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𝗙𝗥𝗘𝗘 𝗦𝗛𝗜𝗣𝗣𝗜𝗡𝗚 𝗜𝗡 𝗟𝗢𝗪𝗘𝗥 𝟰𝟴 𝗦𝗧𝗔𝗧𝗘𝗦 & 𝗡𝗢 𝗦𝗔𝗟𝗘𝗦 𝗧𝗔𝗫
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2-Stage Reciprocating Compressor Pump for Industrial Equipment | 5-7.5 HP | Inline 2-Cylinder | 16.875" Flywheel | Castair

Original price $1,600.00 - Original price $1,600.00
Original price
$1,600.00
$1,600.00 - $1,600.00
Current price $1,600.00
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What Sets Us Apart
12-Month Warranty (Industry-Leading Coverage)
Free Shipping (Lower 48 US States)
• Comes with hoses, fittings, and couplers (Jobsite ready)
  • Two-stage compression design
  • 5-7.5 HP motor compatibility
  • Inline 2-cylinder configuration
  • 16.875-inch flywheel diameter
  • 2-quart oil capacity
  • Cast iron construction
  • Oil splash lubrication
  • Standard mounting pattern
  • Continuous duty rating
  • Reciprocating pump technology
Overview

When you need reliable compressed air power for your operation, the CASTAIR 5-7.5 HP 2-Stage Reciprocating Compressor Pump delivers the performance and durability that professionals demand. This heavy-duty pump features a robust inline 2-cylinder design that maximizes efficiency while minimizing maintenance requirements, making it an ideal choice for contractors, agricultural professionals, and industrial applications.

The two-stage compression design sets this pump apart from single-stage alternatives. Air gets compressed twice through the inline cylinder configuration, resulting in higher pressure output and improved efficiency compared to single-stage units. This means you'll get more usable air pressure for demanding tools and equipment while using less energy to achieve those results.

Built to handle the rigors of professional use, this pump accommodates motors ranging from 5 to 7.5 horsepower. The substantial 16.875-inch outside diameter flywheel provides excellent momentum and smooth operation, reducing vibration and wear on internal components. This larger flywheel design translates directly to longer service life and more consistent performance under load.

The generous 2-quart oil capacity ensures proper lubrication for extended run times without frequent oil changes. Adequate oil capacity is crucial for reciprocating compressor pumps since these units rely on oil splash lubrication to keep pistons, rings, and cylinder walls properly protected. More oil capacity means better heat dissipation and longer intervals between maintenance.

Forge Claw has selected this CASTAIR pump because it consistently delivers the reliability that professional users require. Whether you're running pneumatic tools on a construction site, operating spray equipment for agricultural applications, or powering air-driven machinery in a shop environment, this pump provides the consistent compressed air flow you need to keep working productively.

The inline cylinder configuration offers several advantages over V-style or opposed cylinder designs. Inline cylinders are easier to service, create less vibration during operation, and typically require fewer mounting points for secure installation. This translates to simpler maintenance procedures and more flexible mounting options when integrating the pump into your compressed air system.

Professional contractors appreciate the pump's ability to handle continuous duty applications. The two-stage design runs cooler than single-stage pumps because the air gets partially cooled between compression stages. Cooler operation means less thermal stress on seals, gaskets, and other wear components, resulting in longer service intervals and reduced operating costs over the pump's lifetime.

Agricultural and ranch operations benefit from this pump's robust construction and reliable performance in demanding environments. From powering pneumatic seed drills to operating hydraulic systems and running air tools for equipment maintenance, this pump handles diverse compressed air requirements without missing a beat.

The CASTAIR manufacturing quality ensures consistent performance across varying operating conditions. Temperature fluctuations, dust, humidity, and other environmental factors won't compromise this pump's ability to deliver the compressed air flow your operation depends on. This reliability factor becomes especially important for remote operations where equipment downtime creates significant productivity losses.

Installation flexibility makes this pump suitable for both stationary and portable compressor applications. The standard mounting configuration accommodates most common motor mounting patterns, while the balanced design minimizes installation complexity. Whether you're building a custom stationary system or upgrading an existing portable unit, this pump integrates smoothly into your compressed air setup.

