L Max. service Max. service Materials pressure [bar] temperature [C] Body Valve cone 6 130 > 1 ) Brass (CW614N) PPO > 1 ) Max. service temperature at atmospheric pressure > SBO 11 SBO 21 SBO 31 Outlet: Screwed maleInlet: Union nut Outlet: Screwed femaleInlet: Union nut Type SBO 11 SBO 21 SBO 31Size DN 1" 1 > 1 / > 4 " 1" 1 > 1 / > 4 " > 3 / > 4 " 1" 1 > 1 / > 4 " L [mm] 66 82 57 70 39 40 45 Connections Inlet > 2 ) G1 > 1 / > 2 G2 G1 > 1 / > 2 G2 G1 > 1 (BSP thread) > 1 1 / > 4 G1 > 1 / > 2 G2 Outlet G1 G1 / > 4 G1 G1 / > 4 L 2 ) SBO 11 and SBO 21: Thread of union nut > Type DN Opening pressure [mbar] Direction of flow with- out with spring spring Outlet: Screwed maleInlet: Screwed female > Partial opening / instable range Full opening / stable range Partial opening / instable range Full opening / stable range > Volume flow VЋw Volume flow Vًw Pressure drop ٢Ȇp [bar] Pressure drop ∆p [bar] Curve 1: SBO 21 DN 1"Curve 2: SBO 11 DN 1"Curve 1: SBO 31 DN Curve 3: SBO 21 DN 1 > 1 / > 4 "Curve 4: SBO 11 DN 1 > 3 / > 4 "Curve 2: SBO 31 DN 1" > 1 / > 4 " > 1 / > 4 "Curve 3: SBO 31 DN 1 >

Type PN For liquids, especially suited for heating and hot-water RK 70 6 installations. Application as gravity circulation check and check valve. RK 71 16 For liquids, gases, vapours. Application as gravity > Θ D MB 14 16 circulation check, vacuum breaker, breather, foot valve, pressure-relief valve or pressure-maintaining valve > Type Nominal sizes DN EN reference ASTM equivalent > 1 )RK 70 Body 15 100 mm Brass (CW617N) Brass > L Valve disk Plastic PPE ֖ Body 125 200 mm Grey cast iron (EN-JL 1040) A126 Class A > RK 70(lower part) /RK 71 (upper part)DN 15 ֖ 100 mm RK 70DN 125 200 mm Plug Plastic...

Direction of flow without with spring spring Differential pressures at zero volume flow. The curves given in the chart are valid for water at 20ΰC. To read the pressure drop for other fluids the equivalent water volume flowrate must be calculated and used in the graph.The values indicated in the chart are applicable to spring-loaded valves with horizontal flow. With vertical flow insignificant deviations occur only within the range of partial opening.V > ׏ W = Vw V׷ > 1000 W = Equivalent water volume flow in [l/s] or [m > 3 /h] ρ = Density of fluid (operating condition) in [kg/m > 3 ]V = Volume...