Note: For more than two times of switching (excluding the second time), sealing grease must be added to make up for the natural leakage of sealing grease due to over-frequency switching, so as to ensure the dosage of sealing grease in the valve body. If you need to repeat the switch pressure test several times, follow the above requirements and so on.
The customer should provide the valve type, size, pressure, temperature, and description, etc.
In the case that the customer does not provide the structural length, our company installs API 6D as the standard
In the case that the customer does not provide the flange standard, our company installs it with ANSI B 16.5a as the standard
Please provide standard number and detailed information
1 The operating pressure shall not exceed the pressure in the product performance specification table and the operating temperature of the product.
2 When the valve is installed horizontally, the valve should be supported accordingly, especially to prevent the large-diameter valve driver from damaging the valve due to gravity.
3 When cleaning the pipeline, the valve should be in a fully open state.
4 Valves with cleaning pipes should be cleaned regularly (preferably once a week), and the specific cycle depends on the specific working conditions;
5 Take measures to prevent long-term violent vibration of the valve on the pipeline to avoid fatigue failure and leakage of the valve.
6 The valve must not replace the packing under pressure, and the upper sealing structure is not a reason for the user to replace the packing under pressure.
7 The design of this valve has not carried out life calculation, test and fatigue strength check, and the user must regularly check and replace it during use.
8 The design of this valve does not consider the seismic load, and the manufacturer is not responsible for the consequences caused by this.
9 The valve must be protected when installed in the open air.
10 During the use of the valve, the stem, stem nut and bearing should be lubricated once a week to ensure that the valve can be opened and closed flexibly.
1 The detailed valve and pipe flange installation method are as follows
2 The position of the valve installation pipe is as shown in the figure below (the valve can be installed in various positions, but we recommend using it in the most suitable position):
3 The valve can only be installed in one direction. The direction of the sealing ring is consistent with the flow direction of the medium. The user must confirm the flow direction of the medium and install the valve in the direction of the arrow on the valve body.
4 After the flanged valve is welded and installed on the pipe flange, do not install the valve immediately. The pipe work can only be carried out after normal temperature. It is absolutely forbidden to weld the pipe after the valve is installed on the flange;
5 When installing the valve, you should consider the convenience of operation, and install the valve in an easy-to-operate place as much as possible;
6 Tighten the bolts on the flange according to the above installation method. The pipe bolts should be tightened diagonally. Be careful not to tighten unilaterally. Unilateral tightening may cause leakage;
Note! It is advisable to use proper force when screwing the fastener bolts to achieve a complete seal between the flange and the valve.
1 The valve is forbidden to be transported by hanging on the handwheel with a hook
2 Before the valve is used, both ends of the flow channel must be plugged with valve sleeves to prevent dust impurities from entering, and there must be plug sleeves to protect the sealing surface. Keep the valve dry and ventilated. When the valve is not used for a long time, the inner cavity of the valve should be cleaned. Clean, additionally coated with anti-rust oil to prevent rust.
3 Before the valve is installed, it is necessary to check whether there is any impurities in the valve cavity, and check whether the valve is open or closed.
4 The valve must be installed in the pipeline in a horizontal state, and must not be suspended, inclined, etc., and a bracket must be provided in the suspended position.
5 Each time the valve is opened and closed, the valve position indicator must be in the same position as described above.
6 When the valve needs maintenance in the pipeline, the valve should be in a half-open and half-closed state, and then withdraw for maintenance
7 During the use of the valve, check the tightness of the bolts and nuts, and stop when necessary.
1 It is necessary to verify that the upstream and downstream pipelines of the valve have been relieved of pressure before disassembling.
2 Care must be taken to prevent damage to the sealing surface of parts, especially non-metal parts, when disassembling and reassembling.
3 The bolts on the flange must be tightened symmetrically, gradually and evenly during assembly.
4 Metal chips, fibers, grease (except those specified for use), dust, other impurities, foreign objects, etc., should not be allowed to contaminate, adhere or stay on the surface of the parts or enter the cavity during assembly.
1.The pipelines before and after the valve are ready, the pipelines should be coaxial, and the sealing surfaces of the two flanges of the flange connection valve should be parallel. The threaded connection valve thread should be intact. The thread standard should match the valve. The pipeline should be able to bear the weight of the valve, especially when the valve is installed lying flat, proper support should be made to the valve to prevent damage to the valve parts.
2.Purge the pipes before and after the valve to remove oil stains, welding slag and other debris in the pipes.
3.Check the mark of the valve to find out that the valve is intact. Fully open and close the valve several times to confirm that it is working properly
4.Remove the protective parts on the connecting ports at both ends of the valve.
5.Check whether there is any foreign matter in the flow passage in the valve. Even if there are only small foreign matter between the valve plate and the sealing surface, it may damage the sealing surface of the valve seat.
New Year’s greetings
Strive for a New Era Strive for a New Journey
Starting a New Journey Realizing a New Leap
New Year’s greetings
The rhythm returns to the spring, and the myriad phenomena begin to renew
On the occasion of farewell to the old and welcoming the new, the Chairman of Lixin Valve, on behalf of our leadership, would like to express our sincere wishes to leaders and colleagues at all levels who have long cared about and supported the development of the enterprise! Sincere greetings to all employees and your families!
Summary 2022
Years go by, and God rewards diligence
Looking back on 2022, we have come all the way, not only with the hardships of trekking, but also with the pride of striving, and even with the joy of success. In this year, Lixin closely followed the pulse of the times, seized development opportunities, adhered to the principle of “people-oriented, sincere service”, and aimed at “building an outstanding brand of Lixin valves”. This year, we deeply promoted the intelligent construction project of Lixin, deepened digital transformation, and deeply grasped the spirit of the times, forming a corporate spirit of “integrity, teamwork, learning, and innovation”. In 2022, every great partner of Lixin Valve deserves respect and commendation!
Looking forward 2023
Calm is the tide and the banks are broad. Gentle is the wind and the sail is stretching.
Looking forward to 2023, we will meet more new challenges. We need to be pragmatic and enterprising, adhere to the development concept of “Integrity Let us Root in the Valve World”, fully devote ourselves to building our digital future new factory, establish intelligent production workshops, improve the standardized management service system, and focus on cultivating corporate culture, improving innovation capabilities, implementing talent construction, and improving the quality of all employees, fully promote the transformation and development of digital intelligence and implement the new vision.
New Year’s Encouragement
Don’t forget your original intention and forge ahead
Over the years, Lixin has maintained its original intention, adhering to the principle of taking customers as the center and striving for the foundation. Along the way, it has worked together with more partners to work hard and unswervingly for the better development of the enterprise. In the new year, let’s continue to forge ahead with determination, forge ahead with courage, create new brilliance, and strive to write a new chapter of development!
At the sound of the New Year’s bell, let us sincerely wish the great motherland prosperity, prosperity, and peace! Wish Lixin Valve Group a better tomorrow; I wish the people of the whole country a happy New Year, prosperity, health, and happiness for the entire family!
GET A QUOTE
