Does anyone know the approximate size of the ball valve, the ball valve model specification size com

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

It is impossible to ask this question. A small one can hold several in one hand, but a large one can't fit in a room.

The comparison table of ball valve models, specifications and dimensions is as follows:

V-type ball valve models: VQ40F, VQ640F, VQ940F, VQ641H, VQ941H, VQ70F, VQ670F, VQ970F, VQ71H, VQ671H, VQ971H.

Insulation ball valve model: BQ41F, BQ641F, BQ941F.

Stainless steel ball valve models: Q41F, Q641F, Q941F, Q41H, Q641H, Q941H.

Fluorine-lined ball valve models: Q41F46, Q641F46, Q941F46.

Cryogenic ball valve models: DQ41F, DQ41H, DQ41V.

Clamp type ball valve model: Q71F, Q671F, Q971F, Q71H, Q671H, Q971H.

High temperature ball valve models: Q41M, Q641M, Q941M, Q41PPL, Q641PPL, Q941PPL.

Fixed ball valve models: Q347F, Q647F, Q947F, Q347H, Q647H, Q947H, Q347W, Q647W, Q947W.

Turbine ball valve model: Q341F, Q341H, Q341W, Q341Y.

Welded ball valve models: Q61F, Q361F, Q61H, Q661F, Q661H, Q961F, Q961H.

Eccentric hemispherical valve models: Q340F, Q640F, Q940F, Q340H, Q640H, Q940H, Q340Y, Q640Y, Q940V.

Top-mounted ball valve models: SQ340F, SQ940F, SQ340H, SQ940H, SQ347H, SQ647H, SQ947H, DYQ340F, DYQ640F, DYQ940F.

Three-way ball valve model: Q44F, Q45F, Q44H, Q45H, Q644F, Q645F, Q644H, Q645H, Q944F, Q945F, Q944H, Q945H.

Four loss Kaihuitong ball valve model: Q46F, Q46H, Q646F, Q646H, Q946F, Q946H.

Precautions for the use of ball valves:

1. The handle is matched with the valve stem, and it is allowed to be loose within the tolerance range, and after the handle is tightened, it must meet the requirements of the switch direction.

2. The special-shaped mat and the valve stem distribution pin are allowed to loosen within the tolerance range.

3. The gland installation of the packing pressing plate shall not be tilted, and the force of the pressing bolt shall be uniform.

4. Packing Packing Gasket Packing Sleeve (Gland) and Packing Chamber Fit for Gap Fit (that is, Packing Gasket Packing Sleeve (Gland) is put into the packing chamber, and no obvious gap can be seen) Packing Sleeve (Gland) must be coaxial with the packing chamber.

5.The fit between the stem and the ball groove is allowed to loosen within the tolerance, and if it is too large, it is not allowed to be installed.

6. The bottom of the tank is coated with anti-rust paint, and the sealing ring and the groove shall not be loosened.

7. Apply lubricating oil on the surface of the ball.

8. The middle bolt is tightened diagonally and tightened diagonally, and the force should be evenly <>

Manual ball valves, including handle open and turbine open ball valves, are called manual ball valves.

Closing process: 1. When closing, rotate the handwheel clockwise, the valve stem begins to descend and makes the ball leave the valve seat and start rotating.

2. Continue to rotate the handwheel, and the valve stem is affected by the guide pin embedded in the spiral groove on it, so that the valve stem and the ball rotate 90° at the same time.

3. When it is about to close, the ball has been rotated 90° without contact with the valve seat.

4. In the last few turns of the handwheel, the angular plane at the bottom of the valve stem is mechanically wedged to compress the ball, so that it is tightly pressed on the valve seat to achieve complete sealing.

1. The specifications are 10 mm, 15 mm and 20 mm, and the models are as follows

Second, a brief introduction of the ball valve:

Ball valve (ball valve should be globe valve in the field of offshore and shipbuilding), standard GB T21465-2008 "Valve Terminology" is defined as: the opening and closing parts (ball) are driven by the valve stem, and around the axis of the ball valve for rotary motion of the valve. It can also be used for fluid regulation and control, among which the hard-sealed V-shaped ball valve has a strong shear force between its V-shaped ball core and the metal seat of the hardfacing cemented carbide, especially suitable for media containing fibers and tiny solid particles.

The multi-way ball valve can not only flexibly control the merging, diversion, and flow direction switching of the medium on the pipeline, but also close any channel and connect the other two channels. This type of valve should generally be installed horizontally in the pipeline. Ball valves are divided into the following according to the driving mode:

Pneumatic ball valves, electric ball valves, manual ball valves.

It depends on the material, seal, standard, and there is a valve model manual on the Internet.

There are many kinds. In the past, it was generally said that 4 points, 8 points, etc., but now the corresponding specifications are 10 mm, 15 mm, 20 mm, etc.

This depends on the specific ball valve, the ball valve code is Q