Handle Butterfly Valve and Worm Gear Butterfly Valve have their own advantages and disadvantages, which one is expensive?

Handle Butterfly Valve and Worm Gear Butterfly Valve have their own advantages and disadvantages, which one is expensive?

Handle-operated and worm gear-driven are two types of operation for manual butterfly valves. The two modes of operation overlap in usage, for example, in small diameters, both handle butterfly valve and worm gear butterfly valve can be used, but most of the time there are still certain differences in working conditions. In this article, OSI valve manufacturer will discuss with you the advantages and disadvantages of handle butterfly valve and worm gear butterfly valve.

Handle butterfly valve and worm gear butterfly valve are collectively known as manual butterfly valve. According to the connection form, there are clamp, flange, clamp, welding, and other forms of connection; according to the sealing form, they can be divided into soft seal and hard seal. Let's talk about the advantages and disadvantages of handle butterfly valve and worm gear butterfly valve.

The structure of the handle butterfly valve is simple and lightweight, making installation, dismantling, and maintenance very convenient. However, due to its limitations, the handle butterfly valve can only be used for small diameter pipelines. It is usually specified that the pipeline diameter should be less than DN200MM for handle operation. If the diameter exceeds this range, the torque will increase, making it more difficult to open and close the handle.

In addition, the handle butterfly valve is generally soft seal, the advantage of this type of valve is that there is a very high sealing performance, can reach zero leakage, good sealing. Handle butterfly valve is not suitable for hard seal, hard seal butterfly valve is generally used in high temperature and high pressure pipeline, with the handle is very difficult to open the valve.

Worm wheel butterfly valve can also be operated with a worm wheel drive in addition to the handle operation, but the cost will be slightly higher for sizes below 200mm.

Compared with the handle butterfly valve, the advantages of worm gear butterfly valve are also obvious. First of all, the worm wheel butterfly valve can be used on top of large caliber valves, as small as 50 caliber, as large as more than 1 meter caliber, can use worm wheel butterfly valve. In the absence of special requirements hard seal butterfly valve drive is usually to turbo drive.

Handle butterfly valve and worm gear butterfly valve which is expensive?

Worm wheel butterfly valve can do more caliber, so worm wheel butterfly valve is more expensive than handle butterfly valve. In addition, even in the same caliber, material, the same specifications, worm gear butterfly valve manufacturing cost is higher than the handle butterfly valve, the price is also more expensive than the handle butterfly valve.