How to Choose the Right NRV | Concorde Valves Guide

 

Choosing the Right Non Return Valve: A Buyer’s Guide

Selecting the correct Non Return Valve (NRV) isn’t just about ticking off a box—it’s about protecting your system, maintaining flow integrity, and reducing the risk of costly failures. The right NRV can make or break your operational efficiency, especially in high-demand industrial environments.

At Concorde Valves & Automation, we understand the pressure industries face when it comes to flow control. That’s why we offer a trusted range of options, including the Ball Type Non-Return Valve Flanged End and Ball Type Non-Return Valve Screwed End. Each type serves a specific purpose, and choosing the right one requires some clear thinking.

Let’s break down the major considerations to help you make the right choice.

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Understand Your System’s Flow Requirements

First and foremost, assess the direction, pressure, and type of flow in your pipeline. NRVs are designed to allow flow in only one direction and automatically close when the flow tries to reverse.

• Is the system under constant flow, or is it intermittent?

• Will it handle liquids, gases, or slurries?

• Are there sudden surges or pulsating flows?

These factors will determine what kind of sealing mechanism and material you need. For example, ball-type NRVs are better at handling dirty fluids or systems with sediment because they don’t clog easily.

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Choosing Between Flanged End and Screwed End NRVs

Both types of NRVs serve the same core purpose but differ in construction, installation, and ideal applications.

1. Ball Type Non-Return Valve Flanged End

This type is best suited for heavy-duty industrial applications where high pressure and large pipe diameters are involved. It features flanged ends that bolt directly to matching pipeline flanges, offering a secure and leak-resistant connection.

Ideal for:

• Large-scale pumping stations

• Water treatment plants

• Chemical and oil pipelines

• Systems requiring robust support and minimal vibration

The Ball Type Non-Return Valve Flanged End from Concorde Valves & Automation is engineered for durability. Its rugged design allows it to handle corrosive or abrasive media while ensuring a reliable seal even at high pressure.

If your system demands long-term stability and is subject to high mechanical stress, this is your go-to valve.

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2. Ball Type Non-Return Valve Screwed End

On the other hand, the Ball Type Non-Return Valve Screwed End is more compact and easier to install. With threaded connections, it's perfect for low- to medium-pressure applications where speed, flexibility, and space are factors.

Ideal for:

• Modular systems or pilot plants

• HVAC systems

• Small-scale chemical or pharmaceutical setups

• Mobile units or temporary installations

This variant from Concorde Valves & Automation is also a favorite in industries where systems are frequently reconfigured. It can be installed or removed with minimal effort and doesn't require heavy tools or downtime.

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Factor in the Media Being Handled

The type of media passing through your system matters more than most people realize. Water, oil, gas, steam, and chemicals all behave differently under pressure. Some are corrosive, others are viscous. Your NRV material and design must align with these properties.

Both the Ball Type Non-Return Valve Flanged End and the Screwed End versions from Concorde are available in a variety of materials, including cast iron, stainless steel, and bronze—each selected for compatibility with specific media types.

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Consider Orientation and Space Constraints

Non Return Valves are installed in either horizontal or vertical pipelines, and not all valves can function equally well in both positions.

Ball-type NRVs are particularly versatile. Thanks to the free-moving ball that seats with gravity or flow pressure, these valves can work in almost any orientation. The Screwed End model is great for cramped spaces or vertical installations, while the Flanged End model works best in larger horizontal runs.

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Maintenance and Inspection Access

Ease of maintenance is often overlooked during initial selection—but it shouldn't be. NRVs with simpler internal mechanisms, like ball-type valves, require less frequent servicing and are easier to inspect.

The Ball Type Non-Return Valve Screwed End excels here. In systems where quick disassembly and inspection are necessary—such as pharmaceutical or food-grade setups—this type reduces downtime and improves operational readiness.

The Flanged End version also offers maintenance-friendly features, especially in large industrial settings where scheduled shutdowns allow for periodic checks.

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Partner with the Right Manufacturer

Not all NRVs are built the same. Material quality, machining precision, and pressure testing all make a difference in real-world performance. That’s why it’s critical to buy from a manufacturer who understands industry demands.

Concorde Valves & Automation is known for consistent quality, technical expertise, and product durability. Whether you're choosing a Ball Type Non-Return Valve Flanged End for a chemical plant or a Screwed End model for a small-scale water system, we ensure every valve meets exacting standards.