ISOLATION VALVES
The isolation valve series has been designed to offer an easy, fast and reliable solution for disconnecting piping transformer components. It is commonly used to allow Buchholz relay replacements without needing to drain the insulating liquid from the conservator.
This features metal-to-metal sealing with a special thin butterfly blade that enables a low oil-leakage rate in the closed position and has wafer-type round flange valves.
The body of the isolation valve is made of forged mild steel (no cast iron, so no porosity and no sweating), zinc-plated and with an epoxy paint finish suitable for standard indoor and outdoor applications. The shaft comes in carbon steel or stainless steel. The drive and gland are made of nickel-plated brass and have a padlocking function. An aluminium label indicates the open/closed position in 4 languages.
The isolation valve series features a special finish by request for extreme environmental conditions (i.e. very polluted areas, very cold/hot or very low temperature, corrosive/aggressive environments, etc.). It is also available with an AISI 316-L stainless steel body for offshore applications.
RADIATOR VALVES
The optimal solution for easy and safe transformer radiator isolation
The RADIATOR VALVE has been designed to offer an easy and reliable solution for disconnecting the transformer radiator, featuring a typical square DIN flange (3″/80 mm opening), on transformer tank walls and cooling banks.
The SW series features metal-to-metal sealing and has a special thin butterfly blade that allows for a low oil-leakage rate in the closed position. It is available with the “wafer” design (mounting between flanges) and “welding neck” design—flanges either with OR6400 seats or flat without seats.
The TW series features total sealing with an O-ring (zero leakage) and has a special throttle with an O-ring. It is available only with the “wafer” design and flanges with OR6400 seats.
Both the SW and TW 80 series bodies are made of forged mild steel (no cast iron, so no porosity and no sweating), zinc-plated and with an epoxy paint finish suitable for standard indoor and outdoor applications. The shaft comes in carbon steel or stainless steel. The drive and gland are made of nickel-plated brass and have a padlocking function.
The radiator valve series features a special finish by request for extreme environmental conditions (i.e. very polluted areas, very cold/hot or very low temperature, corrosive/aggressive environments, etc.). The TW80 series is also available with an AISI 316-L stainless steel body for offshore applications.
