{"id":2800,"date":"2024-03-07T14:36:29","date_gmt":"2024-03-07T13:36:29","guid":{"rendered":"https:\/\/www.bf-hydraulik.com\/encyclopedia\/ball-check-valve\/"},"modified":"2026-04-15T11:53:00","modified_gmt":"2026-04-15T09:53:00","slug":"ball-check-valve","status":"publish","type":"encyclopedia","link":"https:\/\/www.bf-hydraulik.com\/en\/ball-check-valve\/","title":{"rendered":"Ball check valve"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"2800\" class=\"elementor elementor-2800 elementor-881\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-735b55f8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"735b55f8\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-2820cb8b\" data-id=\"2820cb8b\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9fb9997 elementor-widget elementor-widget-text-editor\" data-id=\"9fb9997\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h1>Ball check valve for pressure protection<\/h1><p>In hydraulics and pneumatics, a <a href=\"https:\/\/www.bf-hydraulik.com\/en\/ball-check-valve\/\" target=\"_self\" title=\"Ball check valve for pressure protectionIn hydraulics and pneumatics, a ball check valve is a simple component used to regulate a volume flow. Its technically simple design makes it a&hellip;\" class=\"encyclopedia\">ball check valve<\/a> is a simple component used to regulate a volume flow. Its technically simple design makes it a very cost-effective and popular component. Another name for the <a href=\"https:\/\/www.bf-hydraulik.com\/en\/ball-check-valve\/\" target=\"_self\" title=\"Ball check valve for pressure protectionIn hydraulics and pneumatics, a ball check valve is a simple component used to regulate a volume flow. Its technically simple design makes it a&hellip;\" class=\"encyclopedia\">ball check valve<\/a> is the &ldquo;ball check fitting.&rdquo; It is related to ball valves, but not to &ldquo;ball cocks.&rdquo; The frequent designation of the latter as a &ldquo;ball valve&rdquo; is technically incorrect and should be avoided.     <\/p><h2>Function of ball check valves<\/h2><p>As the name suggests, the primary function of the <a href=\"https:\/\/www.bf-hydraulik.com\/en\/ball-check-valve\/\" target=\"_self\" title=\"Ball check valve for pressure protectionIn hydraulics and pneumatics, a ball check valve is a simple component used to regulate a volume flow. Its technically simple design makes it a&hellip;\" class=\"encyclopedia\">ball check valve<\/a> is to prevent the backflow of a volume flow. It is therefore primarily a standard <a href=\"https:\/\/www.bf-hydraulik.com\/rueckschlagventil.html\">check valve<\/a>, such as those found in the simplest hydraulic designs, for example, jacks or pallet trucks. In contrast to the flap <a href=\"https:\/\/www.bf-hydraulik.com\/en\/check-valve\/\" target=\"_self\" title=\"Check ValveA check valve allows the flow of the medium to pass through in only one direction. In most applications, the medium is a fluid, hydraulic fluid, or gas. In&hellip;\" class=\"encyclopedia\">check valve<\/a>s commonly used there, the <a href=\"https:\/\/www.bf-hydraulik.com\/en\/ball-check-valve\/\" target=\"_self\" title=\"Ball check valve for pressure protectionIn hydraulics and pneumatics, a ball check valve is a simple component used to regulate a volume flow. Its technically simple design makes it a&hellip;\" class=\"encyclopedia\">ball check valve<\/a> works with a steel ball. A fundamental distinction is made between two designs:   <\/p><ul><li>Gravity <a href=\"https:\/\/www.bf-hydraulik.com\/en\/ball-check-valve\/\" target=\"_self\" title=\"Ball check valve for pressure protectionIn hydraulics and pneumatics, a ball check valve is a simple component used to regulate a volume flow. Its technically simple design makes it a&hellip;\" class=\"encyclopedia\">ball check valve<\/a>s<\/li><li>Spring-loaded <a