{"id":2917,"date":"2024-03-06T14:34:56","date_gmt":"2024-03-06T13:34:56","guid":{"rendered":"https:\/\/www.bf-hydraulik.com\/encyclopedia\/cartridge-valves\/"},"modified":"2026-04-15T11:54:16","modified_gmt":"2026-04-15T09:54:16","slug":"cartridge-valves","status":"publish","type":"encyclopedia","link":"https:\/\/www.bf-hydraulik.com\/en\/cartridge-valves\/","title":{"rendered":"Cartridge Valves"},"content":{"rendered":"\t\t
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Cartridge Valves<\/strong><\/h1>

Cartridge valves<\/a> do not have a housing, as the valve’s internal components are screwed directly into the hydraulic system<\/a>. The housing is replaced by corresponding recesses in the valve block. <\/p>

An exemplary application is the connection with a directional control valve<\/a>. In this connection, the control spool is attached to the actuator with the help of the valve. The following describes five exemplary application areas for cartridge valves<\/a>. <\/p>

Cartridge Valves – Application in Check Valves<\/h2>

Cartridge valves<\/a> are found in a wide variety of applications. One area of application for cartridge valves<\/a> is in check valves<\/a>. These are characterized by a spherical poppet and a low-leakage design. This type of valve results in only a small pressure drop in the hydraulic system<\/a>. Furthermore, cartridge valves<\/a> as check valve<\/a>s exhibit very good tolerance to contamination and a high flow capacity. The average maximum inlet pressure for this type of hydraulic connection technology is 350 bar with a flow rate of up to 300 liters per minute. Check valve<\/a>s are available in various designs as seat valves or ball valves. In addition, there are pilot-operated cartridge valves<\/a> and control spools in check valve<\/a>s. <\/p>

Cartridge Valves – Application as Shuttle Valves<\/h3>

While the ball design offers good tolerance to contamination, the flow capacity of the spool type is significantly higher. The spool type is suitable for use as a flushing valve in various transmission applications. <\/p>

Cartridge Valves – Application as Load Holding Valves<\/h3>

Load holding valves are usually equipped with a lowering brake mechanism. This gives them a very compact design. They function very stably compared to other valves and are easy to control. Users can choose between different control ratios for the lowering brake design. <\/p>

Cartridge Valves – Application as Flow Control Valves<\/h3>

Needle-type flow control valves have a high flow capacity with a very compact design. However, these valves are very sensitive to operate. Due to the pressure-compensating effect, the pressure in the hydraulic system<\/a> changes only minimally, even with high pressure fluctuations. <\/p>

Cartridge Valves – Application as Flow Dividers<\/h3>

Pressure-compensated flow divider<\/a>s or flow combiners can utilize the pressure-compensated property in both dividing and combining modes.<\/p>

Cartridge Valves – Application as Pressure Relief Valves<\/h3>

Cartridge valves<\/a> with pressure relief function are available in six basic designs. Directly acting pressure relief valve<\/a>s are almost leak-free due to the screw connection. They react quickly and are stable across the entire flow range. The pressure range is variable and, depending on the design, is approximately 5 to 500 bar. <\/p>

Differential area-controlled pressure relief valve<\/a>s are characterized by a linear and equally very fast response. If cartridge valves<\/a> with pressure relief function and high flow capacities are required, pilot-operated cartridge valves<\/a> are particularly suitable. These valves are available with tank venting and back pressure functions with uniform return flow. <\/p>

Relievable pressure relief valve<\/a>s are particularly well suited for hydraulic system<\/a>s where rapid pressure relief is required. This can, for example, relieve pressure from a pump. The cross-over design can relieve the hydraulic system<\/a> in both directions. This design is characterized by high flow capacity and a relatively low price. <\/p>

Furthermore, there is a special design for accumulator discharge circuits, which has a fixed pressure differential between the opening and closing of the valve.<\/p>

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