Specifications
  • Motor Compatibility: 5-7.5 HP motors
  • Compression Stages: Two-stage design
  • Cylinder Configuration: 2 inline cylinders
  • Flywheel Outside Diameter: 16.875 inches
  • Oil Capacity: 2 quarts
  • Pump Type: Reciprocating compressor pump
  • Lubrication System: Oil splash lubrication
  • Construction: Cast iron cylinders with steel connecting rods
  • Mounting Style: Standard motor mounting pattern
  • Country of Origin: Manufactured by Castair
Features
  • Two-Stage Compression Design — Provides higher pressure output and improved efficiency compared to single-stage pumps while running cooler and reducing thermal stress on components
  • Inline 2-Cylinder Configuration — Delivers smooth operation with reduced vibration, simplified maintenance access, and flexible mounting options for various installation requirements
  • 5-7.5 HP Motor Compatibility — Accommodates a wide range of motor sizes for optimal matching to your specific compressed air flow and pressure requirements
  • 16.875-Inch Flywheel Diameter — Large flywheel provides excellent momentum and energy storage for consistent operation and reduced wear on internal components
  • 2-Quart Oil Capacity — Generous oil reservoir ensures proper lubrication during extended run times while providing better heat dissipation and longer maintenance intervals
  • Reciprocating Pump Design — Time-proven technology delivers reliable performance with readily available replacement parts and straightforward maintenance procedures
  • Cast Iron Construction — Durable materials withstand demanding operating conditions while providing excellent heat dissipation and dimensional stability
  • Standard Mounting Pattern — Compatible with most common motor mounting configurations for simplified installation and replacement applications
Benefits

The two-stage compression design significantly reduces operating costs compared to single-stage alternatives. By compressing air in two stages with intercooling, this pump achieves higher pressures while using less energy per cubic foot of compressed air produced. This efficiency advantage translates directly to lower electricity costs and reduced strain on your electrical system, especially important for operations running compressors for extended periods.

Maintenance requirements stay manageable thanks to the pump's robust construction and generous oil capacity. The 2-quart oil reservoir means longer intervals between oil changes, while the inline cylinder design provides easy access to wear components when service is needed. Fewer maintenance stops mean more productive hours and lower long-term operating costs for your compressed air system.

Durability advantages become apparent quickly in demanding applications. The large flywheel stores momentum energy that smooths out pressure pulses and reduces stress on drive components, while the cast iron construction dissipates heat effectively to prevent overheating. These design elements work together to deliver years of reliable service even under continuous duty conditions that would challenge lesser pumps.

Productivity improvements come from the pump's ability to maintain consistent pressure output regardless of air demand fluctuations. The two-stage design responds well to varying loads, maintaining steady pressure for pneumatic tools and equipment that require consistent air flow to operate effectively. This reliability means less downtime waiting for pressure recovery and more time focused on productive work.

Installation flexibility saves time and reduces complexity when setting up or upgrading compressed air systems. The standard mounting pattern works with most motor configurations, while the balanced inline design minimizes vibration that could require special mounting provisions. Whether you're replacing an existing pump or building a new system, installation proceeds smoothly without unexpected complications.

Long-term value comes from the pump's serviceability and parts availability. Reciprocating compressor pumps use well-established technology with readily available replacement components, meaning you won't face obsolescence issues or expensive proprietary parts down the road. This serviceability factor makes the pump a sound investment for operations planning to use compressed air systems for many years.

Performance consistency across different operating conditions ensures reliable compressed air supply regardless of ambient temperature, humidity, or altitude variations. This stability becomes especially valuable for agricultural operations, construction sites, and other applications where environmental conditions change seasonally or the compressor operates in different locations throughout the year.

Additional Information

This pump excels in applications requiring moderate to high air pressure with consistent flow rates. Construction contractors will find it ideal for powering pneumatic nail guns, impact wrenches, and spray equipment, while agricultural professionals can use it for operating pneumatic seed drills, grain handling equipment, and livestock facility automation systems. The pump also works well in shop environments for powering air tools, tire inflation systems, and paint spray equipment.

Motor selection significantly impacts pump performance and longevity. Choose motors with adequate horsepower reserves to prevent overloading during peak demand periods, and ensure the motor's duty cycle matches your intended usage pattern. Electric motors should provide consistent speed regulation, while gas or diesel engines need governors that maintain steady RPM under varying loads for optimal pump performance.

Operating practices that extend pump life include warming up the system gradually during cold weather starts, monitoring oil levels regularly, and avoiding prolonged operation above maximum rated pressure. Keep air intake filters clean to prevent contamination, and ensure adequate ventilation around the pump to promote heat dissipation. Regular oil analysis can identify potential issues before they cause expensive component failures.

