Concentric Disc Wafer Type Rubber Lined Butterfly Valve Lug Type

Description

Concentric Disc Wafer Type Rubber Lined Butterfly Valve Lug Type

Introduction

In modern industrial piping systems, precise flow control, long service life, and low maintenance are critical requirements. One of the most widely used valves that fulfills all these expectations is the Concentric Disc Wafer Type Rubber Lined Butterfly Valve Lug Type. This valve design combines compact construction, reliable sealing, and cost efficiency, making it a preferred choice across multiple industries in India. Krishna Industries, based in Ahmedabad, Gujarat, India, supplies high-quality concentric disc rubber lined butterfly valves to meet the diverse requirements of Indian buyers, including contractors, EPC companies, factories, water treatment plants, and infrastructure projects.

A concentric disc butterfly valve, also known as a resilient seated butterfly valve, is designed where the disc shaft is centrally aligned with the bore of the valve body, and the disc is concentric to the seat. The rubber lining acts as the primary sealing element, ensuring tight shut-off and smooth operation even at low operating torque. When combined with lug type construction, this valve offers additional installation flexibility, allowing it to be mounted between flanges with bolts threaded into the valve body. This design supports dead-end service and simplifies maintenance without disturbing the entire pipeline.

Krishna Industries positions itself as a reliable supplier of concentric disc wafer type rubber lined butterfly valves in lug type configuration for Indian buyers looking for durability, consistent quality, and competitive pricing. These valves are commonly used alongside industrial butterfly valves, wafer type butterfly valves, lug type butterfly valves, rubber lined valves, concentric butterfly valves, and resilient seated butterfly valves in fluid handling systems across India.

Product Overview

The Concentric Disc Wafer Type Rubber Lined Butterfly Valve Lug Type is engineered for effective isolation and throttling applications. The valve operates using a quarter-turn mechanism where the disc rotates 90 degrees from fully open to fully closed. The rubber lining provides excellent sealing performance, reduces wear on the disc, and protects the valve body from corrosion caused by aggressive media.

The lug type body design includes threaded lugs around the valve body perimeter, enabling secure bolting to flanges. This design allows the valve to function as an end-of-line valve, which is particularly useful in maintenance scenarios where one side of the pipeline needs to be disconnected. Compared to standard wafer type butterfly valves, lug type valves offer better stability and load-bearing capability.

At Krishna Industries, each concentric disc rubber lined butterfly valve is sourced or manufactured following stringent quality standards suitable for Indian operating conditions, including high temperatures, fluctuating pressures, and varied media such as water, air, oils, mild chemicals, and slurries.

Design and Construction Details

The body of the concentric disc wafer type rubber lined butterfly valve lug type is typically manufactured from cast iron, ductile iron, carbon steel, or stainless steel, depending on application requirements. For most Indian water supply, irrigation, HVAC, and industrial utility applications, ductile iron body valves are widely preferred due to their strength, toughness, and cost effectiveness.

The internal rubber lining, also referred to as the seat, is made from high-quality elastomers such as EPDM, NBR, or natural rubber. EPDM rubber lining is especially popular in India for water treatment plants, cooling systems, and general service due to its excellent resistance to water, steam, and mild chemicals. NBR rubber lining is selected for oil and hydrocarbon applications where oil resistance is required.

The disc is concentrically mounted and may be manufactured from ductile iron with nylon coating, stainless steel, or other corrosion-resistant materials. The disc design ensures smooth flow characteristics, minimal pressure drop, and reduced turbulence compared to other valve types. The shaft is precision-machined from stainless steel to ensure strength, corrosion resistance, and long service life.

The lug type construction allows bolts to pass through the pipeline flanges and screw directly into the valve body lugs. This not only ensures proper alignment but also allows the valve to be installed as a termination valve in piping systems. Krishna Industries supplies lug type butterfly valves suitable for both manual and automated operation.

Working Principle

The working principle of a concentric disc rubber lined butterfly valve lug type is simple and efficient. When the actuator or handle is rotated, the shaft turns the disc. In the open position, the disc is parallel to the flow direction, allowing fluid to pass with minimal resistance. In the closed position, the disc rotates perpendicular to the flow and presses against the rubber lining, creating a tight seal.

The concentric design ensures that the disc maintains uniform contact with the rubber seat during closure. This reduces uneven wear and extends the service life of both the disc and the rubber lining. Because of the elastomeric seat, the valve can achieve bubble-tight shut-off in low to medium pressure applications commonly found in Indian industries.

The lug type configuration ensures that even when one side of the pipeline is removed, the valve can hold pressure from the other side, provided it is rated for dead-end service. This feature is highly valued in Indian process plants and utility systems where maintenance downtime needs to be minimized.

Applications in Indian Industries

The Concentric Disc Wafer Type Rubber Lined Butterfly Valve Lug Type is widely used across various sectors in India due to its versatility and economical design. In water supply and distribution systems, these valves are used for isolation and flow control in municipal pipelines, overhead tanks, pumping stations, and treatment plants.

In wastewater treatment plants, rubber lined butterfly valves are ideal due to their resistance to corrosion and ability to handle fluids with suspended solids. EPDM-lined valves are commonly used in aeration systems, sludge handling, and effluent discharge lines.

In HVAC systems, lug type butterfly valves are used for balancing and isolating chilled water and hot water circuits. Their compact design and low operating torque make them suitable for large building services projects across Indian cities.

In chemical processing and pharmaceutical plants, concentric disc butterfly valves with appropriate rubber lining are used for handling mild chemicals and process fluids. Selection of rubber material is done carefully to ensure compatibility with the media.

