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. (the former Henan Liwei pipeline Equipment Co. Ltd), located at Shangjie District, Zhengzhou city, is a manufacturer specializing in processing flexible rubber joint, expansion joint, metal expansion joint, steel bellows, rubber bellows, dismantling joint, non-metal compensatory, rubber lined pipe and rubber lined pipe fittings. It is also 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.
Our Liwei brand flexible rubber joints have various heavy calibers, types and high quality in the country. The products series have won four patents and our company is name "Quality and Credit Unit" by Henan Province. Our products have become the first choices for national power design, municipality and metallurgy units.
At present, our products include four serial flexible rubber joints, three types, tens of standard and common specification, eight series of metal pipe losing compensation joints and fourteen standard specifications and types, eleven types of standard and common specification products for four serial wind pipe non-metal compensators. Our annual comprehensive production capacity can reach over forty thousand sets and we also process various pipe joint matching flat welding flanges (steel international/non-international standard). Our products have been sold in over thirty cities and autonomous regions. With China`s entry to the WTO, our products have been exported to foreign countries as Italy, Spain, Pakistan, Singapore and East European countries, etc. And the products have become public famous brand products for design units and clients.
Our 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, Liwei brand products will be a red line between we and the clients for ever.
Why Choose Henan Liwei Industry Co., Ltd.
(1)Leader manufacturer of expansion joint in China;
(2)More than 24 years experience of manufacture of expansion joint;
(3)The Main Drafter of Chinese Standard (GB/T 26121-2010) rubber expansion joint;
(4)Approved supplier for nuclear power industry;
(5)Compensator engineering research center of Zhengzhou city (Approved by National Development and
Reform Commission);
(6)Member of CNEA(China Nuclear Energy Association );
(7)ISO9001: 2008 and ISO14001: 2004 certificated by CNAS(China National Accreditation Service for
Conformity Assessment);
(8)The largest vulcanizing equipment in China(DN 5000mm*15000mm);
(9)Manufacturer the largest rubber expansion joint in China(DN3600);
(10)Strict quality control system;
(11)Professional after-sale service team;
(12)Strong R&D strength;
Welcome to contact us freely!
