Under Pressure
An acronym for the most common unit of pressure.
What is PSI?
This 'sporty' quarter-turn valve type is one of the most common.
What is a ball valve?
This type of valves is used to the backflow of fluid in a system by closing automatically.
What is a Check Valve?
A quarter-turn valve with a single right-angle change in flow, often used to serve appliance connections.
What is an angle stop?
Material packed into a valve to create a leakproof seal at the stem.
What is packing?
A type of valve which reduces the pressure of a fluid in a system.
What is a regulator or pressure reducing valve?
This 'airborne' valve is commonly sandwiched between two flanges.
What is a butterfly valve?
Not a wye strainer, this valve is dependent on gravity for it's function.
What is a Swing Check?
A type of ball valve that does not narrow in ID.
What is a full port ball valve?
The surface of a valve which actually makes the seal against the flow of water.
What is a valve seat?
Valves often have two pressure rating: One for WOG (Water, Oil, Gas), as well as well as one for this.
What is SP (Steam Pressure)?
This 'worldy' valve offers good flow control at a low cost.
What is a globe valve?
What is a spring check valve?
A valve that can divert flow into two or more different outlets.
What is a multiport valve?
The valve part that must be disconnected to service the valve's internals.
What is a bonnet?
What is PSIA (Pounds per Square Inch Absolute)?
This 'sharp' valve offers fine flow control.
What is a needle valve?
Rather than 'closing' to prevent liquid from flowing back, this type of valve opens to release water when pressure drops.
What is a vacuum breaker?
A valve that can be used to moderate flow, often electronically actuated.
What is a control valve?
What is a diaphragm?
The maximum pressure at which T&P valves are designed to automatically open.
Not quite a porticullis, this positive shut-off valve is a poor choice for flow control.
What is a gate valve?
Generically known as a 'Backflow Preventer', this type of assembly most commonly guards the water supply.
What is a Reduced Pressure Principle Backflow Preventer?
What is a Wafer Valve?
This part helps to compress the packing of a valve, especially suitable for higher pressure service.
What is a gland?