Cage-type Dual-Seat Control Valve

Category: Cage Type Regulating Valve

Summary:

+86-028-61030291

Product Details

　　Overview

　　The valve features an advanced and well-designed structure, with seamlessly integrated curved flow passages that minimize flow resistance while maintaining exceptional throughput capacity. It consists of components such as the valve body, valve bonnet, valve plug, sleeve, stem, and packing gland.

　　The valve plug is guided by a sleeve and features automatic centering. With its large guiding area, the valve plug boasts excellent vibration resistance, ensuring smooth operation and high adjustment accuracy.

　　The sleeve is securely fixed inside the valve chamber using a compression-type mechanism, making assembly and disassembly simple and maintenance convenient.

　　The unique cage design is suitable for demanding operating conditions such as flash and cavitation, and also ideal for controlling clean fluids under significant pressure differentials.

　　 Structural Form

　　Major Components and Supporting Materials

Valve	Components	Structural Type	Material package	Note
	Valve body	Straight-through single-seat spherical body	Carbon steel, stainless steel, alloy steel	Casting, forging, welding
	Valve core	Piston-type	Stainless steel, special alloy steel	Special requirement: Surfacing welding or spray coating treatment
	Valve seat	Sleeve-type	Stainless steel, special alloy steel	Special requirement: Surfacing welding or spray coating treatment
	Upper Valve Cover	Room-temperature, elongation-type heat dissipation, metal bellows type	Carbon steel, stainless steel	The amount of elongation varies depending on the temperature.
	Filler	V-shaped, O-shaped	PTFE, Flexible Graphite
	Sealing gasket	Serrated, sealed envelope ring	Stainless steel, special alloy steel, flexible graphite
Executive Agency	Pneumatic diaphragm multi-spring type, cylinder		Spring range (kPa): 20–100, 40–200, 80–240, 120–240
	Pneumatic diaphragm multi-spring type, cylinder		Input signal (kPa): 150–400; Positioner 4–20 mA DC, 1–5 V
	Entirely electronic models 3610L, 3810L, and the PS series		Input signal 4–20 mA.DC, wiring 2-1/2 NPT

　　 Features

　　The valve core is designed based on the force-balancing principle, featuring small unbalanced forces and excellent dynamic stability. The sealing assembly adopts a double-seat design. This valve is suitable for applications where there is a significant pressure difference between the valve's upstream and downstream sides, and where leakage requirements are not particularly stringent.

　　Nominal diameter: DN20–DN400 mm

　　Nominal pressure: PN 1.6–6.4 MPa, ANSI 150–600

　　Flow characteristics: Linear, equal percentage, quick-opening

　　Flow coefficient: Cv 6.3–4000

　　Leakage Level: Class III

　　Adjustable ratio R: 50:1

　　Connection Type: Flange Type

　　Operating temperature: -196°C to +560°C

Keywords: Cage-type Dual-Seat Control Valve

Previous: Balanced Cage Single-Seat Control Valve

Next: No!