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- 产品信息
- 名称: 球阀BALL VALVE
- 品牌：VIRGO
- 货号：B481
- 颜色： 图片色
- 产品特点
限位开关又称行程开关，可以安装在相对静止的物体（如固定架、门框等，简称静物）上或者运动的物体（如行车、门等，简称动物）上。当动物接近静物时，开关的连杆驱动开关的接点引起闭合的接点分断或者断开的接点闭合。由开关接点开、合状态的改变去控制电路和电机。
限位开关就是用以限定机械设备的运动极限位置的电气开关。限位开关有接触式的和非接触式的。接触式的比较直观，机械设备的运动部件上，安装上行程开关，与其相对运动的固定点上安装极限位置的挡块，或者是相反安装位置。当行程开关的机械触头碰上挡块时，切断了（或改变了）控制电路，机械就停止运行或改变运行。由于机械的惯性运动，这种行程开关有一定的“超行程”以保护开关不受损坏。非接触式的形式很多，常见的有干簧管、光电式、感应式等，这几种形式在电梯中都能够见到。当然还有更多的先进形式。限位开关是一种常用的小电流主令电器。利用生产机械运动部件的碰撞使其触头动作来实现接通或分断控制电路，达到一定的控制目的。通常，这类开关被用来限制机械运动的位置或行程，使运动机械按一定位置或行程自动停止、反向运动、变速运动或自动往返运动等。在电气控制系统中，限位开关的作用是实现顺序控制、定位控制和位置状态的检测。用于控制机械设备的行程及限位保护。构造：由操作头、触点系统和外壳组成。在实际生产中，将限位开关安装在预先安排的位置，当装于生产机械运动部件上的模块撞击行程开关时，限位开关的触点动作，实现电路的切换。因此，行程开关是一种根据运动部件的行程位置而切换电路的电器，它的作用原理与按钮类似。限位开关广泛用于各类机床和起重机械，用以控制其行程、进行终端限位保护。在电梯的控制电路中，还利用行程开关来控制开关轿门的速度、自动开关门的限位，轿厢的上、下限位保护。
The GO™ Switch is the all in one proximity sensor and limit switch. GO Switches are rated for use in Nuclear Power Plants, Explosion Proof, High Temperature, Submersible, High Pressure and General Purpose locations. GO™ Switch product solutions enable process management and control more intelligently and efficiently under the most demanding conditions while providing higher reliability, cost savings and less down time.
Hazardous Area Certified
GO Switches are suitable for use in Flameproof/Explosion Proof, Non-Incendive, Intrinsically Safe hazardous areas with IECEx, ATEX, GOST, InMetro, UL, CSA, JIS, KOSHA, and NEPSI.
General Purpose
Quality engineered products that meet ordinary location requirements. Suitable for use in multiple industries, such as automotive, marine, military vehicles, manufacturing, amusement parks, material handling, gaming and entertainment, and heavy equipment. Setting the standard for reliable performance.
Nuclear Qualified
Qualified and tested to meet AP1000, IEEE RCC-E Candu KHNP, TBE/KBE and other Global Nuclear requirements. Designed for long-life dependability in containment LOCA, containment non-LOCA (Harsh Duty), and Mild duty applications.
Extreme (High and Low) Temperature
Rated for continuous operation in high temperatures up to 204°C (400°F). Especially useful in steam turbines as well as high heat boilers, dryers, steel processing, and aluminum die-casting. Extreme low temperatures as low as -60°C (-76°F).
Submersible
Available with subsea connectors for continuous submersion. GO™ Switch submersible sensors are submersible up to depths of 7,010m/23,000ft and offer trouble-free position sensing in applications such as offshore oil platforms, lock and dam gates, ships and vessels, pin placement detection, wastewater rendering areas, bilge level, high pressure washdown, draw bridges and subsea valve position monitoring.
High Pressure
High pressure options up to 960 bar (10,000 psi). Typical application for hydraulic and pneumatic cylinders.
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