{"id":12110,"date":"2026-05-18T16:42:17","date_gmt":"2026-05-18T14:42:17","guid":{"rendered":"https:\/\/lubeteam.it\/?post_type=product&#038;p=12110"},"modified":"2026-07-02T11:25:43","modified_gmt":"2026-07-02T09:25:43","slug":"flat-diaphragm-pulsation-dampener-fox-bth-plastic-bellows-series","status":"publish","type":"product","link":"https:\/\/lubeteam.it\/en\/product\/flat-diaphragm-pulsation-dampener-fox-bth-plastic-bellows-series\/","title":{"rendered":"Flat Diaphragm Pulsation Dampener &#8211; FOX BTH-Plastic Bellows Series"},"content":{"rendered":"<div class=\"page-content container\">\n<div id=\"middle\">\n<div id=\"content\" class=\"content col-md-9\" role=\"main\">\n<div id=\"section-23723\" class=\"section ec category-list\">\n<div class=\"section-body\">\n<div class=\"category-grid\">\n<div class=\"item row\">\n<div class=\"text col-sm-8\">\n<p id=\"p-rc_e380ab643007a725-68\" data-path-to-node=\"5\"><span data-path-to-node=\"5,1\"><span class=\"citation-247\">The FOX BTH-Plastic Series Flat Diaphragm &#8211; Bellows Pulsation Damper is an advanced engineering solution for the correct management of pulsations and pressure stabilisation within complex hydraulic systems<\/span><\/span><span data-path-to-node=\"5,3\">. Designed to offer maximum efficiency, this component plays a decisive role in preserving circuit integrity and extending the service life of the installed pumps.<\/span><\/p>\n<h3 data-path-to-node=\"6\">Operating Principle and Optimisation<\/h3>\n<p id=\"p-rc_e380ab643007a725-69\" data-path-to-node=\"7\"><span data-path-to-node=\"7,1\"><span class=\"citation-246\">The damping dynamics are based on a principle whereby the mechanical life of the device is inversely proportional to the increase in the internal compression ratio<\/span><\/span><span data-path-to-node=\"7,3\">. <\/span><span data-path-to-node=\"7,5\"><span class=\"citation-245\">For the accumulator to operate correctly as a pulsation damper, the nitrogen pre-charge pressure must be accurately set between 60% and 80% of the actual working pressure<\/span><\/span><span data-path-to-node=\"7,7\">. <\/span><span data-path-to-node=\"7,9\"><span class=\"citation-244\">This pre-charge must always take into close consideration the specific type of pump used and the operating temperature value of the fluid<\/span><\/span><span data-path-to-node=\"7,11\">. <\/span><span data-path-to-node=\"7,13\"><span class=\"citation-243\">Installation is extremely versatile: it can be carried out horizontally or vertically, provided that the nitrogen charging valve is strictly oriented upwards<\/span><\/span><span data-path-to-node=\"7,15\">.<\/span><\/p>\n<h3 data-path-to-node=\"8\">Construction Features and Material Range<\/h3>\n<p id=\"p-rc_e380ab643007a725-70\" data-path-to-node=\"9\"><span data-path-to-node=\"9,1\"><span class=\"citation-242\">The separation element of the BTH-Plastic series, available as a diaphragm or bellows, is made entirely of PTFE (Teflon), a material that ensures excellent chemical compatibility and high mechanical flexibility<\/span><\/span><span data-path-to-node=\"9,3\">. <\/span><span data-path-to-node=\"9,5\"><span class=\"citation-241\">The system is tested to handle a maximum working pressure (PS) of 10 bar, with a test pressure (PT) equal to PS x 1.43 \/ 1.5<\/span><\/span><span data-path-to-node=\"9,7\">. <\/span><span data-path-to-node=\"9,9\"><span class=\"citation-240\">The device integrates a nitrogen valve with a 5\/8&#8243; UNF connection as standard<\/span><\/span><span data-path-to-node=\"9,11\">.<\/span><\/p>\n<p data-path-to-node=\"10\">To adapt to the different requirements of the fluids used and to thermal stress, the damper body can be selected in four distinct thermoplastic compounds:<\/p>\n<ul data-path-to-node=\"11\">\n<li>\n<p id=\"p-rc_e380ab643007a725-71\" data-path-to-node=\"11,0,0\"><span data-path-to-node=\"11,0,0,1\"><span class=\"citation-239\">The <\/span><b data-path-to-node=\"11,0,0,1\" data-index-in-node=\"13\"><span class=\"citation-239\">BTHP<\/span><\/b><span class=\"citation-239\"> version in polypropylene (PP) is optimised for an operating range from 0\u00b0C to +70\u00b0C<\/span><\/span><span data-path-to-node=\"11,0,0,3\">.<\/span><\/p>\n<\/li>\n<li>\n<p id=\"p-rc_e380ab643007a725-72\" data-path-to-node=\"11,1,0\"><span data-path-to-node=\"11,1,0,1\"><span class=\"citation-238\">The <\/span><b data-path-to-node=\"11,1,0,1\" data-index-in-node=\"11\"><span class=\"citation-238\">BTHPVC<\/span><\/b><span class=\"citation-238\"> model in unplasticised polyvinyl chloride (PVC-U) is guaranteed for temperatures from -5\u00b0C to +50\u00b0C<\/span><\/span><span data-path-to-node=\"11,1,0,3\">.<\/span><\/p>\n<\/li>\n<li>\n<p id=\"p-rc_e380ab643007a725-73\" data-path-to-node=\"11,2,0\"><span data-path-to-node=\"11,2,0,1\"><span class=\"citation-237\">The <\/span><b data-path-to-node=\"11,2,0,1\" data-index-in-node=\"12\"><span class=\"citation-237\">BTHPVCC<\/span><\/b><span class=\"citation-237\"> version in chlorinated polyvinyl chloride (PVC-C) raises the upper limit, operating between -5\u00b0C and +60\u00b0C<\/span><\/span><span data-path-to-node=\"11,2,0,3\">.