D71X-LT Manual Butterfly Valve

Productintroduction and characteristics
The butterfly valve should be used for open, close and regulating medium flow in pipeline of petroleum, chemical, food, medicine, metallurgy, ship, can also be used in a varietyof corrosive medium, The following feature:
1. Excellent bidirectional sealing performance, Minimized operation torque.
2. Flow characteristics tend to be straight, good regulation performance.
3. Choosing different materials, can be used in corrosive medium.
4. Simple and compact structure, compact and light, easy to transport, install and
disassemble.

Output Dimensions

Application Specification

Designed As Standard: GB/T12238-2008;AWWAC504

Facetoface As Standrad: GB/T12221-2005-J1; API609

Flange As Standrad: GB/T17241.6;DIN2632\2633;BS4504JIS-B2220;ASME B16.5(CLASS150)

Test As Standrad：GB/T13927-2008;BSEN12266-1 12266-2

Product design features
1. Valve body and seat are adopted with split design for easy maintenance and replacement.
2. After machining of valve body, because of without lining rubber, to avoid the pressure deformation of the lining rubber. Which ensure the accuracy of body symmetry and reduce
the torque of butterfly valve.
3. Valve stem and valve body are equipped with 4 oil proof bearings, which is beneficial to stem support. the upper shaft hole is equipped with two O rings and one special rectangular screw ring water seal, which makes the axial seal more reliable.
4. The two ends of the valve plate shaft hole are designed with grooves, which can effectively prevent damage of valve seat caused by the excessive extrusion when valve shaft is loaded into valve the to ensure the sealing of the valve seat end face and the valve plate.
5. After quenching and tempering process, the pin material of butterfly valve has high strength and high corrosion resistance, and the connection is more safe and stable.
6. A non-pin stem adopts an anti-exit structure, spring +U type card structure are used in the upper part of the stem, which can not only compensate for installation errors, but also prevent
the stem from loosening.
7. LT type valve body is thicker than the normal wafer butterfly valve with high pressure resistance and not easy to deform.