Patent ID: 6505813
Filing Date: 2003-01-14
Classification: F16K

Abstract:
A method for installing a valve assembly between opposed pipe ends, the method comprising the steps of:engaging a first pipe coupler upon a first pipe end, joining the first pipe coupler to the first pipe end in leak-tight relationship by sweating at a predetermined sweating temperature, engaging a second pipe coupler with a second pipe end, joining the second pipe coupler to the second pipe end in leak-tight relationship by sweating at a predetermined sweating temperature, thereafter, placing a valve subassembly between the first pipe coupler and the second pipe coupler, the valve subassembly including a valve body defining an inlet and an outlet and a passageway for flow of fluid from the inlet toward the outlet, a valve element disposed within the valve body for movement between a first position allowing flow of fluid from the inlet toward the outlet and a second position resisting flow of fluid form the inlet toward the outlet, and valve components susceptible to thermal damage at a damage temperature below the predetermined sweating temperature, engaging a first attachment member in leak-tight threaded engagement with the valve body at the inlet in a manner to secure the first pipe coupler to the valve body, and engaging a second attachment member in leak-tight threaded engagement with the valve body at the outlet in a manner to secure the second pipe coupler to the valve body.