{"id":12110,"date":"2026-05-18T16:42:17","date_gmt":"2026-05-18T14:42:17","guid":{"rendered":"https:\/\/lubeteam.it\/?post_type=product&p=12110"},"modified":"2026-05-25T09:33:14","modified_gmt":"2026-05-25T07:33:14","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 – FOX BTH-Plastic Bellows Series"},"content":{"rendered":"
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The Flat Diaphragm Pulsation Dampener – FOX BTH-Plastic Bellows Series represents an advanced engineering solution for the effective management of pulsations and pressure stabilization within complex hydraulic systems. Designed to deliver maximum efficiency, this component plays a crucial role in preserving circuit integrity and extending the service life of installed pumps.<\/p>\n

Operating Principle and Optimization<\/h3>\n

The damping dynamics are based on a principle whereby the mechanical lifespan of the device is inversely proportional to the increase in the internal compression ratio. In order for the accumulator to operate correctly as a pulsation dampener, the nitrogen pre-charge pressure must be accurately set between 60% and 80% of the actual working pressure. This pre-charge must always take into careful consideration both the specific pump type used and the operating temperature of the fluid. Installation is extremely versatile and can be carried out either horizontally or vertically, provided that the nitrogen charging valve is strictly oriented upward.<\/p>\n

Construction Features and Material Range<\/h3>\n

The separation element of the BTH-Plastic series, available as either a diaphragm or bellows, is entirely manufactured from PTFE (Teflon), a material ensuring excellent chemical compatibility and high mechanical flexibility. The system is tested for a maximum working pressure (PS) of 10 bar, with a test pressure (PT) equal to PS x 1.43 \/ 1.5. The device is supplied as standard with a nitrogen valve featuring a 5\/8″ UNF connection.<\/p>\n

To meet different fluid compatibility requirements and thermal stresses, the dampener body is available in four different thermoplastic compounds:<\/p>\n

    \n
  • BTHP<\/b> polypropylene (PP) version optimized for an operating range from 0\u00b0C to +70\u00b0C.<\/li>\n
  • BTHPVC<\/b> unplasticized polyvinyl chloride (PVC-U) model guaranteed for temperatures from -5\u00b0C to +50\u00b0C.<\/li>\n
  • BTHPVCC<\/b> chlorinated polyvinyl chloride (PVC-C) version extending the upper operating limit to +60\u00b0C, with a range from -5\u00b0C to +60\u00b0C.<\/li>\n
  • BTHPVDF<\/b> polyvinylidene fluoride (PVDF) option designed for the most demanding applications, offering a temperature range from -20\u00b0C to +80\u00b0C.<\/li>\n<\/ul>\n

    Special Versions and International Compliance<\/h3>\n

    The modular design of the FOX BTH-Plastic Flat Diaphragm Pulsation Dampener allows the integration of ANSI B16.5 or UNI\/DIN flange connections, as well as integrated flange versions and custom-made special fittings upon request. For maximum performance requirements, high-pressure versions (up to 15 bar) and the completely maintenance-free BTHP-SMF model are also available.<\/p>\n

    To ensure installation compatibility across international markets, the product can be supplied upon request with certifications complying with major 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 inspections issued by certification bodies such as DNV\/RINA, Lloyd\u2019s\/ABS, and BV.<\/p>\n

    Technical Summary Table<\/b><\/h3>\n

    Technical summary table of the main characteristics.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

