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31500 series 31500 Butterfly valve with flanges of carbon steel PN 25 DN 200 - 1200 The welded butterfly valve 31500 with flanges is used for example in district heating and in industry. It can be used as an on-off or control valve. Högfors butterfly valve is tight in both flow directions. Nominal pressure 25 bar Closing pressure max 16 bar or 25 bar (option) Tightness class ISO 5208, EN 12266-1, RATE B Temperature max/min +260°C/-40°C (DN200 - 1000) max/min +260°C/-20°C (DN1200)

The max pressure difference depends on the working temperature. Design The body of the butterfly valve with flanges is carbon steel. The double eccentric disc and shafts are made of stainless steel. Replaceable seat ring is also stainless steel. The shaft packing box is a combination of graphite rings and O-rings which are possible to tighten and are also replaceable. The butterfly valve is delivered with a bare shaft or with an actuator. You can choose either bare shaft, manual gear, electrical, pneumatic or hydraulic actuator. Face-to-face lenght EN 558-1 series 14 Connection between flanges EN1092-1 Type B, PN 25, PN 16 and PN 10 ANSI CLASS 150 Nominal sizes DN 200 - 1200 Conform with the requirements of the Counsil Directive 97/23/EC on Pressure Equipement, marking: CE 0575 Class: Gas, group 1  More detailed information see Product card