Control Valve
Control Valve is a power-operated device that regulates fluid flow, pressure, level, or temperature by modulating the flow area based on control signals. Available in Globe, Angle, Rotary, and Cage-Guided configurations, it is engineered for precise process automation and reliable throttling in demanding industrial applications. Designed in accordance with IEC 60534 (terminology, inherent flow characteristics, rangeability, and standardised control-valve datasheet framework) with pressure-temperature ratings per ASME B16.34.
Introduction
A control valve is a power-operated device that automatically regulates fluid flow, pressure, temperature, or level by modulating the flow area based on a control signal. It forms the final control element of a process control loop, ensuring process stability and product quality across industrial plants.
Key Features
- Globe, Angle, Rotary, or Cage-Guided body configurations.
- Pneumatic, electric, hydraulic, or electro-hydraulic operation.
- Diaphragm, piston, or electric actuator options.
- Trim available in SS, Stellite, Tungsten Carbide, or Hardened Alloy.
- Metal seat or soft seat options.
- Flow characteristics: Linear, Equal Percentage, or Quick Opening.
- Designed to IEC 60534 / ANSI / ISA with ASME B16.34 ratings.
- Flanged, butt weld, socket weld, or threaded end connections.
Technical Specifications
| Design Feature | Standard Parameters / Range Options |
|---|---|
| Nominal Size Range | DN 25 mm to DN 1000 mm |
| Manufacturing Standards | IEC 60534, ANSI, ISA, ASME B16.34 |
| Material of Construction (MOC) |
|
| Pressure Ratings | PN 10 / PN 16 / PN 25 / PN 40 / PN 63 / PN 100 / Class 150# / Class 300# / Class 600# / Class 900# / Class 1500# |
| Modes of Operation | Pneumatic, Electric, Hydraulic, Electro-Hydraulic |
| End Connections | Flanged / Butt Weld / Socket Weld / Threaded |
| Application Media | Flow / Pressure / Level / Temperature Control in process pipelines and industrial plants. |
Application & Usage of Control Valve
Flow Control
Regulates process flow rates in oil & gas, chemical, petrochemical, and power generation plants, maintaining setpoint flow despite changing upstream conditions.
Pressure Control
Maintains constant downstream pressure in steam, gas, and liquid systems by throttling the flow, protecting equipment from overpressure and pressure excursions.
Temperature Control
Modulates the flow of heating or cooling media through heat exchangers, condensers, and HVAC circuits to hold process temperatures within tight limits.
Level Control
Controls liquid level in tanks, drums, separators, and boiler feedwater systems by adjusting inlet or outlet flow proportionally to level deviations.
Blending / Proportioning
Mixes two or more process streams in exact ratios for dosing, blending, and ratio control applications in continuous processes.
Types of Control Valves
Globe Control Valve
Linear-motion valve with a plug and seat arrangement, providing precise throttling and tight shut-off. The most widely used body style for modulating control.
Angle Control Valve
A globe-type body with inlet and outlet at right angles, suited for high-pressure drops, erosive fluids, and compact installations.
Rotary Control Valve
Quarter-turn ball or butterfly based designs offering high capacity, low leakage, and cost-effective control for large diameter services.
Cage-Guided Control Valve
Uses a guiding cage around the plug to stabilize trim, reduce vibration and noise, and lower cavitation risk in severe service.
Certificates & Inspection
All valves are subjected to rigorous hydrostatic shell and seat pressure testing in accordance with standard codes (e.g., API 598 / IS 14846) prior to delivery.
- Physical dimension and wall-thickness checks
- Hydrostatic seat and shell test validation
- Manufacturer Test Certificate (MTC) and third-party inspection (SGS, TUV, RINA, IRS etc.) available
- Epoxy powder coating inspection (DFT test)
Quality Assurance
GM Dalui & Sons Pvt. Ltd. is an ISO 9001:2015 certified manufacturer. Our commitment to safety, reliable sealing, and long service life is backed by rigorous material inspection, ultrasonic wall thickness checks, and design calculations.
We customize flow control systems to meet specific requirements for municipal waterworks, agricultural pumping wells, chemical distribution loops, and thermal power plant grids.