1. Product introduction:
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. 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.
2. Product characteristics:
The advantages are specially marked in comparison with traditional flap valve:
A) Open and close automatically in security and reliability according to hydraulic difference without noise and in no need of operator and maintenance.
B) Positive start has little water resistance and start-up pressure and the flow can be adjusted naturally according to hydraulic pressure.
C) Reserve cut-off has good seal without leakage to prevent from flowing backwards. The back pressure is higher and the effect is barrier.
D) Anticorrosion, aging resistance, deformation resistance, strong adaptability and long use life
E) Wide size scope, nominal diameter of DN50-DN3000.
3. Installation structure type
1) Belled XF-T---installed at the exit of drainage pipe
2) Flanged XF-T---installed at the exit end with flange of drainage pipe
3) Mounting plate XF-F---installed on the building at the water exit end.
4) Build-in XF-F---installed at the exit end of rain and sewage system in cities.
5) Grout or cement pipe XF-T---installed at the end of grout or cement pipe.
4. 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 |
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!
