The BERMAD Model FP 400E-5DC is suitable for flow control in firewater systems that include wet pilot lines with closed fusible plugs. Providing boosted local opening, it is recommended for systems with elevated fusible plug lines. It opens, preserving system designed flow, and closes in response to hydraulic pressure status in the wet pilot line
The BERMAD Model FP 400E-5DC is suitable for systems that include wet pilot lines with closed fusible plugs (thermal releases), and piping systems with a wide variety of open nozzles. Providing boosted local pressure release from its control chamber, Model FP 400E-5DC is recommended for systems with remote and/or elevated fusible plug lines. Combining a pressure control feature, it is also suitable for systems with high pressure supply source and/or relatively low flow.
In the SET position the line-pressure, supplied to both the main valve control chamber  and to a Hydraulic Relay Valve (HRV)  via the priming line , and through a Check Valve , an Accelerator  with priming restriction, and the wet-pilot line  Restriction , is trapped by the Check Valve, by the closed HRV, and by a closed Manual Emergency Release . The trapped pressure holds the main valve’s diaphragm and plug against the valve seat , sealing it drip-tight and keeping the system piping dry. The HRV is held closed by the line pressure in the wet pilot line. Under FIRE condition, a pilot line hydraulic pressure drop opens the HRV. Pressure is then released from the main valve’s control chamber to the downstream, through the open HRV and the Pressure Reducing (PR) Pilot valve . This allows the main valve to open, and water to flow into the system piping and to the alarm device. Should system pressure rise above PR pilot setting, the PR pilot throttles, thereby enabling pressure to accumulate in the valve control chamber. This causes the FP 400E-5DC to throttle closed, decreasing system pressure to PR pilot setting. The Manual Emergency Release , overrides the PR pilot, causing the valve to open fully.
1 - Main Valve, BERMAD FP 400E Series
2B - Accelerator with Priming Restriction
2R - Pressure Reducing Pilot
4B - Priming Strainer
7B - Check Valve
15B - Manual Emergency Release
18B - Priming Ball Valve
26B - Hydraulic Relay Valve (HRV)
S - Valve Position Limit Switch / Switches
The BERMAD Model FP 400E-5DC is UL-Listed.
The installation shall include Indicating and Drain Components