GB Wafer Type Concentric Butterfly Valve

Core Design & Performance

This valve follows the GB (Chinese National Standard) concentric (centerline) structure, engineered for bi-directional flow control with minimal pressure loss. The optimized disc and seat geometry delivers low operating torque, enabling effortless handwheel or actuator operation even at full pressure.

Key Structural Features

Anti-blowout stem design: Prevents stem ejection under high pressure, ensuring operational safety and compliance with industrial safety norms.

Shaft configuration: Dual-shaft design for sizes 2"–12" enhances stability; one-piece solid shaft for sizes 14" and above boosts rigidity in larger-diameter pipelines.

ISO 5211 top flange: Standardized mounting interface for seamless integration with pneumatic, electric, or hydraulic actuators.

Position indicator: Clearly displays open/closed status for quick visual inspection during operation and maintenance.

Sealing & Material Options

Versatile seat selection: Available in EPDM, NBR, Viton, and PTFE to suit diverse media and temperature conditions, from water and neutral fluids to corrosive chemicals and high-temperature oils.

Wafer-type body: Compact lug-style design for easy installation between pipe flanges, saving space and simplifying piping layouts.

Application Scenarios

Ideal for water supply, HVAC, chemical processing, and general industrial pipelines, where reliable bi-directional flow control, low maintenance, and long service life are required.

Basic Parameters

Standard: GB (Chinese National Standard)

Connection: Wafer (Lug)

Structure: Concentric (Centerline)

Stem: Anti-blowout, dual-shaft (2"–12") / one-piece shaft (≥14")

Seat Options: EPDM, NBR, Viton, PTFE

Actuator Mount: ISO 5211 top flange

Operation: Worm gear handwheel / automated actuators