Atlas Copco LT Series Bare Block Pumps

Atlas Copco LT Series Bare Block Pumps (Compressor Heads)

Industrial-Grade Oil-Lubricated Piston Pumps for Custom Integration

When standard air compressors cannot meet your exact specifications, building or repairing your own system demands an uncompromising foundation. The Atlas Copco LT Series of “Bare Block” (suffix B) compressor pumps provides the ultimate solution for OEM integrations, custom stationary rigs, and direct replacements. Engineered with premium aluminum and cast iron components, these blocks are renowned for boasting the lowest operating temperatures in the industry and delivering exceptional reliability under extreme continuous-use conditions.

The models listed below feature a distinct nomenclature: the first number indicates the horsepower (HP) class, the number following the dash indicates the maximum pressure rating in bar, and the letters (S, CV, UV) denote the valve/unloader configuration.

Below is an overview of the Atlas Copco LT bare block lineup, categorized by their maximum pressure capabilities.

The 10-Bar Series: Standard Industrial Pressure (145 PSI)

Models: LT2-10S B, LT3-10S B, LT4-10CV B, LT5-10CV B, LT5-10S B, LT7-10UV B, LT10-10UV B

Designed for standard industrial operations, these single-stage 10-bar blocks provide continuous, high-volume 145 PSI performance. They are lightweight yet incredibly durable, maximizing air delivery for everyday commercial use.

• Power Range: 2 HP to 10 HP
• Compression Type: Single-Stage
• Valve Configurations: Available in Standard (S), Check Valve (CV) for straightforward start/stop regulation, and Unloading Valve (UV) for continuous-run applications.
• Best For: General manufacturing, automotive repair shops, commercial painting, and high-volume pneumatic tool operations.

The 15-Bar Series: Medium-High Pressure (218 PSI)

Models: LT2-15S B, LT3-15S B, LT5-15CV B, LT7-15UV B, LT10-15UV B

When heavy-duty impact wrenches and specialized commercial equipment require a step up in pressure, these 15-bar blocks utilize advanced two-stage compression to safely deliver 218 PSI.

• Power Range: 2 HP to 10 HP
• Compression Type: Two-Stage with integral intercooling to safely manage compression heat.
• Best For: Heavy-duty commercial vehicle maintenance, commercial tire shops, and specialized pneumatic machinery requiring sustained medium-high pressure.

The 20-Bar Series: High-Pressure Industrial (290 PSI)

Models: LT3-20S B, LT5-20UV B, LT7-20UV B, LT10-20UV B, LT15-20UV B, LT20-20UV B

Engineered for rigorous industrial environments where standard compressors stall. These robust two-stage pumps are built with heavy-duty internal tolerances to push air to a demanding 290 PSI without sacrificing component longevity.

• Power Range: 3 HP to 20 HP
• Compression Type: Two-Stage
• Best For: Plastics molding, industrial pressure testing, specialized fleet services, and facilities requiring high-pressure pneumatic reserves.

The 30-Bar Series: Ultra-High Pressure (435 PSI)

Models: LT3-30S B, LT5-30CV B, LT7-30UV B, LT10-30UV B, LT15-30UV B, LT20-30UV B

The absolute pinnacle of the LT piston lineup. These blocks are strictly engineered for the harshest, highest-pressure commercial applications on the market. They safely and continuously deliver a staggering 435 PSI, effectively acting as the heartbeat for highly specialized industrial systems.

• Power Range: 3 HP up to massive 20 HP blocks.
• Compression Type: Two-Stage (High-compression ratio design).
• Best For: Marine engine starting systems, commercial PET bottle blowing, specialized high-pressure gas storage, and extreme off-shore or industrial applications.

Shared Premium Features Across All LT Bare Blocks:

• V-Design Architecture: The unique V-cylinder configuration provides superior vibration dampening and naturally balances the pump for smoother operation.
• Industry-Leading Cooling: Constructed with lightweight, highly conductive materials and deep cooling fins to dramatically lower operating temperatures and reduce oil carryover.
• Premium Valves: Equipped with Atlas Copco’s proprietary stainless steel valve plates, ensuring maximum volumetric efficiency and a massive reduction in mechanical wear.
• Direct Integration: All blocks are precision-machined for easy coupling or V-belt drive integration into your custom baseplate or existing receiver tank setup.