The HKC HM Series (Covering models: HM-004, HM-008, HM-011, HM-020, HM-040, HM-060, HM-100, HM-150, HM-200, and HM-300) is designed and manufactured by HKC Co., Ltd., a premier valve automation leader based in South Korea. The HM Series represents a next-generation intelligent electric multi-turn actuator engineered specifically for multi-turn valve operations (such as gate and globe valves) and, when paired with secondary gearboxes, for large-diameter quarter-turn ball and butterfly valves in high-demand industrial installations.

KEY PRODUCT FEATURES AND OPERATIONAL ADVANTAGES:
1. Broad Torque Range & Comprehensive Model Portfolio:
Offers direct output torque capabilities ranging from 35 Nm up to 3,000 Nm (for 3-Phase power supply) and from 25 Nm up to 450 Nm (for 1-Phase power supply), satisfying actuator requirements from compact piping lines to heavy-duty industrial valve installations.
2. Non-Intrusive Commissioning & Smart LCD Interface:
Features a wide digital LCD display providing real-time operational feedback, including valve travel percentage (%), dynamic output torque, diagnostic status, and error logs. Setup and calibration of travel limits and torque settings are completed non-intrusively via an infrared remote control without opening electrical enclosure covers, safeguarding internal electronics from ambient moisture.
3. Advanced Diagnostic & Pipeline Protection Features:
Equipped with a built-in Partial Stroke Test (PST) routine for periodic online valve health monitoring without disrupting process flow, alongside integrated Water Hammer Prevention logic that slows down valve closing speeds near seat contact.
4. Versatile Control Options (On/Off - Modulating - Fieldbus):
• CPT (Current Position Transmitter): Transmits continuous 4-20 mA DC feedback of actual valve position.
• PCU (Proportional Control Unit): Delivers high-resolution modulating positioning control (Input/Output: 4-20 mA DC or 0-10 V DC).
• Industrial Fieldbus Integration: Optional PROFIBUS-DP and MODBUS RTU network cards enable seamless integration into plant-wide DCS/SCADA architectures.
5. Declutchable Manual Handwheel with Automatic Motor Return:
Includes an integrated manual handwheel with a declutchable mechanism for emergency manual override. Upon electrical command, the drive automatically disengages manual operation to prioritize motor control and protect plant personnel.
6. Heavy-Duty Enclosure & International Explosion-Proof Certifications:
• High-grade cast aluminum alloy housing (models HM-004 to HM-060) and heavy-duty nodular cast iron construction (models HM-100 to HM-300).
• Surface-finished with hard anodizing and polyester powder coating for extreme resistance against chemical corrosion and offshore marine salt spray.
• Rated IP67 weatherproof as standard (optional IP68 submersible up to 10 m for 72 hours) and certified to global hazardous area standards: ATEX, IECEx, KCs, EAC, CCC (Ex db IIB +H2 T4 Gb), and functional safety SIL 2.

TYPICAL INDUSTRIAL APPLICATIONS:
• Thermal & Hydroelectric Power Generation: Boiler feed water valves, high-pressure steam isolation valves, and cooling water circuits.
• Oil, Gas & Petrochemical Refineries: Crude oil pipeline gate valves, gas manifold globe valves, and tank farm isolation in hazardous explosion-proof areas.
• Water & Wastewater Infrastructure: Pumping station discharge isolation, water treatment inlet gates, and flood control distribution sluices.
• Heavy Industry & Steel Mills: Blast furnace gas cooling lines, raw material distribution pipelines, and cement slurry handling lines.

• Manufacturer: HKC Co., Ltd.
• Series: HM Series (Electric Multi-Turn Actuator)
• Brand Origin: South Korea
• Applicable Models: HM-004, HM-008, HM-011, HM-020, HM-040, HM-060, HM-100, HM-150, HM-200, HM-300
• Motion Type: Multi-turn rotation (or 90° quarter-turn when coupled with HGO gearbox)
• Output Torque Capabilities:
  - 1-Phase Models: 25 Nm to 450 Nm
  - 3-Phase Models: 35 Nm to 3,000 Nm (Model breakdown: HM-004: ~40Nm, HM-008: ~80Nm, HM-011: ~110Nm, HM-020: ~200Nm, HM-040: ~400Nm, HM-060: ~600Nm, HM-100: ~1000Nm, HM-150: ~1500Nm, HM-200: ~2000Nm, HM-300: ~3000Nm)
• Power Supply Options:
  - 1-Phase: 110V / 220V AC (50/60 Hz, ±10%)
  - 3-Phase: 220V / 380V / 440V / 480V AC (50/60 Hz, ±10%)
• Duty Cycle:
  - 1-Phase: S2 (On-Off) 15 mins, S4 (Modulating) 25%, 60 ~ 200 starts/hour
  - 3-Phase: S2 (On-Off) 30 mins, S4 (Modulating) 35%, 60 ~ 200 starts/hour
• Housing Material:
  - HM-004 to HM-060: High-grade die-cast Aluminium alloy
  - HM-100 to HM-300: Aluminium alloy & Nodular cast iron
• Ingress Protection (Enclosure):
  - Standard: Weatherproof IP67
  - Option: Watertight submersible IP68 (10 m depth for 72 hours)
• Explosion-Proof Rating (Optional): Ex db IIB +H2 T4 Gb
• International Certifications: IECEx, ATEX, KCs, EAC, CCC, ABS, RMRS, SIL 2
• Display Interface: High-contrast backlit LCD screen displaying position %, torque %, alarms, and operating status
• Commissioning Method: Non-intrusive infrared remote control
• Manual Override: Declutchable manual handwheel with auto-motor reset
• Position Switches: Standard 4 x SPST (5A 250V AC); Optional up to 16 x SPST
• Control & Communication Options:
  - Standard On/Off Control
  - CPT: Current Position Transmitter (4-20 mA DC output)
  - PCU: Proportional Control Unit (4-20 mA DC or 0-10 V DC input/output)
  - Fieldbus Protocols: PROFIBUS-DP, MODBUS RTU
• Ambient Operating Temperature:
  - Standard: -20 °C ... +70 °C
  - Flameproof: -20 °C ... +60 °C
  - Low Temperature: -60 °C ... +60 °C (EAC option)
• Cable Conduit Entries: 4 x NPT 1" / 1 x NPT 1½" (or PF conduit standards)