TRP Air-Cooled Roots Vacuum Pump - High-Efficiency Oil-Free Vacuum Solution

The TRP series air-cooled Roots vacuum pumps adopt advanced oil-free design with features including high pumping speed, excellent ultimate vacuum, and compact structure. Widely used in vacuum coating, heat treatment, metallurgy, and power equipment fields. This article details TRP vacuum pump specifications, working principles, product features and application cases.

Working Principle

Basic Operation Mechanism

The TRP series Roots vacuum pump features two figure-8 shaped rotors mounted perpendicularly on parallel shafts, driven by a pair of gears with 1:1 transmission ratio for counter-rotating synchronous movement. Maintaining precise clearance between rotors and between rotors and pump chamber walls enables high-speed gas intake and exhaust processes.

When rotors are at positions I and II, the intake side volume increases; at position III, part of the volume is isolated from the intake side; at position IV, this volume opens to the exhaust side; further rotation discharges gas through the exhaust port. Each full rotation completes this cycle twice.

Pressure Differential Control

The pressure differential between intake and exhaust ports is limited. The TRP series incorporates a bypass valve between ports that automatically opens when pressure differential reaches a set value, allowing partial gas to recirculate from exhaust to intake, reducing load on both the Roots pump and backing pump during high pressure conditions while enabling simultaneous startup without overload.

System Configuration

Roots pumps cannot operate alone and must be combined with backing pumps (rotary vane pumps, sliding vane pumps, water ring pumps, etc.) to form a Roots pump unit. For higher vacuum requirements, two Roots pumps can be connected in series to form a three-stage pumping system.

TRP Roots pump parameter table：

TRP Roots pump size table：

Product Features

Oil-Free Operation: No friction between rotors and chamber walls requires no lubrication, eliminating oil contamination in vacuum systems.

Compact & Flexible Installation: Space-saving design allows horizontal or vertical mounting.

Stable & Quiet Performance: Excellent dynamic balance ensures smooth operation with minimal vibration and noise.

Condensable Gas Handling: Capable of pumping condensable gases.

Quick Start-Up: Rapidly achieves ultimate vacuum pressure.

Energy Efficient: Low power consumption reduces operating costs.

Safe & Reliable: Integrated bypass valve provides automatic overload protection.

Applications

The TRP air-cooled Roots vacuum pump is ideal for vacuum systems requiring high pumping speeds at low inlet pressures, serving as either main or backing pump. Widely used in:

Food Industry: Freeze drying, vacuum packaging

Chemical Industry: Vacuum distillation, concentration, evaporation

Pharmaceutical Industry: Vacuum drying, sterilization

Textile Industry: Vacuum dehydration, shaping

Industrial Manufacturing: Vacuum metallurgy, coating, heat treatment, impregnation, dust removal

Case Studies

Case 1: Vacuum Coating Line Upgrade

An optical coating manufacturer replaced oil-sealed vacuum pumps with TRP-500 units, eliminating oil contamination while reducing pump-down time by 30% and improving coating uniformity by 15%, with annual maintenance savings of approximately ¥50,000.

Case 2: Metallurgical Vacuum Heat Treatment

A specialty steel producer implemented a TRP-1000 system with sliding vane pumps achieving stable 0.3Pa ultimate vacuum at 1300°C, significantly improving product consistency and increasing output by 20%.

Case 3: Large Power Equipment Impregnation

A transformer manufacturer uses TRP-2000 systems for vacuum pressure impregnation (VPI) of large coils, achieving international-standard penetration uniformity and raising product yield from 92% to 98.5%.

TRP Air-Cooled Roots Vacuum Pump FAQ

Q1: Why can't TRP Roots pumps operate alone?
A: Their working principle requires a backing pump to provide initial vacuum. Solo operation cannot achieve required vacuum levels and may cause motor overload.

Q2: What ultimate vacuum can TRP pumps achieve?
A: Approximately 100Pa alone; ≤0.5Pa when properly paired with backing pumps like oil-sealed mechanical pumps.

Q3: Do air-cooled Roots pumps need additional cooling?
A: TRP series' efficient air cooling requires no extra systems under normal conditions. Consider enhanced ventilation or water cooling for high-temperature environments or continuous heavy loads.

Q4: What is rotor-to-chamber clearance? How to address increased clearance?
A: Standard clearance is 0.1-0.15mm. Professional adjustment or rotor replacement is needed when wear exceeds 0.3mm, as performance degrades significantly.

Q5: Can TRP pumps handle corrosive gases?
A: Standard models aren't suitable. Consult technicians for special corrosion-resistant versions (e.g., stainless steel construction) when pumping aggressive media.

Q6: What causes excessive operational noise?
A: Potential causes include: bearing wear, rotor imbalance, coupling misalignment, clogged intake filters, or insecure mounting. Immediate inspection is recommended.

Q7: Is frequent bypass valve activation normal?
A: No. This typically indicates insufficient backing pump capacity or excessive system leakage, requiring configuration review and leak checking.

Q8: What routine maintenance does TRP require?
A: Includes: regular oil level checks (gear box), intake filter cleaning, belt tension inspection (for belt-driven models), abnormal noise monitoring, and operational parameter recording.

Q9: Why might the pump fail to evacuate after startup?
A: Possible reasons: motor reverse rotation, blocked intake line/closed valve, backing pump malfunction, or major system leaks. Systematic troubleshooting is necessary.

Q10: Any altitude considerations for TRP operation?
A: Higher altitudes reduce cooling efficiency and motor power. Above 1000m, consider derating or special designs - consult factory technicians.

This comprehensive guide provides thorough understanding of TRP air-cooled Roots vacuum pumps. Contact our technical team for additional specifications or customized solutions. The TRP series has become preferred equipment for industrial vacuum systems worldwide due to its outstanding performance and reliability.