Kinney Tuthill T855 & T1055 – Premium Roots Blowers for Demanding Applications
Kinney Tuthill T855 and T1055 Roots blowers are high-performance positive displacement blowers designed for the most demanding industrial applications. These robust blowers deliver reliable, oil-free air or gas compression and are renowned for their durability, efficiency, and low maintenance requirements.
🎯 What are Roots Blowers?
Roots blowers (also called rotary lobe blowers or positive displacement blowers) are rotary machines with two counter-rotating lobed rotors. They provide constant volumetric flow regardless of pressure and can be used for both vacuum and pressure applications.
⚙️ Operating Principle:
- Two synchronized figure-eight-shaped rotors rotate in opposite directions
- Rotors do not touch each other or the housing (non-contact operation)
- Air/gas is trapped between rotors and housing wall
- Air/gas is transported from inlet to outlet without internal compression
- Compression occurs at the outlet when meeting system pressure
- Timing gears ensure precise rotor synchronization
✅ Key Advantages of Roots Blowers:
| 🛢️ Oil-Free Operation |
No oil in the air stream – clean, uncontaminated air/gas |
| 📊 Constant Flow |
Volumetric flow remains constant regardless of pressure variations |
| ⬆️⬇️ Reversible |
Can operate for both pressure and vacuum applications |
| 🔧 Low Maintenance |
Few moving parts, simple design, long service life |
| 💪 Robust Construction |
Designed for continuous 24/7 operation |
| 🌡️ Wide Temperature Range |
Suitable for various operating conditions |
📊 Technical Specifications:
🔷 T855 Roots Blower
| Parameter | Value |
| Flow Rate: |
850 - 1,200 m³/h (depending on speed and pressure) |
| Pressure (Positive): |
up to 1.0 bar (g) |
| Vacuum: |
up to -0.5 bar (500 mbar vacuum) |
| Operating Speed: |
1,500 - 3,600 rpm |
| Power Range: |
15 - 75 kW (depending on pressure and speed) |
| Drive Type: |
Belt drive or direct coupling |
| Cooling: |
Air-cooled or water-cooled |
🔶 T1055 Roots Blower
| Parameter | Value |
| Flow Rate: |
1,050 - 1,500 m³/h (depending on speed and pressure) |
| Pressure (Positive): |
up to 1.0 bar (g) |
| Vacuum: |
up to -0.5 bar (500 mbar vacuum) |
| Operating Speed: |
1,500 - 3,600 rpm |
| Power Range: |
18.5 - 90 kW (depending on pressure and speed) |
| Drive Type: |
Belt drive or direct coupling |
| Cooling: |
Air-cooled or water-cooled |
Available Kinney Tuthill Roots blower models: T855, T1055, Roots blowers, rotary lobe blowers, positive displacement blowers, oil-free blowers, vacuum blowers, pressure blowers, industrial blowers, process air blowers, pneumatic conveying blowers, wastewater aeration blowers, bi-lobe rotors, tri-lobe rotors
🔩 Construction Features:
⚙️ Main Components:
| Component | Material/Design | Features |
| Housing |
High-grade cast iron |
Precision-machined, robust, thermally stable |
| Rotors |
Cast iron or ductile iron |
Dynamically balanced, hardened surface, minimal clearances |
| Timing Gears |
Hardened alloy steel |
Precision ground, oil-bath lubricated, long service life |
| Shafts |
Forged steel |
High strength, precision machined, hardened journals |
| Bearings |
Heavy-duty roller bearings |
Oil-lubricated, designed for continuous operation |
| Shaft Seals |
Mechanical face seals or lip seals |
Reliable sealing, prevents oil contamination of air stream |
| Gear Housing |
Cast iron with oil reservoir |
Separate from air chamber, splash lubrication |
✅ Design Advantages:
- ✓ Non-contact operation – rotors never touch, minimal wear
- ✓ Oil-free air chamber – clean, uncontaminated air/gas
- ✓ Separate gear lubrication – timing gears in isolated oil bath
- ✓ Precision clearances – 0.15-0.30 mm for optimal efficiency
- ✓ Dynamically balanced rotors – low vibration, quiet operation
- ✓ Modular construction – easy maintenance and component replacement
- ✓ Reinforced housing – handles thermal expansion
🏭 Primary Applications:
💨 Pressure Applications (Positive Pressure):
| Application | Description |
