In refrigeration and air conditioning applications, there are two main types of expansion valves: thermostatic expansion valves (TXVs), and automatic, or constant-pressure, expansion valves (AXVs).

A preliminary report on the Air India crash that killed 260 people has revealed critical details about the events leading to the disaster. It identified mid-air engine shutdowns and cockpit confusion ...

Pneumatic servo actuators have the benefits of low-cost, cleanliness and a high power-to-weight ratio. However, their relatively poor accuracy prevents them from competing with electro-mechanical ...