What is the ball diameter of ball valve DN75 and what is the size of ball valve sixth?

Ball valves and gate valves are generally used for the opening and closing of fluids, and are generally not used for flow regulation, while globe valves can be used for flow adjustment in addition to the opening and closing of fluids. If you need to adjust the flow rate, it is easy to use the medium valve behind the meter. The ball valve is very convenient, fast and labor-saving, generally only need to turn the valve handle 90 degrees, and the ball valve can be used on less pure (containing solid particles) fluids because its spherical spool does shear motion on the fluid when opening and closing.

And the gate valve sealing surface is easy to cause erosion and abrasion, maintenance is more difficult, the overall size is larger, a certain space is required for opening, the opening and closing time is long, and the structure is more complex. If you want to know the difference between valves, you can consult: Shanghai Lubei Fluid Equipment****.

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.

In the ball valve series, I really haven't seen the DN75 caliber either. If there is a ball, the outer circle should be up and down.

The size of the pipe is generally calculated according to the inch, one inch is equal to eight centimeters, and the four-point ball valve is four centimeters, and the nominal diameter.

for DN15. The six-point ball valve is six centimeters, that is, the nominal diameter is DN20, and the one-inch ball valve is the nominal diameter DN25. It is best to use threads to indicate the size of the diameter of the small-diameter threaded ball valve. 1/8,1/4,3/8,1/2,3/4。

The pipe size is generally calculated in inches, one inch is equal to eight centimeters, and the four-inch ball valve is four centimeters, and the nominal diameter is DN15. The six-point ball valve is six centimeters, that is, the nominal diameter is DN20, and the one-inch ball valve is the nominal nominal diameter DN25. It is best to use threads to indicate the size of the diameter of the small-diameter threaded ball valve.

A quarter tooth is 1 2" (nominal diameter.)

1 2 inches), 14 teeth per inch, and a six-point tooth refers to 3 4" (nominal diameter 3 4 inches), 14 teeth per inch, pitch.

The size of the 6-point ball valve is 15-200mm, its structure is simple, small size, light weight, tight and reliable, it has two sealing surfaces, and the sealing surface material of the ball valve is widely used in various plastics, with good sealing, complete sealing, and has been widely used in the vacuum system.

DN25 Ball Valve: Inner grain ball pieces with an inner diameter of 1 inch (mm) are connected to each other. g1"of pipe threads.

large diameter, pitch.

Trail. DN25 Internal Threaded Ball Valve: Internal Threaded Valve with an Inner Diameter of 1 inch (mm). The DN25 female threaded ball valve can be connected with pipes, fittings and fittings of the same specification (DN25).

Extended Information: Female Thread Ball Valve and Butt Weld Ball Valve for Operating Temperature -29 180 (Seal.

for the reinforcement of PTFE.

or -29 300 (the seal is para-polystyrene) for cutting off or connecting the medium in the line. Different materials can be used for water, gas, steam, oil and nitric acid.

acetic acid and other media.

The fluid resistance is small, and its resistance coefficient is equal to that of a pipe section of the same length. Simple structure, small size and light weight. Tight and reliable, the sealing surface material of the ball valve is widely made of plastic, with good sealing, and has also been widely used in vacuum systems.

It is easy to operate, quick to open and close, and only needs to rotate 90° from full open to full closed, which is convenient for long-distance control. It is easy to maintain, the structure of the ball valve is simple, the sealing ring is generally movable, and it is more convenient to disassemble and replace.

When fully open or fully closed, the sealing surface of the ball and the valve seat is isolated from the medium, and when the medium passes, it will not cause erosion of the sealing surface of the valve. Wide range of application, diameter.

Ball valve DN19, DN25, DN32, DN38, DN51 bore conversion to inches is as follows:

DN20 – 3 4 inches (DN19 is similar to DN20).

DN25 – 1 inch.

DN32 – 11 4 inches.

DN40 - 1 1 2 inches (DN38 is similar to DN40).

DN50 – 2 inches (DN51 is similar to DN50).

dn stands for the internal diameter of the pipe in millimeters. DN25, for example, is 25 mm.

Definition of Fraction Valve: Indicates the internal diameter of the pipe in inches.

As defined by international standards, 1 inch = centimeter.

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 <>