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Isolation valves, Available from reinhausen Singapore (RSG) or MR Singaporn

The optimal solution for the easy and safe isolation of transformer piping components


  • Wide size selection (opening from 25 mm up to 400 mm)
  • High-quality performance
  • Excellent surface finishing
  • Suitable for Buchholz relay and cooler isolation
  • Offshore version available


Butterfly valve type Wafer type
Flange shape Round
Round valve series DN and JUZ series
Nominal bore diameter from 25mm up to 350mm
Type of sealing Metal to metal
Standard execution Carbon steel forded body
Offshore execution Stainless steel AISI 316 body
Operating pressure: up tp 10 bar
Temperature range: from -60°C up to +140°C
Download PDF
Full catalogue pdf
Order form pdf



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 series 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 aluminum 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.



Isolation valve type Inlet diameter Number of holes on the flange Catalogue
DN series 25mm, 50mm and 80mm 4 or 8 holes pdf
JUZ series from 100mm up to 350mm from 8 up to 16 holes pdf
Mounting sketch pdf

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