A New Pulse in Bag Houses

You may have heard about a new pulse valve design from Dwyer in the past few months. While many of these valves physically do not look different, the internal components have changed. This new design allows for easier maintenance, as well as improved reliability.

Pulse valves have always been used in dust collection bag house systems. The purpose of this valve is to provide a quick short burst of air to release particulate that is collected on the cartridge filters, used in a dust collection system. The valve is typically mounted to a manifold that would provide the needed air pressure. On most collectors you will see one valve per cartridge filter. The picture to the right displays a typical collector, filter, and valves mounted at the top of the system.

The pulse valves are typically controlled by a timer control board, such as the Dwyer Series DCT600 or DCT500A, or a programmable logic controller (PLC). The timer board will cycle through each valve once a predetermined pressure drop across the filters is reached, relieving particulate from the filters to maintain a low differential pressure. Through the use of pulse valves and a timer control board, a user can maintain their system at optimum conditions allowing for longer life out of the cartridge filters.

To better service dust collectors, we have released our Series DCS and RDCS Springless Diaphragm Valves. These valves combine a new springless diaphragm technology into our previous valve housing.  A springless diaphragm valve combines the spring typically used for controlling the diaphragm and the valve into a single component; Dwyer uses a thermoplastic polyurethane diaphragm. The combination of these two components into a single diaphragm allows for easier field service and replacement. With using an elastomer diaphragm for air pulse control, this allows for a more reliable and consistent pulses versus the previous spring style which can change as the spring ages.

To allow for all types of systems, the DCS and RDCS pulse valves are configured with both NPT process connections and coupling connections for a quicker installation. The valves can also be purchase with an integral coil/solenoid or a remote mount unit, where a solenoid valve would need to be mounted in a separate enclosure.

For more information on pulse valves or any Dwyer product, please visit www.dwyer-inst.com or call 1.800.872.9141 to speak to a technical engineer.