Modulating Float Valves Model 1400-1

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Sierra Engineering & Manufacturing

Cairo, Egypt

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The model 1400 Modulating Float Valve is a hydraulically operated, diaphragm-actuated, control valve that allows flowing into the tank (reservoir) in order to maintain the level at the designated maximum. The valve modulates to maintain the tank level. As the reservoir level drops the main valve is open proportionally to increase the filling rate.

                                                            Product Range
                                                            DN50 – DN1000
                                                        
                                                            Pressure Rating
                                                            PN10, PN16 and 25
                                                        
                                                            Temperature Range
                                                            -20°C TO +70°C
                                                        
                                                            Flange Dimensions
                                                            EN1092-2 (DIN2501)
                                                        
                                                            Hydrostatic Testing
                                                            EN12266, ISO5208
                                                        
                                                            Type Testing
                                                            EN1074-5
                                                        
                                                            Actuation
                                                            Hydraulically actuated
                                                        
                                                            Certificates
                                                            Manufactured under a certified ISO 9001 quality system

Water pipelines and distribution networks
Irrigation pipelines and networks
Ground reservoirs and elevated tanks
Pumping Stations
Water hammer systems
Water treatment plant

The primary benefit of using a hydraulically actuated valve is the use of line pressure as motive power to operate. Whether used to control pressure, flow, or level, these valves operate without the need for external pressures and/or electricity.
The hydraulically operated, diaphragm-actuated, globe valves consist of three major components: body with SS316 seat, special reinforced diaphragm assembly, and cover with bearing installed. The only moving part is the diaphragm assembly guided top and bottom by a precision machined stem. The nylon fabric-reinforced synthetic rubber diaphragm provides superior sensitivity and control for all applications.
The hydraulically operated, diaphragm-actuated control valves are closed-loop systems. The main valve is controlled by a pilot that compares its spring setting (set-point) to the process variable (ie. pressure, flow, and/or level). As the process variable changes, the pilot senses the change and compensates to keep the process variable as close to the desired set point as possible. As such, these valves are single set-point control valves, and a set-point change will require operators to change the spring setting of the pilot.
The valve body is made of ductile iron, withstanding both high hydraulic and mechanical stress.
The valve is equipped with a 316 stainless steel seat, it maintains excellent durability against erosion and ensures a drop-tight sealing.