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Summary of Contents for BERMAD 42T
- Page 1 Bermad Pressure-Reducing Pilot-Operated Pressure-Control Valve Model: 42T Installation Operation Maintenance Manual (IOM) 04.08.2019 REV 3B Page 1 of 12...
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Page 2: Safety First
3. Approvals The Bermad 42T pressure reducing valve 1.5, 2, 2.5, 3, 4, 6, 8, 10, 12, 14 and 16 inch sizes are UL Listed and FM Approved when installed with specific system components as described in this installation manual. Consult Bermad for any component approval recently to appear in any equipment directory. -
Page 3: Installation
Valve Seat Ring (code T): Corrosion Resistant Seat Ring Inserted to the main valve. Non Return Feature (code 20): Allows the valve to prevent return flow by adding check valves to the 42T pilot system, see fig. 2B for operation principle and item 7 and 3B item 5 for specific arrangement. -
Page 4: Operation
6.1.1 Gradually open the upstream indicating isolation valve. 6.1.2 Open a hydrant, relief valve, drain valve, or other flow-consumer downstream of the Bermad 42T Pressure-Reducing Valve, creating a system demand. 6.1.3 Gradually open downstream indicating isolation valve to fully open, allowing flow through the Bermad 42T Pressure-Reducing Valve. - Page 5 In any of the following inspections or testing procedures, if an abnormal condition exists, see Troubleshooting for possible cause and corrective action. The Bermad 42T Pressure-Reducing Valve is to be inspected, tested and maintained in accordance with the Standard for the Inspection, Testing and Maintenance of Water-Based Fire Protection Systems, NFPA 25.
- Page 6 Note: In cases where the filter screen frequently becomes blocked, it is recommended replacing the standard filter with Bermad Large Filter code “F” (see section 5.3). Difficulty in Performance Where difficulty in performance is experienced, the manufacturer or his authorized representative should be contacted if any field adjustment is to be made.
- Page 7 Figure 3A: Model 42T Pressure Reducing, General Arrangement (GA) Drawing Notes: (1) Refers to the length dimensions for Raised Face ANSI #150, ISO 16 Flanged, Threaded and Grooved valves (2) Refers to the length dimensions for Raised Face ANSI #300 and ISO 25 Flanged valves (3) Exact dimensions for the trim envelope may vary with specific component positioning (4) Pilot valve model #2PB/PBL for 1.5"-10", model #2HC for 12"-16"...
- Page 8 Non-Return Feature Figure 3B: Model 42T Pressure Reducing with GA Drawing Notes: (1) Refers to the length dimensions for Raised Face ANSI #150, ISO 16 Flanged, Threaded and Grooved valves (2) Refers to the length dimensions for Raised Face ANSI #300 and ISO 25 Flanged valves (3) Exact dimensions for the trim envelope may vary with specific component positioning (4) Pilot valve model #2PB/PBL for 1.5"-10", model #2HC for 12"-16"...
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Page 9: Appendix A: Fall-Off Charts
APPENDIX A: Fall-Off Charts Bermad 42T Pressure Reducing Valve Outlet Pressure Verses Flow, Should inlet pressure fall below to the valve outlet set pressure: Bermad 42T, Size 1.5, 2 and 2.5" Page 9 of 12... - Page 10 Page 10 of 12...
- Page 11 Bermad 42T, Size 12" Bermad 42T, Size 14" Bermad 42T, Size 16" Page 11 of 12...
- Page 12 Page 12 of 12...
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