Laminar Pte Ltd Singapore

Laminar Pte Ltd

Control Valves

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At Laminar, we provide automatic control valves for commercial and industrial applications for fluid pressure, air pressure, and more :

Specifications

Operating Functions

  • Control (modulating)
  • On/Off (in some cases)

Media to be Controlled (liquid / gas / steam / mixture)

  • Density
  • Temperature
  • Chemical composition (if corrosive)

Pressure Drop

  • Pressure drop across the valve
  • Operating pressure in the system

Flow

  • Minimum flow to be controlled
  • Normal operating flow
  • Maximum flow

Control Valves

An automatic control valve regulates the flow or the pressure (or both) of a fluid in a pipeline system. Automatic control valves consist of a main valve (usually in a globe valve design) and a self-actuated pilot valve. The self-actuated pilot valve controls the opening and closing of the main valve in response to the pressure condition in the pilot valve piping system.

Automatic control valves do not need an external power source as the fluid’s pressure is sufficient for operating the control valve via the pilot valve. The pilot valve represents a spring-loaded pressure relief valve that controls the main valve by discharge fluid. Control devices, such as solenoid valves, electric actuators, pneumatic actuators, or hydraulic actuators, can replace the pilot valve.

Some of the purposes for using automatic control valves are to protect pipes and pumps from pressure surges, prevent transients, dissipate excess energy, mitigate the risk of cavitation, control liquid levels, and perform other crucial functions.

It is a very important component of any hydraulic system. Automatic control valves usually respond to signals generated by independent instruments such as flow meters, temperature sensors or pressure gauges, or other devices.

Many types of automatic control valves have been produced over the years across a variety of industries. The design and operational features of automatic control valves may be summarised as follows:The design of an automatic control valve depends on these specific requirements.

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Pressure Reducing Valve

Laminar’s diaphragm-type control valves for pressure-reducing applications (PRV) provide precise regulation and reliable performance, ensuring optimal pressure management.
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Pressure Relief & Sustaining Valve

Pressure relief valves are critical for keeping hydraulic systems safe and efficient. They are specially designed to shield the system
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Altitude Pilot Control Valve

Altitude pilot control valves are essential for managing water levels in various applications, such as reservoirs, ground storage tanks, towers and water systems
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Float Valve

Float valves are an integral part of any water system, ensuring that the correct amount of water is always available, thereby water levels.
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Solenoid Control Valve

Solenoid control valves have become indispensable components in a variety of applications, providing a reliable and efficient method

FAQ's

The term control valve refers more to the function than the style of the valve. It can refer to any valve that regulates a system’s steady-state flow rate or pressure.

The control valve serves the purpose of regulating the fluid’s flow capacity or upstream/ downstream pressure.

It is an essential control loop component, as it is responsible for performing physical work and directly impacting the process. It is often referred to as the ‘final control element.’

Of more interest are control valves used to control the fluid flow without creating undesirable transients, excess cavitation, or head loss, and they can function under all expected flow conditions.

The method for determining flow passage size applies to all mediums, regardless of whether they are pneumatic, hydraulic, or electrical.

There are many types of valves available, each with its advantages. The design of a particular control valve depends upon the specific system requirements and the need to provide a suitable solution. Control valves can be grouped into two main categories:

Valves that control the flowing volume by a reciprocating linear motion of a valve plug attached to a stem:

  • Globe valves (e.g. hydraulic-automatic diaphragm control valves)
  • Cage trim valves (e.g. plunger or needle valves, and they are sometimes called Axial Control Valves due to their structure)

Valves that control the flowing volume through a rotating disk or sphere (rotary motion):

  • Butterfly valves
  • Plug valves
  • Ball valves
  • Gate valves
  1. Precise Pressure Control: Automatic control valves maintain desired pressure levels in pipeline hydraulic systems, ensuring safety and efficiency.
  2. Reliable Performance: These valves constantly monitor and adjust pressure levels without manual intervention, reducing the risk of malfunctions and operator errors.
  3. Flexibility and Convenience: Automatic control valves can be programmed to regulate flow rate, pressure, temperature, and chemical composition, meeting specific requirements and integrating seamlessly into existing infrastructure.
  4. Consistent Operation: With their automatic functionality, these valves deliver reliable and consistent performance over time, minimizing downtime and optimizing system efficiency.
  5. Ease of Maintenance and Installation: Automated control valves are designed for easy installation and maintenance, contributing to cost-effective operations and reducing disruptions to production.

Automatic control valves have multiple flow control applications in a range of industries. They are used to maintain the pressure, flow of fluid, temperature, and chemical composition of hydraulic systems.

These valves can be applied in oil and gas production, allowing for precise pressure control and flow and quick responses to changing conditions.

In manufacturing facilities, they are indispensable for accurately controlling process temperatures and pressures.

Furthermore, automatic control valves (pilot-operated diaphragm control valves) are often used in water distribution networks and water treatment plants, where they help regulate water distribution systems and are best to withstand water pressure, ensuring uninterrupted water service.

The application possibilities also go beyond these examples; cooling systems, HVAC, firefighting piping, automotive and industrial manufacturing, power plants, pipelines, and food processing rely on automatic control valves for their efficiency and safety benefits.

Whether it’s controlling pressure levels or maintaining the temperature of a system, these automatic control valves are essential in ensuring optimal performance in hydraulic systems.

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