The HKC HQ Series (Covering models: HQ-008, HQ-010, HQ-015, HQ-020, HQ-030, HQ-050, HQ-060, HQ-080, HQ-120, HQ-200, HQ-270, HQ-300, HQ-350, HQ-400, HQ-600, HQ-800, and HQ-900) is the premier flagship quarter-turn electric valve actuator line manufactured by HKC Co., Ltd. (South Korea). Engineered for high-duty 90-degree rotary valve automation (including butterfly valves, ball valves, plug valves, and large ventilation dampers), the HQ Series offers robust mechanical reliability, high torque density, and flexible modular automation options in harsh industrial environments.

KEY PRODUCT FEATURES AND OPERATIONAL ADVANTAGES:
1. Broad Torque Coverage & Comprehensive Model Selection (80 Nm to 9,000 Nm):
Spanning compact models (HQ-008: 80 Nm, HQ-015: 150 Nm) to extreme-duty units (HQ-600: 6,000 Nm, HQ-900: 9,000 Nm), it accommodates valve sizes ranging from small DN15 (1/2") ball valves up to massive DN1500 (60") butterfly valves in major municipal pumping and power installations.
2. Self-Locking Double Worm Gear Drive Train:
Constructed with precision-hardened alloy steel worm gears meshing with high-strength aluminum-bronze worm wheels, delivering a completely self-locking mechanical gear mechanism. The valve position remains locked at any set throttling angle against fluid dynamic forces without motor hunting or back-driving.
3. Safe Declutchable Manual Handwheel Override:
Features an integrated manual handwheel with a positive-latch declutch lever. For emergency operation or power failure, manual control is engaged smoothly; upon electrical motor energization, the auto-declutch mechanism immediately disengages manual drive to guarantee operator safety.
4. Comprehensive Travel & Torque Overload Protection:
• Dual SPDT travel limit switches (250V AC 10A/16A) for full Open and Close positions.
• Two auxiliary SPDT limit switches for remote valve status confirmation.
• Models HQ-015 and above include dual mechanical torque switches (Open/Close) that instantaneously cut motor power when valve jamming or mechanical obstruction is detected.
5. Versatile Control & Modular Networking Options:
• Standard On/Off Control (AC or DC power options).
• PCU (Proportional Control Unit): Delivers high-precision modulating throttling responding to 4-20 mA DC / 0-10 V DC command signals with integrated CPT (4-20 mA) position feedback.
• BP (Fail-Safe Battery Pack): Built-in rechargeable backup power pack automatically drives the valve to a predetermined safe position (Open or Close) upon primary AC power loss.
• Industrial Fieldbus Integration: Modbus RTU and Profibus-DP cards for seamless DCS/SCADA network communication.
6. Heavy-Duty Corrosion-Resistant Enclosure – IP67, IP68 & Explosion-Proof:
Constructed with high-grade die-cast aluminum alloy treated with hard anodizing and exterior polyester powder coating for marine-grade corrosion resistance. Rated IP67 weatherproof as standard (optional IP68 submersible 10m/72h) and certified to international explosion-proof standards: ATEX, IECEx, KCs, EAC, CCC (Ex db IIB T4 Gb).

TYPICAL INDUSTRIAL APPLICATIONS:
• Water & Wastewater Infrastructure: Raw water intake butterfly valves, booster pump isolation, and aeration basin control valves.
• Power Generation & District Energy: Cooling water circulation butterfly valves, condensate isolation, and flue gas damper control.
• Chemical & Oil & Gas Refineries: Explosion-proof ball valves, tank farm emergency isolation, and process solvent distribution.
• Commercial HVAC & Industrial Chiller Plants: Modulating butterfly valves for chiller water control, cooling tower loop balancing, and AHU air flow dampers.

