DAV-M Air Release and Vacuum Break Valves Product Catalogue DAV - M DAV-M (Metal Air Valves) Edition /
DAV Series DAV-M General DAV-Metal Air Release and Vacuum Break Valves First Operation: Venting air from a filling pipeline The standard valve allows discharge of trapped air while the system is being filled with liquid. The valve will remain open, even at very high air velocity (A), until the liquid has reached the float and lifted it to its closed position (B). Available for valve models with suffix K and KA. Second Operation: Vacuum Breaking (Air Intake) of a draining pipeline 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, thus preventing negative pressure and possible collapse of the pipe (C). Available for valve models with suffix K and KA. Third Operation: Release of dissolved air from a pressurized pipeline Air that is being released from the liquid in the pressurized system or being introduced into the system from open sources and pumping vortexes, accumulates in the air release valves located at high places. The accumulated air forces the liquid out of the valve chamber, so the floating force of the bottom float decreases. The bottom float then drops, allowing for the trapped air to be vented through the small nozzle at the center of the top float. Then the liquid level rises, the bottom float is lifted and the nozzle closes (D). Available for valve models with suffix KA only. A C B D Edition /
DAV-M General DAV Series Outlet of reservoir, downstream of the isolation valve Discharge side of pumps, upstream of a non return valve Every mts. maximum Discharge side of vertical turbine pumps, upstream of a non return valve On uniform, long pipe sections: horizontal run, long descents, and long ascents Negative breaks: increase in a downward slope Adjacent to a pressure reducing device Both sides of check-valves, isolating valves or any device that may be closed Both sides of canal and bridge crossings Edition /
DAV Series DAV-M Technical Data Components DIM. QTY 9 7 M / NPT M 7 No x Ø / (M) Mx 9 9 Mx M : TIC CONTROL VALVES -MH KA RELIEF- BAR No. Description Material Optional Body D.I. Steel A- WCB, SST CFM, NI Aluminium Bronze, S.Duplex Washer SST SST, S.Duplex Plug BRS SST, S.Duplex Bottom Guiding Shaft SST SST, S.Duplex Nut SST SST, S.Duplex Plate D.I. Steel A- WCB, SST CFM, NI Aluminium Bronze, S.Duplex 7 Seal EPDM NBR, Viton Float Body PE-H.D. 9 Bolt SST SST, S.Duplex Disc SST SST, S.Duplex I.D. Plate AL SST O-Ring -9 NBR EPDM, Viton Top Guiding Shaft SST SST, S.Duplex SST SST, S.Duplex Float Cover PE-H.D. Seal EPDM NBR, Viton 7 Guiding Insert POM Washer SST SST, S.Duplex 9 Bolt SST SST, S.Duplex Cover Seal EPDM NBR, Viton Cover D.I. Steel A- WCB, SST CFM, NI Aluminium Bronze, S.Duplex Bolt SST SST, S.Duplex Nut SST SST, S.Duplex Edition /
DAV-MH Technical Data DAV Series DAV-MH High Capacity Combination and Kinetic Valves Dimensions & Weights Nom. diameter Height H Width W d-kinetic orifice area Approx. shipping Weight inch mm inch mm inch mm inch mm kg lbs.7 7. 9.. 9.. 7.7 9.. 9. 9. 7. 9... 7. 77.. 7 9..7. 9. 7 7. 77. 7 99 Connections: ISO, ANSI, BS, JIS flanges, BSP, NPT threads (mm valves only) H W Specifications Nominal sizes Pressure rating Minimal pressure for drip-tight sealing Temp. Range / mm to / mm PN ( psi), PN ( psi) and PN ( psi). bar Operating: - C / - F Storage: --7 C / - F Aero-Dynamic Performance 7 Discharge Data (free air ) ",, 9 " 7 Discharge Data (free air ),," 9 " Flow rate (M/h) Flow rate (M/h) - - - - In Data (free air ) ",, 9 - - - - - " - - - - In Data (free air ),," 9 - - - - - " - Flow rate (M/h) - Flow rate (M/h) Edition /
