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.

7. Certificates:

passed the ISO9001 certificate as well as CE,ISOetc.

8. Fast delivery time:

have the stock, fast delivery time could be guarantee.

9. Packing:

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.

WORKING PRINCIPLE

Actually depends on the transmission mode of the valve, generally divided into the following three aspects:

1. Principle of pneumatic cryogenic valve: Inflate and deflate through the cylinder of the valve head to control the movement of the valve core driven by the transmission mechanism, and finally achieve the purpose of controlling the flow area and controlling the flow.

2. Principle of manual cryogenic valve: Generally, the movement of the spool is controlled by the handwheel, so as to control the flow area of the valve to control the flow.

3. The principle of the solenoid valve above the pneumatic valve: In this case, the exhaust and inflation of the cylinder are controlled by controlling the power on and off to control the transmission mechanism, and finally achieve the purpose of controlling the flow.