Pressure holding valves

Pressure Holding Valves Velocity control improves air quality KAESER’s pressure holding valves prevent damage and increase the effectiveness of air treatment equipment by reducing exposure to excessive velocity. The pressure holding valve automatically opens and closes to maintain a set minimum pressure in the supply side of the air system while pressurizing the main distribution piping. It also pressurizes the entire system in the shortest possible time.

Why your system needs a DHS pressure Air quality protection holding valve A pressure holding valve controls high velocity air while an Compressed air dryers and filters are designed and rated to treat air system is being pressurized. After the air system has been specified volumes of air at specific conditions. Refrigerated and pressurized, the pressure holding valve also prevents exposure of desiccant dryers, for example, are rated to achieve a specified air treatment components to possible overflow conditions.

dew point at a particular volume (scfm), pressure (100 psig), Leaks, artificial demand, and unregulated uses all affect the total compressed air temperature (100°F), and ambient temperature demand for air. When this total demand reduces the system (100°F). pressure, the increased air velocity may greatly reduce the If system pressure is not constant, the air velocity through clean effectiveness or damage the air treatment components.

A DHS air treatment equipment will fluctuate. For those operating 24 pressure holding valve prevents this condition, ensuring that hours a day, fluctuation may be minor. If, however, compressors dryers and filters will be able to operate according to their rated are shut down for any length of time (overnight, weekends, specifications.

holidays), system pressure will drop significantly as air escapes The pressure holding valve is also able to isolate the treatment through leaks. When the compressors are turned on the air line in the event that an air treatment component malfunctions velocity will be high until operating pressure is reached. In this and alarms (See Priority: Air Quality on the next page).

This not condition, dryers and filters may not work to specification and only assures consistent air quality, but also safeguards the pipe contaminants may be carried over, causing scrap and higher distribution network and the air consumers in your production maintenance on equipment. Further, high air velocities may facility. The DHS will also keep the supply side of the system damage filter media and accelerate wear on desiccant, increasing pressurized, so when the system is started back up, the time to maintenance costs.

pressurize the distribution piping is reduced. Velocity Profile Compressed air Air velocity Without a pressure holding valve, contaminants such as water, oil, and supply particles can be swept into the system and the air treatment components will be “overrun” by very high air velocities during the initial pump-up of the system. Dryers and filters might be permanently damaged.

Without pressure holding valve TB19 ◄ DHS controlled velocity With pressure holding valve Time 2