APR Control Products

Maximize Comfort & Efficiency with Precision Temperature Control of the Electronic APR-E™ Valve! Since 1993, Rawal Devices has successfully manufactured and sold the mechanical APR Control valve for continuous capacity modulation on new or existing, in-place HVAC systems. In 2009, Rawal introduced the electronic APR-E valve… Read More

The APR Control Enhances Heat Pumps In the case of heat pumps, you have to prioritize capacity for either cooling or heating.  If you are prioritizing and sizing for the heating load, the result will often be excess cooling capacity. The APR Control will… Read More

Rawal Devices manufactures the APR Control & APR-E Valve in many different sizes for a variety of refrigerants APR Model # Modulation Capacity APR-410-1 1.5 tons APR-410-2 2.5 tons APR-410-3 3.5 tons *APR-410-5 5.5 tons APR-410-6 6.5 tons APR-410-10 10 tons APR Control Application Example System Tonnage 5 Tons 5… Read More

This webpage provides a comprehensive suite of resources to simplify and expedite the installation process of Rawal APR Control. Find essential materials lists, preparation guides, and even a free webinar offered by Rawal Devices to ensure a smooth and successful installation for your HVAC system. Read More

The APR Control® a capacity-control device that modulates a system’s air conditioning or refrigeration capacity to match variations occurring in the BTU quantity of the existing load Read More

We are pleased to assist both new and long-term customers with selection of the best APR Control model (percentage of modulation) for their particular application. Read More

In any controlled environment avoid equipment off-cycles so you don’t “lose the room!” Maintaining tight temperature and humidity levels in controlled environments such as cleanrooms is critical to prevent material damage, production loss, and shutdowns. Installing the Rawal Devices’ APR Control can be the perfect, cost-effective solution to avoid any interruptions in production as a result of the failure to maintain quality. Read More

It is no secret that a system with the ability to modulate capacity can provide better reliability and fewer operating problems. Without modulation capabilities an oversized system is likely to cause unnecessary stresses on the systems compressor and other vital components. Read More

One of the biggest contributing factors to high humidity is the lack of compressor run-time, commonly known as short cycling. This is often a result of a system being oversized, providing too much cooling capacity for a space, and satisfying the thermostat too quickly. Read More