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width=&#8221;1\/2&#8243;][vc_column_text]Sand filtering consists of the physical retention of dirt in holes formed between grains used in the entire filter layer. It is depth filtration, and this characteristic makes it the most effective of all systems. It can be used with highly contaminated water.<\/p>\n<p>&nbsp;<\/p>\n<p>Sand is able to remove small-sized organic and inorganic solids, due to the effect of electrical forces caused by friction as the water passes through the filter bed.<\/p>\n<p>&nbsp;<\/p>\n<p>Water must be made to flow at low speed; if not, canals are formed in the sand and no filtration occurs.<\/p>\n<p>&nbsp;<\/p>\n<p>The system produces a minimum load loss due to the use of collector arms or nozzles at the filtered water outflow; these arms cover the entire surface of the bed and ensure that water circulates uniformly.<\/p>\n<p>&nbsp;<\/p>\n<p>In cases where there is a considerable amount of colloidal substances or saline precipitates, flocculation is used for the purpose of bringing together particles, which facilitates their retention in the layer of sand grains. This prevents small sized particles from getting through the filter bed. Flocculation is carried out using chemical substances known as polyelectrolytes.<\/p>\n<p>&nbsp;<\/p>\n<p>Filtration occurs in a downward direction. As dirt accumulates, there is an increase in the pressure difference between the area \u201cupstream\u201d of the filter bed and the area \u201cdownstream\u201d of the bed. Once a pre-established pressure differential is reached, the filter is cleaned. Two versions of the <a href=\"https:\/\/lama.es\/en\/irrigation-valves\/\">Lama Globe valve<\/a> &#8211; metal and plastic &#8211; are used for this cleaning process.<\/p>\n<p>&nbsp;<\/p>\n<p>The carbon steel elements are treated with Nanotechnology, which consists of the spreading of molecules across the surface with a very thin thickness compared to other applications on the market. The deposition of a double conversion layer on the surface of the steel protects against corrosion. This results in a uniform and clean adhesion of the paint particles that are applied immediately afterwards.[\/vc_column_text][\/vc_column][\/vc_row][vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;full_width&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221;][vc_column][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;full_width&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221;][vc_column width=&#8221;1\/2&#8243;][vc_column_text][\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/2&#8243;][vc_column_text]Sand filtering consists of the physical retention of dirt in holes formed between grains used in the entire filter layer. It is depth filtration, and this characteristic makes it the most effective of all systems. It&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2013","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Irrigation sand filters | Lama<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lama.es\/en\/irrigation-sand-filters\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Irrigation sand filters | Lama\" \/>\n<meta property=\"og:description\" content=\"[vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;full_width&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221;][vc_column width=&#8221;1\/2&#8243;][vc_column_text][\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/2&#8243;][vc_column_text]Sand filtering consists of the physical retention of dirt in holes formed between grains used in the entire filter layer. It is depth filtration, and this characteristic makes it the most effective of all systems. It...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lama.es\/en\/irrigation-sand-filters\/\" \/>\n<meta property=\"og:site_name\" content=\"LAMA Sistema de Filtrado\" \/>\n<meta property=\"article:modified_time\" content=\"2025-05-20T12:44:52+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/lama.es\\\/en\\\/irrigation-sand-filters\\\/\",\"url\":\"https:\\\/\\\/lama.es\\\/en\\\/irrigation-sand-filters\\\/\",\"name\":\"Irrigation sand filters | Lama\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/lama.es\\\/fr\\\/#website\"},\"datePublished\":\"2017-09-28T09:38:52+00:00\",\"dateModified\":\"2025-05-20T12:44:52+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/lama.es\\\/en\\\/irrigation-sand-filters\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/lama.es\\\/en\\\/irrigation-sand-filters\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/lama.es\\\/en\\\/irrigation-sand-filters\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Portada\",\"item\":\"https:\\\/\\\/lama.es\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Irrigation sand filters\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/lama.es\\\/fr\\\/#website\",\"url\":\"https:\\\/\\\/lama.es\\\/fr\\\/\",\"name\":\"LAMA Sistema de Filtrado\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/lama.es\\\/fr\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Irrigation sand filters | Lama","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/lama.es\/en\/irrigation-sand-filters\/","og_locale":"en_US","og_type":"article","og_title":"Irrigation sand filters | Lama","og_description":"[vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;full_width&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221;][vc_column width=&#8221;1\/2&#8243;][vc_column_text][\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/2&#8243;][vc_column_text]Sand filtering consists of the physical retention of dirt in holes formed between grains used in the entire filter layer. 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