Roots Blower Supplier in Chandrapur

What Is a Roots Blower?

A roots blower is a positive displacement rotary machine that uses two or three lobed rotors to trap and move a fixed volume of air from the inlet to the outlet side on each revolution. The term "roots blower" comes from the Roots brothers who patented the design in the 1860s, and it has since become a generic industry term for all positive displacement lobe-type blowers. In modern usage, roots blowers and twin lobe blowers refer to essentially the same category of machine, though the term "roots blower" is more prevalent in heavy industrial contexts — cement, power, and steel — while "twin lobe blower" is common in water treatment applications.

As a roots blower supplier in Chandrapur, JBM Equipments serves the dense industrial belt around Chandrapur, Warora, Ballarpur, and Tadali, where cement plants, thermal power stations, and steel processing units create sustained demand for reliable air blowing equipment.

Roots Blower vs Twin Lobe Blower — What Is the Difference?

In strict engineering terms, a roots blower and a twin lobe blower are the same machine — both use two counter-rotating lobed rotors to deliver air. The difference lies primarily in terminology and, in some cases, the number of lobes:

• Twin lobe (bi-lobe) — two-lobed rotors. Standard for most applications up to 1.0 kg/cm2. Simpler to manufacture, cost-effective, widely available.
• Tri-lobe (three-lobe) — three-lobed rotors delivering 33% less pulsation per revolution compared to twin lobe. Preferred for noise-sensitive applications and higher pressures (up to 2.0 kg/cm2). Also referred to as a "roots blower" in many industrial contexts.

Both configurations are available from JBM Equipments. For a detailed guide on the twin lobe blower range available in Aurangabad, including Everest brand specifications, see our dedicated article.

Working Principle

The roots blower operates on a simple trapping-and-displacement cycle:

1. Suction phase — as one rotor lobe sweeps past the inlet port, it creates an expanding cavity on the suction side. Atmospheric air rushes in to fill this cavity.
2. Transfer phase — the trapped air pocket is carried between the rotor lobe and the casing wall from the inlet side to the outlet side. The volume remains constant during transfer.
3. Discharge phase — as the rotor lobe passes the outlet port, the trapped air is exposed to the higher-pressure discharge side. Backflow from the discharge line compresses the air in the pocket, and the continuing rotation pushes it out.

This backflow compression at the outlet is a distinguishing characteristic of roots blowers. Unlike a screw compressor that compresses internally, the roots blower delivers air at suction conditions and compression happens only at the discharge port. This makes roots blowers less efficient at higher pressure ratios but extremely reliable for low-pressure air delivery (below 1.0 kg/cm2 gauge).

Applications in Chandrapur Industries

Chandrapur district is one of Maharashtra's most industrialised regions, with a concentration of heavy industries that depend on reliable air blowing systems:

Cement Plants

The Chandrapur-Warora belt hosts multiple cement manufacturing units. Roots blowers are used for cement silo fluidisation (aerating stored cement to maintain flow during loading and unloading), pneumatic conveying of raw meal and finished cement through pipelines, and kiln seal air supply. Typical requirements range from 500 to 3,000 m3/hr at 0.4 to 0.8 kg/cm2.

Thermal Power Stations

Chandrapur Super Thermal Power Station (CSTPS) and other generating units in the district use roots blowers for ash handling — dry fly ash is conveyed pneumatically from electrostatic precipitator (ESP) hoppers to ash silos. Dense phase conveying systems operate at pressures up to 2.0 kg/cm2, requiring heavy-duty tri-lobe blowers. Additional applications include instrument air backup and boiler bed fluidisation in circulating fluidised bed (CFB) boilers.

Steel and Ferro-Alloy Mills

Sponge iron, ferro-manganese, and steel rolling mills in the Chandrapur region use roots blowers for furnace air supply, material handling, and fume extraction systems. The hot and dusty environment demands blowers with enhanced filtration on the inlet and heat-resistant sealing materials.

Effluent Treatment (ETP/STP)

Industrial estates around Chandrapur, including the MIDC at Tadali, operate common effluent treatment plants (CETPs) and individual ETPs. Roots blowers supply aeration air to biological treatment tanks at typical pressures of 0.3 to 0.5 kg/cm2. The constant-volume delivery ensures stable dissolved oxygen levels even as diffuser back pressure changes with fouling.

Paper and Pulp

Paper mills in the Ballarpur area use roots blowers for vacuum applications in forming sections and for air supply in flotation deinking processes. Vacuum roots blowers achieve suction pressures down to -0.5 kg/cm2 gauge.

