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
Valve Installation Points
Valve installation points
Many valves are directional
For example, stop valve, throttle valve, pressure reducing valve, check valve, etc., if installed upside down, it will affect the use effect and life (such as throttle valve), or it will not work at all (such as pressure reducing valve), or even Cause danger (such as check valve). Normal valves have direction signs on the valve body. If not, it should be correctly identified according to the valve working principle.
The valve cavity of the shut-off valve is asymmetrical, and the fluid should pass through the valve port from bottom to top, so that the fluid resistance is small (determined by the shape), and the opening is labor-saving (because the medium pressure is upward), and the medium does not press the packing after closing, which is convenient for maintenance , This is the reason why the globe valve can not be reversed. Other valves also have their own characteristics.
The valve installation position must be easy to operate
Even if the installation is temporarily difficult, it is necessary to consider the long-term work of the operator. It is best to keep the valve handwheel flush with the chest (usually 1.2 meters away from the operating floor), so that it is easier to open and close the valve. The hand wheel of the floor valve should be upwards, not tilted, to avoid awkward operation. The valve of the wall machine and the equipment should also leave room for the operator to stand.
It is necessary to avoid operation on the sky, especially acid and alkali, toxic media, etc., otherwise it is very unsafe.
Do not install the gate upside down (that is, the handwheel is down), otherwise the medium will remain in the valve cover space for a long time, which will easily corrode the valve stem, and it is contraindicated by certain process requirements. At the same time, it is extremely inconvenient to replace the packing. The exposed stem gate valve should not be installed underground, otherwise the exposed stem will be corroded due to moisture.
When installing the lift check valve, ensure that its valve flap is vertical for flexible lifting. For the swing check valve, ensure that its pin shaft is level during installation to allow flexible swing. The pressure reducing valve should be installed upright on a horizontal pipe, and not inclined in all directions.