D643H Triple Eccentric Butterfly Valve

D643H hard seal eccentric butterfly valve description:

Flange butterfly valve, mounting between flanges PN10/PN16/A150, with gear box.

The range of WESDOM valves can be used for overground installation, in valve chambers and buried systems.butterfly valves in a range of DN 150 to 2000 mm and PN 10, 16 and 25 bar have been designed to isolate the flow of fluid in:

①Potable water supply pipelines and treatment plants.

②Transportation of filtered and recycled water.

③Irrigation distribution networks.

④Water-pumping stations and hydroelectric plants.

⑤Reservoirs.

The range of WESDOM valves can be used for overground installation, in valve chambers and buried systems. It includes a full range of operating accessories and actuators.

WESDOM valves are installed all over the Asia,Africa continent, the Middle East and throughout Europe. They have justifiably acquired a faultless reputation for their durability, reliability and quality worldwide.

D643H hard seal eccentric butterfly valve characteristic:

①Body adopts integral casting technology, compact structure, small volume and light weight;

②Disc three ccentic mounting. When closed, disc expands outwards to achieve the best peripheral seal; When opened, disc and seal ring quickly separated, effectively prevent the seal ring wear;

③Sealing ring design is novel, simple and maintenance-free;

④Sealing ring form is multi-level metal hard seal,suitable for harsh working conditions;

⑤Due to the use of three eccentric structure, the operating torque is greatly reduced;

⑥The flow resistance is small, the rated flow coefficient is large, about 3 times that of the same caliber single-seat valve;

⑦Strong self-cleaning ability, long service life;

⑧Standard actuators (pneumatic piston and electric) are interchangeable.

Basic Structure And Sealing Ring Form:

Eccentric butterfly valve design has three eccentricity: 

The rotation axis of the valve plate deviates from the cross section center of the sealing surface of the valve plate(H1; 

The axis of rotation deviates from the center of the pipe (H2). The rotation axis of the valve seat forms an Angle a ° with the axis of the valve body channel to form three eccentricities.

When it is opened, all points on the sealing surface of the valve plate are separated from the sealing ring at the same time, and there is no extrusion between the valve plate rotation and the sealing ring, which improves the life of the sealing ring. The sealing surtace can be automatically adjusted to maintain the best sealing effect. Multilayer composite sealing ring, leakage level is Vl, zero leakage. When theall-metal sealing ring is used, the leakage grade is V. 

 

A D643H Hard seal butterfly valve is a type of butterfly valve with a unique design that allows for a tighter seal and better performance in high-pressure and high-temperature applications. 

Some common applications of D643H Hard seal butterfly valve include:

1. Oil and gas industry: 

D643H hard seal butterfly valve are commonly used in the oil and gas industry for regulating the flow of various fluids and gases, controlling pressure, and isolating different parts of the system.

2. Chemical processing: 

D643H hard seal butterfly valve are widely used in chemical processing industries for regulating the flow of various chemicals and fluids, controlling pressure, and isolating different parts of the system.

3. Power generation: 

D643H hard seal butterfly valve are used in power generation plants for regulating the flow of steam and gas, controlling pressure, and isolating different parts of the system.

4. Water treatment: 

D643H hard seal butterfly valve are used in water treatment plants for regulating the flow of water, controlling pressure, and isolating different parts of the system.

5. HVAC systems: 

D643H hard seal butterfly valve are also used in heating, ventilation, and air conditioning (HVAC) systems for regulating the flow of air and controlling temperature and humidity.