Butterfly valves for transformers DIN 42560 Form B & B OR
Our type B and B OR transformers are designed as intermediate flange and mounted between two corresponding mating flanges. The flange is made of forged steel S355J2G3 and has a flange thickness of h = 40 mm with remote housing.

Our type B and B OR NW 80 transformers meet the sealing and operating conditions to DIN 42560 and EN 50216-8. A small leakage is possible with metal sealing butterfly valves for transformers, whereas soft seal butterfly valves are completely locked against vacuum. In both versions the operation of the transformer is absolutely locked outwards.

Intermediate flange Butterfly valve of transformer
Slot dimensions for flange-sided O-ring gaskets according to customer requirements
-18 mm punching or M16 garland
-Stainless steel body with cover (1.4404)
-Special welding impeller according to customer requirements
Special design up to -60°C
Coating up to -C5-M: SOLIDLINE in all common RAL colors
-Setting the device in different versions:
-Setting the device standard according to DIN 42560 (SW17 / SW36)
-Lockable cover cap; optional: OFFSHORE version in glass fiber reinforced plastic
-Indicator, lockable
-Indicator
Detail drawings Butterfly valve form B and B OR

Metallic Sealing (Form A) Soft Sealing (Form A OR)

Butterfly valves for OFFSHORE applications
The intermediate flanged butterfly valves of our transformers can be equipped as follows:

Solid SOLID coating up to -C5-M (ISO 12944); consists of a KTL primer, an Akzo Nobel powder intermediate coating and a top coating
-Material housing can be made of stainless steel 1.4404 (316L) on request
-Lockable cover GFK (glass fiber reinforced plastic)
Adjusting device standard made of seawater-resistant aluminum (EN AW 6082)
-Bolts with wreaths are stainless steel 1.4404 (316L) or duplex steel (1.4462)