If the purpose of the valve is to modulate flow, a globe valve is preferable. If the valve is only on-off, a gate valve is preferable because of lower pressure drop when the valve is open. As...
Spool. you can tell easily between spool and poppet, because a poppet valve has a visible bolt with a cocking lever on in, whereas spools have no external bolt. Look ate the planet eclipese EGO and...