Q644/645F Pneumatic Flanged Three-Way Ball Valve – Technical Details

Structural Features & Applications

Compact design, quick opening/closing, smooth flow path, and low fluid resistance.

Excellent sealing performance: Utilizes PTFE (Teflon) elastic deformation in the four-sided valve seat to achieve leak-proof sealing.

Versatile functionality: Any port can serve as the inlet without leakage. The three-way valve can be configured as either an L-type or T-type port.

Easy maintenance: Inspection and repair can be performed without removing the entire valve body after system depressurization.

Widely used in pipeline systems for water supply, petrochemicals, metallurgy, mining, textiles, energy, papermaking, food, and steel industries, enabling flow direction switching, diversion, or mixing of media.

Q644/645F Pneumatic Flanged Three-Way Ball Valve – Compliance Standards

Design & Manufacturing:

GB/T 12237-1989

API 608

Inspection & Testing:

GB/T 13927-1992

API 598

Flange Connection:

JB/T 79.1-1994

ASME/ANSI B16.5

Face-to-Face Dimensions:

Custom standard (JD-2002)

Flow Direction Diagram of Three-Way Ball Valve

The flanged three-way ball valve is used for flow splitting or merging, featuring two or four valve seats with multiple ports. Any port can serve as the inlet without leakage.

L-Type Three-Way Ball Valve:

Suitable for flow direction switching, connecting two perpendicular channels.

T-Type Three-Way Ball Valve:

Suitable for flow splitting, merging, or switching.

The T-shaped passage allows all three channels to interconnect or two channels to connect.

Note:

Standard models use a two-seat structure, but a four-seat design is available upon request.

This valve ensures high efficiency, reliability, and flexibility in industrial flow control applications.

技术规范

注：系列球阀结构长度及连接法兰尺寸可根据用户要求设计制造。

主要零件材质表

注：系列球阀主要零部件及密封圈的材质可根据实际工况条件或用户特殊要求设计选用。

主要外形及连接法兰尺寸 Q64（4、5）（F、N、P）-16

主要外形及连接法兰尺寸 Q64（4、5）（F、N、P）-25

注：系列球阀结构长度及连接法兰尺寸可根据用户要求设计制造。

注：数据×××，× ××分别是气动执行器双作用式，单作用式（弹簧复位）。
注：根据不同阀门扭矩、使用介质适配的执行器型号可能有所不同．相关尺寸随之变化