href=\"https:\/\/www.bf-hydraulik.com\/en\/ball-check-valve\/\" target=\"_self\" title=\"Ball check valve for pressure protectionIn hydraulics and pneumatics, a ball check valve is a simple component used to regulate a volume flow. Its technically simple design makes it a&hellip;\" class=\"encyclopedia\">ball check valve<\/a>s<\/li><\/ul><h3>Gravity ball check valves<\/h3><p>Gravity <a href=\"https:\/\/www.bf-hydraulik.com\/en\/ball-check-valve\/\" target=\"_self\" title=\"Ball check valve for pressure protectionIn hydraulics and pneumatics, a ball check valve is a simple component used to regulate a volume flow. Its technically simple design makes it a&hellip;\" class=\"encyclopedia\">ball check valve<\/a>s consist of a vertically arranged hydraulic line with a constriction. The ball is located above the constriction. The volume flow coming from below pushes the ball to the side and can continue to flow upwards. When the volume flow is interrupted, the ball rolls back into the constriction and thus seals it hermetically. The hydraulic fluid can then no longer flow downwards.    <\/p><h3>Spring-loaded ball check valves<\/h3><p>In spring-loaded <a href=\"https:\/\/www.bf-hydraulik.com\/en\/ball-check-valve\/\" target=\"_self\" title=\"Ball check valve for pressure protectionIn hydraulics and pneumatics, a ball check valve is a simple component used to regulate a volume flow. Its technically simple design makes it a&hellip;\" class=\"encyclopedia\">ball check valve<\/a>s, the ball is clamped in a coil spring. The volume flow must first overcome the spring force of the coil spring before it can flow past the ball. This requires a certain hydraulic pre-pressure. If the <a href=\"https:\/\/www.bf-hydraulik.com\/en\/hydraulic-pressure\/\" target=\"_self\" title=\"Hydraulic Pressure ExplainedPressure is generally a force acting on a surface. Hydraulic pressure is accordingly a force transmitted through a fluid that acts on the internal walls of a hydraulic&hellip;\" class=\"encyclopedia\">hydraulic pressure<\/a> drops below the required pre-pressure, the spring closes the passage again with the ball.   <\/p><h3>Advantages and disadvantages of spring-loaded or gravity ball check valves<\/h3><p>Gravity <a href=\"https:\/\/www.bf-hydraulik.com\/en\/ball-check-valve\/\" target=\"_self\" title=\"Ball check valve for pressure protectionIn hydraulics and pneumatics, a ball check valve is a simple component used to regulate a volume flow. Its technically simple design makes it a&hellip;\" class=\"encyclopedia\">ball check valve<\/a>s have several disadvantages compared to spring-loaded <a href=\"https:\/\/www.bf-hydraulik.com\/en\/ball-check-valve\/\" target=\"_self\" title=\"Ball check valve for pressure protectionIn hydraulics and pneumatics, a ball check valve is a simple component used to regulate a volume flow. Its technically simple design makes it a&hellip;\" class=\"encyclopedia\">ball check valve<\/a>s: they must always remain in a vertical position. This makes them primarily applicable to stationary <a href=\"https:\/\/www.bf-hydraulik.com\/en\/hydraulic-system\/\" target=\"_self\" title=\"Hydraulic system: design &amp; applications explained simplyA hydraulic system is used to apply large forces in a targeted manner over a defined distance with minimal effort. The underlying hydraulic principle&hellip;\" class=\"encyclopedia\">hydraulic system<\/a>s. In mobile systems, the function of gravity <a href=\"https:\/\/www.bf-hydraulik.com\/en\/ball-check-valve\/\" target=\"_self\" title=\"Ball check valve for pressure protectionIn hydraulics and pneumatics, a ball check valve is a simple component used to regulate a volume flow. Its technically simple design makes it a&hellip;\" class=\"encyclopedia\">ball check valve<\/a>s would be significantly impaired even by slight inclinations of the machine. Furthermore, only a very small force is required to overcome the gravity of the closing ball. This makes gravity <a href=\"https:\/\/www.bf-hydraulik.com\/en\/check-valve\/\" target=\"_self\" title=\"Check ValveA check valve allows the flow of the medium to pass through in only one direction. In most applications, the medium is a fluid, hydraulic fluid, or gas. In&hellip;\" class=\"encyclopedia\">check valve<\/a>s rather unsuitable for complex hydraulic circuits with regulatory functions.    <\/p><p>Spring-loaded <a href=\"https:\/\/www.bf-hydraulik.com\/en\/check-valve\/\" target=\"_self\" title=\"Check ValveA check valve allows the flow of the medium to pass through in only one direction. In most applications, the medium is a fluid, hydraulic fluid, or gas. In&hellip;\" class=\"encyclopedia\">check valve<\/a>s can be used in any direction. This makes them the preferred design for mobile <a href=\"https:\/\/www.bf-hydraulik.com\/en\/hydraulic-system\/\" target=\"_self\" title=\"Hydraulic system: design &amp; applications explained simplyA hydraulic system is used to apply large forces in a targeted manner over a defined distance with minimal effort. The underlying hydraulic principle&hellip;\" class=\"encyclopedia\">hydraulic system<\/a>s. Due to the pre-tensioning of the spring, the <a href=\"https:\/\/www.bf-hydraulik.com\/en\/hydraulic-system\/\" target=\"_self\" title=\"Hydraulic system: design &amp; applications explained simplyA hydraulic system is used to apply large forces in a targeted manner over a defined distance with minimal effort. The underlying hydraulic principle&hellip;\" class=\"encyclopedia\">hydraulic system<\/a> can be designed to be more complex. For example, by connecting spring-loaded <a href=\"https:\/\/www.bf-hydraulik.com\/en\/check-valve\/\" target=\"_self\" title=\"Check ValveA check valve allows the flow of the medium to pass through in only one direction. In most applications, the medium is a fluid, hydraulic fluid, or gas. In&hellip;\" class=\"encyclopedia\">check valve<\/a>s with different pre-tensions in parallel, it is possible to activate different subsystems as the <a href=\"https:\/\/www.bf-hydraulik.com\/en\/hydraulic-pressure\/\" target=\"_self\" title=\"Hydraulic Pressure ExplainedPressure is generally a force acting on a surface. Hydraulic pressure is accordingly a force transmitted through a fluid that acts on the internal walls of a hydraulic&hellip;\" class=\"encyclopedia\">hydraulic pressure<\/a> increases.   <\/p><h3>Defects in ball check valves<\/h3><p><a href=\"https:\/\/www.bf-hydraulik.com\/en\/ball-check-valve\/\" target=\"_self\" title=\"Ball check valve for pressure protectionIn hydraulics and pneumatics, a ball check valve is a simple component used to regulate a volume flow. Its technically simple design makes it a&hellip;\" class=\"encyclopedia\">Ball check valve<\/a>s are located at critical points. With high pre-tensioning of the compression spring, a correspondingly high pressure is required to overcome it. As soon as the spring force is overcome and the ball is lifted, the hydraulic oil shoots past the ball at high pressure. This can lead to abrasion damage or <a href=\"https:\/\/www.bf-hydraulik.com\/en\/cavitation\/\" target=\"_self\" title=\"Cavitation in Hydraulic Systems: Internal DestructionAfter oil contamination, cavitation is one of the most common causes of damage in hydraulic systems. It occurs when hydraulic components are not optimally matched&hellip;\" class=\"encyclopedia\">cavitation<\/a>. It is therefore always recommended to check <a href=\"https:\/\/www.bf-hydraulik.com\/en\/ball-check-valve\/\" target=\"_self\" title=\"Ball check valve for pressure protectionIn hydraulics and pneumatics, a ball check valve is a simple component used to regulate a volume flow. 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