Mechanical Valves

Have you tried Google?

Google? Bing? Ask.com? List where you have looked and I will suggest some more.

Get some pipe/valve/fittings catalogs. You can learn a lot from a catalog. Everything I know about anything onboard a ship, I learned by being on that ship. A walk through with someone who knows, is usually enough to be able to identify the various working parts of a ship. It's a hands-on thing. These are things that are part of the learning experience. You see something; you identify it; you look it up in a catalog and read about it. The combination of visual and reading registers in your brain, so when someone tells you it's a solenoid operated valve for 600 psi service, you will know what he's talking about. Don't sweat over it. It will come to you with more experience.

What we have here is failure to communicate.

Our old friend, joganand,

He has asked his question, that will be the last we hear of him in this thread.

BTW friend, just how does transformer manufacture fit in with a life at sea?

Its a "see it's live transformer"!