| 摘要 |
<p>A four-way valve for heat exchangers and hot water heaters comprising a valve seating housing which includes a hot water inlet opening at one end and a hot water return opening at the other end thereof; a valve guide integrally formed with the housing and disposed about the hot water return opening; and a plurality of spaced-apart, adjacent apertures disposed in a radial arrangement in said housing between said openings thereof. A valve housing head is mounted on the valve seating housing and couples a plurality of heating supply and drain pipes thereto. A hot water pipe from the hot water heater is disposed within the valve guide in the hot water return opening of the valve seating housing to couple the valve to the heater. Valve seats are disposed in the housing and valve head, and are engaged by end members formed on the end of a valve body slidably disposed on the valve guide. A rotatable adjustment head is coupled to the valve body for controlling the flow of water through the valve.</p> |
