性做久久久久久坡多野结衣-性做久久久久久久久浪潮-性欲影院-性影院-国产精品线路一线路二-国产精品兄妹在线观看麻豆

產品展廳收藏該商鋪

您好 登錄 注冊

當前位置:
東莞市廣聯自動化科技有限公司>技術文章>美國Posi-flate蝶閥工作原理?

技術文章

美國Posi-flate蝶閥工作原理?

閱讀:1102          發布時間:2016-8-15

Model 7000
Pneumatic Positioner

Accurate Valve Positioning

The Posi-flate Model 7000 Pneumatic Positioner provides accurate valve positioning with advanced features. A current-to-pressure transducer for 4-20 mA signal inputs proportionally positions the disc.

Applications

A high flow spool valve, plus an adjustable gain system, make the pneumatic positioner well suited for use with all pneumatic rotary actuator types including rack-and-pinion, heavy duty and others. The positioner housing is constructed of durable epoxy coated, die cast aluminum for protection against the toughest applications in all process industries.

Features

  • Non-interactive span adjustment
    Reduces calibration time.
     

  • Corrosion-resistant materials
    All exposed parts are constructed of heavy-duty anodized aluminum or stainless steel.
     

  • Captive cover screws
    Permits calibration without potential for losing screws.
     

  • Visual dome indicator
    Provides fully adjustable, high-contrast, full-angle viewing of valve position.

Principles of Operation

The Posi-flate Model 7000 positioner causes rotation of a valve actuator in proportion to an input signal. The spool shifts and a differential pressure is created across the actuator, causing rotation. Rotation is fed back through the positioner shaft and cam. Cam rotation causes rotation of both follower arm and feedback arm about their respective pivot pins. Rotation of feedback arm changes compression in the feedback spring which forces the balance beam and spool back to their neutral positions. This shuts off the flow of air to the actuator.

Zero adjustment is made by varying spring compression via a screw in the feedback arm. Span adjustment is made by moving the point of contact between the follower arm and feedback arm via a carriage assembly featuring rack-and-pinion adjustment. Since both arms are parallel at zero, span adjustment does not affect zero setting.

When used on a Posi-flate butterfly valve as shown, the positioner is enhanced with the addition of controls which automatically inflate and deflate the seat. Once the disc is in the fully closed position, the seat is automatically inflated. When the positioner is energized to open, the seat deflates and the disc opens.

Posi-flate Butterfly Valve
With Model 7000 Positioner

收藏該商鋪

登錄 后再收藏

提示

您的留言已提交成功!我們將在第一時間回復您~

對比框

產品對比 產品對比 聯系電話 二維碼 意見反饋 在線交流

掃一掃訪問手機商鋪
0769-89773074
在線留言
主站蜘蛛池模板: 图片| 太和县| 合阳县| 甘南县| 和田市| 郸城县| 张家口市| 遂溪县| 宁德市| 温宿县| 措美县| 资讯 | 山西省| 永年县| 新疆| 化州市| 台北市| 泽普县| 余江县| 永吉县| 邵东县| 南通市| 江津市| 洛隆县| 怀柔区| 通江县| 响水县| 鹿邑县| 安徽省| 德江县| 华阴市| 建水县| 炎陵县| 当阳市| 东宁县| 元朗区| 北碚区| 贵定县| 克拉玛依市| 桑植县| 维西|