Please Define
Cavitation
When a flowing liquid goes below it's Vapor Pressure and recovers back above the Vapor Pressure.
A valve that flies
Butterfly
Valero Corporaton founded
1980
Allowable DBA per OSHA
85
plus define OSHA
Type of valve with lowest delta P when fully open
Full ported ball valve - tunnel bore
Flashing
When a flowing liquid goes below it's Vapor Pressure and stays below the Vapor Pressure on recovery.
A gate valve that cuts
Knife Gate
Valero Energy Corporation founded
1997
Flow that has entrained solids
slurry
Fisher, Valtek, Masoneliean Actuator Colors
Green, White, Red
Vena Contracta
The flow at its highest velocity and lowest pressure.
The "Worldly Valve"
Globe Valve
Valero Eng Corp purchased Benicia
2000 from Exxon
Flow that is a combination of liquid and gas
Two Phase
3 main CV characteristics
Equal Percentage - Linear - Quick Opening
CV Definition
The number of gallons of water per minute that flow across an orifice with a 1 pound pressure drop.
US gallons at 60 F
The sharpest of all valves
Needle Valve
Where does the name Valero come from
Mission San Antonio de Valero
The mission in the Alamo
Is a liquid with high viscosity "thick or thin?"
Thick
Define Choked Flow
An increase in pressure drop no longer results in flow rate increase
CV Equation
Flow (Q) x's Square Root of S.G./Delta P
Valve that shares the name of a common type of pump
Diaphragm Valve.
How many refineries does Valero own
15
US, Canada and GB
Define Design P&T vs Op P&T
Operating = actual P&T valve sees day to day
Design = what the valve "could" see worst case
Define Rangeability
The ratio of max controlable flow to min controlable flow