Double Eccentric Off Set Disc Wafer Type Butterfly Valve

Description

Double Eccentric Offset Disc Wafer Type Butterfly Valve – Industrial Grade Solution for Indian Buyers

Introduction

In modern Indian industrial infrastructure, flow control equipment plays a decisive role in ensuring safety, efficiency, and long-term operational stability. Among the most widely adopted solutions across water supply, power plants, refineries, process industries, and large-scale pipelines is the Double Eccentric Offset Disc Wafer Type Butterfly Valve. This valve design has become a preferred alternative to traditional concentric butterfly valves and bulky gate or globe valves due to its compact construction, superior sealing performance, reduced torque requirement, and extended service life.

The double eccentric butterfly valve is engineered with an offset shaft and offset disc geometry that significantly minimizes friction between the seat and disc during opening and closing operations. This design advantage makes it ideal for applications where frequent operation, higher pressure ratings, and long-term reliability are required. When supplied in wafer type construction, the valve further offers space-saving installation, cost efficiency, and ease of maintenance, which are highly valued by Indian industries working under practical site constraints.

Krishna Industries, based in Ahmedabad, Gujarat, India, is a trusted supplier of Double Eccentric Offset Disc Wafer Type Butterfly Valves for Indian buyers. With a strong understanding of Indian operating conditions, standards, and buyer expectations, Krishna Industries focuses on delivering valves that combine robust engineering, consistent quality, and competitive pricing. Our valves are widely used by contractors, EPC companies, industrial plants, municipalities, and OEMs across India.

This product page provides a comprehensive overview of the Double Eccentric Offset Disc Wafer Type Butterfly Valve, including its construction, working principle, materials, advantages, applications, and reasons why Krishna Industries is the right supplier for your valve requirements in India.

What is a Double Eccentric Offset Disc Wafer Type Butterfly Valve

A Double Eccentric Offset Disc Wafer Type Butterfly Valve is a quarter-turn flow control valve where the shaft is offset in two directions from the centerline of the disc and seat. The first offset is from the centerline of the valve body, and the second offset is from the centerline of the disc seat. This dual offset design ensures that the disc only contacts the seat at the final moment of closing, thereby reducing wear and tear.

The wafer type body construction allows the valve to be installed between two pipe flanges using stud bolts or through bolts. This design eliminates the need for heavy flanged ends, making the valve lighter, more compact, and easier to handle during installation.

Compared to concentric butterfly valves, double eccentric valves offer better sealing, lower operating torque, and higher pressure-handling capability. Compared to triple eccentric valves, they provide an excellent balance between performance and cost, making them highly suitable for a wide range of Indian industrial applications.

Key Related Product Keywords Integrated in Industry Usage

In Indian industrial procurement and engineering discussions, the Double Eccentric Offset Disc Wafer Type Butterfly Valve is often evaluated alongside other flow control solutions such as resilient seated butterfly valves, metal seated butterfly valves, wafer type butterfly valves, flanged butterfly valves, and eccentric butterfly valves. Buyers frequently compare these valves based on pressure rating, temperature capability, torque requirement, sealing performance, and lifecycle cost. Krishna Industries ensures that its double eccentric wafer type butterfly valves meet these practical evaluation parameters.

Construction and Design Features

The Double Eccentric Offset Disc Wafer Type Butterfly Valve supplied by Krishna Industries is designed with precision engineering and robust materials suitable for Indian industrial environments.

Valve Body
The valve body is manufactured in high-quality cast iron, ductile iron, carbon steel, or stainless steel depending on application requirements. Wafer type construction ensures compactness and uniform clamping between pipe flanges. The body is designed to withstand line pressure and mechanical stresses during operation.

Disc
The offset disc is typically manufactured from ductile iron with epoxy coating, stainless steel, or other alloy steels as required. The disc profile is optimized for smooth flow characteristics, reduced pressure drop, and reliable shut-off.

Shaft
The shaft is made from high-strength stainless steel or carbon steel, precision-machined to ensure proper alignment and smooth rotation. Double offset shaft positioning ensures minimal seat wear and consistent sealing performance.

Seat
The seat material varies based on service conditions and may include EPDM, NBR, PTFE, or metal seats. For most Indian water, HVAC, and utility applications, resilient seats are preferred due to their excellent sealing and cost-effectiveness.

Bearings and Bushings
High-quality bushings are used to support the shaft and reduce friction, ensuring long service life even under frequent operation.

Actuation Options
The valve can be supplied with lever operation, gear operation, or actuator mounting provisions. Electric or pneumatic actuators can be fitted as per project requirements.

Working Principle

The working principle of a Double Eccentric Offset Disc Wafer Type Butterfly Valve is based on quarter-turn rotation. When the valve is in the closed position, the disc rests against the seat with uniform sealing pressure. As the valve begins to open, the double offset geometry causes the disc to move away from the seat immediately, eliminating sliding friction.

This feature significantly reduces torque requirements and minimizes seat wear. During closing, the disc only comes into contact with the seat at the final stage, ensuring tight shut-off without excessive friction. This design is especially beneficial in applications where the valve is operated frequently or remains in service for extended periods.

