PRESSURE INDEPENDENT CONTROL VALVES (PICV)

PICV Valve Function

The FlowCon Pressure Independent Control Valve (PIC Valve or PICV Valve) combines 3 functions in one valve: modulating control, dynamic flow limitation and differential pressure control. The Pressure Independent Control Valve is widely used in heating and cooling applications due to its accuracy and energy saving potential. The FlowCon PICV Valve Function offers 100% control authority for all flow conditions, that is with a programmable choice of either linear or equal percent control characteristic. Flow balancing of the system is automatic and independent of pressure change within the system.

The PICV Valve range includes two PIC Valve families, which are both tested to BSRIA PICV Valve standards. The Green range, which offers flexibility and serviceability through the removable PICV Valve insert up to the Green.2, and the SM range covering sizes up to 250mm.

Green PIC Valves include an innovative diaphragm-based self-adjustment feature, enabling the PIC Valve to continuously self-balance, thereby achieving precisely the flow rate required by each terminal unit, independent of pressure fluctuations in the system. In addition, each insert can be adjusted and set to an accurate maximum flow limit to each circuit without stroke limitation. As long as the pressure differential across the valve is within the operating range, the valve diaphragm is regulating nonstop ensuring constant differential pressure across the regulating element (100% authority).

SM PIC Valves keep a constant differential pressure across the internal controlling orifice of the valve. The SM valve setting will limit flow to design flow at full load. The SM actuator will accurately and with 100% authority limit the flow requirement at any partial load. The dynamic flow characteristics keep the SM PIC Valve in constant authority and automatically balanced.

The efficiency of a PICV installation with the Green or SM ranges in use can be even further improved by accurately maintaining differential temperature across a branch or terminal unit to maximise the energy saving by adding the FlowCon FIT Intelligent Interface and App to the PICV installation.

The Green and SM Pressure Independent Control Valve ranges are easy to select, set, commission and service, due their flexibility, user-friendly setting, and low minimum ΔP. The repeatability of FlowCon PICV Valves is one of the best in the market due to low hysteresis.

FlowCon’s continuous commitment to and investment in R&D has resulted in the widest range of dynamic balancing valves and the largest dynamic and PICV installation base with over 10M valves installed in over 60 countries around the globe.

PICV Valves – Pressure Independent Control Valve

PIC Valves (Pressure Independent Control Valves) offer accurate control of flow to increase energy and occupant comfort in heating & cooling systems.

Enjoy Efficiency with PICV Valves

The PICV Valves are essential components in modern HVAC systems in both commercial and residential settings. For instance, PIC Valves (Pressure Independent Control Valves) offer accurate control of flow to reduce energy consumption and increase occupant comfort in variable flow heating & cooling systems. When you are looking for a top-quality FCU PICV Valve Set, you can trust us at FlowCon.

How Do PIC Valves Work: A Complete Guide

PICV Valves are advanced control devices used in hydronic heating and cooling systems to regulate the flow of water with exceptional precision. They are engineered to deliver a stable, pre-set flow rate regardless of variations in system pressure. As a result, the valves have a wide range of applications, including:

• Commercial HVAC systems
• Industrial and district heating & cooling
• Residential & smart building solutions

Key Features of High-Quality PICV Valves

Efficiency, reliability, and performance are critical factors when it comes to PICV Valve for AHU or any hydronic system application. The following key features distinguish premium-grade Valves from FlowCon from standard offerings:

Automatic and Precise Flow Regulation

These valves self-adjust in real time to ensure that a fixed flow rate is delivered to each terminal unit—regardless of dynamic system pressures. This precise flow control by the PICV Valve for FCU is especially important in variable flow systems, where changes in demand or valve positions elsewhere in the circuit can impact overall performance. By stabilising the flow, the Valves optimise the performance of connected devices such as fan coil units (FCUs) and air handling units (AHUs), ensuring they deliver an unquestionable performance.

Unrivalled Valve Longevity

Durability is another hallmark of a high-quality PICV Valve for AHU. These valves are constructed using robust, corrosion-resistant materials, such as brass and stainless steel, to withstand the rigours of daily use in hydronic HVAC systems. They are less prone to scaling, clogging, or seal degradation, which helps maintain flow accuracy over time.

Frequently Asked Questions

What are the advantages of using these Valves in HVAC systems?

Proper PICV Valve for AHU Installation provides many benefits. The valves’ ability to maintain a consistent flow rate in HVAC systems, irrespective of pressure variations significantly simplifies system design and commissioning. The valves also ensure precise heating and cooling outputs. This leads to better temperature control, increased occupant comfort, and more predictable system behaviour.

How does a PICV Valve for FCU improve energy efficiency?

The valves ensure that each terminal unit within the HVAC system receives only the precise amount of water required for optimal thermal performance. This ensures pumps operate under optimal load conditions, minimising unnecessary energy consumption.

Can the valves help in reducing HVAC maintenance costs?

Yes, the PICV Valve for AHU Installation substantially reduces maintenance costs across hydronic systems. For example, the self-balancing design removes the need for periodic rebalancing, minimising performance and degradation issues. Additionally, high-quality Valves are engineered with fewer moving parts and durable internal mechanisms, which reduces the likelihood of mechanical failure.

How does a PICV Valve for FCU compare to traditional control valves?

Traditional FCU control valve arrangements typically require a separate balancing valve, temperature control valve and differential pressure control valve and they are highly sensitive to system pressure changes. Their PICV counterparts integrate dynamic flow control, temperature control and pressure regulation into a single unit. They maintain a constant flow rate even when system pressure fluctuates, thereby ensuring optimal performance at all times.

What are the common applications of these valves?

These valves are ideal for a wide range of applications where consistent thermal control and energy efficiency are priorities. In commercial buildings, such as offices and shopping centres, PICV Valve Installation helps balance flow across numerous FCUs and reduces HVAC energy consumption. They are also increasingly used in residential and educational developments where zonal control and compact installations are critical.

Are these valves compatible with existing HVAC systems?

Absolutely. Our modern Valves are compatible with both new builds and retrofit projects. For building managers looking to upgrade existing HVAC systems without a full overhaul, PICV Valve Installation provides an easy and effective solution.

How often do PIC valves require maintenance or replacement?

These valves are designed for low-maintenance operation, making them an ideal choice for long-term system efficiency. Under normal operating conditions, they do not require frequent intervention after the PICV Valve for AHU Installation. Routine inspection and cleaning are recommended to ensure ongoing performance. These valves can serve you for years while delivering an unquestionable performance.

What is the expected lifespan of a FlowCon PICV Valve for AHU?

The valves at FlowCon are engineered for exceptional durability and long service life. They are made from corrosion-resistant materials and tested to stringent industry standards. These valves are built to withstand the mechanical and thermal stresses typical of their operation environments. With proper installation and maintenance, the Valves typically offer a lifespan of 10+ years.