PN40 SS304 SS316 Liquid Gas Cryogenic Low Temperature Valve

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.

1. Deadline and open medium
The flow channel is a straight-through valve, and its flow resistance is small, and it is usually selected as a valve for shut-off and open medium. The downward closing valve (stop valve, plunger valve) is rarely used because of its tortuous flow path and higher flow resistance than other valves. Where higher flow resistance is allowed, a closed valve can be used.
2. Control flow
Usually choose a valve that is easy to adjust the flow as the control flow. Downward closing valves (such as globe valves) are suitable for this purpose because the size of its seat is proportional to the stroke of the closing member. Rotary valves (plug valves, butterfly valves, ball valves) and flex-body valves (pinch valves, diaphragm valves) can also be used for throttling control, but they are usually only applicable within a limited range of valve diameters. The gate valve uses a disc-shaped gate to cross-cut the circular valve seat opening. It can only control the flow better when it is close to the closed position, so it is usually not used for flow control.
3. Reversing and shunting
According to the needs of reversing and shunting, this valve can have three or more channels. Plug valves and ball valves are more suitable for this purpose. Therefore, most of the valves used for reversing and splitting select one of these valves.
But in some cases, other types of valves can also be used for reversing and shunting as long as two or more valves are properly connected to each other.
4. Medium with suspended particles
When there are suspended particles in the medium, it is suitable to use a valve with a wiping effect on the sliding of the closing part along the sealing surface. If the back and forth movement of the closing member to the valve seat is vertical, it may hold particles. Therefore, unless the sealing surface material allows particles to be embedded, this valve is only suitable for basic clean media. Ball valves and plug valves have a wiping effect on the sealing surface during the opening and closing process, so they are suitable for use in media with suspended particles.