DGU Glass — Duratuf Glass

dgu-glass-double-glazed-units

When you step inside a modern bus, railway coach, or heavy vehicle, the comfort you experience inside depends on many factors. One of the most important yet often overlooked is the glass in the windows. At Duratuf Glass, we manufacture high-quality DGU Glass — Double Glazed Units — that keep passengers comfortable, reduce noise, and improve energy efficiency.

If you are looking for Industrial Vehicle Glass Solutions India or need reliable Automotive Glass Suppliers in Haryana, this page covers everything you need to know about our DGU Glass, how it works, and why vehicle manufacturers and fleet operators across the country trust Duratuf.

What Is DGU Glass?

DGU Glass, or Double Glazed Unit Glass, is a type of insulating glass made by combining two or more glass panes with a gap between them. The space between the panes is filled with air or an insulating gas like Argon or Krypton. The edges are sealed with a spacer and a desiccant to keep the cavity dry and free from moisture.

This construction creates a barrier that reduces heat transfer, blocks outside noise, and prevents condensation. DGU Glass is widely used in vehicles, railway coaches, and buildings where thermal comfort and noise reduction are essential.

How DGU Glass Works — A Quick Overview

Component	Material / Feature	Role in Performance
Outer Glass Pane	Toughened or Laminated Glass	Provides structural strength and impact resistance
Inner Glass Pane	Toughened or Laminated Glass	Adds strength and prevents interior damage
Spacer	Aluminum or Steel with Desiccant	Maintains gap, removes moisture from cavity
Gas Fill	Argon / Krypton / Air	Reduces heat transfer, improves insulation
Primary Seal	Polyisobutylene	Prevents gas leakage
Secondary Seal	Polysulfide / Silicone	Provides structural strength and weather resistance

Benefits of DGU Glass

Thermal Insulation

DGU Glass significantly reduces heat transfer between the inside and outside of a vehicle. In summer, it keeps the interior cooler by blocking outside heat. In winter, it traps warmth inside. This means the air-conditioning or heating system does not have to work as hard, which saves fuel and reduces operating costs.

Noise Reduction

The double layer of glass and the gas-filled cavity work together to block outside noise. DGU Glass can reduce noise by 25 to 35 decibels, especially the low-frequency noise from traffic and engines. For passengers on long journeys, this means a quieter, more relaxing ride.

Condensation Control

The desiccant inside the spacer keeps the cavity dry. This prevents fogging and condensation from forming on the inside of the glass when there is a large temperature difference between the inside and outside of the vehicle. Clear windows mean better visibility and safer driving.

UV Ray Protection

DGU Glass blocks a significant portion of harmful ultraviolet rays. This protects passengers from sun exposure and also prevents the vehicle’s interior upholstery from fading over time.

Energy Efficiency

By reducing the need for heating and cooling, DGU Glass helps lower fuel consumption. For fleet operators, this translates to real cost savings over the life of each vehicle.

Applications of Duratuf DGU Glass

Buses and Coaches

Modern buses and luxury coaches use DGU Glass to keep passengers comfortable on long journeys. The thermal insulation reduces the load on the air-conditioning system, while the noise reduction makes the ride more pleasant.

Railway Coaches

Indian Railways has increasingly adopted DGU Glass for AC coaches, including LHB coaches and premium trains like Vande Bharat. The glass helps maintain the interior temperature and reduces the noise from tracks and external traffic.

Metro and City Trains

Urban rail systems require glass that can handle daily use while keeping passengers comfortable. DGU Glass provides the durability and insulation needed for metro and city train applications.

Heavy Vehicles

For trucks, construction equipment, and heavy vehicles, DGU Glass offers strength and insulation for demanding conditions. Duratuf supplies DGU Glass for a wide range of heavy vehicle applications.

Types of DGU Glass We Manufacture

Clear DGU Glass

Standard clear glass panels that provide excellent visibility while offering thermal and acoustic insulation. Used in most bus and railway coach applications.

Tinted DGU Glass

Tinted glass reduces glare and solar heat gain while maintaining insulation properties. Ideal for vehicles operating in sunny conditions.

Laminated DGU Glass

Laminated glass includes a PVB interlayer that holds the glass together if it breaks. This adds an extra layer of safety for passengers.

Tempered DGU Glass

Tempered glass is heat-treated for increased strength. When it breaks, it shatters into small pieces, reducing the risk of injury.

Technical Specifications

Feature	Specification
Glass Panes	2 or more panes (toughened / laminated)
Glass Thickness	4mm to 12mm per pane
Cavity Width	6mm to 20mm
Gas Fill	Argon, Krypton, or Dry Air
Spacer Material	Aluminum / Stainless Steel / Warm Edge
Desiccant	Molecular Sieve
Primary Seal	Polyisobutylene (PIB)
Secondary Seal	Polysulfide / Silicone
U-Value (Thermal)	As low as 1.1 W/m²K
Sound Reduction	Up to 35 dB
UV Blockage	Up to 99%
Custom Sizes	Available on request

Why Choose Duratuf Glass for DGU Glass?

