Flange Double Plate Check Valve

Description

Flange Double Plate Check Valve – Reliable Non-Return Valve for Indian Industrial Applications

Introduction to Flange Double Plate Check Valve

A Flange Double Plate Check Valve, also widely known in the Indian market as a dual plate check valve, non return valve (NRV), wafer type check valve (flanged version), or backflow prevention valve, is one of the most essential flow control components used across pipelines and process industries. In Indian industrial systems—where pressure fluctuations, space constraints, and cost efficiency are critical—this valve design has become a preferred solution over conventional swing check valves.

Krishna Industries, based in Ahmedabad, Gujarat, India, is a trusted supplier of Flanged Double Plate Check Valves for domestic Indian buyers including industrial contractors, EPC companies, factory maintenance teams, water treatment plants, pump manufacturers, and valve traders across major cities such as Ahmedabad, Mumbai, Pune, Delhi, NCR, Chennai, Hyderabad, Bengaluru, Surat, Vadodara, and Indore.

The primary function of a flange double plate check valve is simple yet critical: to allow fluid flow in one direction and automatically prevent reverse flow. Reverse flow can cause severe damage to pumps, compressors, pipelines, and other costly equipment. In Indian industries where power cuts, sudden pump stoppage, and fluctuating line pressures are common, installing a reliable non-return valve is not optional—it is mandatory.

Unlike bulky swing check valves, the double plate design uses two spring-loaded plates mounted on a central hinge pin. This design ensures fast closing action, reduced water hammer, compact installation, and lower pressure drop. The flanged end connection provides a robust, leak-proof joint suitable for higher pressure ratings and permanent pipeline installations common in Indian industrial plants.

At Krishna Industries, we supply flange double plate check valves that meet Indian site conditions, Indian fluid quality, and Indian operational practices—without overengineering or unnecessary cost escalation.

What is a Flanged Double Plate Check Valve?

A flanged double plate check valve is an automatic valve that operates without external power or manual intervention. It consists of:

• Valve body with flanged ends
• Two semi-circular plates (double disc)
• Central hinge pin
• Spring mechanism for quick closure
• Soft or metal seat depending on application

When fluid flows in the forward direction, the pressure pushes the plates open against the spring force. As soon as the flow reduces or stops, the spring immediately closes the plates, preventing backflow. This rapid response is especially useful in Indian pumping systems where frequent on-off cycles are common.

Why Flange Double Plate Check Valves are Preferred in India

Indian industries demand equipment that is:

• Compact due to space limitations
• Cost-effective without compromising safety
• Easy to install and maintain
• Capable of handling inconsistent operating conditions

Flange double plate check valves meet all these requirements. Compared to swing check valves, they are lighter, shorter in face-to-face dimension, and more stable during operation. This makes them ideal for Indian factories, water supply networks, fire protection systems, and HVAC installations.

Key Features of Flange Double Plate Check Valve Supplied by Krishna Industries

• Compact and lightweight design
• Fast closing action to reduce water hammer
• Lower pressure drop compared to conventional NRVs
• Suitable for horizontal and vertical pipelines
• Flanged ends for strong and leak-proof installation
• Available in multiple materials for Indian fluids
• Designed for long service life in Indian operating conditions

Material Construction Options

To suit diverse Indian industrial applications, Krishna Industries supplies flange double plate check valves in multiple material combinations:

• Body: Cast Iron (CI), Ductile Iron (DI), Carbon Steel (WCB), Stainless Steel (CF8 / CF8M)
• Disc: Stainless Steel, Ductile Iron with coating
• Seat: EPDM, NBR, Viton, Metal-to-Metal
• Spring: Stainless Steel

Material selection depends on fluid type, pressure rating, temperature, and site conditions commonly found in Indian plants.

Pressure Class and Size Range

Krishna Industries supplies flange double plate check valves in the following ranges commonly used in India:

• Sizes: DN50 (2”) to DN600 (24”)
• Pressure Rating: PN10, PN16, PN25
• Standards: IS, ANSI-compatible flanges as required for Indian projects

Custom sizes and pressure requirements can be arranged for bulk Indian orders.

Applications of Flange Double Plate Check Valve in India

These valves are extensively used across Indian industries, including:

• Water supply and distribution systems
• Sewage and effluent treatment plants
• Fire fighting pipeline networks
• HVAC systems in commercial buildings
• Cooling water lines in power plants
• Pump discharge lines
• Compressed air systems
• Process pipelines in chemical and pharmaceutical plants

Their compact design makes them especially useful in retrofit projects and space-restricted Indian installations.

Advantages Over Swing Check Valves

This is why Indian consultants and project engineers increasingly specify double plate check valves for new installations.

Installation Guidelines

• Ensure correct flow direction marking
• Use proper flange gaskets suitable for Indian water quality
• Tighten bolts evenly to avoid body stress
• Install on pump discharge for best protection

No special orientation tools are required, making installation easy even in Indian site conditions.

Quality Assurance by Krishna Industries

Each flange double plate check valve supplied by Krishna Industries undergoes:

• Visual inspection
• Dimensional checks
• Hydrostatic pressure testing
• Seat leakage testing

We focus on supplying valves that work reliably in Indian environments rather than laboratory-only performance.

Why Buy from Krishna Industries, Ahmedabad?

• Supplier based in Ahmedabad, Gujarat – India’s valve manufacturing hub
• Strong understanding of Indian market requirements
• Competitive pricing for traders and bulk buyers
• Consistent quality and supply reliability
• Support for OEMs, contractors, and resellers

Krishna Industries positions itself not just as a seller, but as a dependable Indian valve supply partner.

Frequently Asked Questions (FAQ)

1. What is the main use of a flange double plate check valve?

It is used to prevent reverse flow in pipelines, protecting pumps and equipment commonly used in Indian industrial systems.

2. Can this valve be installed vertically?

Yes, flange double plate check valves can be installed both horizontally and vertically, subject to flow direction.

3. Is this valve suitable for water supply projects in India?

Yes, it is widely used in municipal and industrial water supply systems across India.

4. What is the difference between wafer and flanged double plate check valves?

Flanged versions have integral flanges for stronger connections, preferred in permanent Indian installations.

5. What maintenance is required?

Minimal maintenance is required due to the simple internal mechanism.

6. Can it handle dirty water or effluent?

Yes, with appropriate seat and material selection, it is suitable for Indian effluent and sewage lines.

7. What sizes are commonly used in India?

Sizes from DN80 to DN300 are most commonly used in Indian industries.

8. Does it reduce water hammer?

Yes, the spring-loaded plates close quickly, significantly reducing water hammer.

9. Are spare parts available?

Yes, Krishna Industries supports spare availability for Indian customers.

10. Where is Krishna Industries located?

Krishna Industries is located in Ahmedabad, Gujarat, India, supplying valves across the country.

Conclusion

The Flange Double Plate Check Valve is a smart, efficient, and reliable solution for preventing backflow in Indian industrial pipelines. Its compact design, fast response, and long service life make it ideal for modern Indian infrastructure projects. By sourcing from Krishna Industries, Ahmedabad, Indian buyers get a valve that balances performance, durability, and cost—engineered for Indian conditions and supported by a supplier who understands the domestic market.

For bulk requirements, trader pricing, or project supply, Krishna Industries stands ready to support your valve needs across India.