Butterfly valve model and installation | Butterfly valve overview and model preparation instructions

â– 1. Overview
With the continuous advancement of science and technology and the continuous updating of products, the demand for industrial valves has been significantly improved. The use of butterfly valves has evolved from normal temperature and low pressure to high temperature and high pressure, as well as wear and corrosion resistance. Because butterfly valve has the advantages of small size, light weight, flexible operation, convenient installation and large circulation capacity, it has been used in food, medicine, petroleum, chemical, environmental protection, high-rise buildings, water supply and drainage, metallurgy, mining, textile, energy and other fields. A large number of other valves such as gate valves and globe valves have been replaced. The main products developed by our factory include: hard and soft sealing butterfly valves, ventilation butterfly valves and retractors. Introduce and digest foreign advanced technology, and strictly control according to the requirements of ISO9001 international quality system in the process of design, manufacture and inspection. This product can also be configured according to the customer's configuration, and can be supplied in four types: pneumatic, electric, worm gear and manual.
â– 2. Features and uses
The butterfly valve has compact structure, small volume, light weight, flexible operation, good sealing performance, small fluid resistance, long service life, convenient installation and high temperature resistance. At the same time, the three eccentric structure is adopted, and the connection form is a clip type, and the flange connection type and the welding type can also be adopted. Nominal pressure: PN0.1Mpa ~ 6.4Mpa, nominal diameter: DN32 ~ 2500mm, working temperature -80 ~ 550oC, material: cast steel, stainless steel, alloy steel. Suitable for pipeline equipment such as steam, oil, nitric acid, oxidizing media and drainage.
â– 3. Model preparation
Type code (D means butterfly valve) structural form code (Table 1) Connection form code (Table 2) Transmission mode code (Table 3) Seat sealing surface or lining material code (Table 4) Nominal pressure code body material code (Table 5 )


Table I       Table II

structure type

Code

structure type

Code

Lever type

0

Flange

4

Vertical plate

1

Pair of clips

7

Sloping plate

3

welding

6


Table 3 Table 4

transfer method

Code

Seat sealing surface or lining material

Code

Worm gear

3

alloy steel

H

pneumatic

6

Fluoroplastic

F

Hydraulic

7

Cemented carbide

Y

electric

9

Copper alloy

T


Table 5

Valve material

Code

Valve material

Code

WCB

C

CF8 ( 304 )

P8

1Cr5Mo ZG1Cr5Mo

I

CF3 ( 304L )

P3

1Cr18Ni9TiZG1Cr18Ni9Ti

P

CF8M ( 316 )

R8

1Cr18Ni12Mo2TiZG1Cr18Ni12Mo2Ti

R

CF3M ( 316L )

R3

■      Product adoption standard: JB/T8527-97

Flange connection size: GB9113.1-9113.26-88 integral steel pipe flange;

GB9115.1-9115.36-88 butt welded steel pipe flange;

Structure length: GB/T5188.2-94 the length of the structure of the clip-on connecting valve;

GB/T12221-89 flange connection metal valve structure length;

Pressure test: GB/T13927-92 general valve pressure test.

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