What is a valve key?
What is a valve key?
noun A form of socket-wrench having a T-head, or other shape resembling the winding-key of a clock, which fits the squared or prismatic shape on the end of a valve spindle. It is designed for use where the valve should not be opened or shut except by one duly authorized and possessing such a key or wrench.
What is a key valve used for?
key valves are used to provide the end user the ability to adjust the burner flame to the desired height and as a secondary means of shut-off.
What is the key on the map?
Definition: A key or legend is a list of symbols that appear on the map. For example, a church on the map may appear as a cross, a cross attached to a circle, a cross attached to a square.
How deep is a curb stop valve?
roughly six feet
The curb stop is located roughly six feet underground. To turn the valve, a curb key is needed. Though deep in the ground, it should be relatively easy to move.
What are examples of key?
The definition of a key is a metal instrument used for opening and closing a lock or operating a mechanical device. An example of key is what people use to open their car doors and start the engine.
What is the purpose of a curb stop?
A curb stop is a water control valve, located on the property line of most private dwellings or commercial properties. Its purpose is to facilitate the isolation of water supply to the customer.
What kind of valve is a curb stop?
underground water shutoff valve
For all of these reasons, a curb stop is often referred to as an underground water shutoff valve. The curb stop water valve is accessed with a special wrench or key, which slides down the pipe and turns the valve on or off.
What are the pneumatic symbols in process valves?
Pneumatic Symbols DIRECTIONAL CONTROL VALVES PROCESS VALVES DESCRIPTION IMAGE DESCRIPTION IMAGE 2/2- way valve, air operated, NC Angle valve, 2-way 2/2- way valve, direct operated, NC Ball valve, 2- way 2/2- way valve, pilot operated, NC Ball valve, 3- way, L 3/2- way valve, air operated, NC Ball valve, 3- way, T
How are valves represented in a P & ID diagram?
The type of valve is represented by adding a shape to the center where the points touch. Shown here are P&ID symbols for the most common valve types. All of the valves represented above are 2-way inline valves that are used for flow control, either on/off or throttling.
What do you need to know about a map key?
The map key is what gives you all the information you need for a map to make sense. But first, what exactly is a map? It is a way that we can show different parts of Earth in two dimensions. Maps can show large areas, like the entire planet, or very small areas, like your neighborhood.
What kind of valves are used for flow control?
All of the valves represented above are 2-way inline valves that are used for flow control, either on/off or throttling. For Multi-port valves, such as 3-way and 4-way, the structure of the symbol is similar, having a triangle to represent each port or “way”.