Experience You Can Trust

Duratuf Glass Industries Pvt. Ltd. was established in 1992 at Bahadurgarh, Haryana. The company began its journey in 1986 and has grown into one of India’s leading flat and curved glass producers. We manufacture Automotive, Architectural, Toughened, Laminated, DGU, Aluminum Windows for buses, and Bullet Resistant glass.

Manufacturing Excellence

We operate four manufacturing units — one in Haryana, two in Delhi, and one in Bangalore. This network allows us to serve clients across India with quick turnaround times and consistent quality, ensuring reliable supply, efficient production, timely deliveries, superior customer support, and seamless project execution nationwide.

Pan-India Supply

As established Automotive Glass Suppliers in Haryana, we are strategically located to serve North India’s transport and industrial sectors. We supply glass and glazing products to the automotive, security, and architectural sectors both in India and abroad under the brand names DURATUF and DURASAFE.

Custom Manufacturing

Every vehicle has different requirements. We offer custom sizes, glass types, and finishes to match your exact specifications. Whether you need DGU Glass for a new bus design or replacement glass for existing vehicles, we can deliver with precision, quality, and dependable performance.

Quality Assurance

Our manufacturing facilities use state-of-the-art technology to produce custom-built windows that comply with production specifications. Each DGU unit undergoes rigorous quality checks before leaving our facility.

Diverse Clientele

Our client base includes the Automobile sector (Bus, Car), Railways, offload vehicles, white goods, cookware, paramilitary high security vehicles, and architectural Industries.

Serving Clients Across India

City / Region	What We Supply
Haryana	DGU Glass, automotive glass, industrial vehicle glass
Delhi	Custom DGU Glass for buses, coaches, and heavy vehicles
Bangalore	Industrial vehicle glass solutions, railway coach glass
Indore	Commercial automotive glass, custom DGU units
Pan-India	Complete glass solutions for transport and industry

Frequently Asked Questions

What is DGU Glass?Anil Kumar2026-06-30T11:59:35+00:00

What is DGU Glass?

DGU Glass, or Double Glazed Unit Glass, is an insulating glass product made by combining two or more glass panes with a sealed air or gas-filled gap between them. This construction reduces heat transfer, blocks noise, and prevents condensation.

How does DGU Glass improve energy efficiency in vehicles?Anil Kumar2026-06-30T11:59:59+00:00

How does DGU Glass improve energy efficiency in vehicles?

The air or gas gap between the glass panes acts as an insulator. In summer, it keeps heat out, and in winter, it traps warmth inside. This reduces the load on the vehicle’s air-conditioning or heating system, saving fuel and lowering operating costs.

Can DGU Glass reduce noise inside a vehicle?Anil Kumar2026-06-30T12:00:33+00:00

Can DGU Glass reduce noise inside a vehicle?

Yes. The double layer of glass and the insulating gap block outside noise effectively. DGU Glass can reduce noise by 25 to 35 decibels, especially low-frequency noise from traffic and engines.

What types of glass can be used in DGU units?Anil Kumar2026-06-30T12:00:56+00:00

What types of glass can be used in DGU units?

We manufacture DGU Glass using clear, tinted, laminated, or tempered glass. The choice depends on the specific requirements of the vehicle and the level of protection or insulation needed.

Is DGU Glass suitable for railway coaches?Anil Kumar2026-06-30T12:01:15+00:00

Is DGU Glass suitable for railway coaches?

Absolutely. DGU Glass is widely used in AC railway coaches, including LHB coaches and modern trains like Vande Bharat. It helps maintain interior temperature, reduces noise, and prevents condensation.

How long does DGU Glass last?Anil Kumar2026-06-30T12:01:36+00:00

How long does DGU Glass last?

With proper manufacturing and installation, DGU Glass can last for many years. The seals are designed to keep the cavity dry and the gas fill intact. Duratuf uses high-quality materials and rigorous quality control to ensure long service life.

Can Duratuf supply custom-sized DGU Glass?Anil Kumar2026-06-30T12:01:51+00:00

Can Duratuf supply custom-sized DGU Glass?

Yes. Custom sizing is one of Duratuf Glass’s core strengths. Share the exact dimensions, glass type, and required specifications, and we will fabricate panels that fit perfectly.

What gases are used in DGU Glass?Anil Kumar2026-06-30T12:02:09+00:00

What gases are used in DGU Glass?

We use Argon, Krypton, or dry air to fill the cavity between the glass panes. Argon and Krypton provide better insulation than air and are commonly used in high-performance DGU units.

Where is Duratuf Glass located?Anil Kumar2026-06-30T12:02:24+00:00

Where is Duratuf Glass located?

Duratuf Glass Industries Pvt. Ltd. is headquartered in Bahadurgarh, Haryana, with additional manufacturing units in Delhi and Bangalore. We are well-established as Automotive Glass Suppliers in Haryana and serve clients across India.

How do I place an order for DGU Glass?Anil Kumar2026-06-30T12:02:44+00:00

How do I place an order for DGU Glass?

To place an order, share your requirements — including dimensions, glass type, gas fill, and quantity. Our team will provide a detailed quotation with product specifications and delivery timeline. Visit duratufglass.com or contact our sales team to get started.

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