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.
After-sales Service
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
Function Of Valve
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.
