{"id":12290,"date":"2026-05-20T15:31:35","date_gmt":"2026-05-20T13:31:35","guid":{"rendered":"https:\/\/lubeteam.it\/?post_type=product&p=12290"},"modified":"2026-05-25T10:03:37","modified_gmt":"2026-05-25T08:03:37","slug":"fox-hb-hbx-hbr-series-bladder-accumulator-repairable","status":"publish","type":"product","link":"https:\/\/lubeteam.it\/en\/product\/fox-hb-hbx-hbr-series-bladder-accumulator-repairable\/","title":{"rendered":"FOX HB – HBX – HBR Series Bladder Accumulator – Repairable"},"content":{"rendered":"
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The <\/span>FOX HB – HBX – HBR Series Bladder Accumulator – Repairable<\/span><\/b> is designed with a high-strength forged steel body, carefully sandblasted and painted to ensure excellent long-term durability in demanding industrial environments<\/span><\/span>. <\/span>This range of hydropneumatic accumulators is divided into two main construction configurations: the HB series, developed as an internationally repairable bottom-repair solution <\/span><\/span>, and the HBR series, specifically designed for top repair operations<\/span><\/span>. <\/span>The maximum working pressure (PS) reaches 350 bar for the standard models of both variants<\/span><\/span>. <\/span>However, for higher hydraulic requirements, the HB series is available in special versions capable of operating at 480 bar and even 690 bar<\/span><\/span>. <\/span>Each unit undergoes rigorous testing; the test pressure (PT) corresponds to the maximum pressure multiplied by a safety factor of 1.43, 1.3 or 1.5<\/span><\/span>. <\/span>A significant advantage of the HB series lies in its complete interchangeability: the models are dimensionally and technically compatible with accumulators from other brands belonging to the same category<\/span><\/span>.<\/span><\/p>\n

Operating and Installation Specifications<\/h3>\n

Equipped with a standard 5\/8″ UNF nitrogen valve <\/span><\/span>, the accumulator uses a standard bladder fully suitable for contact with mineral oils and non-aggressive fluids<\/span><\/span>. <\/span>The permitted operating temperature range (TS) is very wide and extends from -20\u00b0C to +80\u00b0C<\/span><\/span>. <\/span>The versatility of the component is also reflected in the installation options, which may be horizontal or vertical, provided that the nitrogen valve is always facing upward<\/span><\/span>.<\/span><\/p>\n

Compression Ratio and Use as a Dampener<\/h3>\n

To ensure maximum performance and preserve the mechanical integrity of the hydraulic system, the recommended compression ratio is P2\/P0 = 2.5 <\/span><\/span>, although there is a maximum tolerated technical limit of P2\/P0 = 4<\/span><\/span>. <\/span>Operating parameters directly affect the mechanical lifespan of the accumulator, whose useful cycle count is inversely proportional to the increase in compression ratio<\/span><\/span>. <\/span>In specific applications, when the unit functions as a pulsation dampener, the nitrogen precharge pressure must necessarily fall within a range between 60% and 80% of the working pressure, carefully calibrating the value according to the type of pump used and the operating temperature of the fluid<\/span><\/span>.<\/span><\/p>\n

Customization Options and International Compliance<\/h3>\n

The HB and HBR series offer a wide range of customization options to meet dedicated system requirements. <\/span>It is possible to request internal coatings in different materials, bladders made from special compounds (HNBR, EPDM, FPM), as well as the implementation of stainless steel nitrogen valves<\/span><\/span>. <\/span>For the hydraulic section, SAE 3000, SAE 6000, ANSI B16.5, UNI\/DIN flanged connections and special custom-made connections are available<\/span><\/span>. <\/span>The high quality standards and safety are certified by the numerous regulatory compliances available upon request, covering the main global markets: from European CE (PED) and ATEX directives to ASME VIII, KOSHA, SELO standards, as well as naval and offshore certifications such as DNV \/ RINA and Lloyd’s \/ ABS<\/span><\/span>.<\/span><\/p>\n

Summary Technical Table<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Feature<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
Maximum working pressure (PS)<\/td>\n350 – 480 – 690 bar (depending on series\/version)<\/td>\n<\/tr>\n
Test pressure (PT)<\/td>\nPS x 1.43 \/ 1.3 \/ 1.5<\/td>\n<\/tr>\n
Body<\/td>\nForged steel, sandblasted and painted<\/td>\n<\/tr>\n
Operating temperature (TS)<\/td>\nFrom -20\u00b0C to +80\u00b0C<\/td>\n<\/tr>\n
Standard bladder<\/td>\nSuitable for mineral oils and non-aggressive fluids<\/td>\n<\/tr>\n
Installation<\/td>\nHorizontal or vertical (nitrogen valve facing upward)<\/td>\n<\/tr>\n
Recommended compression ratio<\/td>\nP2 \/ P0 = 2.5<\/td>\n<\/tr>\n
Maximum compression ratio<\/td>\nP2 \/ P0 = 4<\/td>\n<\/tr>\n
Standard nitrogen valve<\/td>\n5\/8″ UNF<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Product Codes<\/h3>\n
\n\n\n\n
Model<\/th>\nNitrogen Volume (L)<\/th>\nMax Pressure (Bar)<\/th>\nMax N2 Precharge (Bar)<\/th>\nHydraulic Connection<\/th>\nMax Flow Rate (L\/min)<\/th>\nWeight (Kg)<\/th>\n<\/tr>\n<\/thead>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

The <\/span>FOX HB – HBX – HBR Series Bladder Accumulator – Repairable<\/span><\/b> is a hydropneumatic component designed for heavy-duty industrial applications, available in bottom-repairable (HB Series) and top-repairable (HBR Series) versions<\/span><\/span>. <\/span>Manufactured from forged steel and tested for working pressures that, in special versions, reach up to 690 bar<\/span><\/span>, it ensures maximum reliability. <\/span>The standard bladder, ideal for mineral oils, operates within a temperature range from -20\u00b0C to +80\u00b0C<\/span><\/span>. <\/span>The unit allows both horizontal and vertical installation<\/span><\/span>.<\/span><\/p>\n","protected":false},"featured_media":12362,"template":"","meta":{"_joinchat":[]},"product_brand":[],"product_cat":[99,463],"product_tag":[260],"class_list":{"0":"post-12290","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-accumulators","7":"product_cat-bladder-accumulator","8":"product_tag-fox","10":"first","11":"instock","12":"shipping-taxable","13":"product-type-simple"},"yoast_head":"\nFOX HB - HBX - HBR Series Bladder Accumulator \u2013 LubeTeam Hydraulic<\/title>\n<meta name=\"description\" content=\"Discover the FOX HB - HBX - HBR Series Bladder Accumulator - Repairable. 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