DAV Series DAV-MH Technical Data Small-orifice ('Automatic') discharge zzle eozzle.. zzle.............. " " " " (M/h) [m^/h] [m^/h] [m^/h] " " " " " Small Orifice Discharge PN - ",, DAV-MH Automatic Pipeline pressure Outlet (psi) - PN DAV-MH Automatic Outlet -- PN DAV-MH Automatic Outlet - PN - PN Pipeline pressure [bar] [m^/h] (M/h) [m^/h] [m^/h] [m^/h] (M/h) [m^/h] [m^/h] ", ", ", ", ", " Small Orifice Discharge PN - ",, DAV-MH Automatic Outlet - - PN 9 9 DAV-MH Automatic Outlet -- PN DAV-MH Automatic Outlet - PN - PN [bar] Pipeline pressure [bar] DAV-MH Automatic - Pipeline pressure Outlet [bar]- PN Small DAV-MH Orifice Automatic Discharge PN Outlet - ", -- PN,, DAV-MH Automatic Outlet - PN - PN 9 7 [bar] Pipeline pressure [bar] " " ",, ", ", ",, " " " " " " " " " " " (M/h) [m^/h] [m^/h] [m^/h] " " [m^/h] [m^/h] (M/h) [m^/h] [m^/h] [m^/h] [m^/h] [m^/h] (M/h) [m^/h] [m^/h] [m^/h] " Small Orifice Discharge PN -,, " DAV-MH Automatic Pipeline Outlet pressure - PN (psi) DAV-MH DAV-MH Automatic Automatic Outlet Outlet - PN - PN DAV-MH Automatic Outlet - - PN Pipeline pressure [bar] Small Orifice Discharge PN -,, " DAV-MH Automatic Outlet Outlet - PN - PN 9 9 DAV-MH DAV-MH Automatic Automatic Outlet Outlet - PN - PN DAV-MH Automatic Outlet - - PN Pipeline pressure [bar] Pipeline pressure [bar] DAV-MH Automatic Outlet - PN Outlet [bar] - PN DAV-MH DAV-MH Small Automatic Orifice Automatic Discharge Outlet Outlet - PN PN -, PN " DAV-MH Automatic Outlet - - PN 9 7 9 7 Pipeline pressure [bar] Pipeline pressure [bar] [bar] [bar] 9 7," " " " " " " " " " " " " " " Edition /
7 " 7.. ",.7 7 9 PN Small 7. " 9 7 7 7 " 7 9 PN Small 7. " PN Small 7 7 9 7 7..... 9.7. 9. 9.... - - Line pr DAV-MS Technical Data DAV Series DAV-MS Combination and Kinetic Valves Dimensions & Weights 9 " 7 9. 7. ",. 7... Nom. Height Width d-kinetic Approx. diameter H W orifice area shipping Weight inch mm inch mm inch mm inch mm kg lbs.9 77 9.. 9.. 7... 9. 9. 7 79 7.. 7. 77 9 9..7.. 77 7. 77. 7. 99 Connections: ISO, ANSI, BS, JIS flanges, BSP, NPT threads (mm valves only) 7 " " H W DAV-MH Automatic Outlet - PN DAV-MH Automatic Outlet - PN CFM m^/h Specifications 9. 7 Nominal sizes Pressure rating. Minimal pressure for drip-tight sealing Temp. Range.. / mm to / mm PN ( psi), PN ( psi) and PN ( psi). bar " Operating: - C / - F Storage: --7 C / - F " PSI bar Conversion tables Aero-Dynamic Performance DAV-MH Automatic Outlet - PN DAV-MH Automatic Outlet - PN., " ", " 9. DAV-MH Automatic Outlet - PN DAV-MH Automatic Outlet - PN Discharge Data (free air ),, Discharge Data (free air ), "," " " 9 9 7 7 Flow rate (M/h) Flow rate (M/h) - - - - In Data (free air ),, 9 - - - - - - - - - In Data (free air ), "," 9 - - - - - " " - Flow rate (M/h) - Flow rate (M/h) 7 Edition / In m^/h
DAV Series DAV-MS Technical Data Small-orifice ('Automatic') discharge zzle eozzle.. zzle.............. " " " " (M/h) [m^/h] [m^/h] [m^/h] " " " " " Small Orifice Discharge PN -,, DAV-MH Automatic Pipeline pressure Outlet (psi) - PN DAV-MH Automatic Outlet -- PN DAV-MH Automatic Outlet - PN - PN Pipeline pressure [bar] [m^/h] (M/h) [m^/h] [m^/h] [m^/h] Small Orifice Discharge PN -,, DAV-MH Automatic Outlet - - PN 9 9 DAV-MH Automatic Outlet -- PN DAV-MH Automatic Outlet - PN - PN [bar] Pipeline pressure [bar] (M/h) [m^/h] [m^/h] ", ", ", ", ", " DAV-MH Automatic - Pipeline pressure Outlet [bar]- PN Small DAV-MH Orifice Automatic