Wafer Butterfly Valves FAQ
A lugged butterfly valve is equipped with threaded, lugged inserts on both sides of its body. This design allows for easy installation and disconnection from the process pipelines without having to completely remove the valve, making it suitable for dead-end service and frequent maintenance applications.
A wafer butterfly valve operates by rotating a disc positioned in the center of the pipe. The disc is attached to a rod, which is operated either manually or by an actuator. As the disc turns, it either allows fluid flow by moving parallel to the flow or blocks flow by standing perpendicular to it.
The primary advantages of wafer butterfly valves include their compact design, ease of installation, affordability, and efficient flow control. They are also lightweight and require less structural support compared to other valve types.
Wafer butterfly valves are widely used in various industries including water and wastewater treatment, oil and gas, chemical processing, food and beverage manufacturing, and HVAC systems.
Wafer butterfly valves are suitable for a wide range of fluids, including water, air, gases, and certain chemicals. However, they may not be ideal for high-viscosity fluids or fluids containing large solids.
These valves are often made from materials like cast iron, stainless steel, and PVC, catering to different pressure ratings and fluid compatibility requirements.
Sizing a wafer butterfly valve involves considering the diameter of the pipe, flow rate requirements, the type of fluid being controlled, and the operating pressure. Professional consultation is advised for accurate sizing.
These valves are generally more cost-effective than other types due to their simple design, which requires fewer materials and less labor to manufacture.
Maintenance typically includes regular inspections for wear and tear, checking and lubricating the stem, and ensuring the sealing surfaces are clean and undamaged. The frequency of maintenance depends on usage conditions.
While wafer butterfly valves can handle a range of pressures, their suitability for high-pressure applications depends on their design and material. It's important to check the manufacturer's specifications for pressure ratings.
Operations, Maintenance & Storage
TTV butterfly valves offer reliable and efficient flow control solutions for a wide range of applications, from fluid to gas services. To ensure optimal performance and longevity, proper operations, maintenance, installation, and storage practices are essential.
Operating TTV butterfly valves within the specified limits is crucial. Exceeding temperature and pressure ratings can lead to damage of internal and external sealings or castings. Always verify the open and closed direction when mounting pneumatic or electric actuators, ensuring proper valve positioning. TTV wafer butterfly valves require minimal maintenance, however periodic cleaning is recommended. Dismantling any part of the valve while it is installed or operational in the pipeline, especially when fluid is present, is strictly prohibited and may void warranty or cause harm to the operator.
Prioritise careful installation to prevent damage during this process. Ensure adequate space is available for valve placement and follow a cross triangular tightening method for nuts. This will allow uniform tightening without deformation of the valve liners. During extended storage periods, maintain a controlled environment with temperatures not exceeding 25°C and low humidity to avoid condensation. Protect the valves from direct sunlight and contact with corrosive substances. Avoid deformation and store away from materials such as copper or manganese, solvents, grease, oil, and dusty materials. Correct operations, maintenance, installation, and storage are paramount to ensuring the longevity and efficiency of the performance of TTV lugged butterfly valves.
