DAV MH Series
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Product Catalogue Air Releasing & Vacuum Breaking Valves

DAV-MH General 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 flow 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...

DAV-MH Technical Data Nominal sizes Pressure rating Minimal pressure for drip-tight sealing Max. Temperature No Description Body Washer Plug Bottom Guiding Shaft Nut Plate Seal Float Body Bolt Disc I.D. Plate O-Ring 2-009 Top Guiding Shaft Nozzle Float Cover Nozzle Seal Guiding Insert Washer Bolt Cover Seal Cover Bolt Nut PLUG Material SHAFT D.I. NUT 55SV23B0M3 PLATE SST 007V33B000 SEAL 445V03B002BRS BODY FLOAT 0028008012 PNH TPG SCREW SST 4421740D40 DISC 0021510471 SST RETAINING RING 0070902009 O-RING 2-009 D.I. 442263B0V0 AXE 442V930000 NR NOZZLE 44503B001 FLOAT COVER PE-H.D. 007V820000...

DAV-MH-SA General 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. Simplicity – Can be easily assembled on any of Dorot’s DAV-M series air valves. Reliability – Simple, durable mechanism, fabricated...

DAV-MH-SA Technical Data Aero Dynamic Performance > Free air outflow DAV-MH-2-KA-SA Discharge DAV-MH-4-KA-SA Discharge No. of open bores

DAV-MH-SA Assembly Assembly of Surge-Arresting device 4. Add housing and fasten nuts 6. Add the cover and fasten the M6 bolts

Ordering Guide Model MH Standard MHT Threaded (2” only) ISO PN16 ANSI 150 BSP NPT BSTD BSTE ISO PN25 ISO PN40 ANSI 300 JIS Standards Optional Addition SA Surge Arrestor Example: 4” (100mm) Valve, ANSI 300 Combination Valve with Surge Arrestor, Pressure Rated 40 bar (580psi) DAV

Expertise Expertise Reliability China Israel Hundreds of companies in the industrial, civil engineering, municipal and agricultural sectors around the world have chosen DOROT’s innovative and field-proven technologies. Since its establishment in 1946, DOROT leads the valves market with continued innovation, uncompromising excellence and firm commitment to its customers, consulting and supporting them through all stages of a project and overcoming challenges in R&D, design, implementation, and maintenance.