Lugged Type Butterfly Valve, ASTM B148 C95800, 16 IN, 150 LB

Product Name: Lugged Type Butterfly Valve
Type: Double Offset Butterfly Valve
Body Material: ASTM B148 C95800
Size: 16 Inch, DN400, 400 mm
Pressure: Class 150 LB, PN20
Operation: Gear
Medium: Sea Water
Temperature Range: -29°C to 150°C

The lug-type double offset butterfly valve in bronze is a versatile and durable solution for a wide range of applications. Its bi-directional design and blowout-proof shaft ensure reliable performance even under extreme conditions. The valve can be customized with soft, metal, or fire-safe seats to meet specific customer requirements, offering enhanced functionality and adaptability across diverse industries. With its robust construction and configurable features, this flanged high-performance butterfly valve in bronze provides dependable flow control and is widely used across industrial sectors.

Technical Specification

» Size Range:
  Class 150 LB: 2-60 Inch
  Class 300 LB: 2-48 Inch
  Class 600 LB: 2-24 Inch
» Pressure Rating: Class 150-600 LB, PN10-PN40, 10K-20K
» Design Type: Double Offset
» Standard: API 609 Category B
» Body Material: Aluminum Bronze (ASTM B148 C95800, C83600, B584 C84400, ASTM B62)
» Disc Material: Aluminum Bronze (ASTM B148 C95800, C83600, B584 C84400, ASTM B62)
» Shaft Material: MONEL K500
» Shutoff Rating: Class VI, Bubble Tight
» Certifications: API 607, PED
» Seat Design: Unique Valve Seat Design
» Optional Seat Materials: RTFE
» Operation Options: Handle, Worm Gear, Pneumatic, Electric
» Temperature Range:
  Soft Seat: -29°C to 260°C
  Metal Seat: -51°C to 550°C
  Metal Seat (Cryogenic): -196°C to 121°C
  Fire Safe Seat: -51°C to 550°C
» End Connections: Wafer, Lug, RF Flange
» Medium: Sea Water, etc. 

Application Scope

» Chemical / Petrochemical
» Liquefied Gas / Refrigeration
» Heavy Industry
» Power / Co-Generation Plants
» Steel and Iron Works
» Commercial Applications
» Pulp and Paper Mills
» Oil Refineries and Oil Fields
» Shipbuilding
» Hydrocarbon Processing / Gas Piping
» Local Area Energy Supply / Industrial
» Construction
» Marine Applications

Double Offset Butterfly Valve

The Double Offset High-Performance Butterfly Valve is a new type of butterfly valve designed by absorbing the advantages of several different structural butterfly valves. The sealing surface of the valve plate is a spherical arc surface. The sealing mechanism achieves a true dynamic seal through system pressure, thus providing reliable sealing performance and durability. It features a small volume, light weight, wide manufacturing range, and is easy to maintain and repair. Due to its double offset butterfly plate design and single-piece flexible lip-shaped sealing seat, it is ideal for applications requiring reliable sealing and good regulating characteristics. It can be used for quick shut-off or regulating flow.

Double Offset Frictionless Design

• 1st offset: Shaft is positioned downstream from the centerline of the seat.
• 2nd offset: Shaft is off center from the vertical axis of the seat.
• ISO 5211 Top Flange
• In addition to standard, durable V-ring packing, you can also choose from optional graphite
• high temperature packing or emissions control packing.
• Bi-Directional, Shut off performance
• Seat Options: Rubber, PTFE, RPTFE, or Fire Safe PTFE
• The double offset operating principle minimizes seat wear and lowers operating torque to
• improve durability.
• Positive sealing is mechanically achieved and does not rely on line pressure assistance.

Seat Structure

Double Offset PTFE Seat Butterfly Valve

• A surplus of material between the PTFE Seat and Disc ensures a reliable seal in a low pressure environment.
• In high pressure situations, the force of the medium pushes against the seat contacting the sealing surface for a stronger seal.
• The disc surface has a conical design to reduce frictional force. The valve seat can also be replaced or repaired easily.

Double Offset Fire Safe PTFE Butterfly Valve

• Fire Safe valve seat with dual seal includes a primary PTFE seat insert and metal seat. 
• In the event that the PTFE insert is destroyed, the secondary metal seat provides an effective shut-off. 

Shaft Retention

• Externally retained, double blowout proof stem design as API 609
• External: Shaft is designed with an integral collar and gland follower to prevent blowouts.

Zero Leakage

• Disc-Seat sealing is achieved by evenly loading torque force onto the disc's laminated seal

ISO 5211 Top Mounting

Different End Connections Available: