Pressure Reducing Valves: Pressure reducing valves (PRV) shall be diaphragm operated, self-relieving, designed to provide precision control of air supply pressures, and shall be located after any filters or dryers. PRV shall be capable of being mounted in any position, shall have locking set point handle, and SS inlet strainer. PRV have metal or plastic body and shall be provided with 2-1/2” gauge of appropriate units. PRV’s that are not self-relieving shall be provided with a separate relief valve of appropriate range. Approved Manufacturers: Wilkerson Hankison Parker Van-Air Johnson Honeywell Siemens DDC/Auxiliary/Local Control Panel Air Filters: Provide an in-line air filter for main air supply to each DDC, auxiliary and local control panels capable of removing solids and petroleum-based oils. Filter efficiency shall be 99.9% of 0.5 micron particles. Filter element shall be visible and shall change color to indicate when to be replaced. Minimum capacity be 500 SCIM and 30 psig. Approved Manufacturers: Wilkerson Hankison Parker Van-Air Coalescing Air Filters: Provide a duplex set of coalescing air filters for the main air supply to all building temperature controls. Duplex assembly shall include upstream and downstream pressure gauges and isolation ball valves for each filter. Filter shall have a replaceable cartridge and drain port. Filter shall be designed to remove oil and water droplets down to 0.01 microns and particulates down to 0.08 microns. Minimum capacity shall be 10 SCFM and 150 psig. Coalescing filters shall be located downstream of refrigerated air dryers and upstream of chemical or desiccant dryers. Approved Manufacturers: Wilkerson Hankison Parker Van-Air Particulate Air Filters:
Pressure Reducing Valves: Pressure reducing valves (PRV) shall be diaphragm operated, self-relieving, designed to provide precision control of air supply pressures, and shall be located after any filters or dryers. PRV shall be capable of being mounted in any position, shall have locking set point handle, and SS inlet strainer. PRV have metal or plastic body and shall be provided with 2-1/2” gauge of appropriate units. PRV’s that are not self-relieving shall be provided with a separate relief valve of appropriate range. Approved Manufacturers: Wilkerson Hankison Parker Van-Air Johnson Honeywell Siemens DDC/Auxiliary/Local Control Panel Air Filters: Provide an in-line air filter for main air supply to each DDC, auxiliary and local control panels capable of removing solids and petroleum-based oils. Filter efficiency shall be 99.9% of 0.5 micron particles. Filter element shall be visible and shall change color to indicate when to be replaced. Minimum capacity be 500 SCIM and 30 psig. Approved Manufacturers: Wilkerson Hankison Parker Van-Air Coalescing Air Filters: Provide a duplex set of coalescing air filters for the main air supply to all building temperature controls. Duplex assembly shall include upstream and downstream pressure gauges and isolation ball valves for each filter. Filter shall have a replaceable cartridge and drain port. Filter shall be designed to remove oil and water droplets down to 0.01 microns and particulates down to 0.08 microns. Minimum capacity shall be 10 SCFM and 150 psig. Coalescing filters shall be located downstream of refrigerated air dryers and upstream of chemical or desiccant dryers. Approved Manufacturers: Wilkerson Hankison Parker Van-Air Particulate Air Filters: