Sealing performance Valve sealing performance refers to the sealing of the valve to prevent leakage of the ability of the media, it is the valve of the most important technical performance indicators. There are three parts of the valve seal: opening and closing parts and valve seat seal between the two contacts; filler and the stem and packing box with the Department of the valve body and the valve cover connections. One of the leaks is called leakage before, which is commonly referred to as lax, it will affect the ability of the valve to cut off the medium. For cut-off valves, internal leakage is not allowed. After the two leaks called leakage, that is, the medium leaked from the valve to the valve. Leakage will result in material loss, pollute the environment, serious accidents will result. For flammable, toxic or radioactive media, leakage is even more not allowed, so the valve must have a reliable sealing performance. Flow medium through the valve will produce pressure loss (both before and after the valve pressure difference), that is, the valve on the flow of media have a certain resistance, the media to overcome the resistance of the valve will consume some energy. From the energy conservation considerations, the design and manufacture of valves, to minimize the resistance of the valve on the flow medium. Opening and Closing Force and Opening and Closing Moment The opening and closing force and opening and closing torque refer to the force or torque that must be applied when the valve is opened or closed. Close the valve, the need to make the opening and closing seat and the seat between the two sealing surface to form a certain seal than the pressure, but also to overcome the valve stem and packing between the stem and nut thread between the stem end of the bearing and Other friction parts of the friction, which must impose a certain closing force and closing torque, the valve opening and closing process, the required opening and closing force and opening and closing torque is changing, the maximum value is in the closure of the final instantaneous or open The initial instant. When designing and manufacturing valves, they should strive to reduce their closing force and closing torque. Opening and closing speed Opening and closing speed is used to complete the valve to open or close the action required to represent. General opening and closing of the valve speed is not strictly required, but some conditions on the opening and closing speed has special requirements, if any requirements quickly open or close to prevent accidents, and some require slow closure to prevent water hammer and so on, This should be considered when choosing the type of valve. Motion Sensitivity and Reliability This is the degree to which the valve responds sensitively to changes in media parameters. The function sensitivity and reliability of valves with specific functions such as valves, pressure relief valves, regulating valves and other valves used to adjust the media parameters as well as safety valves and steam traps are very important technical performance indicators. It shows the durability of the valve life is an important performance indicators of the valve, and has great economic significance. Usually to ensure the sealing requirements of the opening and closing times that can also be used to represent the time.
Measuring Cup
Measuring Cup Set
1: More durable than the
silicone and plastic items.
2:Clearly engrave size on
the body or handle, more convenience when using .
3:They could be used for
any food, rust resistant, will not be polluted or eroded, make your cooking
always safe and health.
4: Soft silicone handles
to allow even clumsy fingers to hold tight, and smooth edge eliminate
the concerns of the hand injured.
5: Stacked and organized
in one bundle with easily removable ring, Helps to keep it together as a set and
store them in any drawer, cabinet or cupboard.
Description
of Measuring
Cup Set
Material:SS201/SS304
Handle
:some items can add silicone handle
Finishing:
Satin polishing ,Mirror Polishing ,Color painting
Logo:
Laser logo, Etching logo, Silk printing logo, Embossed logo, Decal logo
MOQ :
2000 PCS
Packaging
: White box, Mail box or Customized package
Sample
Time : 7~10 days
Lead Time
:60 days after have the deposit
Payment:
T/T ,L/C or others
Payment
term: 30% deposit before production and 70 % balance against the copy B/L
FAQ:
1:How can
I get the sample?
We can
provide the sample for customers to check the quality.
Please
kindly provide the delivery info for calculate the sample cost. If you have DHL
/TNT/UPS/FEDEX account, please also kindly provide it to us.
You can
do the payment of sample via T/T and PayPal.
2:How
about the sample time?
Usually
the sample time is 7~10 days after have the sample cost.
3:How
long will it take for mass production?
Usually
45~60 days after have the deposit.
4:Can we
have our logo or company name to be printed on your products or the package?
Welcome
OEM.
5:what
certificate can you provide?
CE,CB,GS,FDA,LFGB,ROHS
are available here.
6:How can
we get your monthly new products announcement?
Please
join our mailing lists.
Measuring Cup Set,Stainless Steel Measuring Cup,Measuring Cup With Silicone Handle,Metal Measuring Cups
Jiangmen Wellway Houseware Co.,Ltd , https://www.jmwellwayhouseware.com