Semi Lug Type Butterfly Valve
Product Overview:
The Semi Lug Type Butterfly Valve is designed for efficient flow control in various industrial applications. It combines the benefits of a lug-style connection with a more streamlined design. This valve offers both soft and hard sealing options. It is versatile for different media and operating conditions. Its robust construction ensures reliable performance, even in demanding environments.
Design Standards:
– API 609: The valve is designed according to API 609 standards. This standard specifies requirements for butterfly valves used in general industrial applications. It ensures that the valve meets high-performance criteria.
– ASME B16.34: This standard covers pressure-temperature ratings, materials, and design criteria for valves. It guarantees that the valve can withstand the required pressure and temperature ranges in various industrial settings.
– ISO 5752: The valve complies with ISO 5752. This standard defines the face-to-face dimensions of butterfly valves. It ensures compatibility with international piping systems.
Semi Lug Connection Method:
– Advantages:
– Cost-Effective: The semi lug design uses fewer bolts than a full lug valve. This reduces material costs and installation time.
– Flexibility: It allows for easier removal and maintenance of the valve. The valve can be removed from the pipeline without disturbing the upstream side.
– Partial System Isolation: Semi lug valves can isolate one side of the pipeline. However, this is not as effective as full lug valves. It is useful for maintenance and repairs without shutting down the entire system.
– Disadvantages:
– Limited Pressure Handling: The semi lug design may not be as strong as a full lug connection. It might be less suitable for high-pressure applications.
– Potential for Leakage: The valve may have a higher risk of leakage in some applications. This is due to the fact that it is not fully bolted on both sides.
Sealing Options:
– Soft Seal: The valve can be equipped with a soft seal. This is typically made from materials like EPDM or PTFE. Soft seals are ideal for applications involving water, air, and mild chemicals. They provide excellent sealing performance in low to medium pressure and temperature conditions.
– Hard Seal: For more demanding applications, the valve can be fitted with a hard seal. This is usually made of metal. Hard seals provide better resistance to high pressure, high temperature, and aggressive media. They are suitable for applications involving steam, hot gases, and other harsh conditions.
Media and Operating Conditions:
– Compatible Media: The semi lug butterfly valve is suitable for a wide range of media. This includes water, air, steam, gases, and various chemicals. The choice between soft and hard seals should be based on the specific media and operating conditions.
– Operating Conditions: The valve is designed for moderate to high-pressure conditions, depending on the seal type. It is suitable for environments where durability and reliable sealing are critical.
Summary:
The Semi Lug Type Butterfly Valve is a versatile and cost-effective solution for industrial flow control. It is designed according to standards like API 609, ASME B16.34, and ISO 5752. These standards ensure reliability and compatibility with various piping systems. The semi lug connection method provides flexibility in installation and maintenance. However, it may be less suited for high-pressure applications compared to full lug valves. With both soft and hard sealing options available, the valve can meet the specific needs of different media and operating conditions. It delivers dependable performance and ease of maintenance for applications such as water treatment, chemical processing, and general industrial use.