Routine maintenance keeps this pump running efficiently for thousands of hours. Check oil levels before each use and change oil according to the manufacturer's schedule or when oil analysis indicates contamination. Inspect belts for proper tension and wear, clean air filters regularly, and monitor discharge temperatures to ensure the cooling system functions properly. Address unusual noises or vibrations promptly to prevent minor issues from becoming major repairs.

Warranty Info

Manufactured by Castair, this product is covered under the manufacturer's standard warranty for defects in materials and workmanship. Contact Forge Claw for full warranty details and authorized service options. Order your CASTAIR | 5-7.5 HP 2-Stage Recip. Comp. Pump w/ Oil | Inline 2-Cylinder | Flywheel O.D. 16.875 In. from Forge Claw today. Multiple financing options are available for qualified buyers.

What CFM and PSI does this compressor deliver?

This is a reciprocating compressor pump that requires pairing with an appropriate motor and tank system to determine final CFM and PSI output. The two-stage design typically delivers higher pressure capabilities than single-stage units, often reaching 175 PSI or higher when properly configured. CFM output depends on the motor horsepower selected, tank size, and operating pressure requirements. A 5 HP motor configuration typically produces 15-18 CFM at 175 PSI, while a 7.5 HP setup can deliver 25-30 CFM at similar pressures.

The inline 2-cylinder configuration ensures consistent air delivery with minimal pulsation. For precise CFM and PSI specifications for your intended application, consider factors like duty cycle, ambient temperature, and altitude which all affect compressor performance. The two-stage compression design provides better efficiency at higher pressures compared to single-stage alternatives. Forge Claw offers multiple financing options for qualified buyers.

What air tools can I run with this compressor?

This compressor pump can power a wide range of pneumatic tools when properly configured with an appropriate motor and tank system. The two-stage design provides excellent pressure stability for demanding applications including impact wrenches, air ratchets, die grinders, and spray guns. Construction professionals can operate framing nailers, roofing nailers, and pneumatic staplers effectively. Agricultural applications include powering pneumatic seed drills, spray equipment, and various farm implement air systems.

The higher pressure capability handles air tools requiring 90-175 PSI operating pressure. Continuous duty rating makes it suitable for shop environments running multiple tools simultaneously or single tools with high duty cycles. The smooth operation from the inline cylinder design reduces pressure fluctuations that can affect tool performance. Paint spraying, sandblasting with appropriate tank volume, and powering air-driven hydraulic pumps are all within this pump's capabilities when matched with proper motor horsepower and tank capacity.

Is this compressor portable enough for job sites?

This is a reciprocating compressor pump that requires integration with a motor, tank, and mounting system to create a complete compressor unit. Portability depends entirely on how you configure the complete system. The pump itself is designed for both stationary and portable applications with flexible mounting options. Many contractors build this pump into wheeled portable units for job site mobility, while others mount it permanently in shop locations.

The standard motor mounting pattern accommodates various motor types and sizes, allowing customization for portability needs. For job site use, consider pairing with a smaller tank and electric motor for lighter weight, or a gas engine setup for remote locations without electrical power. The inline cylinder configuration creates a more compact profile than V-style pumps, helping with portable system packaging. The robust cast iron construction handles transport vibration and job site conditions well.

What maintenance does this compressor require?

Regular maintenance ensures reliable operation and extends service life of this reciprocating compressor pump. Check and change the oil regularly using the 2-quart capacity as a guide - initial oil change after first 50 hours, then every 500-1000 hours depending on operating conditions. Monitor oil level weekly during regular use and check for contamination or unusual color changes. The oil splash lubrication system requires proper oil viscosity for your operating temperature range.

Inspect and clean the air intake filter regularly, replacing when dirty or damaged to prevent contamination. Check valve operation annually and replace reed valves or plate valves as wear patterns develop. Examine connecting rods, pistons, and cylinder walls during major service intervals for wear or scoring. The cast iron construction handles normal wear well but requires attention to lubrication systems. Clean cooling fins and external surfaces to maintain proper heat dissipation.

How does tank size affect how long I can run tools continuously?

Tank size significantly impacts tool runtime and compressor cycling frequency with this reciprocating pump. Larger tanks store more compressed air, allowing longer continuous tool operation before the compressor needs to restart. A 60-gallon tank provides substantially more reserve air than a 30-gallon unit, reducing compressor on-time and extending equipment life. The two-stage design efficiently refills tanks but benefits from adequate storage capacity to handle peak demand periods.

