3003 W CASINO RD BLDG 40-87 2025-08-21

August 10, 2006 Dry Systems 127a ® AIR PRESSURE MAINTENANCE DEVICE MODEL D-2 1. PRODUCT NAME Viking Model D-2 Air Pressure Maintenance _ Device Product Note:The Viking Model -i D-2 Air Pressure Maintenance Device, Part Number 02280C preassembled with bypass trim (Viking Available since 1973 _ Part Number 07459), provides the 2. MANUFACTURER = necessary isolation valves, union, and The Viking Corporation bypass trim valve. Refer to Figure 1. 210 N. Industrial Park Road Hastings, Michigan 49058 U.S.A. Telephone: (616) 945-9501r; (877) 384-5464 Fax: (616) 945-9599 e-mail: techsvcs@vikingcorp.com 3. PRODUCT DESCRIPTION The Viking Model D-2 Air Pressure Maintenance Device is a pressure regulator that automatically reduces the supply air pressure to a preset requirement when connected to a constantly maintained air supply. 4. TECHNICAL INFORMATION LISTINGS AND APPROVALS UL listed-VIOT C-UL Listed For Technical Data, Installation, FM Approved- Pressure Maintenance Devices Maintenance and Testing Instructions New York City Board of Standards and Appeals-Calendar No. 219-76-SA for individual system components, VdS Approved refer to current Viking Technical Data Specifications describing individual Components of Material Standards: Refer to Figure 2. the System used. Minimum Recommended Ambient Temperature: 40' F (4° C) Viking Technical Data may be found on Shipping weight: 3 pounds, 8 ounces(1,59 kg). The Viking Corporation's Web site at 5. FEATURES http://www.vikingcorp.com. The Web site may include a more recent A. Replaceable air filter. edition of this Technical Data Page. B.Air pressure setting is factory set at 40 psi (2.8 bar) [inlet pressure to 175 psi (12 bar)]. Outlet pressure setting range is 5 to 75 psi (.34 to 5.2 bar)±2 psi (.14 bar).Air pressure setting may be readjusted after installation. See paragraph 9-A, RESETTING. C. Ball check to prevent backflow. D. Restriction 1/16" (1,59 mm)to prevent rapid repressurization of a system. E. 1/4" (8 mm)tapped inlet and outlet. F.Available preassembled with bypass trim. Order Viking Part Number 07459 (includes Model D-2 Air Pressure Maintenance Device, Part Number 02280C). See Figure 1. 6. AVAILABILITY The Viking Preaction System is available through a network of domestic and international distributors. See the Viking Corp. Web site for closest distributor or contact The Viking Corporation. 7. GUARANTEES For details of warranty, refer to Viking's current list price schedule or contact Viking directly. 8. INSTALLATION The Viking Model D-2 Air Pressure Maintenance Device regulates and restricts air flow. 1. The air or nitrogen supply provided to the Viking Model D-2 Air Pressure Maintenance Device must be continuous, clean, dry, and oil free. 2. Install the Viking Model D-2 Air Pressure Maintenance Device in the air or nitrogen supply piping between two valves to allow isola- tion of the device for maintenance and adjustment.A union should be installed between the outlet of the Air Pressure Maintenance Device and the downstream isolation valve for servicing. 3. Bypass piping may be provided to allow initial pressurization of system piping more rapidly than the restricted airflow through the Air Pressure Maintenance Device will allow. Bypass trim must include a valve which must be closed for the Air Pressure Maintenance Device to function. See Product Note above. 4.The Air Pressure Maintenance Device must be located in an area where the minimum ambient temperature is 40' F(4°C)or higher, and not subject to mechanical damage. Form No. F_041989 Revised page replaces page 127a-b dated January 28, 1999. (Added pressure relief to paragraph 9-A, revised replacement parts)