Trunnion Ball Valve Pneumatic Actuated Single Acting Type

The gas-liquid linkage valve is powered by natural gas or independent gas supply, and the pressure oil is used as the transmission medium to drive the pipeline valve to open and close the actuator mechanism to ensure the safe operation of oil and gas pipelines.

The power source of the gas-liquid linkage valve is directly taken from the high-pressure natural gas in the main pipeline. After filtering, it enters directly the gas storage tank for storage through the high-pressure shuttle valve and single-phase valve (one way valve) without any decompression. Combined the integrated module unit, large flow, high pressure design technology, so that less control elements bear under high pressure, prolong the life of seals, reduce pipeline attachments part, reduce system leakage points, thereby improving the overall safety of the equipment.

Gas-liquid linkage is generally used in long-distance natural gas pipelines. Because the cost of compressed air or power supply in this place is very high, the pressure of natural gas in the pipeline is used as the power, and the compressed oil is used as the medium to open/close the valve. It has the advantage of no need electric power or air supply but it’s pipeline-self air source to realize the valve actuator operate in quick open/close or ESD.

The difference application choose of Gas-liquid linkage actuator and pneumatic actuator is the the gas pressure of the pipeline. The gas-liquid linkage is mostly used for high-pressure pipelines that require large torque and needs to take gas directly from the pipeline, and the pneumatic is mostly used for small-diameter pipelines with small torque or can provide instrument wind as power.

ARAN manufacture Trunnion Ball Valves are available in an extensive range of designs, materials, sizes and pressure classes and are in full conformance with international production standards ANSI, ASME B16.34, API 6D, ISO17292, GOST, specifications etc. The API 6D standard ball valve is most prevail in all industry standards, for the API standard is the highest valve standard in all kind of industrial application. Even some times the valves end connection will be changed in DIN/GOST/GB, the valve design will follow the API standard as the higher quality level.