Specifications
Expansion bellows
1. Stainless steel bellows
2. Hydraulic pressure forming
3. Bushing or flange
4. High pressure resistant
Features and use of valve expansion bellows
Corrugated pipe adopts multi-layer structure, than single layer to reduce the stiffness, increasing the displacement, to shorten the length of the valve.
1. The design specification
On the basis of relevant standards specified in the valve design manual stem diameter, smallest minimum opening stroke and corrugated component by external pressure welding form of graphic design, corrugated pipe component structure is reasonable, compact, is helpful to the design of the valve structure miniaturization.
2. The main technical specifications
Using range: The product is suitable for the corrugated pipe cut-off valve, corrugated pipe gate valve, throttle valve, bellows wave spinning tube regulator, etc.
Nominal diameter: 16250
Nominal pressure.: PN1.6 PN2.5, PN4.0 PN6.4, PN10.0, PN14.0.
Expansion bellows design pressure form the outside pressure, pressure is 1.5 times the nominal pressure.
Working temperature: - 196 ° C -- 1000 ° C
nominal diameter DN |
length L |
axial displacement |
horizontal displacement
mm |
deflexion angle
a1+a2 |
mm |
inch |
extension mm |
compression mm |
32 |
1 1/4 |
95 |
6 |
9 |
9 |
15 |
40 |
1 1/2 |
95 |
6 |
10 |
9 |
15 |
50 |
2 |
105 |
7 |
10 |
10 |
15 |
65 |
2 1/2 |
115 |
7 |
13 |
11 |
15 |
80 |
3 |
135 |
8 |
15 |
12 |
15 |
100 |
4 |
150 |
10 |
19 |
13 |
15 |
125 |
5 |
165 |
12 |
19 |
13 |
15 |
150 |
6 |
180 |
12 |
20 |
14 |
15 |
200 |
8 |
210 |
16 |
25 |
22 |
15 |
250 |
10 |
230 |
16 |
25 |
22 |
15 |
300 |
12 |
245 |
16 |
25 |
22 |
15 |
350 |
14 |
255 |
16 |
25 |
22 |
15 |
400 |
16 |
255 |
16 |
25 |
22 |
15 |
450 |
18 |
255 |
16 |
25 |
22 |
15 |
500 |
20 |
255 |
16 |
25 |
22 |
15 |
600 |
24 |
260 |
16 |
25 |
22 |
15 |
700 |
28 |
320 |
16 |
25 |
22 |
15 |
800 |
32 |
340 |
16 |
25 |
22 |
15 |
900 |
36 |
370 |
16 |
25 |
22 |
15 |
1000 |
40 |
400 |
18 |
26 |
24 |
15 |
1200 |
48 |
420 |
18 |
26 |
24 |
15
|
Henan Liwei Industry Co. Ltd, established in 1983, is a leading manufacturer specializing in processing various steam, water, wind pipe expansion joints and compensation joints, and a main base for producing crushers and superfine grinding mills.
Liwei is the appointed enterprise by the former chemical industry ministry, national construction ministry and general petrol chemical company, member unit of China Water Supply Association and Power Equipment Network Union, and joints production unit recommended by China Water Association and National Metallurgy Ministry.
Based on the scientific management mode of modern enterprises, the company owns advanced process, strong technical strength, leading production equipment and complete testing instruments and apparatus, and it has 5 senior engineers, 16 engineers, 30 senior technicians and about 300 employees. With a set of effective service system, the company has formed a service team characterized of honesty and credit, planned site for clients free of charge as well as design and installation of foundation drawings and flow drawings. It can provide professional technical training, dispatch technicians for installation and commissioning in suit.
VTM Series Grinding Mill is the new product of Liwei in 2005, which have been granted certificates of national invention patent and utility model patent (Patent No.: ZL200510017387.2). The superfine vertical roller-based mill was developed and produced by Lu Fucai, a famous mill expert at home, professor Xu Changbai from Zhengzhou University and our company, and it is popular among users after it is put into practice. The mill is an original product with power on the grinding head which borrows advanced technologies at home and abroad. It has characteristics of low vibration, low noise, low energy consumption and high output, etc.
Liwei company has been equipped with rich technical strength, excellent design and complete products test measures. We also own a set of strict management system and high-quality technicians. In 2004, we have gained ISO9001 and ISO14001 certificate.
Insisting on the rennet "Development Through Technology, Making More Friends, Creating Green Environment and Responsible For Future", the company has been devoting itself to creating top products and well serving all clients around the world.
