主权项 |
1. A diaphragm valve, comprising:
a valve body comprising a valve cavity, a first port and a second port, said first port and said second port being open to said valve cavity, a valve assembly disposed to seal said valve cavity, said valve assembly comprising a valve seat, a seat carrier and a diaphragm, said valve seat being retained with said seat carrier and said diaphragm being attached to a first side of said seat carrier by a weld, said valve seat being disposed to surround said first port, said valve seat comprising a flow passage in fluid communication with said first port. |