{"id":14241,"date":"2026-08-09T13:51:24","date_gmt":"2026-08-09T13:51:24","guid":{"rendered":"https:\/\/hydraflu.com\/?p=14241"},"modified":"2026-10-12T02:39:03","modified_gmt":"2026-10-12T02:39:03","slug":"understanding-the-hydraulic-lift-and-its-function","status":"publish","type":"post","link":"https:\/\/hydraflu.com\/es\/comprender-el-elevador-hidraulico-y-su-funcion\/","title":{"rendered":"Entendiendo el elevador hidr\u00e1ulico y su funci\u00f3n"},"content":{"rendered":"<h1><\/h1>\n<p><span style=\"font-weight: 400;\">Un elevador hidr\u00e1ulico es un dispositivo que utiliza uno o m\u00e1s pistones presurizados para elevar una carga pesada. Los elevadores hidr\u00e1ulicos se utilizan en la mayor\u00eda de las industrias actuales y simplifican la elevaci\u00f3n de cargas pesadas. Permiten el funcionamiento de elevadores de autom\u00f3viles, gr\u00faas y otros equipos de gran capacidad.\u00a0<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">\u00bfQu\u00e9 es un elevador hidr\u00e1ulico?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Un elevador hidr\u00e1ulico es un dispositivo especializado con uno o m\u00e1s cilindros que se elevan gracias a la presi\u00f3n de un fluido. Un mecanismo compresor aumenta la presi\u00f3n dentro de cada cilindro, lo que provoca su expansi\u00f3n.\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">Generalmente, los cilindros se expanden hacia arriba creando una elevaci\u00f3n vertical, pero en el autom\u00f3vil de un elevador de tijera los cilindros se expanden en un \u00e1ngulo de 45 grados para crear la potencia de elevaci\u00f3n del dispositivo.\u00a0<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">\u00bfPor qu\u00e9 se utilizan los elevadores hidr\u00e1ulicos en tantas aplicaciones?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Los elevadores hidr\u00e1ulicos se utilizan en la mayor\u00eda de las industrias actuales porque facilitan la elevaci\u00f3n de cargas pesadas de forma lenta y controlada. Con un elevador hidr\u00e1ulico bien dise\u00f1ado, es posible elevar miles de kilos al \u00e1rea de trabajo de forma lenta y segura.\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">El elevador baja las cargas al suelo con la misma facilidad, liberando lentamente la presi\u00f3n acumulada. Los elevadores hidr\u00e1ulicos tambi\u00e9n son compactos, lo que permite alcanzar impresionantes fuerzas de elevaci\u00f3n en espacios reducidos.\u00a0<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">\u00bfC\u00f3mo funciona un elevador hidr\u00e1ulico?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Los ascensores hidr\u00e1ulicos funcionan seg\u00fan la ley de Pascal para almacenar trabajo mec\u00e1nico y utilizarlo como fuerza de elevaci\u00f3n. Cuando se aplica presi\u00f3n a un fluido incomprimible, este se presuriza uniformemente en todas sus \u00e1reas. Los ascensores aprovechan esta ley creando un cilindro estrecho para generar presi\u00f3n y un cilindro ancho para aplicarla.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-14243\" src=\"https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/lift-1.jpg\" alt=\"elevador hidr\u00e1ulico-1\" width=\"282\" height=\"161\" \/><\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">Si observa el diagrama anterior, es f\u00e1cil ver c\u00f3mo se utiliza un cilindro estrecho para generar presi\u00f3n y uno ancho para liberarla. Los elevadores hidr\u00e1ulicos utilizan un tubo estrecho para generar presi\u00f3n, ya que este es m\u00e1s f\u00e1cil de comprimir y requiere equipos menos robustos. Esta presi\u00f3n generada se dirige en la direcci\u00f3n de las flechas, donde fluye a trav\u00e9s de v\u00e1lvulas unidireccionales. A medida que se bombea el cilindro estrecho, la presi\u00f3n se acumula en el lateral del cilindro grande, creando una enorme presi\u00f3n capaz de levantar veh\u00edculos o incluso objetos mucho m\u00e1s pesados.\u00a0<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Diferentes tipos de elevadores hidr\u00e1ulicos<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Si bien los principios de los elevadores hidr\u00e1ulicos son los mismos, hoy en d\u00eda se utilizan diferentes tipos. Comprender algunos de los diferentes tipos puede ayudarle a elegir la opci\u00f3n que mejor se adapte a sus necesidades.