these.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">2. What is a general arrangement of automated Valves?<\/span><\/strong><\/p>\n<p>Typically, Automated valve comprises of Actuator, Valve, Mounting arrangement, power transmission element and an option to manually override the actuator operation.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">3. How is the size and capacity of the actuator determined?<\/span><\/strong><\/p>\n<p>Capacity of the actuator is totally depends on two parameters:<span class=\"Apple-converted-space\"><br><\/span>&#8211; Size of the Valve<br>&#8211; Quantum of force actuator is able exert<br>in case of rotary actuation this force is called as torque and in case of linear actuation same is called as thrust.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">4. What is a positioner?<\/span><\/strong><\/p>\n<p>Positioners are used to give commands to control the valves for opening, closing or to maintain any intermediate position.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">5. How are automated valves classified?<\/span><\/strong><\/p>\n<p>Automated valve can be classified based on there actuation method. There are many ways to actuate a valve however generally used methods are listed below.<br><strong>Pneumatic<\/strong> \u2013Valves which are operated using Air or gas pressure are called Pneumatic valves. In case of linear valve \u2013 air pressure acts on the obturator creating linear pressure and in case of rotary valve air pressure generates torque to provide rotary motion. Availability of compressed air on the site is the most important factor while going for pneumatically actuated valves.<br><strong>Electric<\/strong> \u2013 In case of electrically actuated valves electric motors are used, here availability of electricity at the site becomes major deciding factor.<br><strong>Hydraulic<\/strong> \u2013 Hydraulic actuators use fluid pressure to actuate the valve. In case of linear valve, fluid pressure acts on a piston providing a linear thrust. In case of rotary valve it provides the torque for rotary motion.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">6. Can I operate Gate \/ Globe \/ Check valves in automated condition?<\/span><\/strong><\/p>\n<p>Gate and Globe valves can be easily automated, whereas Check valve cannot be automated, since it is a self-operated valve.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">7. What is a Solenoid Valve and how does it work?<\/span><\/strong><\/p>\n<p>Solenoid valve is an electrically operated valve, which operates using an electromagnetic solenoid coil to change the state of a valve i.e. from open to closed, or close to open.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">8. Explain the different technologies of solenoid valves?<\/span><\/strong><\/p>\n<p>There are 2 main different technologies:<br><strong>Direct-acting <\/strong>valves require no differential pressure to remain in their rest state. In NC valves, they will only allow to flow media if energized. These valves are very robust and can be used in a process line for safety purposes. They can also be used on the outlet of a tank where sometimes pressure can get very low but the valve needs to remain open.<br><strong>In-direct acting<\/strong> valves require a differential pressure across the inlet and outlet to allow them to stay in their rest state. For example, if a valve is normally open and there is no enough differential pressure, the valve may possibly close if inlet pressure dropped too low. These valves should only be used if pressure levels are within the parameters specified in the datasheet and IOM instructions.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">9. What is a Valve Positioner?<\/span><\/strong><\/p>\n<p>Valve positioners are sensing devices, which compare valve actuator\u2019s position to the control signal received by them. If valve actuators position differs from control signal, it moves the actuator to achieve required position. Valve positioners are installed if the valve is intended to be used where accurate and rapid control is required in the application.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">10. Where to Use Valve Positioner?<\/span><\/strong><\/p>\n<p>When accurate valve positioning is required.<br>To speed up the valve response, as the positioner uses higher pressure and greater air flow to adjust the valve position.<br>To increase the pressure that a particular actuator and valve can close against. (To act as an amplifier).<br>Where friction in the valve (especially the packing) would cause unacceptable hysteresis.<br>To linearise a non-linear actuator.<br>Where varying differential pressures within the fluid would cause the plug position to vary.