Previous owner and Managing Director of Oliver Valves Netherlands, Louis van Elowijk, was presented with a special gift sent from Chairman and long-time friend Michael Oliver. Over 40 years ago Louis was the inventor of the modern day instrument isolate and calibrate valve now used world-wide by everyone who makes and uses instrumentation valves and manifolds. Known at Oliver’s as a “G12”, it is a combination of an isolate valve and a vent valve with a vent port in a single body manifold. In December 2019, Louis was gifted, at his home in the Netherlands, with a Gold plated, working valve which Oliver’s now call the G12 FFG (G for Gold). The gift was presented to celebrate the selling of the 4 millionth G12 valve at Oliver’s. The previous owner, now retired, was elated with his gift and thanked Michael and all involved.
The G12 allows the operator to shut off the pressure from the pipeline and using a second valve in the block, vent either to atmosphere or through piping, to a safe place. The gauge can then be safely removed as it has been depressurised and any toxic medium has been safely piped away. To measure pressure in a pipeline an option is to simply screw a pressure gauge into the pipe. However, the problem arises when removing the pressure gauge because it is damaged or needs to be re-calibrated, which is a major requirement of the industry. In order to do this, in the simplest form, an isolation valve is fitted. The operator can then shut off the valve by shutting off the pressure and removing the pressure gauge, repair it and auto-calibrate it. The challenge of this being done at high pressure is at the point of shutting off the needle valve. The high pressure is on both sides of the needle valve and as the pressure gauge is removed, there will be a terrific release of high pressure fluid or gas which could be dangerous to the operator. Louis, as a result, invented the G12 product to overcome this problem, and in process has managed to help instrumentation valve users worldwide for many years to come.
For more information regarding Louis’ famous G12, please visit our the G12FF product page for more information.