| 摘要 |
A centrally bored and counterbored valve body is secured at one end to a refrigerant line. The line connected end of the valve body contains a normally closed valve core having a stem spring biased to close the valve core. The other end of the valve body contains a mandrel moveable toward and away from the valve core stem for opening and closing the latter. The mandrel contained end of the valve body is surrounded by a cap, containing a sealing ring, manually moved threadedly on the valve body for biasing the mandrel against the valve core stem to open position and sealing with the adjacent end of the valve body. At least one refrigerant outlet service valve is connected with the valve body through a valve body lateral port communicating with the valve body counterbore surrounding the mandrel.
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