The most reliable manufacturer
1 More than 24 years experience of manufacture of expansion joint;
2 Approved supplier for nuclear power industry;
3 Compensator engineering research center of Zhengzhou city (Approved by National Development and Reform Commission);
4 ISO9001:2008 and ISO14001:2004 certificated by CNAS(China National Accreditation Service for Conformity Assessment);
Product introduction:
1 XF rubber slowly-closing cut-off valve is a new water supply and drainage valve with full rubber structure, duck-mouthed appearance and functions of positive flow-in and reserve cut-off. According to thrust analysis and calculation as well as different operation conditions, it is manufactured with different design mechanism and different rubber products by special processing, At positive operation the water flow inform entrance and the valve will be open at weak hydraulic pressure. The hydraulic pressure is higher. The valve gate will open more greatly and the water flow is greater, At reserve operation, the valve gate closes naturally and seals tightly cut-off valve, the back pressure is higher, the valve gate closes more tightly and the seal effect is better.
2 It is used widely in various drainage exits to prevent from pouring backwards and flowing backwards in city planning, water conservancy and sewage disposal etc, it is the ideal product to replace flap valve.
Product Features:
The advantages are specially marked in comparison with traditional flap valve:
1 Open and close automatically in security and reliability according to hydraulic difference without noise and in no need of operator and maintenance.
2 Positive start has little water resistance and start-up pressure and the flow can be adjusted naturally according to hydraulic pressure.
3 Reserve cut-off has good seal without leakage to prevent from flowing backwards. The back pressure is higher and the effect is barrier.
4 Anticorrosion, aging resistance, deformation resistance, strong adaptability and long use life
5 Wide size scope, nominal diameter of DN50-DN3000.
Notice for order:
1) Users should provide filed operation conditions explain and technical requirements.
2) User should provide necessary technical parameter including nominal diameter of pipe, joint external diameter, installation type and the valves of positive star pressure and reserve cut-off back pressure.
3) Our technicians will select type and design for users according to the request of users.
| Type | Nominal dia. of pipe | L for length | H for height | C for external dia. of flange |
| XF50-150-F | 50 | 150 | 100 | 150 |
| XF80-220-F | 80 | 220 | 140 | 200 |
| XF100-250-F | 100 | 250 | 200 | 225 |
| XF150-340-F | 150 | 340 | 265 | 275 |
| XF200-420-F | 200 | 40 | 325 | 338 |
| XF250-520-F | 250 | 520 | 425 | 400 |
| XF300-620-F | 300 | 620 | 525 | 485 |
| XF350-700-F | 350 | 700 | 625 | 525 |
| XF400-800-F | 400 | 800 | 725 | 588 |
| XF450-900-F | 450 | 900 | 825 | 625 |
| XF500-980-F | 500 | 980 | 925 | 688 |
| XF600-1120-F | 600 | 1120 | 1025 | 800 |
| XF700-1180-F | 700 | 1180 | 1125 | 969 |
| XF800-1350-F | 800 | 1350 | 1400 | 1080 |
| XF900-1500-F | 900 | 1500 | 1525 | 1150 |
| XF1000-1600-F | 1000 | 1600 | 1725 | 1325 |
| XF1200-1840-F | 1200 | 1840 | 1950 | 1485 |
Packaging & Delivery:
Wooden case (Out package) and plastic film and textile membrane(inside package). We can make change according to your request.
We really appreciate your attention. Please contact us to gain more information!
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.