| 🚛 Pneumatic Conveying |
Conveying powders, granules, pellets (cement, grain, plastics, chemicals, minerals) |
| 💧 Wastewater Aeration |
Sewage treatment plants, biological treatment, activated sludge process |
| 🐟 Aquaculture Aeration |
Fish farming, shrimp ponds, oxygen enrichment |
| 🔥 Combustion Air |
Burners, incinerators, industrial furnaces, boilers |
| ⚗️ Process Air |
Chemical reactors, fermentation, oxidation processes |
| 💨 Fluidized Beds |
Drying, coating, granulation, gasification |
| 🏗️ Material Handling |
Pneumatic transport systems, silo discharge, loading/unloading |
| 📄 Paper Production |
Vacuum boxes, suction rolls (when used in vacuum mode) |
🌀 Vacuum Applications (Negative Pressure):
| Application | Description |
| 📦 Vacuum Packaging |
Food packaging, pharmaceutical packaging, electronics packaging |
| 🏗️ Material Handling |
Vacuum conveying of powders and granules |
| 📄 Paper & Printing |
Vacuum tables, sheet feeding, paper handling |
| 🪵 Woodworking |
CNC vacuum tables, veneer pressing, panel handling |
| 🏭 Pick & Place |
Automated handling systems, robotic grippers |
| 🧹 Industrial Vacuum |
Central vacuum systems, dust collection |
| 🔧 Clamping & Holding |
Vacuum fixtures, workpiece holding |
🎛️ Drive & Control Options:
🔌 Drive Configurations:
| Drive Type | Advantages | Applications |
| Belt Drive |
Variable speed possible, vibration damping, easy maintenance, quieter operation |
Standard applications, variable flow requirements |
| Direct Coupling |
Compact design, higher efficiency, no belt maintenance |
Constant speed applications, space-limited installations |
| VFD (Variable Frequency Drive) |
Precise flow control, energy savings, soft start, process optimization |
Variable demand processes, energy-critical applications |
⚡ Control Features:
- ✓ Pressure/vacuum switches – automatic on/off control
- ✓ Temperature monitoring – protects against overheating
- ✓ Pressure relief valves – safety against overpressure
- ✓ Inlet filters – protects blower from contaminants
- ✓ Silencers – reduces noise at inlet and outlet
- ✓ Pressure gauges – inlet and outlet monitoring
- ✓ Vibration sensors – condition monitoring
🌡️ Cooling Systems:
💨 Air-Cooled Version:
- ✓ Natural air circulation around housing
- ✓ Cooling fins on housing exterior
- ✓ Suitable for ambient temperatures up to 40°C
- ✓ No water supply required
- ✓ Lower initial cost
- ✓ Best for: Moderate duty cycles, cooler environments
💧 Water-Cooled Version:
- ✓ Water jackets integrated in housing
- ✓ More efficient cooling for heavy-duty operation
- ✓ Allows higher pressure differentials
- ✓ Suitable for continuous 24/7 operation
- ✓ Lower operating temperatures = longer service life
- ✓ Best for: Continuous operation, high pressures, hot environments
🔧 Maintenance & Service:
📅 Maintenance Schedule:
| Task | Interval | Description |
| Daily Inspection |
Daily |
Visual check, listen for unusual noises, check temperature |
| Oil Level Check |
Weekly |
Check gear oil level, top up if necessary |
| Belt Tension Check |
Monthly |
Check and adjust belt tension (for belt-driven units) |
| Inlet Filter Cleaning |
Monthly |
Clean or replace inlet air filter |
| Gear Oil Change |
6-12 months |
Drain and replace timing gear oil |
| Belt Replacement |
12-24 months |
Replace V-belts or timing belts (if worn) |
| Bearing Inspection |
12-24 months |
Check bearings for wear, listen for noise |
| Shaft Seal Inspection |
12-24 months |
Check seals for leakage, replace if necessary |
| Rotor Clearance Check |
2-3 years |
Measure clearances, adjust if necessary |
| Complete Overhaul |
5-10 years |
Full disassembly, replace all wear parts, reassemble, test |
🔧 Common Wear Parts:
- Shaft seals (mechanical face seals)
- Bearings
- Timing gears (if worn)
- V-belts or timing belts
- O-rings and gaskets
- Inlet air filters
- Pressure relief valves
⚠️ Operating Considerations:
🚨 Important Points:
- ⚠️ Never exceed maximum pressure differential (typically 1.0 bar)
- ⚠️ Always use inlet filtration – prevents rotor damage from debris
