Pneumatic U-Type Butterfly Valve

The Pneumatic U-Type Butterfly Valve is an economical and versatile flow control device that integrates the structurally optimized U-Type body design with fast, reliable pneumatic actuation. It is specifically engineered for simple isolation and on/off service in pipelines handling corrosive media, water, gas, and dry materials like feed/grain.

Key Structural and Performance Advantages

Simple Structure & Economical: The design is simple, has excellent versatility and interchangeability of parts, and offers a low price point compared to more complex control valves.
Two-Piece Stem: The valve stem uses a two-piece, pin-less connection, resulting in a compact structure that is extremely easy to disassemble and maintain.
Enhanced Stem Sealing: The valve stem sealing is designed to resist deformation, effectively preventing the common issue of stem leakage and ensuring overall structural stability and rigidity.
Optimized Sealing Design:
- Reduced Rubber: Uses minimal rubber in the seat structure, lessening the potential impact of material expansion and keeping the required operating torque within a manageable range.
- Phenolic Backing Seat : The seat features a phenolic backing, which prevents detachment, resists pulling, and reduces seat deformation, facilitating easy replacement and ensuring reliable sealing.
Automatic Centering: The U-Type geometry provides an automatic centering function, ensuring precise, minimal interference engagement between the disc and the seat.

Technical Specifications

Parameter	Specification	Notes
Nominal Diameter (DN)	DN50 to DN300	Available for common pipe sizes.
Actuation	Pneumatic, Electric, Manual,Worm Gear	Pneumatic is the focus, providing fast, reliable automated control.
Working Pressure (PN)	PN0.2, PN1.0, PN1.6	Suitable for low to medium-pressure applications.
Working Temperature	$-15^\circ\text{C}$ to $85^\circ\text{C}$ $-15^\circ\text{C}$ to $150^\circ\text{C}$	Temperature range depends on the seal material selected.
Body Material	Ductile Iron	Provides durability and strength at an economical cost.
Sealing Material	PTFE (Polytetrafluoroethylene), EPDM (Ethylene Propylene Diene Monomer)	PTFE is preferred for chemical/corrosive media; EPDM is standard for water/general service.
Applicable Media	Strong Acids, Strong Alkalis, Feed/Grain, Water, Gas	Wide chemical compatibility based on the seal choice.
Application Fields	Water, Gas, Feed/Grain Processing	Versatile use in general utilities and bulk dry goods transfer.