Duyar Supervised Butterfly Valve DN250–DN300

Indicating Butterfly Valve – Wafer

Y-4021

300 PSI Max. Working Pressure - Wafer Connection

General Specifications

Size: 10” – 12” /DN250 - DN300

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.