Sewage Air Valve

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Sierra Engineering & Manufacturing

Cairo, Egypt

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SERIES 6600 is a single-chamber sewage air valve, designed to prevent dynamic closure under higher air velocity. Valves have double orifices and perform three functions. The three functions of the valve shall include:
(1) Valves exhaust large quantities of air during the filling of a piping system and close upon liquid entry.
(2) Valve open to admit air during draining pipeline draining or in negative pressure conditions.
(3) valve releases accumulated air from a piping system while the system is in operation and under pressure.

                                                            Diameter
                                                            DN50 – DN 200
                                                        
                                                            Pressure Rating
                                                            PN10 – 16
                                                        
                                                            Temperature Range
                                                            -20o to +70o
                                                        
                                                            Flange Dimensions
                                                            EN1092-2 (DIN2501)
                                                        
                                                            Hydrostatic Testing
                                                            Manufactured under a certified ISO 9001 quality system
                                                        
                                                            Type Testing
                                                            EN1074 – 4
                                                        
                                                            Certificate
                                                            Manufactured under a certified ISO 9001 quality system

Sewage main transmission lines
Wastewater treatment plants.

Main Product Features

Large lower body designed with strongly sloped funnel-shaped walls to avoid deposits of grease or other solid material.
Four ribs were obtained by casting to guide the stainless-steel float.
The upper body contains a casing that protects the air-release device against spurts during rapid filling.
Maintenance can be easily performed from the top without removing the air valve from the pipe.
Large AISI 316 stainless steel floats, placed on the lower body, and connected through a stainless-steel stem to the air release system.
The internal body guide and upper round wall keep float moving on its rail and keep liquid turbulence flowing within this area.

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