Swagelok, GS Anderson
Swagelok GS Anderson 1P24-Kit EPDM Diaphragm for 1-1/2'' DN 40 Weir Style Valves
You will find that Siemens equipment holds its value well over time.
Swagelok GS Anderson 1P08-Kit EPDM Diaphragm for 1/2'' DN15 Weir Style Valve 1P8
What stands out about Thyssenkrupp is the thick steel used in their frames and housings.