The Instrumentation Valves is a very versatile product, covering all areas of machinery, electricity, nuclear power, petrochemical, oil and gas transportation, metallurgy, shipbuilding, transportation, medicine, military, large coal chemical industry and water supply system. The deviation of the measured value of the controlled object and the given value is determined and the analog output signal is generated according to the certain regulation law to push the actuator to eliminate the deviation, keep the controlled parameter near the given value or change according to the predetermined law.
Import Instrumentation Valves by the high and low pressure valve and balance valve group composed of one and differential pressure transmitter supporting the use. Its role is to differential pressure transmitter positive and negative measurement chamber and the pressure point of conduction or disconnected, or positive and negative pressure measurement chamber open and conduction pressure, the pressure point directly connected with the pipe connection using welding or Use other connections.
1, imported Instrumentation Valves standard material
(316SS) It improves the reliability and performance of the valve. The advanced packing structure ensures tight sealing, and the packing is located under the stem to isolate the thread and the media to ensure tightness of the seal and to achieve zero leakage. Exchange of the spool, for the use of a variety of conditions to provide a convenient standard configuration for the STLLITE alloy.
2, the import Instrumentation Valves work requirements
In addition to the MIL-STD-767 standard high temperature flexible graphite standard packing, the flange stop valve test proved to be resistant to 648 ° C (1200 ° F), used under low temperature ring valves, valves Cavity should be filled with tetrafluoroethylene, the working temperature is 0 ℃ - (- 420 ℃), high temperature flexible graphite filler operating temperature above 250 ℃, 50% of the liquid state.