Gate valves either allow or bar the passage of hydraulic fluid, and globe valves adjust the flow of hydraulic fluid between fully on and fully off. Gate valves are plate-like, and globe valves are circular.
According to Fine Homebuilding, gate valves mediate flow through the raising or lowering of the gate, which is operated by a wheel. Corrosion can severely damage gate valves and eventually render them useless, which is why the valve should never be left partially open or shut. Unlike globe valves, gate valves cannot be repaired and must be replaced if damage occurs. According to Mountain Empire Community College, both valves are accompanied by a mechanical device used for opening and closing called a stem and bonnet, except this device is used to regulate or throttle the flow in globe valves. The Pennsylvania Department of Environmental Protection states that globe valves operate slowly to avoid fluid hammer, similar to gate valves. Additionally, GlobalSpec cites the speed and precision of globe valves and mentions the low coefficient flow and heavy weight of the device. Globe valves are seen in systems with vacuums, gas, liquid and wide-ranging temperatures. According to Bright Hub Engineering, both valves can be tested similarly with water and air.