What is the classification of a spring detent valve?

Spring detent valves are classified as poppet valves, specifically as spring-loaded poppet valves. Poppet valves are a type of valve that uses a mushroom-shaped or ball-shaped valve element to control the flow of fluid. Spring-loaded poppet valves incorporate a spring mechanism to keep the valve closed until a certain pressure or force is applied, at which point the spring compresses and the valve opens.