- ⚠️ Ensure adequate cooling – prevents overheating
- ⚠️ Install pressure relief valve – protects against overpressure
- ⚠️ Maintain proper rotor clearances – prevents contact and damage
- ⚠️ Use specified lubricating oil – ensures proper gear lubrication
- ⚠️ Install vibration isolation – reduces noise transmission
✅ Best Practices:
- ✓ Install inlet and outlet silencers for noise reduction
- ✓ Use flexible connections to reduce vibration transmission
- ✓ Provide adequate ventilation around blower
- ✓ Mount on solid, level foundation
- ✓ Install pressure gauges for monitoring
- ✓ Use VFD for variable demand applications
- ✓ Regular maintenance according to schedule
📊 Performance Characteristics:
📈 T855 Performance Curves:
- At 1,800 rpm: ~850 m³/h at 0.3 bar pressure differential
- At 2,400 rpm: ~1,100 m³/h at 0.5 bar pressure differential
- At 3,000 rpm: ~1,200 m³/h at 0.8 bar pressure differential
- Power consumption increases with pressure and speed
📈 T1055 Performance Curves:
- At 1,800 rpm: ~1,050 m³/h at 0.3 bar pressure differential
- At 2,400 rpm: ~1,350 m³/h at 0.5 bar pressure differential
- At 3,000 rpm: ~1,500 m³/h at 0.8 bar pressure differential
- Higher capacity than T855 for same operating conditions
🔧 Our Service for T855 & T1055 Roots Blowers:
| 🛒 Sales |
New T855 and T1055 Roots blowers with all drive and cooling options |
| 🎯 System Design |
Complete system engineering including piping, controls, accessories |
| ♻️ Complete Overhaul |
Full reconditioning: disassembly, cleaning, part replacement, reassembly, testing |
| ⚙️ Repair |
Rotor resurfacing, bearing replacement, seal replacement, gear repair |
| 📦 Spare Parts |
Comprehensive inventory: seals, bearings, gears, belts, filters |
| 🚗 On-Site Service |
Installation, commissioning, alignment, vibration analysis, troubleshooting |
| 🔍 Performance Testing |
Flow testing, pressure testing, clearance measurements, efficiency analysis |
| 💡 Technical Support |
Application engineering, system optimization, energy audits |
🌟 Why Choose Kinney Tuthill T855 & T1055?
| 🇺🇸 American Quality |
Kinney Tuthill heritage since 1886 – over 135 years of blower technology |
| 💪 Heavy-Duty Construction |
Designed for continuous 24/7 industrial operation |
| 🛢️ Oil-Free Air |
Clean, uncontaminated air/gas delivery |
| 📊 Constant Flow |
Volumetric flow independent of pressure variations |
| 🔧 Low Maintenance |
Simple design, accessible components, long service intervals |
| ⬆️⬇️ Versatile |
Can be used for both pressure and vacuum applications |
| 💰 Cost-Effective |
High efficiency, low operating costs, long service life |
| 🌍 Proven Worldwide |
Thousands of installations in demanding industrial environments |
💡 T855 vs. T1055 – Which to Choose?
✅ Choose T855 When:
- Flow requirement: 850 - 1,200 m³/h
- Moderate capacity sufficient
- Lower initial cost desired
- Smaller installation space available
- Lower power consumption preferred
✅ Choose T1055 When:
- Flow requirement: 1,050 - 1,500 m³/h
- Higher capacity needed
- Process demands more airflow
- Future expansion anticipated
- Better efficiency at higher flows
Need a Kinney Tuthill T855 or T1055 Roots Blower?
Whether T855 blower for moderate capacity applications or T1055 blower for higher flow requirements – our Kinney Tuthill experts are happy to advise you in selecting the optimal Roots blower for your specific process needs.
We provide complete turnkey systems including blower, motor, drive configuration (belt or direct), cooling system (air or water), controls, filtration, silencers, and all necessary accessories – engineered specifically for your application.
We also specialize in complete overhaul and repair of existing T855 and T1055 blowers – restoring them to original factory performance specifications with genuine parts and expert workmanship.
American industrial quality since 1886 – professional local service! Contact us today for expert consultation and reliable Roots blower solutions for your pressure or vacuum application.