Double Flanged Butterfly Valve

Double flanged Butterfly Valves are an essential component of many industrial and commercial systems, specifically designed to regulate the flow of fluid through pipes. These versatile valves are becoming increasingly popular due to their balance of durability, reliability and cost-effectiveness when compared to more traditional ball valves.

• Multiple applications: these valves are suitable for a wide range of applications, making them a popular choice for industries such as water treatment, oil and gas, and chemical processing.

• Actuator Options: These valves can be equipped with either pneumatic or electric actuators, providing flexibility to meet a wide range of operational needs. The choice of actuator affects how the valve is controlled - pneumatic actuators for faster operation and electric actuators for more precise control.
  

• Accessory compatibility: To enhance functionality, double-flanged butterfly valves can be equipped with a variety of accessories. Options include switch boxes for operational feedback, solenoids for automatic control, air filter regulators for pressure maintenance, and 4-20mA electro-pneumatic positioners for fine-tuning valve position.
  

• Quality Assurance: Each valve is fully assembled and rigorously tested to ensure optimum performance and reliability, giving you peace of mind in critical operations.
  

APPLICATIONS

Double flanged butterfly valves are robust and adaptable and are widely used in a number of applications. They are ideally suited for:

• Water and wastewater management: efficiently controlling flow in municipal and industrial water supply systems.
  

• Petrochemical processes: managing the transport and processing of hydrocarbons and other chemicals.
  

• HVAC systems: Regulating air and fluid flow in heating, ventilation and air conditioning systems to improve energy efficiency.
  

• Mining operations: handling abrasive materials and controlling slurries in the extraction process.
  

These valves are a cost-effective solution while maintaining the high levels of performance and adaptability that make them an integral part of modern industrial applications.

Understanding Pressure Equipment Directive Compliance for Double Flanged Butterfly Valves

When it comes to double flanged butterfly valves, compliance with the Pressure Equipment Directive (PED) is crucial. The PED, identified formally as 2014/68/EU, is a set of regulations imposed by the European Union to ensure the safety of pressure equipment.

Key Requirements for Compliance:

• Scope and Application: The directive applies to equipment that operates under pressure greater than 0.5 bar. Double flanged butterfly valves, commonly used in various industries, fall under this category as they often handle pressurized fluids.

• Safety Standards: To achieve PED compliance, these valves must meet specific safety standards. This includes rigorous testing to withstand both internal pressures and external stresses, ensuring they do not leak or burst under specified conditions.
  

• Design and Manufacturing: The design of the valves must adhere to the PED guidelines. Manufacturers are required to use approved materials and techniques to fabricate valves that can meet the necessary safety thresholds.
  

• CE Marking: Double flanged butterfly valves compliant with the PED must carry the CE mark. This mark signifies that a product adheres to EU safety, health, and environmental protection requirements.
  

• Risk Assessment and Documentation: Compliance also involves a comprehensive risk assessment. Manufacturers must provide technical documentation detailing the design, manufacturing process, and testing procedures to demonstrate adherence to the directive’s standards.
  

• Third-Party Verification: In many cases, third-party agencies, such as Lloyd’s Register or TÜV, should verify compliance. These bodies perform inspections and certify that the valves meet all applicable criteria.
  

By ensuring double flanged butterfly valves are PED compliant, manufacturers and users can be confident in their safety and performance. This compliance not only enhances operational safety but also facilitates trade within the European Economic Area (EEA).

NO.	Part Name	Material	Optional Material
1	Body	DI	CI, WCB, Stainless Steel
2	Seat	NBR	EPDM, FKM
3	Disc	Plated Ductile Iron	ASTM A351 CF8/CF8M, B148 C954
4	Middle Bearing	F4	Bronze
5	Shaft	ASTM A276 416	316, 17-4PH
6	Upper Bearing	F4	Bronze
7	O Ring	NBR	EPDM, FKM
8	Pin	ASTM A276 416	316

Dimensions data(mm)