For intermittent tool use, larger tanks mean fewer start cycles and more consistent pressure delivery. Continuous high-demand applications like spray guns or sandblasting require substantial tank volume to maintain steady pressure without constant compressor operation. Calculate your tool's CFM requirements against the pump's output capacity and tank size to determine sustainable runtime. The inline cylinder configuration provides steady air delivery but still benefits from tank buffering for smooth tool operation.

Overview

When you need reliable compressed air power for your operation, the CASTAIR 5-7.5 HP 2-Stage Reciprocating Compressor Pump delivers the performance and durability that professionals demand. This heavy-duty pump features a robust inline 2-cylinder design that maximizes efficiency while minimizing maintenance requirements, making it an ideal choice for contractors, agricultural professionals, and industrial applications.

The two-stage compression design sets this pump apart from single-stage alternatives. Air gets compressed twice through the inline cylinder configuration, resulting in higher pressure output and improved efficiency compared to single-stage units. This means you'll get more usable air pressure for demanding tools and equipment while using less energy to achieve those results.

Built to handle the rigors of professional use, this pump accommodates motors ranging from 5 to 7.5 horsepower. The substantial 16.875-inch outside diameter flywheel provides excellent momentum and smooth operation, reducing vibration and wear on internal components. This larger flywheel design translates directly to longer service life and more consistent performance under load.

The generous 2-quart oil capacity ensures proper lubrication for extended run times without frequent oil changes. Adequate oil capacity is crucial for reciprocating compressor pumps since these units rely on oil splash lubrication to keep pistons, rings, and cylinder walls properly protected. More oil capacity means better heat dissipation and longer intervals between maintenance.

Forge Claw has selected this CASTAIR pump because it consistently delivers the reliability that professional users require. Whether you're running pneumatic tools on a construction site, operating spray equipment for agricultural applications, or powering air-driven machinery in a shop environment, this pump provides the consistent compressed air flow you need to keep working productively.

The inline cylinder configuration offers several advantages over V-style or opposed cylinder designs. Inline cylinders are easier to service, create less vibration during operation, and typically require fewer mounting points for secure installation. This translates to simpler maintenance procedures and more flexible mounting options when integrating the pump into your compressed air system.

Professional contractors appreciate the pump's ability to handle continuous duty applications. The two-stage design runs cooler than single-stage pumps because the air gets partially cooled between compression stages. Cooler operation means less thermal stress on seals, gaskets, and other wear components, resulting in longer service intervals and reduced operating costs over the pump's lifetime.

Agricultural and ranch operations benefit from this pump's robust construction and reliable performance in demanding environments. From powering pneumatic seed drills to operating hydraulic systems and running air tools for equipment maintenance, this pump handles diverse compressed air requirements without missing a beat.

The CASTAIR manufacturing quality ensures consistent performance across varying operating conditions. Temperature fluctuations, dust, humidity, and other environmental factors won't compromise this pump's ability to deliver the compressed air flow your operation depends on. This reliability factor becomes especially important for remote operations where equipment downtime creates significant productivity losses.

Installation flexibility makes this pump suitable for both stationary and portable compressor applications. The standard mounting configuration accommodates most common motor mounting patterns, while the balanced design minimizes installation complexity. Whether you're building a custom stationary system or upgrading an existing portable unit, this pump integrates smoothly into your compressed air setup.

Specifications
  • Motor Compatibility: 5-7.5 HP motors
  • Compression Stages: Two-stage design
  • Cylinder Configuration: 2 inline cylinders
  • Flywheel Outside Diameter: 16.875 inches
  • Oil Capacity: 2 quarts
  • Pump Type: Reciprocating compressor pump
  • Lubrication System: Oil splash lubrication
  • Construction: Cast iron cylinders with steel connecting rods
  • Mounting Style: Standard motor mounting pattern
  • Country of Origin: Manufactured by Castair
Features
  • Two-Stage Compression Design — Provides higher pressure output and improved efficiency compared to single-stage pumps while running cooler and reducing thermal stress on components
  • Inline 2-Cylinder Configuration — Delivers smooth operation with reduced vibration, simplified maintenance access, and flexible mounting options for various installation requirements
  • 5-7.5 HP Motor Compatibility — Accommodates a wide range of motor sizes for optimal matching to your specific compressed air flow and pressure requirements
  • 16.875-Inch Flywheel Diameter — Large flywheel provides excellent momentum and energy storage for consistent operation and reduced wear on internal components
  • 2-Quart Oil Capacity — Generous oil reservoir ensures proper lubrication during extended run times while providing better heat dissipation and longer maintenance intervals
  • Reciprocating Pump Design — Time-proven technology delivers reliable performance with readily available replacement parts and straightforward maintenance procedures
  • Cast Iron Construction — Durable materials withstand demanding operating conditions while providing excellent heat dissipation and dimensional stability
  • Standard Mounting Pattern — Compatible with most common motor mounting configurations for simplified installation and replacement applications
Benefits

