European tender based on a negotiated procedure with advance selection for the supply of High Pressure Shut Down (HPSD) Cabinets for the benefit of N.V. Nederlandse Gasunie

At Gasunie metering and regulating stations around the country - low caloric natural gas is reduced from up to 66.2 bar to 40 bar or lower for further transport to Gas receiving stations. Various emitting (pneumatic) components are used for pressure control. The metering and control stations date from the 1960’s and 1970’s - with one of the crucial components (also dating from that time period) being a so-called continuous gas-emitting HPSD Control Cabinet (hereafter: HCC). Currently - within Gasunie - the HCC is controlled by a Bristol 624II pneumatic PI controller. which is a controller operating on the vane nozzle principle. A vane nozzle controller always seeks a balance between the vane and the nozzle and emits continuously - when in control. Because of...