DAV - WP DAV - WP. Wastewater Air Valves. Product Catalogue. (Wastewater Air Valves) DAV - WP

Transcription

1 DAV - WP Wastewater Air Valves DAV - WP (Wastewater Air Valves) Product Catalogue DAV - WP

2 DAV Series??? DAV-WP General DAV-WP Wastewater Air Valves The DAV-WP valve has been designed for efficient discharge and intake of air from pressurized sewage systems where confined air (gases) could impair the system s operation. The valve s conical elongated body design minimizes the possibility of suspended solids or greases / oils clogging the orifice or causing the mechanism to foul up and stick. For ease of maintenance, the DAV-WP is equipped with a drain valve to allow periodic flushing of sediments, grease and solids. Operation Discharge of air at high flow velocity during the initial filling of the network. Introducing large quantities of air into the system when the pipe drains, maintaining atmospheric pressures in the pipeline and preventing collapse and cavitation damage to the conduits. Relieving entrapped air (gases) from the pipeline while the network is at normal working pressure. Principle of operation Automatic Air and Vacuum (Kinetic) Closed Dissolved gas is accumulated in the valve, released when the float drops Pipeline is aerated Pipeline is full of liquid

3 ] DAV-WP Technical Data??? DAV Series Dimensions & Weights Valve / 5 mm threaded / 5 mm flanged / 75 mm flanged / mm flanged / 5 mm flanged Dimension SI US SI US SI US SI US SI US H - Height 57 mm 5 7 / " 57 mm 5 7 / " 57 mm 5 7 / " 57 mm 5 7 / " 57 mm 5 7 / " W - Width 5 mm 9 5 / " 5 mm 9 5 / " 5 mm 9 5 / " 5 mm 9 5 / " 5 mm 9 5 / " D - Thread/flange mm / " mm 7 7 / " mm / " mm A - Aut. Nozzle Area.5 mm. in.5 mm. in.5 mm. in.5 mm. in.5 mm. in K - Kinetic Nozzle Area 55 mm. in 55 mm. in 55 mm. in 55 mm. in 55 mm. in E - Drainage Diameter (BSP/NPT) / " / " / " / " / " / " / " / " / " / " Weight.5 kg 7.5 lbs.. kg.9 lbs. 5 kg lbs. kg 9.7 lbs. kg.5 lbs. End Connections Available in BS/ISO/ANSI standards flange, Sizes: (5mm) - (5mm) The (5mm) valve is also available with a threaded BSP or NPT connection. Operating Pressure-Range. - bar ( - psi) 9 E 5 Components H No. Description Material Bonnet elbow PP Bonnet GRP Seals EPDM 7 Top Float Foam PP Discharge Data (free air flow) /", /", " Inflow Data (free air flow) /", /", " /" /" " /KA 5 Spring SS /" /" " Main Float Discharge Sub. Data Assy. (free air flow) /", /", " SS Inflow Data (free air flow) /", /", " /" /" " DAV-P-/-K/KA 7x -.59x Body ST-7* or SS.77 /".7 /" " Bolt SS y = 5E-5x +.7x -.59x Adapter flange PA ØD O Ring NBR /" 5 /" ^/h O Ring NBR /" /" /" /" ØW Outflow M^/h " * Three layer, UV protected epoxy coating " /". /" " /KA ". " -5 - DAV-P-/-K/KA 5 7 " x - +.7x Flow rate [m^/h] 5 7 Performance: -. Flow rate [m^/h] y =.x +.7x Flow rate [m^/h] Flow rate [m^/h]. -. Discharge data (free air flow) Inflow Data (free air flow) 5.75 Discharge Data (free air flow) " Discharge " Flow Data rate (free air (CFM) flow) " Flow Inflow Data rate (free air (CFM) flow) " ^/h.7.55 Inflow Data (free air flow) " " Outflow M^/h /KA DAV-P--k/KA x +.x y =.x +.x ^/h Outflow M^/h Flow rate [m^/h Flow rate [m^/h Flow (M/h) Flow rate [m^/h] Flow rate Flow (M/h) rate [m^/h] /KA DAV-P--k/KA Line pressure [meter] Line pressure [meter] Line pressure (meter) Line pressure [meter] Line pressure [meter] Line pressure (psi) Line pressure (psi) Line pressure [PSI] Line pressure [PSI] Line pressure [PSI] Line pressure [PSI] Line pressure (meter) E-5x -.5x y = E-5x -.5x ^/h Outflow M^/h Discharge data (Free Discharge air flow) data (Free air flow) Small Nozzle /", Small /", Nozzle ", " /", /", ", " /"-" ar]

4 DAV Series??? Surge arresting device for DAV valves DAV-WP-SA Surge arresting device for DAV valves Features: Surge Arresting - Automatically prevents water hammer pressure surges associated with air release valves operation. Optimum performance - Air outlet can be adjusted according to surge analysis results, on site to a required aero-dynamic performance. The SA addition is assembled on user selected valves only (at local high elevated points). The flow through other valves remains unrestricted. Reliability - Simple, durable mechanism, Can be serviced without having to put the air valve out of service. Operation: When air is admitted into the pipe, an in Air Pocket is created in the local high points where the Air / Vacuum valve is located. The returning flow re-fills the pocket. Too-high velocity of the approaching water column may generate a pressure surge when it reaches the valve. Air venting The Surge Arrestor addition of DAV-WP valves limits the air outflow, when the escaping air velocity exceeds a threshold value. This optional addition creates a temporary, slow closing Air Cushion that decelerates the water velocity, preventing water hammer effect. Vacuum Breaking (Air Intake) Decrease or the pressure in the system to negative value and the simultaneous drainage of the valve chamber, forces the floats down, allowing the admittance of air into the pipe. The SA disc moves back and allowing unrestricted air flow into the system. Principle of operation: Air venting Vacuum Breaking (Air Intake)

5 Surge arresting device for DAV valves??? DAV Series Dimensions: Valve DAV-P-SA Dimension SI US H - Height 7 mm / W - Width 9 mm / " W ØH Aerodynamic Performance Pipeline pressure (mwc) Flow chart - Free air outfllow m /h

6 DAV Series??? Ordering Guide Ordering guide: Ordering data Ordering code Ordering data DAV-WP Materials End connections Standard (ST-7 Steel body) - BS BSP SST body SST NP NPT Size I ISO " / 5 mm I ISO / mm A ANSI 5/5 " / mm BD BSTD/ASTD " / 5 mm J JIS- Function UN Un-drilled Thread Flanges Combination KA XX Specify Other For example: DAV-WP-SST--KA-I This code represents Waste Water air-valve, mm /, Combination function with stainless steel tank and ISO PN inlet flange-connection. Other Dorot air valves applications: 5

7 ??? DAV Series

8 GROW MORE WITH LESS DAV-WP WASTEWATER AIR VALVES JUNE 7