{"id":2506,"date":"2026-10-01T11:16:34","date_gmt":"2026-10-01T11:16:34","guid":{"rendered":"https:\/\/trecolan.onlinemarketing-ruile.de\/?post_type=product&p=2506"},"modified":"2026-10-01T11:19:56","modified_gmt":"2026-10-01T11:19:56","slug":"filter-foam-np4r","status":"publish","type":"product","link":"https:\/\/trecolan.onlinemarketing-ruile.de\/en\/product\/filter-foam-np4r\/","title":{"rendered":"Filter Foam NP4R"},"content":{"rendered":"

Filter foam NP4R is an anthracite, open-pore foam with 25 ppi in a 2000 x 1000 x 20 mm sheet format. It is used as a pre-filter stage in extraction systems.<\/p>\n

What 25 ppi means<\/h2>\n

The ppi figure stands for pores per inch and describes the fineness of the foam. 25 ppi is a medium porosity: fine enough to retain fibre fly and coarser particles, yet open enough to keep pressure loss and therefore fan load low.<\/p>\n

A pre-filter protects the main stage<\/h2>\n

Fine filters and filter cells are expensive and clog quickly when coarse fibre fly hits them directly. An upstream foam mat catches that fraction and considerably extends the service life of the expensive filter stage, at a fraction of the cost.<\/p>\n

Cutting and ordering<\/h2>\n

The sheet can be cut to any filter size with a sharp or electric knife. One sheet equals 2.0 m\u00b2. Price and delivery time are quoted according to requirement \u2013 please state the quantity needed.<\/p>\n

Technical data<\/h3>\n\n\n\n\n\n\n\n\n\n
Material<\/th>\nfilter foam<\/td>\n<\/tr>\n
Colour<\/th>\nanthracite<\/td>\n<\/tr>\n
Porosity<\/th>\n25 ppi<\/td>\n<\/tr>\n
Sheet size<\/th>\n2000 x 1000 x 20 mm<\/td>\n<\/tr>\n
Sales unit<\/th>\nm\u00b2<\/td>\n<\/tr>\n
Item number<\/th>\n390100T<\/td>\n<\/tr>\n
Manufacturer<\/th>\nTrecolan Handels GmbH<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Frequently asked questions<\/h3>\n

How often must the pre-filter be replaced?<\/h4>\n

Depending on fibre fly in operation; visible clogging and declining extraction performance are the signals.<\/p>\n

Can the foam be washed out?<\/h4>\n

Coarse dust can be knocked or blown out; with heavy soiling replacement is more sensible.<\/p>\n

Why is no price shown?<\/h4>\n

Filter foam is procured according to requirement and therefore quoted individually.<\/p>\n","protected":false},"excerpt":{"rendered":"

    \n
  • Open-pore filter foam with 25 ppi porosity<\/li>\n
  • Sheet size 2000 x 1000 x 20 mm = 2.0 m\u00b2<\/li>\n
  • For extraction systems, air cleaners and pre-filter stages<\/li>\n
  • Price and availability on request<\/li>\n<\/ul>\n","protected":false},"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[],"product_cat":[2443,2444],"product_tag":[],"class_list":["post-2506","product","type-product","status-publish","product_cat-filter-media","product_cat-pre-filter-mats","desktop-align-left","tablet-align-left","mobile-align-left","first","instock","taxable","shipping-taxable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/trecolan.onlinemarketing-ruile.de\/en\/wp-json\/wp\/v2\/product\/2506","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/trecolan.onlinemarketing-ruile.de\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/trecolan.onlinemarketing-ruile.de\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/trecolan.onlinemarketing-ruile.de\/en\/wp-json\/wp\/v2\/comments?post=2506"}],"wp:attachment":[{"href":"https:\/\/trecolan.onlinemarketing-ruile.de\/en\/wp-json\/wp\/v2\/media?parent=2506"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/trecolan.onlinemarketing-ruile.de\/en\/wp-json\/wp\/v2\/product_brand?post=2506"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/trecolan.onlinemarketing-ruile.de\/en\/wp-json\/wp\/v2\/product_cat?post=2506"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/trecolan.onlinemarketing-ruile.de\/en\/wp-json\/wp\/v2\/product_tag?post=2506"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}