API 609 Double Offset Butterfly Valve

The API 609 Double Offset Butterfly Valve is a high-performance, double-offset butterfly valve compliant with the API 609 standard. Suitable for Class 150–300LB / PN6–PN63 pipelines, it is designed for the shut-off and regulation of water, oil, gas, and corrosive media.

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Product Introduction

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Class 150 Triple Offset Butterfly Valve Overview

Specifications

Pressure Rating	Class 150LB ~ 300LB / PN6 ~ PN63
Size Range	DN50 ~ DN1200
Body Material	Ductile Iron, Aluminium Bronze, Carbon Steel, Stainless Steel, Monel, Alloy 20, etc.
End Connection	Wafer Type, Lug Type, Double Flange Type
Operation	Gearbox, Lever Handle, Pneumatic Actuator, etc.
Face-to-Face Dimension	API 609 / ISO Standard
Test and Inspection	API 598 / ISO 5208

Class 150 Triple Offset Butterfly Valve Material Specification

The valve body is available in a selection of materials-including ductile iron, carbon steel, stainless steel, aluminum bronze, Monel, and Alloy 20-to meet diverse requirements regarding corrosion resistance and pressure ratings. The valve disc and sealing surfaces feature a combination of corrosion-resistant and wear-resistant materials, offering high-temperature endurance and resistance to erosion to ensure long-term sealing stability.

Class 150 Triple Offset Butterfly Valve Applications

Oil & Gas: Fluid shut-off and control in pipeline and station systems.

Chemical Industry: Safety control for pipelines conveying corrosive media.

Power Systems: Flow regulation in circulating water and cooling water systems.

Water Treatment: Control of municipal water supply and sewage treatment networks.

Marine & Offshore: Applications in seawater systems and pipelines within highly corrosive environments.

Factory Production Capability for Class 150 Triple Offset Butterfly Valve

Production Facilities: CNC Machining Centers + Precision Casting Lines + Automated Assembly Lines.

Process Capabilities: Precision Casting / Sand Casting + CNC Machining + Anti-corrosion Coating Treatment.

Production & Delivery: Supports mass production for sizes DN50–DN1200; standard lead time is 7–30 days.

Customization Capabilities: Supports customization of pressure ratings, connection types, materials, actuators, and OEM branding.

Quality Control: Compliant with API 598 / ISO 5208 standards; 100% pressure and seal testing performed prior to shipment.

FAQ

Q: What advantages do API 609 double-eccentric butterfly valves offer compared to standard butterfly valves?

A: The double-eccentric structure reduces sealing friction, resulting in lower operating torque and more stable sealing performance. This makes them suitable for medium-to-high pressure applications and long-term continuous service conditions.

Q: What is the maximum pressure rating supported?

A: They comply with Class 150–300LB / PN6–PN63 standards; specific models can be selected or customized based on the project's specific operating conditions.

Q: Can these valves be used with high-temperature or corrosive media?

A: Yes. By utilizing materials such as stainless steel, Monel, or Alloy 20-combined with PTFE or metal sealing components-these valves are suitable for use with high-temperature and highly corrosive media.

Q: What is the Minimum Order Quantity (MOQ)?

A: We welcome small-batch trial orders and are also fully equipped to fulfill large-volume wholesale orders.

Q: What is the typical lead time for delivery?

A: For standard specifications, delivery typically takes between 7 and 30 days, depending on the order quantity and specific customization requirements.

Q: Do you offer customization services? What aspects can be customized?

A: Yes, we support OEM/ODM services. Customizable options include pressure ratings, materials, connection types (Wafer, Lug, or Double Flange), actuators, and brand markings.

Q: What inspections are conducted prior to shipment?

A: We strictly adhere to API 598 and ISO 5208 standards, performing 100% pressure testing and leak testing on every unit to ensure consistent, reliable quality upon shipment.

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