\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>\n<h3><span style=\"font-weight: 400;\">Elevador de tijera<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Un elevador de tijera utiliza uno o m\u00e1s cilindros hidr\u00e1ulicos, una base robusta, una plataforma elevadora y m\u00faltiples brazos de tijera. Los cilindros generan la fuerza de elevaci\u00f3n necesaria para elevar la plataforma verticalmente, y los brazos de tijera garantizan una aplicaci\u00f3n uniforme de la fuerza de elevaci\u00f3n para lograr una plataforma robusta.\u00a0<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Elevador de un solo poste<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Los elevadores de un solo poste se utilizan en numerosas aplicaciones en diversas industrias. Utilizan un solo cilindro para elevar en una direcci\u00f3n, generalmente vertical. Son compactos y, aun as\u00ed, pueden aplicar miles de libras de presi\u00f3n.\u00a0<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-14244\" src=\"https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/lift-3.jpg\" alt=\"elevador hidr\u00e1ulico-3\" width=\"218\" height=\"219\" srcset=\"https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/lift-3.jpg 571w, https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/lift-3-150x150.jpg 150w\" sizes=\"auto, (max-width: 218px) 100vw, 218px\" \/><\/p>\n<h3><span style=\"font-weight: 400;\">Elevador de dos o cuatro columnas<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">La mayor\u00eda de los elevadores hidr\u00e1ulicos utilizan cilindros hidr\u00e1ulicos verticales y compresores para elevar y bajar cargas pesadas. Un elevador de dos columnas utiliza dos cilindros, mientras que uno de cuatro columnas utiliza cuatro para elevar una plataforma grande. Cada cilindro hidr\u00e1ulico est\u00e1 dise\u00f1ado para levantar una cantidad espec\u00edfica de peso, y varios se utilizan en conjunto para aumentar la potencia de elevaci\u00f3n del dispositivo.\u00a0<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-14245\" src=\"https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/lift-2.jpg\" alt=\"elevador hidr\u00e1ulico-2\" width=\"485\" height=\"217\" \/><\/p>\n<p><span style=\"font-weight: 400;\">A continuaci\u00f3n se muestran elevadores de dos y cuatro columnas. Un elevador de cuatro columnas proporciona una fuerza de elevaci\u00f3n m\u00e1s estable, pero una unidad de dos columnas es m\u00e1s compacta y ofrece suficiente potencia para elevar la mayor\u00eda de los veh\u00edculos.\u00a0<\/span><\/p>\n<h3>Ascensor hidr\u00e1ulico<\/h3>\n<p><img data-dominant-color=\"8a8379\" data-has-transparency=\"false\" style=\"--dominant-color: #8a8379;\" loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-19540 not-transparent\" src=\"https:\/\/hydraflu.com\/wp-content\/uploads\/2026\/01\/Hydraulic-Elevator.avif\" alt=\"Ascensor hidr\u00e1ulico\" width=\"500\" height=\"500\" srcset=\"https:\/\/hydraflu.com\/wp-content\/uploads\/2026\/01\/Hydraulic-Elevator.avif 500w, https:\/\/hydraflu.com\/wp-content\/uploads\/2026\/01\/Hydraulic-Elevator-150x150.avif 150w, https:\/\/hydraflu.com\/wp-content\/uploads\/2026\/01\/Hydraulic-Elevator-12x12.avif 12w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>A hydraulic elevator moves a passenger car or goods platform between floors. A cylinder pushes the car up. To go down, a valve block lets oil flow back to the tank at a controlled speed. The power unit needs no machine room above the shaft, so it fits in a narrow hoistway, a small cabinet or under the stairs. That is why hydraulic elevators are common in homes, villas and low-rise buildings.<br \/>\nThree parts of the power unit shape how the elevator rides:<br \/>\n<strong>\u2022 Pump:<\/strong> It sets the noise level. Vane pumps run at about 55 dB(A) at 1 m. Helical rotor pumps run at about 50 dB(A) and suit most home elevators. Triple-screw pumps run at about 43 dB(A) with near-zero oil pulsation, for projects that need a very quiet ride.<\/p>\n<p><img data-dominant-color=\"d8d8da\" data-has-transparency=\"false\" style=\"--dominant-color: #d8d8da;\" loading=\"lazy\" decoding=\"async\" class=\"wp-image-20196 alignright not-transparent\" src=\"https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/HELICAL-ROTOR-PUMP-1.avif\" alt=\"HELICAL ROTOR PUMP\" width=\"276\" height=\"276\" srcset=\"https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/HELICAL-ROTOR-PUMP-1.avif 500w, https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/HELICAL-ROTOR-PUMP-1-150x150.avif 150w, https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/HELICAL-ROTOR-PUMP-1-12x12.avif 12w\" sizes=\"auto, (max-width: 276px) 100vw, 276px\" \/><\/p>\n<p><img