{"id":3474,"date":"2026-05-26T09:10:07","date_gmt":"2026-05-26T09:10:07","guid":{"rendered":"https:\/\/spm-macchine.com\/filtro\/prefiltro\/"},"modified":"2026-10-14T13:14:06","modified_gmt":"2026-10-14T13:14:06","slug":"pre-filter","status":"publish","type":"filtro","link":"https:\/\/spm-macchine.com\/en\/filters\/air-gas\/pre-filter\/","title":{"rendered":"Pre-filter"},"content":{"rendered":"<p><strong>Three technologies, one selection criterion: the material<\/strong><\/p>\n<p>The pre-filter is the product where the choice of pleating machine matters more than anywhere else. Materials vary considerably: lightweight G3\/G4 synthetic media from 100 to 300 g\/m\u00b2, two- or three-layer multilayer media, and composites with bonded metal or plastic mesh.<\/p>\n<p>Each material responds differently to pleating. SPM offers three technologies. Blade pleating (91XPL\/91XSPL): up to 300 pleats per minute, for synthetic and flexible materials. Star-wheel roller pleating (91XPRS): the same speed, for more rigid materials. Cylinder pleating (91XFPC): 200 pleats per minute, and the only solution for pleat heights above 150 mm.<\/p>\n<p><strong>The complete line: from pleating to finished cutting<\/strong><\/p>\n<p>Downstream of the pleating process, the line continues with strip gluing. For high-volume production, SPM uses the automatic strip gluing machine 90XSB: it can reach up to 600 filters per minute and is available in a screwless version for fast format changes.<\/p>\n<p>For lower production volumes, the 95XCUT-HM combines cutting and gluing in a single operation, with a production rate of approximately 5 pieces per minute.<\/p>\n<p><strong>Dimensional range and special heights<\/strong><\/p>\n<p>The standard range covers widths from 150 to 1,200 mm and pleat pitches from 5 to 30 mm. These dimensions cover the vast majority of civil and industrial HVAC applications.<\/p>\n<p>When a pleat height above 150 mm, up to 300 mm, is required, the only choice is the 91XFPC cylinder pleating machine. It is the only SPM machine capable of reaching this height. It is worth checking this requirement before selecting the line configuration, not afterwards.<\/p>\n","protected":false},"featured_media":3318,"template":"","meta":{"_acf_changed":false,"content-type":""},"categoria-filtro":[68],"class_list":["post-3474","filtro","type-filtro","status-publish","has-post-thumbnail","hentry","categoria-filtro-air-gas"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pre-Filter Machines for G3\/G4 Filters | SPM<\/title>\n<meta name=\"description\" content=\"Pre-filter machines for G3\/G4 filters: blade, star-wheel or cylinder pleaters up to 300 pleats\/min, widths 150\u20131,200 mm and pleat heights up to 300 mm.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/spm-macchine.com\/en\/filters\/air-gas\/pre-filter\/\" \/>\n<meta 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