Control Valves

Overview

Flow with Confidence: Reliable and Efficient Control Valves for Every Flow Challenge

Motorised Control Valve

Flow control is the heart of any industry, and control valves play a pivotal role in maintaining the desired parameters of a process. At their core, control valves manage the rate of fluid flow by adjusting the size of the internal flow passage. Control valves utilise an actuator, triggered by a signal, to modulate the flow path and precisely regulate the fluid stream.

Control Valves help to:

Regulate Flow: Flow control valves ensure that every process receives the precise amount of flow it needs.
Manage Pressure: Pressure Control Valves ensure that all downstream equipment operates at the right pressures and keep the pressure in check, safeguarding equipment and personnel.
Govern Temperature: Precise flow regulation translates to controlled temperature fluctuations. Temperature Control Valves prevent overheating in a manufacturing process or maintain the delicate balance in a chemical reactor.
Maintain Level: From ensuring consistent liquid levels in storage tanks to regulating the water level in a boiler, Level Control Valves keep liquids and gases flowing at the right depth.

At IndiTech, we’re more than just a valve manufacturer; we’re your trusted partner in flow control. We offer a diverse portfolio of solutions, each tailor-made to meet the unique needs of your industry. From expert valve selection and installation to ongoing maintenance and technical support, we’re with you every step of the way.

Maximize process efficiency with our high-performance control valves.

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Applications

100% & 30% Feed Water Control Valve:

Feed control valves are essential for ensuring a steady and reliable supply of feedwater to the boiler. The 100% feed control valve is used during high-load periods, whereas the 30% valve is used at partial-loads offering finer control over the feed water flow.

Start-up Vent Valve:

The Start-up Vent Valve in boilers is a severe service application that helps in venting the steam from the system during the plant start-up phase.

Attemperator Control Valve:

The Attemperator Control Valve in boilers plays a critical role in regulating the temperature of the final superheated steam by injecting water into it.

Auto Gland Seal Control Valve:

An Auto Gland Seal Control Valve automatically regulates the pressure of sealing steam around a turbine shaft, preventing air leaks and minimising steam loss. It essentially maintains a balanced “barrier” preventing external air from entering the turbine while allowing controlled leakage of sealing steam outwards.

Condensate Pump Recirculation Valve:

Condensate Pump Recirculation Valve Maintains optimal flow and prevents cavitation by recirculating excess condensate back to the suction of the condensate pump.

Exhaust Casing Drain Valve:

The Exhaust Casing Drain Valve drains away condensate from the turbine & maintains pressure balance.

Boiler Feed Pump Recirculation Valve:

The boiler feed pump recirculation valve regulates the bypass flow from the pump outlet back to the deaerator. This bypass flow prevents overheating and cavitation of the pump.

Deaerator Level & Pressure Control Valve:

The Deaerator Level & Pressure Control Valve maintains optimal water levels and pressure within the deaerator, ensuring efficient removal of dissolved gases such as oxygen from the boiler system.

Soot Blower Control Valve:

A soot blower control valve regulates the release of steam to remove accumulated soot and ash from the interior walls of the boiler heating surfaces.

Hotwell Level Control Valve:

The Hotwell Level Control Valve in a steam turbine system helps to manage the water level in the condensate hotwell. This tank collects condensed steam from the turbine exhaust, and maintaining its level is crucial for efficient and safe operation.

Exhaust Hood Spray Valve:

The Exhaust Hood Spray Valve sprays water into the turbine exhaust hood, thereby preventing overheating & optimising performance.

Vacuum Breaker Valve:

The Vacuum Breaker Valve acts as a safety valve for the turbine’s vacuum, letting in air to prevent implosion due to sudden loss of vacuum in the condenser & for quick shutdown during emergencies.

Technical Data

INDITECH SERIES

210

VALVE SIZE

NPS 0.5 to NPS 24 (DN15 to DN600)

PRESSURE RATING

CL150 to CL2500

DESIGN STANDARD

ASME B16.34; ISA 75.01.01

END CONNECTIONS

Flanged/Socket Weld/Butt Weld

BODY MATERIAL

A216 WCB; A217 WC6/WC9/C12A; A351 CF8/CF8M

CHARACTERISTICS

Linear/Modified Linear/Equal %/
Modified Equal %/On-Off

LEAKAGE CLASS (FCI 70.2)

Class IV/Class V/Class VI

OPERATION

Pneumatic/Motorised/
Manual

ACCESSORIES

Positioner (Pneumatic/Electro-pneumatic/ SMART)
Air Filter Regulator
Position Transmitter
Air Lock Relay
Limit Switch
Solenoid Valve
Volume Booster

Features & Benefits

Streamlined body profile with excellent flow capacity and rangeability
Wide range of trim options with customised flow characteristics in both balanced and unbalanced designs
Soft-seated/Hard-faced sealing surface options available
Roller-burnished valve stem offers minimal friction
Reliable leakage performance with sealing as per Class IV, Class V, Class VI available
High-performance PTFE/Graphite stem sealing
Various bonnet types, from Standard Bolted, Cooling Fin to Pressure Seal Bonnet available

FAQ

What is the difference between a control valve and a regulator ?

They both manage flow; however, they do so very differently. A control valve is operated with an external control system, like a PLC or DCS, which feeds the valve with a signal saying how much to open or close to keep process targets like temperature, flow, or liquid level. A regulator, in contrast, is entirely self-contained. It also detects downstream pressure directly and automatically adjusts itself to maintain that pressure constant without the need for any electronic or pneumatic control command.

What are the signs of an oversized or undersized control valve?

A large valve will operate at a position of very small opening, frequently less than 20 percent, which stabilizes control poorly, causes the valve to hunt around the setpoint, and hastens seat wear. The related issue of an undersized valve is that it cannot attain the required maximum flow when wide open, resulting in restrictions that inhibit or reduce the speed of the process

What materials are best for corrosive chemical applications?

The type of the chemical, temperature, and hydrostatic pressure determine the right decision. SS316 and SS316L have a wide application with respect to most corrosive fluids. On more active materials, more-reactive alloys like Hastelloy or Monel can offer additional protection against corrosion, increasing service life and increasing safety.

What is the function of a valve positioner in a pneumatic control valve?

A positioner makes the actual position of the valve stem agree with the command signal. It continuously compares the aim point with the stem’s position and then adjusts the air stiffness to the actuator, eliminating any errors. This then enables the free and precise movement possible even with friction or other mechanical opposition.

How does IndiTech Valves ensure the quality and reliability of its control valves?

We begin with high-end CFD modeling, then find certified materials, stringent in-process quality controls, and end testing to global standards such as API 598. Our high quality and reliability are proven by such certifications as ISO 9001:2015 and our CRISIL SME 1 rating.

Can IndiTech Valves provide a replacement for an older, imported control valve model?

Absolutely. We excel in the practice of developing replacements for outdated or difficult-to-procure ones. Through analysis of your existing system, we create a customised valve that works as well as the original or better, yet at a cost-effective price throughout the life of the valve. Contact us for more details!