Three-way Confluence Control Valve

Summary:The valve core features a cylindrical design with windowed openings, paired with a single-seat valve seat. It consists of components such as the valve body, valve seat, valve core, stem, packing gland, and upper bonnet. This design boasts a compact structure, lightweight construction, sensitive operation, and precise flow characteristics. Like the sleeve in cage valves, the valve core offers two types of throttling areas: one with large windows and another featuring small holes (jet-type). The latter design effectively reduces noise and minimizes resonance. The three-way control valve incorporates two valve cores and valve seats, sharing a similar structure with the double-seat valve. In this type of valve, as the flow area between one valve core and its seat increases, the flow area between the other core and its seat simultaneously decreases—this occurs when one path is fully closed while the other is fully open.

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Product Details

Overview

　　The valve core features a cylindrical design with window openings and is combined with a single-seat valve seat. It consists of components such as the valve body, valve seat, valve core, valve stem, packing gland, and upper bonnet. This design boasts a compact structure, lightweight construction, sensitive operation, and precise flow characteristics. Like the sleeve in cage valves, the valve core comes in two types of throttling areas: one with large open windows and another with small perforations (jet-type). The latter type effectively reduces noise and minimizes resonance. The three-way control valve incorporates two valve cores and valve seats, featuring a structure similar to that of a double-seat valve. In this configuration, as the flow area between one valve core and its seat increases, the flow area between the other core and its seat decreases—resulting in a fully closed position for one path while the other remains fully open.

　　The opening and closing of the three-way control valve are achieved by selecting either the direct or reverse action of the actuator. The three-way valve effectively replaces both a fail-open valve and a fail-closed valve, thereby reducing costs and minimizing installation space.

　　The three-way control valve has three inlets and outlets connected to the pipeline, and is classified into mixing valves and diverting valves based on its function. It primarily controls or switches the proportion of media flowing in either a combined or split manner.

　　Widely used to precisely control process parameters—such as gases, liquids, and steam—to maintain them at specified values. Suitable for applications in power plants, chemical industries, petroleum, metallurgy, and other fields.

Flow characteristics and fluid direction

Valve Body Structure	Usage	Flow Characteristics	Executive Agency	Fluid direction
Three-way Confluence Control Valve	Confluence	Feature (1) A → AB Feature (2) B → AB	Positive-acting type	B → AB
			Reactive Type	A → AB
	Diversion	Property (1): AB → A Property (2): AB → B	Positive-acting type	AB → B
			Reactive Type	AB → A
Three-way Diversion Control Valve	Diversion	Feature (1) AB → B Feature (2) AB → A	Positive-acting type	AB → A
			Reactive Type	AB → B

Features

　　The pneumatic/electric three-way control valve combines two incoming fluid streams into a single outgoing flow, enabling proportional control or switching between the media flows. This type of valve features two inlets and one outlet. When DN ≤ 65, the combining valve can also be used as a分流阀 (diverting valve).

Main Technical Parameters

　　Nominal diameter: DN20–200 mm

　　Nominal pressure: PN1.6–6.4 MPa, ANSI 150–600

　　Valve body material: Carbon steel, stainless steel, special alloy steel Valve internal parts material: Stainless steel, special alloy steel

　　Flow characteristics: Linear, Equal Percentage, Quick-Opening Flow Coefficient (Cv): 5–630

　　Leakage Level: Class IV, Adjustable Ratio R: 30:1

　　Connection method: Flanged

　　Operating temperature: -29°C to +560°C

Keywords: Three-way Confluence Control Valve

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