Q. Are there any special requirements for OEM purchases?
A. Yes. Liangchuan requires proof of trademark registration in order to print or emboss your trademark onto the product or packaging.
Q. Do Liangchuan products come with a warranty ?
A. Yes. That's why we offer 3-year product life guarantee, and a generous1 year warranty on all purchases that begins with the bill of loading.
Q. How can I get some samples?
A. Usually we don’t offer free sample and express fee are required, the sample cost can be deducted from your first large order.
Q. What's the MOQ of your products?
A. Our MOQ is one (1) piece/set.
Q. Are you a manufacturer with your own factory?
A. Yes, we are the manufacturer for more than 8 years
Advantage Of our company
1. Excellent technology:
the technology is in the leading level in China, cooperate with the most famous
universities in China;
2. Advanced equipment:
advanced processing equipment and testing means, providing the integration of automation system solutions for product, engineering, service and training.
3. Strong team:
have many senior engineers with plenty of research, development, design
experience, providing professional service for sales and after sales.
4. Good quality:
reliable and stable quality, good performance, long life time.
5. Full series of products:
covers full category of valves, meet the general standard of every country in the world, such as GB, DIN, ASTM, BS, JIS.
6. Professional after sales service:
have the professional engineer team to provide the service.
passed the ISO9001 certificate as well as CE,ISOetc.
8. Fast delivery time:
have the stock, fast delivery time could be guarantee.
packing strictly as per the exporting standard or as per the customized request.
10. Long-term quality warranty time:
provide 12 months quality warranty time.
For your company to order valve products in our company, our factory makes the following commitments in terms of after-sales service:
1. Our company implements warranty on product quality;
2. After the contract is signed, guarantee the quality and quantity, and deliver on time;
3. The company ensures that the valve products provided meet the contract targets
4. For technical consultation of the demand side, give answers at any time;
5. When delivering the equipment, the factory delivers the following materials to the purchaser: delivery list, product certificate, product sample, product instruction manual, technical information;
After receiving a letter or a phone call from the user regarding quality issues, we guarantee a response within 24 hours to resolve the issue as quickly as possible
Installation Of Common Valves
1. Gate valve
Also known as gate valve, it is a valve that uses a gate to control the opening and closing, and adjusts the flow of the pipeline and opens and closes the pipeline by changing the cross section. Gate valves are mostly used for pipelines that fully open or fully close the fluid medium. Gate valve installation generally has no directional requirements, but it cannot be inverted.
2. Globe valve
The valve is used to control the opening and closing of the valve. By changing the gap between the valve disc and the valve seat, that is, changing the size of the channel section to adjust the medium flow or cut off the medium passage. Pay attention to the direction of fluid flow when installing the shut-off valve.
The principle that the shut-off valve must be installed is that the fluid in the pipeline passes through the valve hole from bottom to top.
Three. Check valve
Check valve, also known as check valve or one-way valve, is a valve that automatically opens and closes under the action of the pressure difference between the front and back of the valve. Its function is to make the medium flow in only one direction, and prevent the medium from flowing backwards. According to the different structure of the check valve, there are lift type, swing type and butterfly wafer type. Lift check valve is divided into horizontal and vertical.
When installing the check valve, pay attention to the flow direction of the medium and do not install it backwards.
Four. Pressure reducing valve
The pressure reducing valve is a valve that reduces the inlet pressure to a certain required outlet pressure through adjustment, and relies on the energy of the medium itself to automatically maintain a stable outlet pressure. From the point of view of fluid mechanics, the pressure reducing valve is a throttling element whose local resistance can be changed, that is, by changing the throttling area, the flow velocity and the kinetic energy of the fluid are changed, resulting in different pressure losses, so as to achieve the purpose of decompression. Then rely on the adjustment of the control and adjustment system to balance the fluctuation of the pressure behind the valve with the spring force, so that the pressure behind the valve remains constant within a certain error range.