The 3233 manually-operated diaphragm valve in compact form consists of a flow-optimised cast stainless steel body with various surface finishes, a diaphragm and a manual actuator.The material combinations are selectable. The diaphragm is both a switch element and a sealing element to the outside. It can be easily replaced. The flow can be continually adjusted with the manually actuator. The valves have no dead volume and can be mounted to be self-draining. This enables high flow capacities and a variety of applications to be realized. The valves are autoclavable.