Industry News

The choice between a lever handle and a gear operator (worm gear) for a butterfly valve mainly depends on pipe diameter, working pressure, frequency of operation, as well as considerations of effort and cost. In short: Lever-handle butterfly valve: Simple structure, low cost, and quick to open/close. Suitable for small diameters (typically DN ≤ 200 mm), low pressure, and infrequent operation. Gear-operated butterfly valve: Uses a worm gear reducer for transmission, making operation easier, with better sealing and longer service life. Suitable for large diameters (typically DN > 200 mm), medium/high pressure, frequent operation, or applications requiring precise flow regulation.

Hard seal and soft seal are the two most fundamental sealing methods for valves. Their fundamental difference lies in the material of the sealing pair (the contacting parts when the valve is closed). Simply put: A soft seal is like a "rubber gasket"—it has good elasticity, can achieve zero leakage, but cannot withstand high temperatures or high pressures. A hard seal is like "metal-to-metal"—it is stronger, more durable, suitable for harsh conditions, but its sealing performance is slightly inferior.

Does the double eccentric butterfly valve have a pinless design? if not sure, please check this passage!

The valve standards system is quite extensive and can be broadly divided into three main categories: Chinese National Standards (GB), Industry Standards (JB, SY, etc.), and International/Foreign Standards (ISO, API, ASME, etc.). Together, they form a complete hierarchy covering basic requirements, product design, and inspection methods.

The most fundamental difference between a concentric (or resilient-seated) butterfly valve and an eccentric butterfly valve lies in the relative position of the stem axis, the disc center, and the valve body bore center. This structural difference determines their varying performance, applicable working conditions, and costs.

"Lug-type connection" typically refers to the method of installing a lug-style butterfly valve between pipe flanges. This connection method is very common in industrial piping systems. It gets its name from the valve body having "lug" structures with bolt holes.