PVR Controls

Established in 1986, A.S. Controls Pvt. Ltd. has steadily built a legacy of excellence in the field of electronics and industrial refrigeration. With over three decades of experience, we stand today as one of India’s prominent manufacturers, suppliers, and exporters of high-performance electronic controllers and refrigeration control systems. All our offerings are delivered under the trusted brand names Sub-Zero and Castle, each of which has become synonymous with reliability, durability, and innovation in its domain.

Under the Sub-Zero brand, we have developed an expansive portfolio of electronics control solutions tailored to meet the dynamic needs of HVAC&R, cold chain, and industrial automation sectors. Our range includes Temperature, Humidity, and Pressure Controllers and Indicators, along with sophisticated Process Temperature Controllers, Scanners, Data Loggers, Deep Freezer Controllers, Cold Room and Chiller Controllers, Freezer Controllers, and Line Voltage Monitors. These products are engineered using premium-grade raw materials and the latest in embedded and control technologies, ensuring precision, stability, and long-term performance in demanding environments. Each product undergoes rigorous quality checks and performance validation, in line with international standards, before it reaches our customers.

Complementing our electronic control solutions is the Castle brand, under which we manufacture a comprehensive range of Ammonia and Freon-based Valves and Controls. Designed specifically for industrial refrigeration applications, this line includes Ammonia Liquid Level Indicators and Controllers, Ammonia Leak Detectors, Water Flow Switches, and essential accessories for cold room doors. The Castle range also features a variety of industrial-grade valves including Ball Valves, Globe Valves, Hand Shut Off Valves, Non-Return Valves (Check Valves), and Expansion Valves. Each component is crafted to ensure superior mechanical reliability, leak-proof performance, and long service life, making them ideal for large-scale installations in cold storage, food processing, dairy, and pharmaceutical environments.

At PVR Controls (previously known as A.S. Controls), quality and innovation are not just values — they are foundational principles. Our manufacturing operations are driven by a culture of continuous improvement and are supported by an experienced engineering team, advanced production infrastructure, and stringent in-house testing protocols. Every product reflects our commitment to technical excellence and our focus on addressing the real-world challenges faced by our clients.

Today, with a growing footprint in domestic and international markets, PVR Controls remains dedicated to delivering future-ready solutions that power critical refrigeration and automation systems. As we look ahead, we remain anchored in our mission to advance industrial performance through intelligent design, sustainable quality, and customer-centric innovation — values that have defined us for nearly four decades and will continue to guide us into the future.

We are a leading name, which is engaged in manufacturing, supplying and exporting Electronic Controllers, Mechanical Valves/ Controls & Valves for Ammonia. This range is designed utilizing high grade raw material and innovative techniques in complete adherence with the international quality norms and standards. The offered range is suitably checked on different characteristics to maintain its authenticity throughout the designing process. In addition to this, we are engaged in offering Oil Separators, Door Latches and Strainers. This range is widely appreciated in the market for its corrosion resistant, durability and high performance. All our products are offered under the brand name Castle and Subzero. Detailed description is mentioned below: