Product Profile
Tri-offset butterfly valve is widely used in oil and gas industry (storage, tank area, airport storage tank, chemical storage, etc.), process industry (refinery, chemical and petrochemical plants, etc.), HUHANG found that the low torque of the triple offset butterfly valve is the truth of a long life. Through modeling, simulation, structural optimization, material optimization and process optimization, constantly achieve technological breakthroughs, breaking the minimum torque record, meet customer requirements for long life, two-way seal, low torque, low leakage valves.
Product Line
Low internal leakage: internal leakage meets the requirements of class API 598 and class FCI70.2 VI;
Two-way Seal: the reverse seal could meet the leakage requirements of API 598 and FCI70.2 VI;
Low torque: butterfly plate adaptive design and extended sleeve design, reduce butterfly valve torque;
Long life: low torque to reduce seal surface damage, to achieve long life (torque is life);
Interchangeable seats and seals
Effective bandwidth ratio is 80%
Seal Pair 100% Fit
Good design, excellent equipment and strict technology to ensure that the fit rate between sealing surface is 100%, no metal interference. Switch 20 rounds after the formation of the seal band traces.
Features:
1. Continuous integrity;
2. Clear traces;
3. Uniform width;
4. No scratch damage;
5. Effective bandwidth ratio is greater than or equal to 80% (effective bandwidth ratio = trace bandwidth/total width of seal ring)
As long as the triple-offset butterfly valve has the above characteristics, then it is inevitable that the torque is small, the force is even, and the sealing surface is wide, there will be no stress exceeding the allowable stress leading to premature failure of the sealing surface, that is, long product life.
The Seat and the Sealing Ring Have Spare Parts
Butterfly valve is high precision equipment, complete process and tooling and reliable engineering ensure that the valve seat and seal ring can be renewed. If the valve seat or sealing ring seal surface damages, by replacing the valve seat or sealing ring improve the speed of repair, do not need to change or manufacture new valve.
Multi-level Seal Ring Structure
Unique multi-layer sealing ring design, 0.5~0.8mm ultra-thin graphite or PTFE layer, ensure the decrease of shedding of graphite or PTEE under the erosion in use, that improves the abrasion resistance and scour resistance of sealing ring, improvethe service life of sealing ring to ensure that the graphite or PTFE in use due to fluid erosion caused by the shedding, the utility model effectively improves the abrasion resistance and scour resistance of the sealing ring, and improves the service life of the sealing ring.
Full Metal Seal Ring
The full metal seal ring extends the application range of the triple offset butterfly valve, and the sealing surface material can be selected according to the actual working conditions, it is the ideal choice for butterfly valve under high pressure difference, solid material, high frequency, high temperature and other bad working conditions.
Blow-out Proof Structure
The lower end of the valve stem is provided with an open ring, and the stem is connected with the valve body with a step to limit the position, when the media pressure increases, the open-loop limit the stem upward movement, avoid the stem being blown-out.
