Central air conditioning and HVAC

Fluid control valves are core components of central air-conditioning HVAC water systems, widely used in chilled water, cooling water, and heating hot‑water circulation loops. They perform functions such as pipeline on/off control, flow regulation, hydraulic balancing, pressure protection, and medium backflow prevention, directly influencing air-conditioning temperature‑control performance, system energy consumption, and equipment operational safety. Central air-conditioning systems typically operate with ambient‑temperature, low‑pressure water as the working medium, placing high demands on valve sealing reliability, low flow resistance, quiet operation, and resistance to water hammer. These valves are extensively deployed in chiller rooms, heat‑exchanger stations, floor‑level piping, and indoor terminal units.

In the chiller room and on the host‑side piping, butterfly valves, ball valves, and gate valves are used to isolate and shut off pipelines for chillers, pumps, and cooling towers, ensuring water flow is cut off during equipment maintenance. Check valves prevent backflow of the working fluid when the pump stops, thereby eliminating water hammer. Safety valves and automatic make‑up water valves maintain stable system pressure, guarding against overpressure and low‑water conditions. Each branch of the manifold is equipped with balancing valves; by adjusting these static and dynamic balancing valves, flow rates in each loop can be regulated, addressing hydraulic imbalances in the piping network and preventing uneven heating or cooling in certain areas.

In terminal air-conditioning systems, fan coil units, air-handling units, and fresh-air handling units are equipped with motorized two‑way valves and motorized control valves, which interface with indoor thermostats to automatically modulate chilled‑water and hot‑water flow in response to changes in indoor load. This enables zone‑based temperature control and reduces pump‑related distribution energy consumption. For high‑end projects, dynamic‑balance motorized control valves are selected to counteract pressure fluctuations in the piping network, ensuring precise temperature regulation and meeting the needs of office buildings, hospitals, commercial complexes, and other building types. At heat‑exchanger stations, control valves proportionally regulate flow on both the primary and secondary sides, stabilizing supply water temperatures and ensuring balanced heating and cooling throughout the entire building.

The mainstream materials for HVAC valves are ductile iron and copper alloys, with EPDM rubber commonly used for sealing. Actuation options include manual and electric types; smart valves can be integrated into building automation (BA) systems to enable remote monitoring and automated control. As high-efficiency machine rooms become more widespread, valves are no longer mere pipeline accessories. Optimizing valve selection to reduce piping resistance can significantly cut pump energy consumption, making it a critical component of energy‑saving retrofits for central air-conditioning systems.

More cases

New energy

New energy

Fluid control valves are core foundational components in the new‑energy industry chain, performing functions such as media on/off switching, flow regulation, pressure control, safety shut‑off, and pressure‑relief protection. They are widely used across major sectors including **lithium batteries, hydrogen energy, photovoltaics, energy storage, and wind power**. New‑energy operating conditions typically feature **severe corrosion, high purity and cleanliness, high pressure or ultra‑low temperatures, flammability and explosiveness, as well as miniaturization and intelligent integration**, demanding valve materials, sealing, fatigue resistance, and zero‑leakage performance that far exceed those of conventional industrial valves.

Water purification system

Water purification system

Fluid control valves are the core actuating components of water purification systems, widely used in residential water filtration, commercial direct‑drinking water applications, industrial reverse osmosis pure‑water production, and various water‑treatment equipment. They perform functions such as media on/off switching, flow regulation, pressure control, backflow prevention, and automatic flushing, directly ensuring effluent water quality, equipment safety, and the overall service life of the system. The working media in these systems typically include tap water, purified water, concentrate, and cleaning agents, which impose stringent requirements on the valves: food‑grade materials, zero leaching, reliable sealing, resistance to water hammer, and corrosion resistance.

Air compressor

Air compressor

Fluid control valves are critical auxiliary components of air compressor units, primarily used in screw‑type and centrifugal compressors as well as in downstream treatment systems. They manage compressed air on/off switching, pressure regulation, pipeline pressure relief, oil–air separation, and backflow prevention, ensuring stable supply pressure, safe equipment start‑up and shutdown, and reduced risk of unit failures. The working media include compressed air, lubricating oil, and condensate, while operating conditions are characterized by pressure fluctuations, temperature variations, and the presence of oil and water. Consequently, these valves must provide reliable sealing, rapid response, and excellent fatigue resistance, making them well suited to the frequent start‑stop cycles typical of compressor applications.

Central air conditioning and HVAC

Central air conditioning and HVAC

Fluid control valves are core components of central air-conditioning HVAC water systems, widely used in chilled water, cooling water, and heating hot‑water circulation loops. They perform functions such as pipeline on/off control, flow regulation, hydraulic balancing, pressure protection, and media backflow prevention, directly influencing air-conditioning temperature‑control performance, system energy consumption, and equipment operational safety. Central air-conditioning systems typically operate with ambient‑temperature, low‑pressure water as the working medium, placing stringent demands on valve sealing reliability, low flow resistance, quiet operation, and resistance to water hammer. These valves are extensively deployed in chiller rooms, heat‑exchanger stations, floor‑level piping, and indoor terminal units.

Data center

Data center

Fluid control valves are critical components of data center cooling systems, primarily deployed in chiller rooms, precision air conditioners, server liquid‑cooling loops, and fire‑water systems. They perform functions such as media on/off switching, flow regulation, hydraulic balancing, pressure protection, and emergency shut‑off, ensuring stable server heat dissipation and preventing equipment downtime due to cooling failures. These valves are subject to stringent requirements for sealing reliability, low flow resistance, leak prevention, and long‑term continuous operation. The working media typically include chilled water, ethylene glycol‑based coolants, and deionized water, with some applications involving fire‑fighting fluids.