A ______ filter is designed to handle the full pressure of the hydraulic system. It uses a replaceable cartridge and is enclosed in a metal casing called a bowl.

• A. Pressure Line Filter
• B. Cartridge type filter
• C. Spin-on filter
• D. Suction line filter

Answer: (A)

In hydraulic systems, the filter that is built to withstand the full system pressure is the one placed in the pressure line. This filter uses a replaceable cartridge inside a sturdy metal housing, commonly called a bowl. The bowl protects the cartridge from the high pressure of the circuit and allows you to change the cartridge without removing the entire assembly or depressurizing the line. This design is specifically meant for inline filtration where the fluid is under pump pressure, ensuring contaminants are captured before the fluid powers the next stage of the system.

Suction line filters sit on the pump’s intake and aren’t designed to handle the same high pressure, so they use different housings and configurations. Spin-on filters are a different style where the entire canister/screen unit is replaced rather than a cartridge inside a bowl. The term cartridge type filter is more generic and can refer to filters used in various housings, but the distinctive bowl-enclosed, full-pressure inline setup described here points to the pressure line filter.