Data sheet ERHARD butterfly valves

ERHARD butterfly valves – the overview This table contains the most important specifications for the standard products in the ERHARD butterfly valve range (DIN EN 593). Numerous other options are available on request. ERHARD butterfly valves by nominal sizes and pressure ratings DN PN 10 PN 16 PN 25 PN 40 ERHARD ROCO Premium ERHARD EAK butterfly valves Nominal size DN Pressure rating PN Face-to-face dimensions DIN EN 558 Basic line 14 Flange DIN EN 1092-1 Type 21 DG Falnge DIN EN 1092-2 Type 21 DG Body and valve disc material Spheroidal graphite cast iron EN-JS 1030 Spheroidal graphite cast iron...

ERHARD ROCO Premium butterfly valve The butterfly valve with the innovative details The ERHARD ROCO Premium butterfly valve as a logical and consistent development of the ERHARD butterfly valves that have been tried and tested for many years stands for highest quality in the nominal sizes DN 80 to 600. Perfect solutions ensure outstanding product properties with respect to operating safety, durability and cost effectiveness: • Polygon shaft-hub connection [1] between shaft and valve disc with shut valve eye and 20 % more torque reserves. • Safe sealing using a rolled up, solid seat ring made...

ERHARD ROCO Premium butterfly valve – the overview Brief specifications Operating instructions Butterfly valve according to DIN EN 593 materials and finishes • Body: pheroidal graphite cast iron EN-JS 1030 s • Body seat: RHARD EKB design: austenitic Cr-Ni steel E • Valve disc: oft-sealed, with double eccentricity support, made of spheroidal s graphite cast iron EN-JS 1030, • Valve shaft: erritic Cr steel f • Shaft bearing: bearing bronze in accordance with DIN 50930 TG and Drinking Water Regulations, maintenance-free • Shaft seal: lastomer e • Profiled sealing ring: rubberised (EPDM or NBR rubberised),...

ERHARD ROCO Premium butterfly valve – the dimensions table DN handwheel revolutions (Open/Close) RZ with round trunnion HR with handwheel EA with electric rotary actuator (dimensions can vary depending on the actuator manufacturer) ERHARD butterfly valves

ERHARD ROCO Premium butterfly valve dismantling type – the overview Brief specifications Butterfly valve according to DIN EN 593 materials and finishes • Body: pheroidal graphite cast iron EN-JS 1030 / vitreous enamel s • Body seat: RHARD vitreous enamelling E • Valve disc: ouble eccentricity support, made of spheroidal graphite cast iron d EN-JS 1030, EN-JS 1030 enamelled on request • Valve shaft: erritic Cr steel f • Bushing for shaft: St / Sn / PTFE, maintenance-free, in stainless steel / PTFE or bronze / PTFE on request • Shaft seal: lastomer e • Profiled sealing ring: St 37 / elastomer,...

ERHARD ROCO Premium butterfly valve dismantling type – the dimensions table DN handwheel revolutions (Open/Close) RZ with round trunnion HR with handwheel EA with electric rotary actuator (dimensions can vary depending on the actuator manufacturer) face-to-face dimension dismantling type butterfly valve Mobility of the loose flange -1 mm to +5 mm A face-to-face dimension flange

The tried and tested butterfly valve for large nominal sizes and pressure ratings The used for many years ERHARD butterfly valves cover with nominal sizes between DN 700 and 3600 [1] and pressure ratings from PN 10 to PN 40 a wide range of applications. Proven details ensure reliable quality and a high degree of cost-effectiveness: • Drive shaft and bearing pin are supported in maintenance-free, self-lubricating plain bearings and hence are highly resilient [2] • Connection between drive shaft and valve disc with proved and robust key connection for force transmission without play even under...

ERHARD EAK butterfly valve – the overview Brief specifications Operating instructions Butterfly valve according to DIN EN 593 materials and finishes • Body: pheroidal graphite cast iron EN-JS 1030 s • Body seat: ustenitic Cr-Ni steel a • Valve disc: oft-sealed, with double eccentricity support, made of spheroidal s graphite cast iron EN-JS 1030 • Valve shaft: erritic Cr steel f • Shaft bearing: P1 (PTFE) according to DIN 1494-4, maintenance-free • Shaft seal: lastomer e • Profiled sealing real: elastomer, confined with clamping ring, EPDM or NBR, optionally Viton • Screws: nternal and external...

ERHARD EAK butterfly valve – the dimensions table DN Other nominal sizes, pressure ratings and actuator options on request.

ERHARD EAK butterfly valve – the dimensions table e1 Dimensions used RZ with round trunnion EA with electric rotary actuator (dimensions can vary depending on the G1 [kg] weight with bypass u actuator manufacturer) handwheel revolutions (Open/Closed) ERHARD butterfly valves

ERHARD butterfly valves – perfect engineering to the last detail Headloss coefficients DN 80 100 125 150 200 250 300 350 400 450 Headloss coefficients ζ with fully opened butterfly valve. The results were obtained in ERHARD’s test centre following extensive test series and correspond to the actual performance of the fitting. Calculation of the pressure loss:  p = ζ · ρ/2 · v2  p Pressure loss [Pa]-105 Pa ^ 1 bar = Headloss coefficient of the valve ERHARD butterf

ERHARD butterfly valves – installation suggestion for ERHARD check valve check valve butterfly valve ERHARD butterfly valves

ERHARD butterfly valves – Assignment electric actuator AUMA Nominal size DN Revolutions Open/ Close Adjusting moment Close MDR=Nm Adjusting moment Open MDL=Nm ERHARD butterfly valves

Gear assembly With handwheel direct side D-Absperrklappen sind inDie ERHARD-Absperrklappen sind in beide Richtungen dicht. beide Richtungen ERHARD-Absperrklappen Die ERHARD-Absperrklappen sind indicht. Richtungen dicht. sind in beide Richtungen dicht. Die beide er DruckbeaufschlagungBei ERHARD-Absperrklappen sindvonbeide sindAin beide Richtungen dicht.Seite A anstehen (bevorzugte Druckrichtung). soll der DruckDruckbeaufschlagung soll Seite anstehen DruckAvon Absperrklappen sind in beideeinseitigerDie ERHARD-AbsperrklappenRichtungen dicht. Die ERHARD-Absperrklappen sindeinseitiger A anstehen (bevorzugte...