Overview of Control Valves

Control valves are essential components in many industrial processes for controlling the movement of fluids. They adjust the fluid’s pressure, temperature, flow rate, and level according to the process requirements.

Purpose of Control Valves

• Flow control: Control valves regulate the flow rate of fluid, ensuring consistency with the set parameters.
• Process control: These valves help in managing other variables like temperature and pressure, keeping the process within desired limits.

Advantages

• Minimal maintenance and durability.
• Resistant to clogging, ensuring uninterrupted fluid flow.
• Supports businesses in meeting ecological standards by reducing resource wastage.
• Reduces process variability, leading to strategic advantages and financial benefits.
• Assists in water conservation when used in faucets and industrial processes.

Industries

• Gas and oil production
• Power generation
• Petrochemicals
• Steel manufacturing
• Water treatment
• Paper and pulp industry

Types of Control Valves

• Three-way control valve
• Cage-type control valve
• Double seat control valve
• O type shutoff control valve
• Single seat control valve
• Water control valve
• Globe control valve
• Angle type control valve

Key Components

• Body or Shell: Provides structural integrity and withstands process conditions.
• Bonnet: Acts as a cover for internal parts and ensures thermal insulation.
• Trim: The internal parts like valve plug, seat, and portions that interact with fluid.
• Stem: Connects the actuator to the valve plug, providing control over fluid flow.
• Yoke Nut and Yoke: Provide support and maintain stem stability during operations.
• Actuator: The mechanism that opens, closes, or modulates the valve based on control signals.
• Packing: Sealing device to prevent fluid leakage.

Specifications

Available Materials: Ductile Iron, Cast Iron, Stainless Steel (SS316, SS304), Super Duplex (F51, F53, F55).

Class: 150 to 2500

Nominal Pressure: PN10 to PN450

Medium: Air, Water, Chemicals, Steam, Oil

Size: 1/2” - 24”

Ends: Flanged, Butt Weld, Socket Weld, Threaded

Actuator Details

• Electric Actuator: Torque: 3-9 Nm, Operating Pressure: 8 Bar, Port Connection: NPT 1/4", Mounting Base: ISO 5211, Temperature Range: -20°C to +80°C
• Pneumatic Actuator Configuration: 4-20 mA, Single Acting, Double Acting, Rotary, Scotch and Yoke, Pressure: Up to 228 bar

Temperature Ranges

• Standard: -4°F to 200°F (-20°C to 93°C)
• Low: -40°F to 176°F (-40°C to 80°C)
• High: 0°F to 300°F (-18°C to 149°C)

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