Refcomp SP4HN1200 SP4HN120E Semi-Hermetic Type Refrigeration Compressor

The SP4HN1200 semi-hermetic compressor is a 4-cylinder reciprocating unit designed for medium-to-high temperature liquid chilling and commercial HVAC applications.

• Dynamic Balance Crankshaft Assembly
  Designed with a custom-balanced crankshaft, high-strength connecting rods, and precision pistons, this compressor minimizes operational vibration and running noise. Wear-resistant pin bushings support continuous rotation and significantly prolong service life.
• Heavy-Duty Sliding Bearing Structure
  The internal structure incorporates precision sliding bearings and thrust washers to absorb axial and radial mechanical forces. Supported by continuous oil lubrication, the bearing mechanism delivers reliable running stability over long operational cycles.
• Built-In Motor & INT6982 Protection
  Driven by an efficient multi-voltage motor supporting part-winding start, the compressor features an integrated INT6982 protection module to shield windings against thermal overload. The motor insulation works reliably with common refrigerants including R22, R134a, R407C, and R404A.
• Internal Overpressure Safety Valve
  An internal safety relief valve connects the high and low-pressure chambers to guard against pressure surges. The valve automatically opens to equalize internal pressure whenever safe operational limits are exceeded, then reseats securely to protect critical components.

• Commercial Water Chillers
  Suitable for central HVAC chillers, packaged liquid cooling units, and air-conditioning systems.
• Industrial Process Cooling
  Designed for industrial fluid cooling equipment requiring continuous operation and precise temperature control.
• Cold Storage Warehouses
  Ideal for medium-temperature food holding facilities, agricultural post-harvest storage, and distribution centers.
• Supermarket Parallel Racks
  Applicable to multi-compressor rack configurations feeding commercial display cases and cold rooms.

Coolstart is a modern, large-scale refrigeration enterprise with over 20 years of technical expertise in the cooling industry. Specializing in reciprocating, scroll, screw, semi-hermetic, and rotary compressors, as well as cold storage and ice-making equipment, Coolstart delivers full OEM/ODM customization services to global partners. Our products are exported to numerous international markets, including Russia, the United States, the United Kingdom, the United Arab Emirates, and Saudi Arabia, earning widespread recognition for engineering quality and cost-effectiveness.

• How do I verify whether the SP4HN1200 model meets my system cooling load?
  Evaluate required capacity, operating temperature range, and refrigerant type against the compressor displacement rate. Providing target working conditions allows engineering teams to verify exact sizing.
• What key installation checks should be performed when mounting this unit?
  Confirm line connection diameters, inspect mounting pad leveling, and verify electrical control panel capacity against the motor starting current.
• How does the internal protection module safeguard motor operation?
  The module continuously monitors winding temperature and breaks the control circuit during thermal spikes or supply phase abnormalities to prevent winding damage.
• What warranty terms does Coolstart offer for semi-hermetic units?
  Coolstart provides a standard one-year warranty across all compressor product lines covering manufacturing defects under standard operating conditions.
• What details are required to obtain a formal quotation from Coolstart?
  Please specify your required model, order quantity, preferred refrigerant, voltage specification, operating conditions, and project requirements to receive a quote within eight hours.