A valve assembly owning an attachment system welded into the projection in a location spaced radially outwardly from the leading system part, thereby facilitating welding and/or inspection from the weldment. wherein the bellows provides a radially inward portion sealingly connected to a radially inward portion of the valve member, as http://valves-and-fittings91122.suomiblog.com/5-essential-elements-for-monoflange-9602033