From district cooling networks to smart building automation, HGZK provides energy-efficient valve solutions for commercial, industrial, and residential HVAC systems worldwide.
Valve Application Photo
Max Valve Size
Pressure Rating
Building Projects
BMS Integration
Modern HVAC systems demand precise flow control, energy efficiency, quiet operation, and seamless integration with building management systems.
Chilled water and hot water loops require equal-percentage flow characteristics for stable temperature control across varying loads. Characterized control valve (CCV) technology ensures linear heat transfer response throughout the full stroke range.
Variable flow systems with pressure-independent control valves (PICV) reduce pumping energy by up to 50%. Combined temperature and flow control in a single valve body eliminates the need for separate balancing and control valves.
BACnet MS/TP and Modbus RTU communication enable direct BMS integration. Digital actuators with built-in controllers provide decentralized room/zone control. IoT-enabled predictive maintenance reduces facility operational costs.
Chillers, cooling towers, AHU coils, fan coil units, chilled beams
Pressure-independent control valves with actuator for active/passive chilled beam systems. Maintains constant flow regardless of pressure fluctuations for stable space temperature control.
2-way and 3-way characterized ball/globe control valves with proportional actuators. 0-10V or 4-20mA control signal for precise coil capacity modulation.
Motorized 6-way valves for 4-pipe system changeover. Simultaneous heating/cooling capability with automatic seasonal switchover. Minimizes pipe work complexity.
District cooling/heating networks, thermal storage, energy transfer stations
Butterfly valves with electric actuators for district cooling/heating isolation. Extended stem for buried service. Insulation jacket for condensation protection.
Combined control valve + ultrasonic flow meter + temperature sensors. Integrated BTU calculator with M-Bus/BACnet data output for tenant energy billing.
Motorized butterfly valves for stratified chilled water thermal storage. Fast-acting (under 30s) for charging/discharging mode switching. Position feedback to BMS.
Automatic balancing, differential pressure control, zone control
Maintains constant differential pressure across riser/branch. Eliminates hydraulic interaction between circuits. Spring-loaded diaphragm design, maintenance-free operation.
Fixed orifice double-regulating valves with memory stop and pressure/temperature test points. For commissioning and flow verification per ASHRAE guidelines.
BACnet/IP and Modbus TCP enabled actuators with embedded web server. Auto-stroke calibration, valve curve selection, and cloud-based remote diagnostics.
PICV - CCV - 2-Way / 3-Way - DN15-DN250
Combined DP regulator + characterized control ball in one body. Flow range 0.01-40 l/s. Actuator with fail-safe spring return option. DN15-DN100.
Equal-percentage characterized disc for linear flow response. 2-way and 3-way configurations. DN15-DN250 with PN16/25 rating. Complete with electric rotary actuator.
Compact 2-way/3-way zone valves for fan coil units and radiators. Thermal or motorized actuator. 230V/24V on-off or modulating control.
Wafer/Lug Type - EPDM/NBR Seat - Gear/Actuated
Ductile iron body, EPDM/NBR seat. Centric disc design for low torque. Gearbox or electric actuator. Ideal for chiller and cooling tower isolation.
Threaded lug body for dead-end service. Allows downstream pipe removal. Insulation-ready extended neck for hot/chilled water piping.
Y-type strainers with blowdown valve. Dual-plate wafer check valves for pump discharge. Protects downstream HVAC equipment from debris.
BACnet - Modbus - 0-10V - IoT Ready
Integrated BACnet controller in actuator housing. Direct BMS connection without separate controller. Auto-mapping of HVAC objects for plug-and-play commissioning.
Silent thermoelectric operation for noise-sensitive areas. 230V/24V NC/NO variants. First-open function for commissioning. Indicator ring for visual position check.
Cloud-connected valve controllers with embedded analytics. Energy monitoring, predictive maintenance alerts, and remote firmware updates via secure MQTT protocol.
BTU Meters - Flow Sensors - M-Bus/BACnet - MID Certified
Integrated flow sensor + temperature pair + calculator. MID Class 2 certified. M-Bus, Modbus, or pulse output. For tenant and sub-metering applications.
Battery or mains powered. No moving parts, zero pressure loss. Integrated temperature sensors for energy calculation in large-bore district energy mains.
0-10V or 4-20mA output sensors. NPT/G threaded process connections. For differential pressure measurement across control valves in hydronic systems.
HGZK serves oil & gas, chemical, power, water, mining, and many other industrial sectors.
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