Duyar Supervised Butterfly Valve, Wafer
Indicating Butterfly Valve – Wafer
Y-4020
300 PSI Max. Working Pressure - Wafer Connection
General Specifications
Size: 2” – 8” /DN65 - DN200
Nominal Pressure: 300 psi (20.6 bar)
Working Temperature: -10˚C/+120˚C
Standards
Tests: FM 1112, UL 1091
They are defined as zone control valves. They are used as shut-off valves on water supply lines
to separate (control) zones within a premises. Butterfly valves or rising stem valves are used for shut-off or control. The position of all valves used in fire systems
must be visible and electrically monitored. The butterfly valves are of the gearbox type with handwheel. The supervisory switch of the butterfly valves is inside the valve, and
the valve has an open/closed position indicator.
They are defined as local control valves. Generally they are used in water feed lines as interruption valves in order to separate (to control) zones in
the location. Butterfly valves or rising stem valves are used in order to shut off or to control the flow. The position of all valves in fire systems should
be visible and electrically monitored. This butterfly valve type has a gearbox with handwheel. The supervisory switch is located inside the butterfly
valve and includes also an on/off indicator.