40 HP Reciprocating Booster Air Compressor

The SJ PB 40 is a reciprocating booster air compressor designed to increase existing compressed air pressure from standard plant levels to high-pressure requirements for specialized industrial applications. This system is not a primary compressor; it is engineered to take pre-compressed air (typically 7–13 bar) and boost it to higher pressure levels up to 40 bar.

This makes it a critical component in industries where standard compressors cannot meet pressure requirements, especially in PET blowing, high-pressure testing, and process applications.

• Model: SJ PB 40

• Type: Reciprocating Booster Air Compressor

• Power: 40 HP / 30 kW

• Minimum Delivery Pressure: 15 Bar (218 PSI)

• Maximum Delivery Pressure: 40 Bar (580 PSI)

• Suction Capacity:

  • 200 CFM @ 7 Bar inlet

  • 275 CFM @ 10 Bar inlet

  • 350 CFM @ 13 Bar inlet

The SJ PB 40 operates as a secondary compression stage (booster):

1. Air is first generated by a primary compressor (screw or piston)

2. This air enters the booster at medium pressure (7–13 bar)

3. Booster compresses it further to high pressure (up to 40 bar)

• Standard compressors efficiently operate up to 7–13 bar

• High-pressure applications (25–40 bar) require staged compression Booster systems are used because:

• Direct compression to high pressure is inefficient

• Multi-stage compression improves energy efficiency

• Booster allows use of existing compressor system

Used in:

• Packaged drinking water plants

• Soft drink and beverage industries

• FMCG packaging plants

Machines:

• PET stretch blow molding machines

Process:

• Pre-compressed air (7–13 bar) → booster → 30–40 bar

• High-pressure air used for final bottle shaping

Why booster:

• Required pressure for PET blowing: 30–40 bar

• Booster provides final stage compression efficiently

Used in:

• Pipeline pressure testing

• Vessel and tank testing

• Valve testing systems

Machines:

• Hydro-pneumatic test rigs

• Pressure calibration systems

Why booster:

• Testing requires high pressure beyond standard compressors

• Booster ensures controlled pressure increase

Used in:

• PET and plastic container manufacturing

• Blow molding systems

Machines:

• Blow molding machines

• Injection blow systems

Why:

• High-pressure air required for shaping and forming processes

Used in:

• Pipeline pressure testing

• Leak detection systems

• Gas system validation

Machines:

• Pressure testing units

• Pipeline maintenance systems

Why:

• High-pressure air required for safety and integrity testing

Used for:

• Air boosting applications

• Pre-compression for storage systems

• Gas compression (limited scale)

Why:

• Existing system pressure insufficient

• Booster increases pressure without replacing main compressor

Used in:

• High-pressure pneumatic systems

• Specialized industrial tools

• Controlled pressure applications

Industries:

• automotive

• heavy fabrication

• machinery manufacturing

Used in:

• High-pressure air cleaning systems

• Surface preparation processes

Why:

• Higher pressure improves cleaning efficiency

• Used in heavy industrial environments

• Lower capital cost (uses existing compressor)

• More energy-efficient multi-stage compression

• Flexible system design

• Standard compressors limited to ~13 bar

• Booster required for 25–40 bar applications

Best suited for:

• PET bottle blowing systems

• High-pressure testing applications

• Air boosting in existing compressed air systems

• Industrial processes requiring 25–40 bar air

Not suitable for:

• General workshop air

• Low-pressure applications

• Standalone air generation (requires primary compressor)

To operate SJ PB 40 effectively:

• Primary compressor (7–13 bar supply)

• Air receiver before booster

• Aftercooler and moisture separator

• High-pressure storage tank

• Safety valves and pressure control system

• Requires stable inlet pressure for efficient operation

• High-pressure systems require proper safety controls

• Maintenance required for piston components

• Heat generation higher due to high compression ratio

The SJ PB 40 is positioned as:

• A high-pressure booster system for industrial processes

• A critical component in PET and testing industries

• A cost-effective solution for upgrading pressure without replacing compressors

• Need 7–13 bar → Screw or piston compressor

• Need 25–40 bar → Booster system required

• Already have compressor → Add booster (SJ PB 40)

Booster compressors are selected when:

• Existing compressor capacity is sufficient in CFM

• Only pressure needs to be increased

• Process requires staged compression

Choose SJ PB 40 when:

• You already have a compressor system

• Your process requires higher pressure than available

• Replacing entire system is not economical