In power plants, sugar industries, paper mills, cement plants, and steel plants, these valves are used for utility services such as cooling water, compressed air, and low-pressure steam. Krishna Industries supplies valves suitable for these demanding Indian industrial environments.

Advantages of Concentric Disc Rubber Lined Butterfly Valve Lug Type

One of the primary advantages of this valve type is its compact and lightweight design. Compared to gate valves and globe valves of the same size, butterfly valves occupy less space and are easier to install, which is especially beneficial in confined piping layouts.

The rubber lining provides excellent sealing performance and reduces leakage, making it suitable for applications requiring tight shut-off. The concentric disc design ensures even wear, resulting in longer service life and reduced maintenance costs.

The lug type body allows flexible installation and easy removal of downstream piping without affecting the upstream side. This feature significantly reduces maintenance time and labor costs in Indian industrial plants.

These valves offer cost efficiency, making them an economical choice for large-scale projects where multiple valves are required. Krishna Industries focuses on supplying competitively priced valves without compromising on quality, making them accessible to Indian buyers with budget constraints.

Ease of automation is another key advantage. Lug type butterfly valves can be easily fitted with pneumatic actuators, electric actuators, or gear operators, making them suitable for automated systems used in modern Indian process industries.

Sizes and Pressure Ratings

Concentric disc wafer type rubber lined butterfly valves lug type are available in a wide range of sizes to suit different piping requirements. Commonly supplied sizes in India range from 40 mm to 600 mm, with larger sizes available on request.

Pressure ratings typically include PN10 and PN16, which are widely used in Indian water, HVAC, and industrial utility applications. Krishna Industries ensures that supplied valves meet the required pressure ratings and are tested accordingly before dispatch.

Temperature limits depend on the rubber lining material. EPDM-lined valves are generally suitable for temperatures up to around 120 degrees Celsius, while NBR-lined valves are suitable for lower temperature oil applications. Proper selection based on operating conditions is essential for long-term performance.

Quality Standards and Testing

At Krishna Industries, quality is a core focus. Each concentric disc rubber lined butterfly valve lug type supplied is sourced from reliable manufacturers or produced under strict quality control processes. Valves are inspected for dimensional accuracy, material integrity, and surface finish.

Pressure testing is carried out to ensure shell integrity and seat leakage performance. Rubber lining adhesion and disc alignment are also checked to ensure smooth operation and effective sealing.

Compliance with Indian standards and commonly accepted international standards ensures that the valves are suitable for use in Indian infrastructure and industrial projects. Krishna Industries supports buyers with technical guidance and documentation when required.

Why Choose Krishna Industries

Krishna Industries is a trusted supplier of industrial valves based in Ahmedabad, Gujarat, India. With a strong understanding of Indian market requirements, the company focuses on supplying reliable, cost-effective, and application-specific valve solutions.

By sourcing quality products and maintaining transparent business practices, Krishna Industries has built long-term relationships with traders, contractors, and end users across India. The company understands the importance of timely delivery, consistent quality, and after-sales support for Indian buyers.

Krishna Industries positions itself not just as a seller, but as a solution provider, helping customers select the right concentric disc wafer type rubber lined butterfly valve lug type based on pressure, temperature, media, and installation requirements.

Minimum Order Quantity and Indian Buyer Focus

The minimum order quantity for this product is 10 units, making it suitable for bulk buyers, project requirements, and resellers within India. This product page and offering are strictly focused on Indian buyers, considering Indian operating conditions, standards, and commercial practices.

Krishna Industries caters to buyers from Ahmedabad, Gujarat, and all major industrial regions across India, including Maharashtra, Rajasthan, Madhya Pradesh, Delhi NCR, Tamil Nadu, Karnataka, and West Bengal.

Frequently Asked Questions

What is a concentric disc butterfly valve
A concentric disc butterfly valve is a valve where the disc and shaft are centrally aligned with the valve bore, and sealing is achieved using a resilient rubber lining.

What is the advantage of lug type butterfly valve over wafer type
Lug type butterfly valves allow end-of-line service and provide better stability, making maintenance easier without dismantling the entire pipeline.

Which rubber lining is best for water applications
EPDM rubber lining is commonly used for water applications in India due to its excellent resistance to water, steam, and mild chemicals.

Can this valve be used for throttling
Yes, concentric disc rubber lined butterfly valves can be used for throttling, although they are primarily designed for isolation.

What body materials are available
Common body materials include cast iron and ductile iron, with other materials available based on requirement.

Is this valve suitable for automation
Yes, lug type butterfly valves can be easily automated using pneumatic or electric actuators.

What pressure ratings are commonly available
PN10 and PN16 pressure ratings are commonly supplied for Indian applications.

What sizes are typically used in India
Sizes from 40 mm to 600 mm are commonly used, depending on the application.

What industries commonly use this valve
Water treatment, HVAC, chemical processing, power plants, and general industrial utilities commonly use this valve.

Who supplies this valve in India
Krishna Industries, Ahmedabad, Gujarat, India, supplies concentric disc wafer type rubber lined butterfly valves lug type to Indian buyers.

Conclusion

The Concentric Disc Wafer Type Rubber Lined Butterfly Valve Lug Type is a versatile, reliable, and cost-effective solution for flow control and isolation in Indian industrial and infrastructure applications. With its compact design, excellent sealing, and installation flexibility, it continues to be a preferred choice across multiple sectors.

Krishna Industries, based in Ahmedabad, Gujarat, India, offers these valves with a focus on quality, consistency, and Indian buyer requirements. With a minimum order quantity of 10 units and a strong commitment to customer satisfaction, Krishna Industries stands as a dependable supplier for concentric disc rubber lined butterfly valves across India.