DIN 42560 Form A and A OR butterfly valves for transformers are designed as flanges with welded flanges and are welded directly to the transformer vessel wall. The radiator is flanged in four holes (M16; circle with Ø160 mm bore). The flange is made of forged steel (S355J2G3).
A small leakage is possible with metal sealing butterfly valves for transformers, whereas soft seal butterfly valves are completely locked against vacuum.
Our transformer butterfly valves DIN 42560 A NW 80 meet the sealing and operating conditions according to DIN 42560 and EN 50216-8. Both versions are locked strictly outwards in the operation of the transformer.
Welded flange Butterfly valve of transformer
Seat dimensions for flange-sided O-ring gaskets according to customer requirements
Height h = 70 mm or h = 85 mm
4x 18 mm punching or M16 garland (PCD = 160mm)
Stainless steel housing with lid (h = 70) (1.4404)
Special welding impeller according to customer requirements
Special design up to -60°C
Setting the device in different versions:
Setting the device standard according to DIN 42560 (SW17 / SW36)
Lockable cover cap
Indicator, lockable (only for metallic sealing)
Indicator