yes, a gate valve is designed to operate in the fully opened or fully closed positions,globe and ball valves can be used to throttle flow.
Isolation valves are used for diverting process media, facilitating maintenance, equipment removal and shutdown. The operation, application and construction of gate, globe, piston and diaphragm valves are studied in this tutorial.
What is the difference between a service & isolation valve? Service & Isolation valves are an essential part of a bathroom suit. Both valves are available in a straight or bent form and can come rigid or flexible on a short pipe. In the UK, the fittings come in a 15 or 22mm size and varies from country to country. Remember to place a fibre washer in the service valve!
The isolation valve should (must) be placed on the cold water side (and/or the return side), entering the water heater. Placing the isolation valve on the hot or outlet side of the water heater has the potential of creating a bomb.
No, U cnnot accomodate it without pipe sppol, because of isolation.
Stop Boiler Valve (or Crown Valve) is installed on an outlet line of a boiler. It's purpose is isolation of a boiler from a downstream steam line. Its position may be either open or close, it cannot be used for throttling of steam.
Term "production" means outflow from well. Master valve and wing valve are both on X-mas trees installed above wellhead. Fluid comes to the surface will pass Master (main isolation) valve first, then to the wing valve. Afterwards, go to the choke valves for pressure control before directing to downstream process.