美国pfs流量计，美国pfs流量计美国pfs公司目前主要产品（文丘里流量计、楔式流量计和高压节流装置）如下：（1） hvt-ci或hvt-fv halmi venturi 文丘里流量计，hvt-pi或hvt-fi halmi insertion type venturi插入式文丘里流量计，size：3” to 96”，presure rating：ansi class 150ibs to class 2500ibs， accuracy： bench calibrated试验台标定±0.5％，flow calibrated实际流量标定±0.25％。（2） hvt-fv-mini venturi for small line size application小流量用微小型文丘里流量计。size：1” or less, pressure rating: ansi class 150ibs to class 2500ibs, accuracy： bench calibrated试验台标定±0.5％，flow calibrated实际流量标定±0.25％。
（3）hvt-bv or hvt-bi halmi venturi type primary flow elements for bi-directional flow measurement. 双向文丘里流量计，size：3” to 96” pressure rating: ansi class 150ibs to class 2500ibs, accuracy： bench calibrated试验台标定±0.5％，flow calibrated实际流量标定±0.25％。
（4） pfs-wm wedge type primary flow measurement elements for high viscosity fluids application 用于高黏度流体流量测量的楔式流量计 size: 1” to 24”, pressure rating: ansi class 150ibs to class 2500ibs, accuracy： bench calibrated试验台标定±2％，flow calibrated实际流量标定±0.5％，repeat ability ±0.2％ （5） orifice plates, flanges, and holding blocks assembled for throttling, differential pressure flow measuring elements. 孔板流量计组件，size: 2” to 16”， pressure rating: ansi class 300# to class 2500# 。

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