Regulator and Air-Actuated Valve Team Up to Eliminate Pressure Fluctuation

In this chemical bulk handling application, a ball-type check valve was specified as a foot valve to provide continuous pump prime. The centrifugal pump will not self-prime, and if it runs dry will result in seal failure. Prolonged operation in a dry condition is likely to result in catastrophic failure.

Crop fertigation piping systems typically deliver precise batches of nutrients to crops through a supply line, and remove overflow via a drain/flush line. Although system parameters vary from site to site, a typical installation uses a mix of water and nutrients between 30-90º F.

The illustration shows two pressure control valves. These are very similar but for the fact that one is normally-open and the other is normally-closed. The primary difference between the valves is the location of main orifice in relation to the spring, piston, and valve seat (or seal). Because these valves use liquid pressure to automatically overcome the pre-set spring force, the liquid moves the normally-closed valve to open, and the normally-open valve to close.

The two most important concerns of any ultra-pure water treatment and distribution system are:

The Pulsation Dampener, also known as a Surge Suppressor will steady a pulsing flow caused by diaphragm pumps, piston pumps, peristaltic pumps and other quick flow interrupting equipment. The PDS will steady a vibrating pointer of a pressure gage or flow meter under flowing conditions.

With engineering, manufacturing, assembly and programming all provided exclusively by Plast-O-Matic, CAFE actuators are available with a wide range of voltage and performance options, as well as mounting and connections for virtually any valve requiring torque up to 20 Nm.