Triple eccentric butterfly valve on the basis of the introduction of foreign advanced technology, the use of precision J-shaped elastic seal ring and three eccentric multi-level metal hard seal structure, for regulating the flow and load cut-off body. The valve adopts three eccentric structure, the valve seat and plate sealing surface are made of different hardness and stainless steel, has good corrosion resistance, long service life, the valve bidirectional sealing function, the product conforms to the national GB/T13927-92 valve pressure test standard.
Triple eccentric butterfly valve main structural characteristics:
- Three eccentric sealing structure, valve seat and butterfly plate almost no wear, with a tighter sealing function
- The valve body is made of stainless steel, with the double advantages of metal hard seal and elastic seal, both at low and high temperature, has excellent sealing performance, corrosion resistance, long service life and so on
- The sealing surface of the plate adopts surfacing cobalt-based hard alloy, which is resistant to wear and has a long service life
- Quilted structure, high strength, large flow area, small flow resistance
- Two-way sealing function, installation is not limited by the flow direction of the medium, also not affected by the spatial position, can be installed in any direction
- The drive unit can be installed in multiple stations (rotation 90° or 180°) for easy use
Triple eccentric butterfly valve performance specification parameters:
- Nominal pressure: PN1.0 ~ 2.5MPa
Nominal diameter: DN50 ~ 2400mm
- Body material: cast steel/stainless steel (304/316/316L)
- Connection mode: clamp type, flange type
- Operating temperature range: -29 ~ 425℃
- Drive mode: worm gear drive, electric, pneumatic, hydraulic
- Applicable media: water, air, natural gas, oil and weakly corrosive fluids
LTD371Y Hard seal butterfly valve uses and characteristics:
LTD371Y hard seal butterfly valve main structural characteristics for the clamp and flange type three eccentric structure, and 815, 830L series of butterfly valve main structural characteristics for the valve body periphery with convex and designed into a screw hole single flange structure, 815, 830 series butterfly valve is widely used in petroleum, chemical and industrial environmental protection water treatment, high-rise buildings, water supply and drainage pipelines.
LTD371Y Hard Seal butterfly Valve Features:
Due to the use of three eccentric structure, reliable sealing performance, to ensure that the opening of the butterfly plate does not contact the seal seat, eliminate the uneven load of the seal seat, prolong the service life, to ensure reliable sealing performance, with high temperature resistance, wear resistance, corrosion resistance and other advantages.
Adoption standard
Design standard :API609-83
Flange connection size :ASME B 16.5
Construction length :ASME B 16.10
Pressure test :API 598
Butt welding butterfly valve features:
1, the use of three eccentric butterfly valve is called the top process valve, this design makes the valve for high temperature, high pressure, fire applications of bubble seal ideal hard seal butterfly valve.
2, because of the welding structure, the valve and pipeline plane to achieve permanent zero leakage.
3. The valve has no flange, which brings great convenience and beauty to the pipe and insulation dressing.
Fluorine lined butterfly valve introduction:
Fluorine lined butterfly valve is a new generation of butterfly valve products developed by our company. Precision J-shaped elastic seal ring and three eccentric multi-level metal hard seal structure, is widely used in the medium temperature ≤425℃ for gold, electric power, petrochemical, water supply and drainage and municipal construction and other industrial pipelines, for regulating the flow and load cut-off body.
Fluorine lined butterfly valve under the characteristics:
1. Truss type butterfly plate structure: high strength, large flow area and small flow resistance. Hard seal butterfly valve seat and butterfly plate almost no wear, with more view more tight sealing function.
2, metal seal butterfly valve structure: stem axis and butterfly plate sealing surface offset between A size A, and valve body channel axis offset a size B, valve seat axis and valve body channel axis to form an eccentric Angle a, so the formation of three eccentric. When the butterfly valve is opened from 0-90, the sealing surface of the butterfly plate will be immediately detached from the seat surface at the moment of opening. When it is closed from 0-90, the sealing surface of the butterfly plate will contact and press the sealing surface of the seat only at the moment of closing. However, the specific pressure of sealing can be adjusted arbitrarily by changing the external driving torque. So there is no friction between the seat and the sealing surface on the disc, eliminating the possibility of wear and leakage.
3, torque seal: three eccentric structure makes the butterfly valve closed, the sealing pressure between the sealing pair sealing surface is generated by the external driving torque of the valve stem. Not only eliminates the conventional elastic valve seat elastic material aging, cold flow, elastic failure and other factors caused by the reduction and disappearance of the seal pressure, but also through the change of external driving torque, to achieve arbitrary adjustment of the seal pressure, so as to improve the sealing performance of the three eccentric butterfly valve, butterfly valve service life is greatly improved.
4, soft and hard laminated metal seal structure: butterfly plate seal ring using soft and hard laminated stainless steel sheet and flexible graphite combination, so that it has the double advantages of hard metal seal and elastic seal, both in low temperature and high temperature conditions have excellent sealing performance.
5, two-way sealing: because the sealing surface cone Angle is less than the friction Angle of the sealing material, the butterfly plate is closed to the sealing position to realize self-locking immediately, and can withstand a certain reverse pressure impact.
6, fireproof structure: all metal structure itself has the characteristics of fire safety.
7, valve body sealing surface: change the valve using surfacing carbide or stainless steel sealing surface hardness, high strength, wear resistance, can be opened and closed more than 700,000 times without damage.
8. Sealing ring: The sealing ring is clamped on the butterfly plate by the pressure plate, which is easy to install, adjust and replace. The upper and lower parts of the valve stem are equipped with shaft sleeve to prevent wear and adhesion and greatly improve the service life.
9, the large size of the plate quilted structure, high strength, large flow area, flow resistance is small.
