Concentric Butterfly Valves

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Sierra Engineering & Manufacturing

Cairo, Egypt

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SIERRA model 7200 is a concentric rubber lined valve, double flanged or wafer type that shall be suitable for installation between flanges. Face to face according to EN 558 table 5 basic series 20 valves are drilled in accordance with EN 1092-2. The disc has a profiled sealing edge which requires minimal deformation of the liner to achieve a tight sealing. This gives less wear to the liner and low operating torques. The 7200-butterfly valve is an excellent valve for isolation purposes and it might also be used for throttling purposes under certain conditions.

                                                            Product Range
                                                            DN50 – DN800
                                                        
                                                            Pressure Rating
                                                            PN10, PN16
                                                        
                                                            Temperature Range
                                                            -20°C TO +70°C
                                                        
                                                            Flange Dimensions
                                                            EN1092-2 (DIN2501)
                                                        
                                                            Hydrostatic Testing
                                                            EN12266, ISO5208
                                                        
                                                            Type Testing
                                                            EN1074-1,2
                                                        
                                                            Certificates
                                                            Manufactured under a certified ISO 9001 quality system
                                                        
                                                            Actuation
                                                            Manual with GB, pneumatic or electrically actuated

Municipal water and irrigation pipeline mains and distribution networks
Pumping stations and intakes
Ground reservoirs and elevated tanks
Water treatment plants
Primary and secondary cooling for power stations

Main Product Features

The Symmetric And Slim Design Of The Disc Ensures Favorable Flow, Low-Pressure Loss, And Energy Cost Saving
Smooth machining of disc edge also provides less deformation on the rubber sealing thus longer life of the valve
Absolutely tight sealing with the flow in either direction
The valve body and disc are accurately machined which results in low operating torque and long service life and reliability
Shaft bearings design prevents shaft deflection and guarantees optimum guidance even after many years of operating service
Can be supplied in flanged or wafer design
The valve can be installed in any desired position
Disc shall be made of ductile cast iron, stainless steel, Duplex, Aluminum bronze