Tank Blanketing system

One understands the combinations of valves under the Tank blanketing system, which are used especially for langer tanks and tank storage to protect against unacceptable pressure and vacumm situations and also inertiate if necessary. The structural protection against impermissible overpressure or vacuum in these cases usually implemented with weight-loaded valve systems, s.a. Overpressure and Vacuum protection.

These large tanks are designed for almost atmospheric pressure. For the specification of the valves, this means that only a very small pressure range is available for large volume flows, within which these valves work. The requirements of the valves for blanketing are particularly high because the pressure control via the control system is too slow and thus the reaction time of the entire system is too slow.The VALVE CONCEPTS® Vacu-Gard® 1078 and 1049 Secure-Gard® have been specially developed for this purpose. The Vacu-Gard® is a high-precision pilot-operated system, similar to a pressure reducer and requires no auxiliary power. This ensures that the main valve is either completely open or completely closed. The system operates independently of inlet pressure fluctuations and the flow rate with a repeat accuracy of 0.2 mbar and a hysteresis of max. 0.7 mbar. The maximum flow rate can be precisely determined with the Flowplug (defined reduction in cross-section). If the supply pressure fails, the Vacu-Gard® closes securely.

The Secure-Gard® is pilot-operated and achieves full opening even at a pressure rise of 10% above the set value and below the set value, the valve seat closes below set pressure.

The characteristics of both devices allow optimum utilization of the existing pressure range and thus the widest possible spread of the setting values.The consumption of inert gas is reduced, thus also the costs for the procurement of the inert gas and the thereby lower burden on the exhaust gas treatment plant / the environment.

Often, in the large tanks, all nozzles are used up, the space is not optimal, the tank cover would be weakened by further nozzles and a renewed acceptence would be required. This can be done with the VCI 2049 Manifold System, which is mounted on a nozzle on the tank. Blanketing Vacu-Gard® and vent Secure-Gard® are mounted directly to the VCI 2049.