The use of gate valve can ensure that the fluid direction of the later valve is consistent, and the throttling effect cannot be achieved during use. It is mainly divided into exposed rod and concealed rod, which is different from ordinary gate valve. Next, Shanghai Lianggong valve manufacturer will introduce the differences between gate valve and fire gate valve and the characteristics of fire gate valve.

一、闸阀

1、 Gate valve

上海良工阀门厂家提到闸阀是由开闭部件组成的闸板，闸板运动方向与流动方向垂直。闸阀只能全开和全关。当闸板随阀杆作直线运动时，不适应闸板参数，提高其可制造性，并补偿加工时密封面的角度偏差，这种门叫做弹性闸门。

Shanghai Lianggong valve manufacturer mentioned that the gate valve is a ram composed of opening and closing parts, and the movement direction of the ram is perpendicular to the flow direction. The gate valve can only be fully opened and fully closed. When the gate moves in a straight line with the valve stem, it does not adapt to the gate parameters, improve its manufacturability, and compensate the angular deviation of the sealing surface during processing. This kind of gate is called elastic gate.

二、防火闸阀

2、 Fireproof gate valve

防火阀的启闭部分是门，门的运动方向与流体的方向垂直。闸阀只能全开和全关，不能调节或节流。闸板有两个密封面，常用的型号闸阀的两个密封面呈楔形。楔角随阀门参数变化。楔形闸阀闸板可以做成一个整体，称为刚性闸板;也可改制成能产生轻微变形的浇口，以提高其可制造性，补偿加工时密封面角度的偏差，这种门叫做弹性闸门。

The opening and closing part of the fire damper is the door, and the moving direction of the door is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The ram has two sealing surfaces, and the two sealing surfaces of commonly used gate valves are wedge-shaped. Wedge angle varies with valve parameters. Wedge gate valve can be made into a whole, which is called rigid gate; It can also be transformed into a gate that can produce slight deformation to improve its manufacturability and compensate for the deviation of sealing surface angle during processing. This kind of gate is called elastic gate.

按阀杆螺纹位置可分为明杆闸阀和暗杆闸阀

According to the thread position of the valve stem, it can be divided into rising stem gate valve and Non rising stem gate valve

1、重量轻：阀体采用黑色球墨铸铁，比传统闸阀轻20%-30%，安装维护方便。

1. Light weight: the valve body is made of black nodular cast iron, which is 20% - 30% lighter than the traditional gate valve and convenient for installation and maintenance.

2、平底闸阀阀座：传统闸阀用水冲洗后，石子、木头、水泥、铁屑、杂物等异物。它们将沉入阀座的凹槽中。因为不能关紧，容易造成漏水。

2. Flat bottom gate valve seat: after the traditional gate valve is washed with water, there are stones, wood, cement, iron filings, sundries and other foreign matters. They will sink into the groove of the seat. Because it cannot be closed tightly, it is easy to cause water leakage.

3、一般涂胶：门内外涂胶良好。橡胶硫化技术使硫化后的浇口能够保证准确的几何尺寸。橡胶和坚固的浇铸闸门连接牢固，不易脱落，弹性记忆性好。

3. General gluing: good gluing inside and outside the door. Rubber vulcanization technology enables the gate after vulcanization to ensure accurate geometric dimensions. The rubber is firmly connected with the solid casting gate, which is not easy to fall off and has good elastic memory.

4、铸造阀体：阀体采用铸造工艺，准确的几何尺寸保证了阀门的密封性能，无需任何表面处理。

4. Cast valve body: the valve body adopts the casting process, and the accurate geometric size ensures the sealing performance of the valve without any surface treatment.

以上就是上海良工阀门厂家就为大家介绍的闸阀与消防闸阀的差异及其消防闸阀的特点，在使用不同的阀门时都要对其进行提前的了解，同一款阀门在使用时因其微小的区别也存在一些差异。

The above is the difference between gate valve and fire gate valve and the characteristics of fire gate valve introduced by Shanghai Lianggong valve manufacturer. When using different valves, we should understand them in advance. There are also some differences in the use of the same valve due to its small differences.