Flap Type NRV

Flap Type NRV Manufacturer, Supplier, Exporter in Ahmedabad, Gujarat, India

Krishna Industries is a trusted Manufacturer, Supplier, Wholesaler, Exporter, Distributor and Trader of premium quality Flap Type NRV based in Ahmedabad, Gujarat, India. We specialize in providing robust, high-performance non-return valves designed for industrial, commercial, and infrastructure applications across India.

A Flap Type NRV (Non Return Valve) is an automatic valve that allows fluid to flow in only one direction and prevents backflow. It is widely used in pipelines handling water, chemicals, oil, steam, and other process media. Also known as a Non Return Valve, Check Valve, Swing Check Valve, and Industrial NRV Valve, this valve plays a critical role in protecting pumps, compressors, and process equipment.

At Krishna Industries, we design Flap Type NRV valves using superior-grade raw materials such as Cast Iron, Ductile Iron, Cast Steel, Stainless Steel, and special alloys. Our valves are engineered to meet Indian industrial standards and are suitable for municipal water supply, wastewater treatment, chemical processing plants, oil & gas industries, fire protection systems, and HVAC systems.

What is Flap Type NRV?

A Flap Type NRV is a self-operating valve that opens when fluid flows in the forward direction and closes automatically when reverse flow occurs. The closing mechanism is typically a hinged disc (flap) that swings away from the seat when flow pressure is applied and returns to the seat when flow stops.

The simple yet highly effective design ensures:

• Automatic backflow prevention
• Minimal pressure drop
• Low maintenance operation
• Long service life
• Protection of pumps and pipelines

Key Features of Flap Type NRV

• Heavy-duty body construction
• Precision-machined seating surface
• Corrosion-resistant internal components
• Suitable for horizontal and vertical installation
• Leak-proof sealing
• Low cracking pressure
• Long operational life
• Easy maintenance design

Technical Specifications

• Size Range: 50mm to 1000mm
• Pressure Rating: PN10 / PN16 / PN25 / Class 150 / Class 300
• End Connection: Flanged / Threaded / Customized
• Body Material: CI / DI / CS / SS / Alloy Steel
• Disc Material: SS / CI / DI / Bronze
• Seat: Metal-to-Metal / Soft Seated
• Testing: Hydrostatic & Leakage Test as per standards

Applications of Flap Type NRV

Our Flap Type NRV is widely used across multiple industries:

• Water Supply & Distribution Systems
• Sewage & Wastewater Treatment Plants
• Chemical Processing Industries
• Oil & Gas Pipelines
• Fire Fighting Systems
• Power Plants
• HVAC Systems
• Industrial Pumping Stations

Advantages of Choosing Krishna Industries

1. Quality Manufacturing

We follow stringent quality control measures at every stage of production. Each valve undergoes dimensional inspection, pressure testing, and surface finishing verification before dispatch.

2. Competitive Pricing for Indian Buyers

We focus 100% on Indian buyers by offering cost-effective pricing without compromising quality. Our strong supply chain network in Gujarat ensures faster delivery across India.

3. Customization Support

We provide customized sizes, materials, pressure ratings, and coatings as per client requirements.

4. MOQ – 10 Pieces

Minimum Order Quantity (MOQ): 10 Pieces.

Working Principle of Flap Type NRV

The working principle is based on differential pressure. When the upstream pressure exceeds downstream pressure, the flap opens. When reverse flow starts or pressure drops, gravity and reverse pressure force the flap to close, preventing backflow.

This mechanism ensures:

• Protection against pump damage
• Prevention of water hammer (with proper installation)
• Maintaining system pressure

Why Flap Type NRV is Important in Industrial Systems?

Backflow can cause severe damage in industrial systems, leading to contamination, pressure imbalance, and mechanical failures. A high-quality Flap Type NRV ensures uninterrupted operation and system safety.

In water distribution systems, it prevents reverse contamination. In pump discharge lines, it avoids reverse rotation of pumps. In chemical plants, it stops hazardous fluid reversal.

Material Options

Cast Iron Flap Type NRV

Economical solution for water and non-corrosive media.

Ductile Iron Flap Type NRV

High strength and durability for municipal applications.

Stainless Steel Flap Type NRV

Excellent corrosion resistance for chemical industries.

Cast Steel Flap Type NRV

Suitable for high-pressure applications.

Quality Assurance

Krishna Industries ensures:

• Raw material inspection
• Precision machining
• Assembly under supervision
• Hydro pressure testing
• Leakage testing
• Final visual inspection

Packaging & Delivery

We provide safe packaging using wooden boxes or customized packaging as per buyer requirements. Our logistics team ensures safe and timely delivery across India.

Frequently Asked Questions (FAQs)

1. What is a Flap Type NRV?

A Flap Type NRV is a non-return valve that prevents reverse flow in a pipeline.

2. What is the MOQ?

Minimum Order Quantity is 10 pieces.

3. What materials are available?

CI, DI, CS, SS, and alloy materials are available.

4. Can it be used for water applications?

Yes, it is ideal for water and wastewater systems.

5. What pressure ratings are available?

PN10, PN16, PN25, Class 150, Class 300.

6. Do you provide customized sizes?

Yes, customization is available.

7. Is it suitable for vertical installation?

Yes, depending on design specifications.

8. Do you provide testing certificates?

Yes, test certificates can be provided upon request.

9. What industries use this valve?

Water, chemical, oil & gas, fire systems, and power plants.

10. Why choose Krishna Industries?

Because we provide quality products, competitive pricing, fast delivery, and dedicated support for Indian buyers.

Contact Krishna Industries

If you are looking for a reliable Flap Type NRV Manufacturer, Supplier, Wholesaler, Exporter, Distributor and Trader in Ahmedabad, Gujarat, India, contact Krishna Industries today. We ensure quality, durability, and performance in every valve we supply.