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Improved vacuum actuated valve assembly and sealing mechanism for improved flow stability for fluids supplied at low atmospheric pressure from storage and delivery systems
Improved vacuum actuated valve assembly and sealing mechanism for improved flow stability for fluids supplied at low atmospheric pressure from storage and delivery systems
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机译:改进的真空致动阀组件和密封机构,提高了在低气压下从存储和输送系统供应的流体的流动稳定性
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摘要
A modified vacuum actuated valve assembly and sealing mechanism is provided for improved sub-atmospheric flow stability characterized by the absence of delivery pressure spikes and flow excursions. The valve assembly includes a non-stationary thermoplastic seat and a stabber. The stabber is characterized by a top portion having a circular periphery designed to mechanically engage and disengage with an inner sealing surface of the thermoplastic seat. The sealing surface is coined to eliminate surface irregularities contained therein, thereby producing a relatively smooth coined mating inner sealing surface for the circular top portion of the stabber. The valve assembly also includes a modified bellows capable of fine tuning the delivery pressure of the valve assembly.
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