Control valve: types and recommendations

In the management of hydraulic and pneumatic systems, control valves play a crucial role in ensuring process efficiency, safety and precise regulation.

In this article, we will explore the different types of control valves available on the market, outline their main industrial applications, and present our expert recommendations based on Valfonta’s extensive experience in fluid control solutions.
We will also highlight our advanced control valve with pneumatic actuator, an optimal choice for applications requiring high reliability and accuracy.

Table of contents

A control valve is a mechanical device designed to regulate the flow of fluids — whether liquids, gases or steam — within a piping system.
It allows key process parameters such as flow rate, pressure and temperature to be adjusted dynamically in response to system conditions.

Its operation is based on modifying the opening of the flow passage through a movable element, which can be a disc, a ball, a diaphragm or a plug, among others.

Control valves are essential in industrial sectors where rapid, precise and safe responses to changing conditions are critical, such as:

Globe valves are recognised for their robust design and high precision in regulating flow.
The movable plug seats onto a fixed orifice, allowing fine adjustments of the fluid passing through.

Advantages:

• Precise control across a wide flow range.
• High resistance to pressure and temperature extremes.

Applications:
Chemical industry, refineries, high-pressure steam processes.

Compact and lightweight in design, butterfly valves use a rotating disc to regulate fluid passage.

Advantages:

• Quick and simple operation.
  Low installation and maintenance costs.

Applications:
HVAC systems, water treatment plants, large-diameter piping systems.

Ball valves provide excellent sealing and rapid operation. Their mechanism involves a perforated sphere that rotates to open or close the flow path.

Advantages:

• Excellent tightness and sealing.
• Minimal pressure drop across the valve.

Applications:
Oil and gas industry, high-pressure systems, industrial fluid distribution networks.

Diaphragm valves use a flexible membrane that deforms to regulate flow.
They are ideal for applications requiring leak-free operation and high purity levels.

Advantages:

• Complete isolation between the fluid and the internal mechanisms.
• High resistance to corrosive fluids.

Applications:
Pharmaceutical industry, food processing, handling of aggressive fluids.

Needle valves are designed to deliver exceptionally fine control over small flow rates, making them critical for meticulous processes.

Advantages:

• Ultra-precise flow control.
• Ideal for low-pressure applications.

Applications:
Laboratories, dosing systems, industrial instrumentation.

These valves enable the diversion or mixing of flows in two different directions, offering flexibility in system design.

Advantages:

• Simplify fluid mixing or redirection.
• Compact and efficient operation.

Applications:
Climate control systems, industrial heating and cooling circuits.

Related articles:

Some of our most demanded valves:

Choosing the right control valve is crucial to ensuring the efficiency, safety and durability of any fluid system. Below, we outline the key factors that must be considered:

Among the most advanced solutions in our catalogue is the C1 model pneumatic control valve.

Key technical features

• Globe valve body with optimised flow regulation design.
• Guided plug for enhanced stability and wear resistance​manual-C1-13B-ESP.
• Available for on/off or modulating service, depending on the configuration.
• Multi-spring pneumatic actuator with optional electro-pneumatic positioner (4-20 mA)​manual-C1-13B-ESP.
• Certifications: CE PED 2014/68/EU, ATEX zones 1 and 21​manual-C1-13B-ESP.

Materials available: Ductile iron GJS-400-18, Carbon steel GP240GHN, Stainless steel AISI 316​manual-C1-13B-ESP.

Our extensive experience enables us to offer valves tailored to each specific process, ensuring maximum efficiency, safety and compliance with international standards.