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">11. What is a Limit switch box?<\/span><\/strong><\/p>\n<p>A limit switch box is used to house switches\/sensors which gives electrical indication of the valve position to the controller. It can also give visual indication of the valve position.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">12. What is a Limit switch?<\/span><\/strong><\/p>\n<p>A limit switch is an electromechanical\/electronic device that monitors and indicates whether the movement limits of a valve have been exceeded. A solenoid valve can be directly turned on or off by using a limit switch.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">13. What is an Air filter regulator?<\/span><\/strong><\/p>\n<p>Air filter regulators are used to remove moisture and particulate matter from compressed air. These are \u2018mechanical filters\u2019 and do not remove oil vapours or chemical contaminants in vapor form.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">14. How does an Air Filter Regulator work?<\/span><\/strong><\/p>\n<p>In an air filter regulator, the supply air enters the inlet port and passes through the filtering element. The filtering element removes moisture and small particulate matter. A bowl is present for the accumulation of moisture and the drain cock allows purging of the unit. The filtering element needs to be cleaned regularly.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">15. What is a Manual override (MOR)?<\/span><\/strong><\/p>\n<p>Manual override, is a mechanical device which allows manual operation of automatic valves, when electric power or air pressure is lost.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">16. What is a Quick Exhaust Valve?<\/span><\/strong><\/p>\n<p>A Quick Exhaust Valve is a valve with a big exhaust orifice and fitted directly on the cylinder or actuator. The purpose of a Quick Exhaust Valve is to evacuate air from the actuator quickly.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">17. What Is a Flow Control Valve?<\/span><\/strong><\/p>\n<p>Flow Control Valves are used to regulate the flow of air, in a pneumatic system. Accurate control can be achieved by a very small change in the differential pressure of the valve.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">18. What is a Junction Box?<\/span><\/strong><\/p>\n<p>A junction box is an enclosure that protects a connection (the junction) of two or more wires carrying electrical current. This level of protection is needed to prevent fires and to maintain solid, reliable connections that stay tight over many years.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">19. What Is an I \/ P Converter?<\/span><\/strong><\/p>\n<p>A current to pressure (I\/P) converter, is a device which converts an electrical signal from a control system, to a corresponding pneumatic signal.<\/p>\n<p><strong><span style=\"color: #eb5c24;\">20. What is an Air Lock Relay?<\/span><\/strong><\/p>\n<p>Air lock relay is a unit for maintaining the air pressure in diaphragm chamber. When air pressure falls below the pre-set value, the air lock relay blocks or holds the existing air pressure till the air supply is restored.<\/p>","protected":false},"excerpt":{"rendered":"<p>E.P.&#038;S.<\/p>\n","protected":false},"author":1,"featured_media":1450,"parent":0,"menu_order":10,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"tags":[186,185,93,174,94,131,172,97,99,175,101,184,107],"class_list":["post-1479","page","type-page","status-publish","has-post-thumbnail","hentry","tag-africa","tag-angola","tag-cameroon","tag-chad","tag-congo","tag-control-valve","tag-equatorial-guinea","tag-gabon","tag-ghana","tag-guinea-conakry","tag-ivory-coast","tag-niger","tag-senegal"],"_links":{"self":[{"href":"https:\/\/www.fr-eps.com\/EN\/wp-json\/wp\/v2\/pages\/1479"}],"collection":[{"href":"https:\/\/www.fr-eps.com\/EN\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.fr-eps.com\/EN\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.fr-eps.com\/EN\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fr-eps.com\/EN\/wp-json\/wp\/v2\/comments?post=1479"}],"version-history":[{"count":6,"href":"https:\/\/www.fr-eps.com\/EN\/wp-json\/wp\/v2\/pages\/1479\/revisions"}],"predecessor-version":[{"id":1605,"href":"https:\/\/www.fr-eps.com\/EN\/wp-json\/wp\/v2\/pages\/1479\/revisions\/1605"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fr-eps.com\/EN\/wp-json\/wp\/v2\/media\/1450"}],"wp:attachment":[{"href":"https:\/\/www.fr-eps.com\/EN\/wp-json\/wp\/v2\/media?parent=1479"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fr-eps.com\/EN\/wp-json\/wp\/v2\/tags?post=1479"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}