Valves can come in many shapes and sizes and are used in most every industry in ever sector. A valve is a device that regulates the flow of liquids, gases and fluids through passages. Valves are commonly used in power generation, the petrochemical industry, paper and pulp, mining and minerals and refining.
Below are a few common types of valves and their uses -ball valve
A ball valve has a spherical disc within the component that controls the flow through the valve. In a ball valve, the inner disc, or ball, contains a hole. When the hole is lined up parallel with the valve ends, the ball valve is open and fluids can flow through the valve. When the hole is perpendicular to the valve ends, the ball valve is closed and the flow is stopped. ball valves are common to many heavy-duty projects because they are extremely durable. Ball valves are also known for their excellent sealing capabilities. Ball valves boast near-perfect shut-off which makes them perfect for applications that require the complete shut-off of flow through valves. Another great feature of the ball valve is that it is easily repaired.
Never ever use a Gate type of valve for throttling ONLY a globe pattern is designed for this purpose and a needle valve
diaphram valve
What to use to solder a shut off valve
Flare copper pipe and use a flared shutoff valve. If valve isn't flared, use an adapter fitting between copper flared pipe and valve.
I would use a butterfly valve to set the flow and a pitot tube to measure it. Nexus Valve makes a good one and it is price competetive as well.
YES you can my instructor and i have a silver trumpet and we use valve oil if you don't have oil use saliva {spit}
To use a sillcock frost-free valve, first turn off the water supply to the valve. Then, open the valve by turning the handle counterclockwise to allow water flow. After use, close the valve by turning the handle clockwise to stop water flow and prevent freezing in cold weather.
Back water valve
what is the proper procedures for cheking and adjusting the needle valve
Valve springs keep valves firmly seated in the socket.
no it can't , valves you can use are a prv pressure reducing valve or a globe or flow valve
Low pressure valve.