data-dominant-color=\"e6e6e7\" data-has-transparency=\"false\" style=\"--dominant-color: #e6e6e7;\" loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-20197 not-transparent\" src=\"https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/TRIPLE-SCREW-PUMP-1.avif\" alt=\"TRIPLE SCREW PUMP\" width=\"271\" height=\"271\" srcset=\"https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/TRIPLE-SCREW-PUMP-1.avif 500w, https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/TRIPLE-SCREW-PUMP-1-150x150.avif 150w, https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/TRIPLE-SCREW-PUMP-1-12x12.avif 12w\" sizes=\"auto, (max-width: 271px) 100vw, 271px\" \/><\/p>\n<p><strong>\u2022 Valve block:<\/strong> It controls acceleration, travel speed, slowdown and leveling. VFD-controlled blocks reach 0.23\u20130.32 m\/s. Valve-controlled blocks reach 0.35 m\/s without a VFD. A proportional valve gives stepless speed and leveling within \u00b12 mm, compared with \u00b110 mm for stepped control.<\/p>\n<p><img data-dominant-color=\"e1e0e2\" data-has-transparency=\"false\" style=\"--dominant-color: #e1e0e2;\" loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-20198 not-transparent\" src=\"https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/Double-Speed-Buffer-type-Four-Valve.avif\" alt=\"Hydraulic elevator EV100 replacement\" width=\"346\" height=\"346\" srcset=\"https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/Double-Speed-Buffer-type-Four-Valve.avif 500w, https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/Double-Speed-Buffer-type-Four-Valve-150x150.avif 150w, https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/Double-Speed-Buffer-type-Four-Valve-12x12.avif 12w\" sizes=\"auto, (max-width: 346px) 100vw, 346px\" \/><img data-dominant-color=\"f4f4f4\" data-has-transparency=\"false\" loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-20199 not-transparent\" style=\"--dominant-color: #f4f4f4; font-weight: inherit;\" src=\"https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/Diagram-of-90.avif\" alt=\"Diagram of 90\" width=\"346\" height=\"346\" srcset=\"https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/Diagram-of-90.avif 500w, https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/Diagram-of-90-150x150.avif 150w, https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/Diagram-of-90-12x12.avif 12w\" sizes=\"auto, (max-width: 346px) 100vw, 346px\" \/><\/p>\n<p><strong>\u2022 Safety valves:<\/strong> A pressure-retaining valve stops the car from creeping down when parked. A rupture valve cuts off oil flow if a hose bursts, for systems built to EN 81-20:2020. A hand pump and manual descent valve let you move the car during a power failure.<br \/>\nSee our hydraulic power pack range or download the product catalogue for elevator power unit specs.<\/p>\n<p><img data-dominant-color=\"d6d7db\" data-has-transparency=\"false\" style=\"--dominant-color: #d6d7db;\" loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-20200 not-transparent\" src=\"https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/RUPTURE-VALVE-2.avif\" alt=\"RUPTURE VALVE\" width=\"318\" height=\"318\" srcset=\"https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/RUPTURE-VALVE-2.avif 500w, https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/RUPTURE-VALVE-2-150x150.avif 150w, https:\/\/hydraflu.com\/wp-content\/uploads\/2024\/11\/RUPTURE-VALVE-2-12x12.avif 12w\" sizes=\"auto, (max-width: 318px) 100vw, 318px\" \/><\/p>\n<h2><span style=\"font-weight: 400;\">Pr\u00e1cticas adecuadas de mantenimiento<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Para garantizar el correcto funcionamiento de un elevador hidr\u00e1ulico, es necesario un mantenimiento minucioso. El proceso de mantenimiento comienza con el mantenimiento del nivel adecuado de fluido hidr\u00e1ulico y la sustituci\u00f3n del aceite hidr\u00e1ulico usado por aceite nuevo. Un t\u00e9cnico debe verificar peri\u00f3dicamente que el nivel de fluido hidr\u00e1ulico sea lo suficientemente alto para un rendimiento \u00f3ptimo. Si el nivel es demasiado bajo, se puede a\u00f1adir fluido adicional.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Con el tiempo, el fluido hidr\u00e1ulico o el aceite hidr\u00e1ulico se degrada. A medida que se degrada, no se comprime ni eleva con la misma eficacia, y no lubrica los componentes internos con la misma eficacia. Esto provoca un rendimiento inadecuado y, con el tiempo, da\u00f1os al sistema.