Diaphragm control valve

The pneumatically operated plastic body type 2730 diaphragm valve comprises hermetical separation of fluids from the operating mechanism by the diaphragm, and is rated for use with potable water and for sterile to aggressive applications.

The valve is also available in stainless steel and is suited to processes with a frequently changing controlled flow rate, and is engineered for ease of use with a pneumatically operated piston actuator for defining stroke.

Available in a variety of body materials, including PVC, PP, PA and PVDF, and EPDM, PTFE seals, the valve operates with media to 120°C and to 7 bar and is rated for operation with viscous media.

The valve is suited to standalone operation, and is also designed for trouble-free inclusion in a customised modular component or as a building block in a comprehensive water or waste system. The unit can be actuated by top or side control positioners, TopControl 8630, SideControl 1067 or SideControl 8635, for continuous regulation.

The valve has an optional, integrated PID controller to enable linking with flow, level, pressure or temperature sensors to perform standalone process control.

Another option is the integration of fieldbus networks, which include DeviceNet and Profibus. This option allows for standalone control, with communication back to a central system to receive a setpoint and reply with process information, valve position, etc. This proves cost-effective in applications where multiple valves are required.