Discharge PN Outlet -, -- PN,, DAV-MH Automatic Outlet - PN - PN 9 7 [bar] Pipeline pressure [bar],, ", ", ",, " " " " " " " " " " " (M/h) [m^/h] [m^/h] [m^/h] " " [m^/h] [m^/h] (M/h) [m^/h] [m^/h] [m^/h] [m^/h] [m^/h] (M/h) [m^/h] [m^/h] [m^/h] " Small Orifice Discharge PN -, ", " DAV-MH Automatic Pipeline Outlet pressure - PN (psi) DAV-MH DAV-MH Automatic Automatic Outlet Outlet - PN - PN DAV-MH Automatic Outlet - - PN Pipeline pressure [bar] Small Orifice Discharge PN -, ", " DAV-MH Automatic Outlet Outlet - PN - PN 9 9 DAV-MH DAV-MH Automatic Automatic Outlet Outlet - PN - PN DAV-MH Automatic Outlet - - PN Pipeline pressure [bar] Pipeline pressure [bar] DAV-MH Automatic Outlet - PN Outlet [bar] - PN DAV-MH DAV-MH Small Automatic Orifice Automatic Discharge Outlet Outlet PN - PN -- ", PN " DAV-MH Automatic Outlet - - PN 9 7 9 7 Pipeline pressure [bar] Pipeline pressure [bar] [bar] [bar] 9 7 "," " " " " " " " " " " " " " " " " Edition /
DAV-M-SA General DAV Series DAV-M-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 through other valves remains unrestricted. Simplicity Can be easily assembled on any of Dorot s DAV-M series air valves. Reliability Simple, durable mechanism, fabricated from high grade materials. Can be serviced without having to put the air valve out of service. Function 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 re-fills the pocket. Too-high velocity of the approaching water column may generate a pressure surge when it reaches the valve. Operation of the SA addition Air venting The Surge Arrestor addition of DAV-M valves limits the air out, 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. Adjustment of the air out can be done by plugging or un-plugging a set of bores in the SA adjustment plate (see pictures right side). 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 is in its low position, allowing unrestricted air into the system. 9 Edition /
DAV Series DAV-M-SA Technical Data Aero Dynamic Performance > Free air out DAV-MH / DAV-MS / KA-SA Discharge No. of open bores. DAV-MH / DAV-MS / KA-SA Discharge No. of open bores. Line Pressure (bar). Line Pressure (psi) Line Pressure (bar). Line Pressure (psi) Flow CFM m /h m /h CFM Flow DAV-MH / DAV-MS / KA-SA Discharge No. of open bores. DAV-MH / DAV-MS / KA-SA Discharge No. of open bores. Line Pressure (bar). Line Pressure (psi) Line Pressure (bar). Line Pressure (psi) Flow m /h CFM m /h CFM Flow DAV-MH / DAV-MS / KA-SA Discharge No. of open bores. DAV-MH / DAV-MS / KA-SA Discharge No. of open bores. Line Pressure (bar). Line Pressure (psi) Line Pressure (bar). Line Pressure (psi) Flow m /h CFM m /h CFM Flow Edition /
Ordering Guide DAV Series Ordering guide: Ordering data Ordering code Ordering data DAV Material Ductile Iron (standard) Other (SST, NAB ) Pressure rating M PN PN / psi C PN PN / psi Capacity PN PN / psi High (nominal orifice size) H Optional Addition Standard S SA Surge Arrestor External high-capacity air-release Function No - KA Combination Yes A K Kinetic Size / mm (available in H version only) / mm ISO,, AN, Connection Standard* ISO PN-,, ANSI, / mm BSP BSP** / mm NPT NPT** / mm " / mm " / mm (available in S version only) * Other flange-standards such as JIS, AS, ABNT etc are available upon demand ** BSP and NPT thread-connections are available for \mm only Example: DAV M H - AN KA SA PN Dorot Metal air-valve, size (mm), ANSI Combination Valve with Surge Arrestor, Pressure Rated bar (psi) Edition /
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