The two-stage compression design significantly reduces operating costs compared to single-stage alternatives. By compressing air in two stages with intercooling, this pump achieves higher pressures while using less energy per cubic foot of compressed air produced. This efficiency advantage translates directly to lower electricity costs and reduced strain on your electrical system, especially important for operations running compressors for extended periods.

Maintenance requirements stay manageable thanks to the pump's robust construction and generous oil capacity. The 2-quart oil reservoir means longer intervals between oil changes, while the inline cylinder design provides easy access to wear components when service is needed. Fewer maintenance stops mean more productive hours and lower long-term operating costs for your compressed air system.

Durability advantages become apparent quickly in demanding applications. The large flywheel stores momentum energy that smooths out pressure pulses and reduces stress on drive components, while the cast iron construction dissipates heat effectively to prevent overheating. These design elements work together to deliver years of reliable service even under continuous duty conditions that would challenge lesser pumps.

Productivity improvements come from the pump's ability to maintain consistent pressure output regardless of air demand fluctuations. The two-stage design responds well to varying loads, maintaining steady pressure for pneumatic tools and equipment that require consistent air flow to operate effectively. This reliability means less downtime waiting for pressure recovery and more time focused on productive work.

Installation flexibility saves time and reduces complexity when setting up or upgrading compressed air systems. The standard mounting pattern works with most motor configurations, while the balanced inline design minimizes vibration that could require special mounting provisions. Whether you're replacing an existing pump or building a new system, installation proceeds smoothly without unexpected complications.

Long-term value comes from the pump's serviceability and parts availability. Reciprocating compressor pumps use well-established technology with readily available replacement components, meaning you won't face obsolescence issues or expensive proprietary parts down the road. This serviceability factor makes the pump a sound investment for operations planning to use compressed air systems for many years.

Performance consistency across different operating conditions ensures reliable compressed air supply regardless of ambient temperature, humidity, or altitude variations. This stability becomes especially valuable for agricultural operations, construction sites, and other applications where environmental conditions change seasonally or the compressor operates in different locations throughout the year.

Additional Information

This pump excels in applications requiring moderate to high air pressure with consistent flow rates. Construction contractors will find it ideal for powering pneumatic nail guns, impact wrenches, and spray equipment, while agricultural professionals can use it for operating pneumatic seed drills, grain handling equipment, and livestock facility automation systems. The pump also works well in shop environments for powering air tools, tire inflation systems, and paint spray equipment.

Motor selection significantly impacts pump performance and longevity. Choose motors with adequate horsepower reserves to prevent overloading during peak demand periods, and ensure the motor's duty cycle matches your intended usage pattern. Electric motors should provide consistent speed regulation, while gas or diesel engines need governors that maintain steady RPM under varying loads for optimal pump performance.

Operating practices that extend pump life include warming up the system gradually during cold weather starts, monitoring oil levels regularly, and avoiding prolonged operation above maximum rated pressure. Keep air intake filters clean to prevent contamination, and ensure adequate ventilation around the pump to promote heat dissipation. Regular oil analysis can identify potential issues before they cause expensive component failures.

Routine maintenance keeps this pump running efficiently for thousands of hours. Check oil levels before each use and change oil according to the manufacturer's schedule or when oil analysis indicates contamination. Inspect belts for proper tension and wear, clean air filters regularly, and monitor discharge temperatures to ensure the cooling system functions properly. Address unusual noises or vibrations promptly to prevent minor issues from becoming major repairs.

Warranty Info

Manufactured by Castair, this product is covered under the manufacturer's standard warranty for defects in materials and workmanship. Contact Forge Claw for full warranty details and authorized service options. Order your CASTAIR | 5-7.5 HP 2-Stage Recip. Comp. Pump w/ Oil | Inline 2-Cylinder | Flywheel O.D. 16.875 In. from Forge Claw today. Multiple financing options are available for qualified buyers.