Gasboy Gilbarco Global Pumping Unit Operation Manual Manual do Utilizador descarregar pdf (Página 35)

MDE-4447A Global Pumping Unit Operation and Service Manual · May 2008 Page 31

Vapor Lock Causes Reasons for Vapor Lock

6 – Vapor Lock Causes

Vapor Lock is a problem that results from ambient temperatures, vapor pressure of the product

and installation. It is not a characteristic of a pump.

Reasons for Vapor Lock

Atmospheric Pressure

Atmospheric Pressure of 14.7 PSI (sea level) presses on the liquid in the tank. See Figure 6-1.

Figure 6-1: Atmospheric Pressure

Atmospheric

Pressure (14.7 PSI)

60º F

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Gasboy Gilbarco Global Pumping Unit Operation Manual Manual do Utilizador Página 35