Bidirectional flow hard contact hard seal rotary ball valve

Overview of bidirectional flow hard seal rotary ball valve

Bidirectional flow hard contact hard seal rotary ball valveNot only can it reliably cut off under positive pressure, but it can also reliably seal under reverse pressure or when the reverse pressure is much greater than the positive pressure. The valve seal adopts the structure and principle of a hemispherical valve, and the outer shape adopts a butterfly structure, thus having the characteristics of small volume and light weight; And it has the properties of bidirectional hard sealing, low sealing friction, durability, and lightweight opening and closing, so its cost-effectiveness is much higher than that of half globe valves. The successful development and application of this valve is a major technological innovation in the valve industry. Hard impact eccentric ball valves are widely used in applications that require bidirectional sealing, such as water pump outlet ends, pipeline systems, recycled water systems, high-level water tanks, sewage systems that are prone to flooding, and anti backflow systems. They can be used in industries such as metallurgy, mining, petrochemicals, chemical engineering, power, environmental protection, and municipal engineering as pipeline opening, closing, and regulation. In a bidirectional flow system, one valve is equivalent to two ordinary one-way sealed valves.

　　Bidirectional flow hard contact hard seal rotary ball valveMost of the valves in the pipeline network system are mainly used to cut off and regulate the medium. These valves account for a large proportion and have a high usage in the entire system, requiring them to be durable and cost-effective. At the same time, they should be able to regulate and load cut off the medium in the forward flow direction, and prevent the medium from flowing back during pressure difference changes or maintenance, that is, they should have a bidirectional cutting function. At present, these valves are mainly used in pipeline systems, including globe valves, gate valves, butterfly valves, and ball valves. Globe valves and gate valves have good bidirectional shut-off function, good sealing performance and service life, both of which are one of the pioneers of valves. However, globe valves are inherently limited by the structure of the globe valve, with a large appearance and high operating torque, making it impossible to produce large diameters. Currently, only DN400 is available on the market; Gate valves do not have regulating functions, and there is a significant risk of gate detachment when used to regulate flow. Large diameter gate valves, with their large size and height, are also difficult to manufacture and transport. Compared with gate valves, butterfly valves have the characteristics of shorter opening and closing time, smaller operating torque, smaller installation space, and lighter weight. Some division of labor uses butterfly valves instead of gate valves. However, the sealing performance of butterfly valves has not always met market requirements. Except for the midline lined rubber butterfly valve, which can seal in both directions within a certain pressure range, other structures are basically unidirectional flow. The midline structure is limited by rubber and cannot be popularized. After improvement, bidirectional butterfly valves with stainless steel elastic sheet structures have appeared on the market, but their prices are high. At present, it is mainly used in pipelines with important media such as oil, natural gas, and coal gas, and is less commonly used in general pipeline networks, especially in water systems.
Does a general pipeline system with a large number of valve applications have valves that are high-performance, reasonably priced, capable of bi-directional sealing, and not limited by diameter? The answer is affirmative! The bi-directional flow hard impact hard rotation ball valve is developed by combining the sealing performance of ball valves with the advantageous structural performance of butterfly valves. It not only has the practical advantages of bi-directional sealing, adjustability, and long service life of ball valves, but also has the structural advantages of small volume and light weight of butterfly valves. It is actually a butterfly structure eccentric hemispherical valve! The sealing principle combines the front end sealing of the fixed ball valve with the forced sealing of the eccentric butterfly valve, thereby achieving bidirectional high and low pressure cut-off. Advanced processes such as space plasma spraying, ether laser sputtering, and vacuum protection infiltration stack can be used to form gradient functional materials such as martensitic stainless steel, austenitic stainless steel, hard alloys, metal ceramics, and synthetic diamonds on the two sealing surfaces of the sealing pair according to different hardness requirements. It can automatically align the center (adaptive), automatically compensate for wear and tear, automatically apply sealing pressure, instantly close and open the sealing pair without friction, and the projection of the valve core continuously expands and advances when opened. It has a short structure, small volume, and can manufacture valves with large diameters, extra large diameters, super large diameters, and super large diameters. It is easy to transport, install, maintain and repair, and has a series of advantages.

Main design and manufacturing standards for bi-directional flow hard impact hard rotation ball valves

Main component materials of hard contact ball valve

Main types of hard contact and hard rotation ball valves

The main types of this valve include manual, worm gear, electric, pneumatic, and hydraulic. Pneumatic and hydraulic valves are suitable for applications with pressure gas and pressure liquid sources.

Parameter table of electric head for hard contact and hard rotation ball valve