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Para solucionar este problema, es necesario reemplazar el fluido hidr\u00e1ulico peri\u00f3dicamente. El ciclo de reemplazo depende del tipo de elevador y del fluido utilizado, y un t\u00e9cnico experimentado debe saber con qu\u00e9 frecuencia hacerlo.\u00a0<\/span><\/p>\n<p>For hydraulic elevators, match the oil to the room temperature. Our elevator valve blocks call for ISO VG 32 (L-HM) at 0\u201330 \u00b0C and ISO VG 46 (L-HM) at 35\u201350 \u00b0C. Below 0 \u00b0C, add an oil heater or switch to a low-temperature oil. Triple-screw pumps need clean, high-grade oil, so keep filters and oil changes on schedule.<\/p>\n<h2><span style=\"font-weight: 400;\">Selecci\u00f3n del tipo de elevador hidr\u00e1ulico adecuado<\/span><\/h2>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">Al elegir un elevador hidr\u00e1ulico para su aplicaci\u00f3n, debe considerar el peso que debe levantar, la distancia de elevaci\u00f3n y el espacio libre disponible para el uso elegido. Tambi\u00e9n es fundamental considerar su presupuesto. Todos estos detalles le ayudar\u00e1n a determinar qu\u00e9 elevador es la opci\u00f3n adecuada para su aplicaci\u00f3n.\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">La consideraci\u00f3n m\u00e1s importante es el peso a manejar, y el elevador siempre debe superar los requisitos de peso total por un margen c\u00f3modo por razones de seguridad.\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">Consulte con un profesional para determinar el espacio libre disponible para su elevador hidr\u00e1ulico. Elija una unidad que se ajuste al espacio disponible, incluyendo el motor o compresor incluido.\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">El elevador elegido tambi\u00e9n debe proporcionar la distancia de elevaci\u00f3n requerida por su aplicaci\u00f3n. Debe considerar la elevaci\u00f3n m\u00e1xima de la unidad y determinar si el tipo de elevador hidr\u00e1ulico elegido es adecuado para su caso de uso.\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">Es fundamental considerar todos estos elementos y m\u00e1s al elegir un elevador hidr\u00e1ulico para su negocio. Consulte con un profesional para que le ayude a decidir qu\u00e9 elevador es la opci\u00f3n adecuada y a obtener el tipo adecuado.\u00a0<\/span><\/p>\n<p>For a hydraulic elevator, also check travel speed, rated load and your power supply. Single-phase motors go up to 3 kW. Larger units need three-phase power. Send us your load, speed, travel height and voltage, and we can match the power unit, valve block and cylinder.<\/p>\n<h2><span style=\"font-weight: 400;\">Conclusi\u00f3n<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Un elevador hidr\u00e1ulico es una maquinaria impresionante, esencial en cualquier negocio que deba levantar objetos pesados con frecuencia. Al comprender la tecnolog\u00eda, sabr\u00e1 c\u00f3mo aprovechar al m\u00e1ximo los elevadores hidr\u00e1ulicos, elegir el elevador adecuado para su aplicaci\u00f3n y realizar el mantenimiento necesario para que siga funcionando durante muchos a\u00f1os.\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>\n<div class=\"simg-pop-btn\" style=\"position: fixed; top: 3570.73px; left: 248px; display: flex;\" data-hover=\"0\"><\/div>","protected":false},"excerpt":{"rendered":"<p>A hydraulic lift is a device that relies on one or more pressurized pistons to raise a heavy load into the air. Hydraulic lifts are [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","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":"default","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":"","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-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":"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":""},"mobile":{"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":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-14241","post","type-post","status-publish","format-standard","hentry","category-blog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Understanding the Hydraulic Lift and its Function<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hydraflu.com\/es\/comprender-el-elevador-hidraulico-y-su-funcion\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Understanding the Hydraulic Lift and its Function\" \/>\n<meta property=\"og:description\" content=\"A hydraulic lift is a device that relies on one or more pressurized pistons to raise a heavy load into the air. 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