Assertion: flexible diaphragm | /r/CapableOf | form boundary of the valve
Facets:
Source sentences:
text: A) consist of a rigid body formed with a weir placed in the flow path, a flexible diaphragm which forms the upper pressure boundary of the valve, a compressor which is used to force the diaphragm against the weir, and the bonnet and handwheel which secure the diaphragm to the body and actuate the compressor.