进口气动闸阀 德国洛克LOCKE气动闸阀

一、进口气动闸阀产品详情：

进口气动闸阀由于采用双层气缸结构，其与单气缸式气动闸阀相比，提升力增大了一倍。这就从根本上解决了单气缸气动闸阀的某些阀体内楔死而打不开的弊病。而且，由于气动闸阀具备缓冲机构，能有效地减速轻了关闭闸阀时，由于活塞下行冲击而造成的阀板车密封面和阀体密封面的磨损。通过变化执行器和阀体可演变成气动切断闸阀、气动高温高压闸阀等产品。

二、进口气动闸阀技术参数：

公称通径：DN50-DN1200

适用温度：-40℃～425℃接近开关

阀体材质：铸铁、铸钢、不锈钢电/气阀门定位器(调节型用)

公称压力：1.6Mpa-6.4Mpa

气源压力：0.4～0.6MPa

作用方式：气动(带手动)

产品形式：单作用、双作用

三、进口气动闸阀工作原理：

工作借助压缩空气驱动阀门做起闭运动，在管线上用于节流介质，作为开关阀使用，一般闸阀不适合用于调节型阀门使用。洛克牌气动闸阀闸阀是采用强制密封的 , 即阀门关闭时，要依靠外力强行将闸板压向阀座 , 以保证密封面的密封性。该气动闸阀流体阻力小、结构紧凑、适用于高温高压场合，广泛应用于石油、化工、电厂、钢厂等行业作为远程开关阀门使用。

四、进口气动闸阀性能特点

1、主要由阀体、阀盖、闸板、阀杆、密封圈、双层气缸及其活塞、活塞杆、隔板连同缓冲机构、手动机构、气动-手动转换装置和阀盖填料装置等部分组成；

2、上活塞行至行程上端可顶上上回讯器，使之发讯;下活塞行之行程下端可顶下下回讯器，使之发讯，以作为闸阀开闭信息在 操作室的模拟仪表盘上进行显示；

3、闸板是处于提升状态还是下降状态。闸阀关闭时，外伸指示杆位于 低位置;反之，闸阀全开时，外伸指示杆位于 高位置。此即为本阀启闭状态的现场指示；

4、气缸盖上部装有气动-手动转换装置。将转换手柄顺时针方向提转到“气动”定位孔定位，闸阀处于气动操作状态;反之，将转换手柄逆时针方向提转到“手动”定于孔处定位，闸阀即可进行手动操作。带锥齿轮的手柄转换方向相反。 手动操作闸阀时，手轮旋向和普通手动阀一样，即顺时针转为关，逆时针转为开。带锥齿轮转动的相反。

1、 Details of imported pneumatic gate valve products:

Due to the double cylinder structure, the lifting force of the imported pneumatic gate valve is doubled compared with that of the single cylinder pneumatic gate valve. This fundamentally solves the problem that some valve bodies of single cylinder pneumatic gate valves can not be opened due to wedging. Moreover, because the pneumatic gate valve has a buffer mechanism, it can effectively reduce the wear of the sealing surface of the valve plate car and the valve body caused by the downward impact of the piston when the gate valve is closed. By changing the actuator and valve body, it can be evolved into pneumatic cut-off gate valve, pneumatic high temperature and high pressure gate valve and other products.

2、 Technical parameters of imported pneumatic gate valve:

Nominal diameter: dn50-dn 1200

Applicable temperature: - 40 ℃ ~ 425 ℃ proximity switch

Valve body material: cast iron, cast steel, stainless steel electric / pneumatic valve positioner (for regulating type)

Nominal pressure: 1.6mpa-6.4mpa

Gas source pressure: 0.4 ～ 0.6MPa

Action mode: pneumatic (with manual)

Product form: single action, double action

3、 Working principle of inlet pneumatic gate valve:

With the help of compressed air to drive the valve to open and close, it is used as throttling medium on the pipeline and as on-off valve. Generally, gate valve is not suitable for regulating valve. Taichen brand pneumatic gate valve adopts forced sealing, that is, when the valve is closed, the ram should be forced to the valve seat by external force to ensure the tightness of the sealing surface. The pneumatic gate valve has small fluid resistance, compact structure, suitable for high temperature and high pressure occasions, and is widely used in petroleum, chemical industry, power plant, steel plant and other industries as a remote switch valve.

4、 Performance characteristics of imported pneumatic gate valve

1. It is mainly composed of valve body, valve cover, gate, valve stem, sealing ring, double-layer cylinder and its piston, piston rod, diaphragm, buffer mechanism, manual mechanism, pneumatic manual conversion device and valve cover packing device;

2. When the upper piston reaches the upper end of the stroke, it can push up the feedback device to send signals; The lower end of the travel of the lower piston can push the lower feedback device to send a signal, which can be used as the gate valve opening and closing information to be displayed on the analog instrument panel in the central operation room;

3. Whether the ram is in lifting state or falling state. When the gate valve is closed, the extension indicator rod is at the lowest position; On the contrary, when the gate valve is fully open, the extension indicator rod is in the highest position. This is the on-site indication of the opening and closing state of the valve;

4. The upper part of the cylinder head is equipped with a pneumatic manual conversion device. Turn the change-over handle clockwise to the "pneumatic" positioning hole for positioning, and the gate valve is in the pneumatic operation state; On the contrary, turn the change-over handle anticlockwise to the "manual" position, and the gate valve can be operated manually. The handle with bevel gear changes in the opposite direction. When the gate valve is operated manually, the hand wheel turns to the same direction as the ordinary manual valve, that is, turning clockwise to close and counterclockwise to open. The opposite of the bevel gear rotation.