31500 Butterfly valve with flanges of carbon steel PN 25 DN 200 - 1200

Operation
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

Tightness class ISO 5208, EN 12266-1, RATE B

Temperature
max +260 °C / min -40 °C (DN200 - 1000)
max +260 °C / min -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: PN 25, PN 16 and PN 10 ANSI CLASS 150

Nominal sizes
DN 200 - 1200

Product code
31500CS_ _ _ Z bare shaft
31500CS_ _ _ M manual gear

31500CS_ _ _ Z bare shaft
31500CS_ _ _ M manual gear

Conform with the requirements of the Council Directive 97/23/EC on Pressure Equipement, marking:
Class: Gas, group 1

31500_uk.pdf (125.9 kb)