<\/span><\/p>\n<\/li>\n<li>\n<p id=\"p-rc_e380ab643007a725-74\" data-path-to-node=\"11,3,0\"><span data-path-to-node=\"11,3,0,1\"><span class=\"citation-236\">For the most demanding contexts, the <\/span><b data-path-to-node=\"11,3,0,1\" data-index-in-node=\"38\"><span class=\"citation-236\">BTHPVDF<\/span><\/b><span class=\"citation-236\"> option in polyvinylidene fluoride (PVDF) offers a temperature range from -20\u00b0C to +80\u00b0C<\/span><\/span><span data-path-to-node=\"11,3,0,3\">.<\/span><\/p>\n<\/li>\n<\/ul>\n<h3 data-path-to-node=\"12\">Special Versions and International Compliance<\/h3>\n<p id=\"p-rc_e380ab643007a725-75\" data-path-to-node=\"13\"><span data-path-to-node=\"13,1\"><span class=\"citation-235\">The modularity of the FOX BTH-Plastic Series Flat Diaphragm &#8211; Bellows Pulsation Damper allows the integration of connections with ANSI B16.5 or UNI\/DIN flanges, as well as versions with integrated flanges or special fittings manufactured upon specific request<\/span><\/span><span data-path-to-node=\"13,3\">. <\/span><span data-path-to-node=\"13,5\"><span class=\"citation-234\">For maximum performance, a high-pressure version up to 15 bar and the completely maintenance-free BTHP-SMF model are available<\/span><\/span><span data-path-to-node=\"13,7\">.<\/span><\/p>\n<p id=\"p-rc_e380ab643007a725-76\" data-path-to-node=\"14\"><span data-path-to-node=\"14,1\"><span class=\"citation-233\">Finally, to ensure installation in every market, the product can be supplied on request with certifications compliant with the main global standards, including: European CE (2014\/68\/EU-PED), British PD5500, Australian AS1210\/4343, as well as specific approvals for KOSHA, SELO, DOSH, NR-13, ARH, and tests issued by bodies such as DNV\/RINA, Lloyd&#8217;s\/ABS and BV<\/span><\/span><span data-path-to-node=\"14,3\">.<\/span><\/p>\n<h3 data-path-to-node=\"16\"><b data-path-to-node=\"16\" data-index-in-node=\"0\">Summary Technical Table<\/b><\/h3>\n<p data-path-to-node=\"17\">Summary technical table of the main features<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div style=\"width: 100%; overflow-x: auto;\">\n<table style=\"width: 100%; border-collapse: collapse;\">\n<thead>\n<tr>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\">Feature<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\">Value<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Diaphragm \/ Bellows<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">PTFE (Teflon)<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Maximum working pressure (PS)<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">10 bar<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Test pressure (PT)<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">PS x 1.43 \/ 1.5<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Standard nitrogen valve<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">5\/8&#8243; UNF<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Installation<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Horizontal \/ vertical (nitrogen valve facing upwards)<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Connection versions<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">ANSI B16.5 or UNI\/DIN flange, integrated flange, special version on request<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Operating temperature (BTHP &#8211; PP)<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0\u00b0C \/ +70\u00b0C<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Operating temperature (BTHPVC &#8211; PVC-U)<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">-5\u00b0C \/ +50\u00b0C<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Operating temperature (BTHPVCC &#8211; PVC-C)<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">-5\u00b0C \/ +60\u00b0C<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Operating temperature (BTHPVDF &#8211; PVDF)<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">-20\u00b0C \/ +80\u00b0C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3>Product Codes<\/h3>\n<div style=\"width: 100%; overflow-x: auto;\">\n<table style=\"width: 100%; border-collapse: collapse;\">\n<thead>\n<tr>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\">Model<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\">Nitrogen Volume (Lt)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\">Max Pressure (Bar)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\">Max N2 Pre-Charge (Bar)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\">H (mm)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\">D (mm)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\">C (mm)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\">Hydraulic Connection<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\">Weight (Kg)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">BTH&#8230;0.06<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.06<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">62<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">120<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">22<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3\/4&#8243; BSP-F<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.4<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">BTH&#8230;0.15<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.15<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">135<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">120<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">22<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3\/4&#8243; BSP-F<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.8<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">BTH&#8230;0.3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">175<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">120<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">22<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3\/4&#8243; BSP-F<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.1<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">BTH&#8230;0.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">210<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">120<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">22<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3\/4&#8243; BSP-F<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.4<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">BTH&#8230;0.7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">250<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">120<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">22<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3\/4&#8243; BSP-F<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.8<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">BTH&#8230;1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">212<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">125<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">22<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3\/4&#8243; BSP-F<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2.9<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">BTH&#8230;1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">276<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">125<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">22<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3\/4&#8243; BSP-F<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3.5<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">BTH&#8230;2.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">382<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">125<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">22<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3\/4&#8243; BSP-F<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4.5<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">BTH&#8230;5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">400<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">180<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">22<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1-1\/2&#8243; BSP-F<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">11<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">BTH&#8230;10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">720<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">180<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">22<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2&#8243; BSP-F<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">22<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>The FOX BTH-Plastic Series Flat Diaphragm &#8211; Bellows Pulsation Damper ensures optimal pulsation control in hydraulic circuits. Equipped with a resistant PTFE diaphragm and bellows, the component operates up to a maximum pressure of 10 bar. The accumulator can be configured with a body in PP, PVC-U, PVC-C or PVDF, ensuring maximum thermal flexibility from -20\u00b0C to +80\u00b0C. Ideal for horizontal or vertical installation, it is also available in high-pressure and maintenance-free versions. Available models: BTH 0.06, BTH 0.15, BTH 0.3, BTH 0.5, BTH 0.7, BTH 1, BTH 1.5, BTH 2.5, BTH 5, BTH 10.<\/p>\n","protected":false},"featured_media":12144,"template":"","meta":{"_joinchat":[]},"product_brand":[],"product_cat":[99,459],"product_tag":[260],"class_list":{"0":"post-12110","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-accumulators","7":"product_cat-pulsation-dampener","8":"product_tag-fox","10":"first","11":"instock","12":"shipping-taxable","13":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v26.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>FOX BTH-Plastic Pulsation Dampener \u2013 LubeTeam Hydraulic<\/title>\n<meta name=\"description\" content=\"Flat Diaphragm Pulsation Dampener - FOX BTH-Plastic Bellows Series. PTFE diaphragm. Versions for corrosive fluids available in PP, PVC, and PVDF.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lubeteam.it\/en\/product\/flat-diaphragm-pulsation-dampener-fox-bth-plastic-bellows-series\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Flat Diaphragm Pulsation Dampener - FOX BTH-Plastic Bellows Series\" \/>\n<meta property=\"og:description\" content=\"Flat Diaphragm Pulsation Dampener - FOX BTH-Plastic Bellows Series. PTFE diaphragm. 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