Specifications and Capacity Range

Roots blowers supplied by JBM Equipments cover the following range:

• Flow capacity — 50 m3/hr to 10,000 m3/hr (free air delivery).
• Pressure (blower mode) — up to 1.0 kg/cm2 (g) for twin lobe, up to 2.0 kg/cm2 (g) for tri-lobe heavy-duty models.
• Vacuum (vacuum pump mode) — up to -500 mbar gauge.
• Speed — 500 to 3,600 RPM depending on frame size. Larger frames run at lower speeds for reduced wear and noise.
• Motor power — 2 HP to 500 HP, with IE3 motors standard and IE4 available on request.
• Drive — V-belt for models up to 75 HP, direct coupling for larger units.
• Noise level — 82 to 98 dB(A) at 1 metre without enclosure. Acoustic enclosures bring this down to 65 to 75 dB(A).

Materials of Construction

• Casing — close-grained cast iron (FG 260 / GG25), precision bored and surface ground. Some heavy-duty models use SG iron (ductile iron) for impact resistance.
• Rotors — alloy steel (EN8 or equivalent), CNC-machined to involute profile, dynamically balanced. Rotor-to-casing clearances are held to 0.10 to 0.15 mm on each side.
• Timing gears — case-hardened alloy steel (20MnCr5 or equivalent), hobbed and shaved for accurate tooth contact. Backlash is adjustable during assembly.
• Bearings — heavy-duty spherical roller bearings (drive end) and cylindrical roller bearings (non-drive end) rated for L10 life of 60,000+ hours.
• Seals — labyrinth seals on air side (non-contact, maintenance-free), lip seals on gear side to prevent oil migration into the air path.
• Shaft — EN8 or EN19 alloy steel, hardened at bearing and seal locations.

Maintenance Requirements

Roots blowers are mechanically simple with few wearing parts, but regular maintenance is essential for reliable operation in the demanding Chandrapur industrial environment:

Routine Checks (Weekly)

• Check oil level in both gear boxes — top up if below the sight glass mid-point.
• Inspect inlet filter element for dust loading — clean or replace if pressure drop exceeds 50 mmWC.
• Check V-belt tension and condition (for belt-driven units) — belts should deflect 10-15 mm under thumb pressure at mid-span.
• Listen for changes in running noise — a sudden increase in pitch or rattle indicates possible gear or bearing issues.

Scheduled Service (Every 3 Months)

• Change gear oil (SAE 90 EP or manufacturer-recommended grade). In Chandrapur's high ambient temperatures (45+ degrees C in summer), oil degrades faster than in temperate climates.
• Check discharge pressure — an unexplained increase suggests downstream blockage or diffuser fouling.
• Measure bearing temperatures with a contact thermometer. Bearing temperature should not exceed 90 degrees C. Rising trend indicates bearing deterioration.
• Check coupling alignment (for direct-coupled units) with a dial indicator or laser.

Major Overhaul (Every 3 to 5 Years)

• Strip the blower, measure all internal clearances, and replace worn components.
• Re-machine or replace rotors if surface scoring is visible.
• Replace all bearings and seals regardless of condition as a preventive measure.
• Reset timing gear backlash and rotor clearances to factory specifications.

JBM Equipments offers blower repair and reconditioning services for all makes and models across the Chandrapur-Warora region.

Energy Efficiency Considerations

Roots blowers are inherently less efficient than screw or turbo blowers at higher pressures because of the backflow compression at the discharge port. However, several strategies can improve system-level energy efficiency:

• Right-sizing — an oversized blower wastes energy through excess airflow that must be vented. Match the blower to the actual (not future maximum) air demand and add capacity in stages as needed.
• VFD speed control — installing a variable frequency drive allows reducing blower speed during low-demand periods. Since power is approximately proportional to speed (for a fixed pressure application), a 20% speed reduction saves roughly 20% energy.
• Inlet air cooling — roots blowers deliver mass flow proportional to volumetric flow. Cooler, denser inlet air delivers more mass flow for the same blower speed, potentially allowing speed reduction.
• Pressure optimisation — every 0.1 kg/cm2 of unnecessary system pressure consumes 5 to 8% additional power. Review diffuser depth, pipe sizing, and valve restrictions to minimise backpressure.
• Leak elimination — compressed air leaks downstream of the blower represent pure waste. A systematic leak audit and repair program typically recovers 10 to 25% of blower energy.

JBM's Supply and Service in Chandrapur

JBM Equipments is headquartered in Warora, Chandrapur district, giving us a geographic advantage in serving the local industrial belt. As a roots blower supplier in Chandrapur, we provide:

• New blower supply — complete packages including blower, motor, baseframe, drive, silencers, NRV, and pressure relief valve, sized for your specific application.
• Replacement blowers — matched to your existing foundation and pipe connections for quick changeover.
• View our roots blower product page for specifications and enquiry.
• Genuine spare parts — rotors, gears, bearings, seals, and silencer elements from leading manufacturers including Everest Blowers.
• On-site service — installation, commissioning, alignment, and troubleshooting across Chandrapur, Warora, Ballarpur, Tadali, and surrounding areas.
• AMC and breakdown support — preventive maintenance contracts with guaranteed response times for industrial equipment in the Chandrapur region.

Contact us at +91 94033 02128 with your air flow, pressure, and application details for a same-day quotation.