Advantages of Double Eccentric Offset Disc Wafer Type Butterfly Valve

Reduced Operating Torque
Due to the double offset design, the valve requires lower torque compared to concentric butterfly valves. This allows the use of smaller actuators and manual operators, reducing overall system cost.

Extended Seat Life
Minimal friction between disc and seat during operation leads to reduced wear and longer service life.

Compact and Lightweight
Wafer type construction makes the valve compact and lightweight, ideal for installations with space constraints.

Reliable Sealing
The valve offers consistent and dependable sealing performance across a wide range of pressures and temperatures.

Cost-Effective Solution
Compared to gate valves and globe valves, the double eccentric wafer butterfly valve offers significant cost savings in terms of initial price, installation, and maintenance.

Ease of Installation and Maintenance
Wafer mounting simplifies installation between flanges, and the valve design allows easy maintenance when required.

Applications in Indian Industries

The Double Eccentric Offset Disc Wafer Type Butterfly Valve is widely used across various sectors in India.

Water Supply and Distribution
Municipal water pipelines, water treatment plants, and pumping stations.

HVAC Systems
Chilled water and hot water circulation in commercial and industrial buildings.

Power Plants
Cooling water systems, auxiliary pipelines, and utility services.

Oil and Gas
Low-pressure and non-critical service lines where compact and reliable flow control is required.

Chemical and Process Industries
Process water, utility fluids, and compatible chemicals.

Sugar, Paper, and Textile Industries
Utility services and process flow control.

Indian Standards and Compatibility

Krishna Industries supplies valves that are compatible with commonly used Indian and international standards. The valves are designed to suit flange standards widely used in India, ensuring easy integration into existing pipeline systems. Materials and coatings are selected to withstand Indian environmental conditions, including humidity, temperature variations, and water quality.

Why Indian Buyers Prefer Double Eccentric Wafer Butterfly Valves

Indian buyers prioritize durability, ease of maintenance, availability of spares, and overall value for money. The Double Eccentric Offset Disc Wafer Type Butterfly Valve meets these expectations by offering robust construction, proven performance, and adaptability to various applications. Its balanced performance and pricing make it an ideal choice for contractors and industrial buyers across India.

Krishna Industries as a Trusted Supplier in Ahmedabad, Gujarat

Krishna Industries has established itself as a reliable supplier of industrial valves in Ahmedabad, Gujarat, India. Our strategic location allows us to efficiently serve customers across Gujarat, Maharashtra, Rajasthan, Madhya Pradesh, Delhi NCR, and other major industrial regions of India.

We understand the procurement process followed by Indian industries and ensure timely supply, consistent quality, and technical support. Our focus is on building long-term relationships with buyers by offering dependable products and transparent business practices.

Quality Assurance and Testing

Each Double Eccentric Offset Disc Wafer Type Butterfly Valve supplied by Krishna Industries undergoes quality checks to ensure dimensional accuracy, smooth operation, and reliable sealing. Testing procedures are aligned with industry norms to ensure performance under operating conditions.

Packaging and Supply

Valves are securely packed to prevent damage during transportation. Clear product identification and documentation are provided to ensure smooth handling at project sites.

Minimum Order Quantity

The minimum order quantity for this product is 10 units. This MOQ is designed to support bulk buyers, contractors, and industrial projects while ensuring competitive pricing for Indian customers.

Frequently Asked Questions

1. What is the main benefit of a double eccentric butterfly valve compared to a concentric butterfly valve
The main benefit is reduced friction between the disc and seat, resulting in lower torque, longer seat life, and better sealing performance.

2. Is the wafer type butterfly valve suitable for Indian pipeline systems
Yes, wafer type butterfly valves are widely used in Indian pipeline systems due to their compact design, ease of installation, and compatibility with common flange standards.

3. Can this valve be used for water applications in India
Yes, it is highly suitable for water supply, distribution, and treatment applications across India.

4. What materials are commonly used for this valve
Common materials include cast iron or ductile iron body, stainless steel shaft, and EPDM or PTFE seat, depending on application requirements.

5. Is this valve suitable for frequent operation
Yes, the double eccentric design is ideal for frequent operation due to reduced wear and lower operating torque.

6. Can actuators be fitted on this valve
Yes, the valve can be supplied with actuator mounting provisions for electric or pneumatic actuators.

7. What industries in India commonly use this valve
Water supply, HVAC, power plants, chemical industries, sugar mills, paper mills, and general process industries.

8. How does Krishna Industries ensure quality
Quality checks are carried out on materials, dimensions, and operation to ensure reliable performance before dispatch.

9. Is this valve cost-effective compared to gate valves
Yes, it offers significant savings in terms of purchase cost, installation space, and maintenance.

10. Where is Krishna Industries located
Krishna Industries is located in Ahmedabad, Gujarat, India, and supplies industrial valves to buyers across the country.

Conclusion

The Double Eccentric Offset Disc Wafer Type Butterfly Valve is a practical, efficient, and reliable flow control solution for Indian industries. Its advanced design, compact construction, and cost-effectiveness make it a preferred choice across multiple sectors. By sourcing this valve from Krishna Industries, Indian buyers benefit from local expertise, dependable supply, and products designed to meet real-world operating conditions. Krishna Industries remains committed to supporting India’s industrial growth with quality valve solutions from Ahmedabad, Gujarat.