Semi-hermetic aluminium compressors for mobile use

• Available as 2- and 4-cylinder compressors in cast iron or all-aluminum lightweight construction
• Semi-hermetic compressors with 2-pole drive motor:
  Based on the HG standard compressors with their outstanding advantages and features, versions with 2-pole drive motor are available with up to 70% increased cooling capacity with the same external dimensions. This is made possible by doubling the speed at the same mains frequency. Together with the robust and reliable BOCK® K valve plate, this results in the optimal solution for bus air conditioning and many other mobile applications.
• 40% lighter than cast iron version due to lightweight aluminum construction
• Power control also possible digitally in wide bandwidth
• Reliable and efficient reciprocating piston technology with optimized valve plate system and low oil throw
• Highly efficient 4-pole and 2-pole electric motors
• Wear-resistant and durable power unit

• Powerful and compact 2-pole drive motor (2,900 1/min - 50 Hz)
• Reduced overall height (300 mm) with optional terminal box
• Lockable metal terminal box for access restriction
• Terminal blocks with enhanced serviceability and railroad approval, resistant to shock and vibration
• Fire protection class HL3 According to railroadstandard EN 45545-2, including special track painting
• Pressure lubrication with oil pump as standard
• Electronic motor protection

• Oil pump lubrication independent of direction of rotation
• Minimal oil throw
• Service-friendly oil strainer
• Oil pressure monitoring possible
• Large-volume oil sump
• PTC oil sump heater, self-regulating for HG12 to HG34e

The 2-pole design compressors offer unparalleled refrigerating capacity for power-intensive applications like mobile air conditioning. Available in both cast iron and lightweight aluminum construction, these compressors also come with optional low terminal boxes and a reduced overall height of 300 mm.

K valve plate advantages:

• Specially designed for bus air-conditioning
• Exceptional operational safety with loosely guided annular disc packs
• Working valves made of high-quality, impact-resistant spring steel
• Resilient and reliable under constant speed and pressure fluctuations, as well as exposure to liquids
• Lightweight, aluminum valve plate for weight optimization

N valve plate advantages:

• Worldwide proven valve design with reed lamellas clamped on one side
• High-quality, impact-resistant spring steel valves
• Suitable for universal use in mobile applications
• Cost-effective and simpler alternative to the K version
• Valve base plate made of steel