    \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Feature<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
    Diaphragm \/ Bellows<\/td>\nPTFE (Teflon)<\/td>\n<\/tr>\n
    Maximum Working Pressure (PS)<\/td>\n10 bar<\/td>\n<\/tr>\n
    Test Pressure (PT)<\/td>\nPS x 1.43 \/ 1.5<\/td>\n<\/tr>\n
    Standard Nitrogen Valve<\/td>\n5\/8″ UNF<\/td>\n<\/tr>\n
    Installation<\/td>\nHorizontal \/ Vertical (nitrogen valve facing upward)<\/td>\n<\/tr>\n
    Connection Versions<\/td>\nANSI B16.5 or UNI\/DIN Flange, Integrated Flange, Custom on Request<\/td>\n<\/tr>\n
    Operating Temperature (BTHP – PP)<\/td>\n0\u00b0C \/ +70\u00b0C<\/td>\n<\/tr>\n
    Operating Temperature (BTHPVC – PVC-U)<\/td>\n-5\u00b0C \/ +50\u00b0C<\/td>\n<\/tr>\n
    Operating Temperature (BTHPVCC – PVC-C)<\/td>\n-5\u00b0C \/ +60\u00b0C<\/td>\n<\/tr>\n
    Operating Temperature (BTHPVDF – PVDF)<\/td>\n-20\u00b0C \/ +80\u00b0C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Product Codes<\/h3>\n
    \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Model<\/th>\nNitrogen Volume (Lt)<\/th>\nMax Pressure (Bar)<\/th>\nMax N2 Pre-charge (Bar)<\/th>\nH (mm)<\/th>\nD (mm)<\/th>\nC (mm)<\/th>\nHydraulic Connection<\/th>\nWeight (Kg)<\/th>\n<\/tr>\n<\/thead>\n
    BTH…0.06<\/td>\n0.06<\/td>\n10<\/td>\n7<\/td>\n62<\/td>\n120<\/td>\n22<\/td>\n3\/4″ BSP-F<\/td>\n0.4<\/td>\n<\/tr>\n
    BTH…0.15<\/td>\n0.15<\/td>\n10<\/td>\n7<\/td>\n135<\/td>\n120<\/td>\n22<\/td>\n3\/4″ BSP-F<\/td>\n0.8<\/td>\n<\/tr>\n
    BTH…0.3<\/td>\n0.3<\/td>\n10<\/td>\n7<\/td>\n175<\/td>\n120<\/td>\n22<\/td>\n3\/4″ BSP-F<\/td>\n1.1<\/td>\n<\/tr>\n
    BTH…0.5<\/td>\n0.5<\/td>\n10<\/td>\n7<\/td>\n210<\/td>\n120<\/td>\n22<\/td>\n3\/4″ BSP-F<\/td>\n1.4<\/td>\n<\/tr>\n
    BTH…0.7<\/td>\n0.7<\/td>\n10<\/td>\n7<\/td>\n250<\/td>\n120<\/td>\n22<\/td>\n3\/4″ BSP-F<\/td>\n1.8<\/td>\n<\/tr>\n
    BTH…1<\/td>\n1<\/td>\n10<\/td>\n7<\/td>\n212<\/td>\n125<\/td>\n22<\/td>\n3\/4″ BSP-F<\/td>\n2.9<\/td>\n<\/tr>\n
    BTH…1.5<\/td>\n1.5<\/td>\n10<\/td>\n7<\/td>\n276<\/td>\n125<\/td>\n22<\/td>\n3\/4″ BSP-F<\/td>\n3.5<\/td>\n<\/tr>\n
    BTH…2.5<\/td>\n2.5<\/td>\n10<\/td>\n7<\/td>\n382<\/td>\n125<\/td>\n22<\/td>\n3\/4″ BSP-F<\/td>\n4.5<\/td>\n<\/tr>\n
    BTH…5<\/td>\n5<\/td>\n10<\/td>\n7<\/td>\n400<\/td>\n180<\/td>\n22<\/td>\n1-1\/2″ BSP-F<\/td>\n11<\/td>\n<\/tr>\n
    BTH…10<\/td>\n10<\/td>\n10<\/td>\n7<\/td>\n720<\/td>\n180<\/td>\n22<\/td>\n2″ BSP-F<\/td>\n22<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

    The FOX BTH-Plastic Flat Diaphragm Pulsation Dampener ensures optimal pulsation control in hydraulic circuits. Equipped with a durable PTFE diaphragm and bellows, the component operates up to a maximum pressure of 10 bar. The accumulator can be configured with a PP, PVC-U, PVC-C, or PVDF body, ensuring maximum thermal flexibility from -20\u00b0C to +80\u00b0C. Ideal for both horizontal and vertical installations, it is also available in high-pressure and maintenance-free versions.<\/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":"\nFOX BTH-Plastic Pulsation Dampener \u2013 LubeTeam Hydraulic<\/title>\n<meta name=\"description\" content=\"Flat Diaphragm Pulsation Dampener - FOX BTH-Plastic Bellows Series. PTFE diaphragm. 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