KIMAIR KORW Series Medium-pressure Oil-free Reciprocating Air Compressors

The KORW series is a medium-pressure, oil-free reciprocating air compressor meticulously crafted by KIMAIR, inheriting classic designs and specifically engineered for the PET bottle blowing industry. It utilizes a proven L-type, two-cylinder, water-cooled structure to achieve 100% oil-free compression, delivering a stable, pure medium-pressure air source of 1.6-2.5 MPa. Renowned for its robust durability, intuitive maintenance, and controllable long-term operating costs, this compressor is deeply trusted by bottle blowing manufacturers who prioritize reliability and return on investment. It is a true, enduring "workhorse" of the industry.

Category：

Medium-Pressure Oil-Free Piston Air Compressor

Click to consult a KIMAIR expert and get a quote.

| Product Details

Video Tutorial

KIMAIR KORW Series Medium-pressure Oil-free Reciprocating Air Compressors Principle Explanation Video

KIMAIR Core Advantages

Absolutely Oil-Free, Pure Air

- The piston rings are self-lubricating, requiring no oil injection into the cylinder. This fundamentally guarantees oil-free contamination of the discharged air, meeting food contact safety requirements.
Classic L-Type Structure

- Excellent force balance, smooth operation, minimal wear, and long service life. Particularly suitable for long-term, continuous, heavy-duty operation.
Efficient Water Cooling System

- Forced circulation water cooling provides outstanding heat dissipation and low discharge temperature, which benefits subsequent drying processes and protects valve life.
Simple & Direct Maintenance

- Intuitive structure. Wear parts (e.g., piston rings, valve plates) are standardized, allowing for quick replacement. Maintenance costs are transparent and low.
Strong Environmental Adaptability

- High tolerance to voltage fluctuations and intake air conditions. Demonstrates stable performance in areas with less reliable power supply.

Technical Specifications

Model	Motor Power		Pressure （MPa）	Free air delivery （m³/min）	Outlet （inch/mm）	Weight (kg）	Dimensions （mm）
Model	（kW）	（Hp）	Pressure （MPa）	Free air delivery （m³/min）	Outlet （inch/mm）	Weight (kg）	Dimensions （mm）
KORW-8.5/4.0	90	120	4.0	8.5	450	4050x1750x2380	5500
KORW-10/4.0	110	150	4.0	10	500	4050x1750x2380	5800
KORW-12/4.0	132	180	4.0	12	580	4050x1750x2380	6000
KORW-16/4.0	160	220	4.0	16	390	4650x2200x2780	7400
KORW-18/4.0	185	250	4.0	18	440	4650x2200x2780	7600
KORW-20/4.0	200	270	4.0	20	470	4650x2200x2780	7800
KORW-22/4.0	220	300	4.0	22	500	4650x2200x2780	8000
KORW-25/4.0	250	340	4.0	25	390	4950x2250x2980	8500
KORW-28/4.0	280	380	4.0	28	440	4950x2250x2980	8800
KORW-30/4.0	315	420	4.0	30	470	4950x2250x2980	9000

Application Scenarios

- Blow molding of various PET preforms: mineral water bottles, beverage bottles, edible oil containers, and personal care product packaging, among others.

- Other applications requiring medium-pressure oil-free air: such as pharmaceutical manufacturing and purging of precision instruments (with post-treatment to ensure dew point compliance).

Customer Frequently Asked Questions (FAQ)

Q: In the bottle blowing industry, how do you choose between an oil-free reciprocating air compressor and an oil-free dry screw compressor?

A: Reciprocating Air Compressor (KORW): Advantages include lower initial investment, rugged and durable construction, strong tolerance to harsh operating conditions (e.g., voltage fluctuations, intake air temperature), widely available maintenance knowledge, and low spare parts costs.

Screw Compressor (e.g., oil-free medium-pressure type): Advantages include smaller noise and vibration, larger and adjustable air output, typically higher energy efficiency, making it more suitable for modern, large-scale, continuous production workshops.

The choice depends on investment budget, air demand, site conditions, and noise sensitivity.

Q: What are the cooling water requirements for a water-cooled piston compressor?

A: Clean, softened water or circulating cooling water is required. Recommended inlet water temperature is ≤32°C (90°F), with pressure between 0.2-0.4 MPa (29-58 psi). Water quality must meet equipment requirements to prevent scaling. KIMAIR can provide a complete solution including a supporting circulating water cooling system (e.g., closed cooling tower) to ensure the machine operates efficiently and reliably at optimal temperatures.

Why choose the KIMAIR KORW Series?

- Time-Tested Classic Reliability: Decades of industry application history prove its robust and durable quality. It is the reliable choice when "stability is paramount."

- Ultimate Investment Value: Provides an optimal balance of initial investment and long-term operating costs while meeting oil-free requirements.

- Deep-Seated Industry Understanding: Specifically designed for the bottle blowing process, with precise pressure and air capacity matching. The maintenance system perfectly aligns with industry practices.

- Comprehensive Service & Spare Parts Network: As a classic model, spare parts are readily available, and service engineers are highly experienced, ensuring worry-free operation.