Pumps for Asphalt Plants & Thermal Oil Circulation
Turnkey fluid handling suites engineered for road construction EPCs, asphalt mixing plants, and industrial thermal fluid heating loops. Zero water-cooling piping required.
Severe Working Conditions & Engineering Demands
| Key Parameter | Process Value | Engineering Implication |
|---|---|---|
| Operating Temperature Range | 150°C – 350°C (302°F – 662°F) | Requires natural heat-dissipating housing and high-temp fluoroelastomer or metal bellows seals. |
| Fluid Viscosity Spectrum | 1.0 cSt (Thermal Oil at 300°C) to 10,000 cSt (Cold Bitumen / Modified Asphalt) | Requires dual-pump strategy: centrifugal for thin hot oil, positive displacement gear for heavy viscous bitumen. |
| Cold-Start Solidification Risk | Penetration Grade 60/70 & Polymer Modified Bitumen (PMB) solidifies below 100°C | Heating jackets on casing, front cover, and stuffing box are mandatory to melt cold bitumen before motor start. |
System Flow Stages & Pump Allocations
Bitumen Tanker Offloading
Rapid unloading of hot liquid bitumen (160°C) from road tankers into bulk storage tanks.
Thermal Fluid Circulation Loop
Continuous closed-loop pumping of 250°C–320°C thermal oil from boiler through jacketed tanks and piping.
Bitumen Metering to Mixing Pugmill
High-precision volumetric injection of hot bitumen into aggregate batch mixing drum.
Burner Heavy Fuel Injection
Pulsation-free high-pressure boost feeding of heavy fuel oil / pyrolysis oil to the dryer drum burner.
Process Pitfalls vs Orbi Pump Engineered Solutions
Bitumen freezes and locks pump rotors after overnight shutdowns
RCB & LCB full-enclosure thermal jackets allow hot oil or steam preheating for 30 minutes to reliquefy all trapped bitumen before motor ignition.
Water-cooled pumps cause dangerous thermal shock and oil-water explosion hazards
RY air-cooled pumps utilize external heat dissipation fins and a lengthened isolation bracket, operating up to 350°C with zero water piping.
Pressure fluctuations cause uneven burner combustion and black smoke
3G three-screw pumps deliver continuous, linear, non-pulsating fuel flow at up to 2.5 MPa, ensuring steady atomization and clean combustion.
Core Pumps Engineered for this Duty
RY Air-Cooled Hot Oil Centrifugal Pump (RY Series)
RCB Jacketed Asphalt Gear Pump (RCB Series)
LCB Fully-Jacketed Heavy-Duty Gear Pump (LCB Series)
3G Triple Screw Pump (3G Series)
Frequently Asked Engineering Questions
Why choose an air-cooled hot oil pump over water-cooled models in asphalt plants?
Water-cooled pumps require dedicated cooling water chillers and piping that frequently freeze in winter or leak. A water leak into a 300°C thermal oil system instantly flashes into steam, causing disastrous pressure surges and fires. RY air-cooled pumps completely eliminate water circuits by dissipating heat naturally.
What heating media can be circulated through RCB jacketed bitumen pumps?
Both high-temperature thermal oil (up to 300°C) and saturated steam (up to 1.0 MPa) can be used. The jackets are cast directly into the pump casing and covers, rated for internal pressure up to 1.0 MPa.
How to prevent bitumen pump shaft seal leakage during thermal expansion?
We provide high-density carbon graphite packing or welded metal bellows mechanical seals. The gland includes an independent thermal buffer space to protect packing rings from heat embrittlement.
Can you provide complete pump packages including flameproof motors and skid baseplates?
Yes. We deliver fully assembled pump sets including cast iron or fabricated steel baseplates, pin-bush flexible couplings, coupling guards, and ATEX/IECEx/ExdIIBT4 explosion-proof high-efficiency motors.
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