Our firm reserves the right to make any technical changes without any notice to the client.

Over the years, Di Nicola has improved the design and manufacturing of Outlet cone fixed valves improving clients’ processes, avoiding cavitation phenomena, vibrations and reduce their operation and maintenance costs long lasting. Our products are developed to meet and surpass even the most difficult conditions. Di Nicola manufacture outlet bottom dam valves cone , Hollow jet and Howell Bunger type open drain, room dissipation, or discharge submerged under construction EN S275J0 steel and stainless steel with high nickel content with sizes between 200 and 2000 mm and nominal pressures from 2.5...

05 Valve Sleeve obturator The valve shall be designed as a free dising throughout its range without cavitation or vibration. The valve shall be metal/EPDM “O” ring seated achieving drip tight shut off. Di Nicola valve is the one and only Fixed cone Howell bunger valve with new “free spring sleeve design” avoiding any blocking due to breaking of adjusting springs located on the sleeve obturator in common competitors design. The sleeve obturator is cylindrical and uses a linear motion to open and close the valve. In A , B and C version the gate seat is in St.st 304 /316 machined in conical shape...

NOTE H= Total head * h + 12aV h= Static head one diameter upstream Q a =Inlet area sq.ft c= A√2gh F= Measured piez. head PRESSURE FACTOR, F COEFFICENT OF DISCHARGE, C valve opening HOWELL - BURGER VALVE STUDIES COEFFICIENT AND PRESSURE FACTOR CURVES PRESSURES AND CHARACTERISTICS DETERMINED FROM 6-INCH HYDRAULIC MODEL VALVE DISCHARGING INTO ATMOSPHERE Dis. free - Hood in place Dis. free - Hood in removed Our firm reserves the right to make any technical changes without any notice to the client

Lateral view Hard rain area Hard rain area Medium rain area Low rain area Embedded conveyor ring Head: 35 m H2O vertical inclination of HB valve : 0° Air resistance: not considered dissipation phenomena: not considered action of wind: not considered Our firm reserves the right to make any technical changes without any notice to the client.