Bell & Gossett FB38 Pressure Reducing Valve

B&G 110192 FB38 low pressure reducing valves are equipped with a low inlet pressure check valve and removable strainer.
Models with an “F” prefix feature fastfill. Models ending with “TU” feature a 1/2" sweat/NPT union.
The established operating principal of the B&G Reducing Valve is now offered with a brass body as standard material.
Highly resistant to corrosion, brass is recognized as the material of choice in water systems.
Another standard feature is a unique low inlet pressure check valve.
The check valve is designed to help prevent the loss of system pressure if the supply water pressure drops below the system pressure.
During normal operation the valve seat opens because of low system pressure and water flows in through the valve seat.
In order to enter the system, this water must first pass under the flexible sealing lips of the check valve. In case of low city
water pressure, the pressure on the inside of the check valve (the city water side) would be less than the pressure on the
outside (the system water side). This outside pressure then forces the lips of the check valve against the main diaphragm
preventing the flow of water out of the system. A simple, yet extremely effective device, the low inlet pressure
check valve is less affected by dirt than are ball and flapper type checks.