A double union ball valve is an industrial pipeline control device that switches fluid flow through a double union L-shaped floating tee structure. It features a split structure for simultaneous control of the opening/closing status of two ball valves. Its core design includes full bore/reduced bore structure, static electricity prevention device, fire-resistant seal, and anti-piercing mechanism for the valve stem. It meets international standards such as API 6D, with nominal pressure ranging from 1.6 MPa to 4.0 MPa.

Key Features

Structure Characteristics: Split design, materials include WCB cast steel, stainless steel, etc., with sealing parts made of polytetrafluoroethylene composite materials, suitable for operating temperatures ranging from -20℃ to 250℃.

‌Function Design: Synchronize control of two ball valves through a single handle or worm gear mechanism, ensuring that one valve opens while the other closes, reducing leak points and simplifying the operational process.‌

Safety Design: Includes antistatic structure (achieved through conductive springs for static discharge), fire-resistant sealing (forming a metal-to-metal hard seal during a fire), and valve stem anti-extrusion mechanism.

Application Scenarios

Primarily used in oil, chemical, gas, and water treatment industries, it replaces traditional complex pipeline connections and is suitable for special scenarios such as gas and corrosive media. It can reduce maintenance costs and enhance safety.