Diaphragm valve, a best solution for high purity applications including pharmaceutical and bio-processing. There is stainless steel bonnet and PPS bonnet for choice. The PPS bonnet comes with position-adjustable handle, to protect the diaphragm having a longer working time. The diaphragm is mainly offered with EPDM+PTFE, could be used at a temperature above 130 centigrade degree. Size range from 1/2” to 2.5” available, could be offered with both manual and pneumatic driven.