• Manufacturer: HKC Co., Ltd.
• Series: HQ Series (Quarter-Turn Electric Actuator)
• Brand Origin: South Korea
• Applicable Models: HQ-008, HQ-010, HQ-015, HQ-020, HQ-030, HQ-050, HQ-060, HQ-080, HQ-120, HQ-200, HQ-270, HQ-300, HQ-350, HQ-400, HQ-600, HQ-800, HQ-900
• Travel Angle: 90° (± 10° adjustable via external mechanical travel stops)
• Output Torque Capabilities:
  - Model HQ-008: 80 Nm (8 kgf·m)
  - Model HQ-010: 100 Nm (10 kgf·m)
  - Model HQ-015: 150 Nm (15 kgf·m)
  - Model HQ-020: 200 Nm (20 kgf·m)
  - Model HQ-030: 300 Nm (30 kgf·m)
  - Model HQ-050: 500 Nm (50 kgf·m)
  - Model HQ-060: 600 Nm (60 kgf·m)
  - Model HQ-080: 800 Nm (80 kgf·m)
  - Model HQ-120: 1,200 Nm (120 kgf·m)
  - Model HQ-200: 2,000 Nm (200 kgf·m)
  - Model HQ-270: 2,700 Nm (270 kgf·m)
  - Model HQ-300: 3,000 Nm (300 kgf·m)
  - Model HQ-350: 3,500 Nm (350 kgf·m)
  - Model HQ-400: 4,000 Nm (400 kgf·m)
  - Model HQ-600: 6,000 Nm (600 kgf·m)
  - Model HQ-800: 8,000 Nm (800 kgf·m)
  - Model HQ-900: 9,000 Nm (900 kgf·m)
• Power Supply Options:
  - 1-Phase: 110V / 220V AC (50/60 Hz, ±10%)
  - 3-Phase: 220V / 380V / 440V / 460V / 480V AC (50/60 Hz, ±10%)
  - DC Power: 24V DC or 24V AC/DC
• Duty Cycle (IEC34-1):
  - Standard On-Off (S2): Max. 15 to 30 minutes
  - Modulating (S4): 30% to 50% duty cycle, 300 to 1,200 starts/hour
• Drive Motor: High-torque squirrel-cage induction motor with built-in thermal overload switch (150±5 °C auto-reset)
• Gearing: Precision-machined self-locking double worm gear drive train
• Manual Override: Declutchable manual handwheel with auto-motor reset
• Visual Indicator: Continuous wide-angle mechanical dome position indicator
• Travel Limit Switches: 2 x SPDT (250V AC 10A/16A) for Open / Close
• Auxiliary Limit Switches: 2 x SPDT (250V AC 10A/16A)
• Torque Limit Switches: 2 x SPDT (Open & Close, standard from model HQ-015 and above)
• Anti-Condensation Heater: 7-10W space heater with internal thermostat
• Valve Mounting Flange: ISO 5211 standard (F07, F10, F12, F14, F16, F25, F30) with removable double-D / keyed drive insert bushing
• Modular Control Options:
  - Standard On/Off Control
  - CPT: Current Position Transmitter (4-20 mA DC output)
  - PCU: Proportional Control Unit (4-20 mA / 0-10 V DC input and 4-20 mA DC output)
  - BP: Fail-Safe Battery Pack for emergency power loss repositioning
  - LCU: Local Control Unit (Open/Stop/Close pushbuttons & Local/Remote selector switch)
  - Fieldbus Protocols: Modbus RTU, Profibus-DP
• Conduit Cable Entries: 2 x PF 3/4" (Standard) or 2 x NPT 3/4", 2 x M25 (Flameproof option)
• Housing Material: High-grade die-cast Aluminium alloy
• Surface Treatment: Hard anodizing plus electrostatic polyester powder coating
• Ingress Protection (Enclosure):
  - Standard: Weatherproof IP67
  - Option: Watertight submersible IP68 (10 m depth for 72 hours)
• Explosion-Proof Certification (Optional): Ex db IIB T4 Gb (ATEX, IECEx, KCs, EAC, CCC)
• Ambient Operating Temperature:
  - Standard: -20 °C ... +70 °C
  - Flameproof: -20 °C ... +60 °C
  - Low-Temperature Option: -60 °C ... +60 °C
• Ambient Humidity: Max. 90% RH (Non-condensing)