🛠️ A Complete Guide to Non Return Valves – By Udhhyog
A non return valve (NRV), also known as a check valve, plays a vital role in preventing backflow in industrial pipelines. At Udhhyog, we understand the importance of robust and reliable valve systems for industries ranging from water supply to chemical plants, oil refineries, and wastewater treatment.
In this article, we explore different types of check valves, including the highly popular check valve type wafer and dual plate non return valve, with a focus on their applications, advantages, and why Udhhyog is the trusted choice across India.
🔍 What is a Non Return Valve?
A non return valve allows fluid to flow in only one direction. Its main purpose is to prevent reverse flow which could damage equipment, contaminate clean water supplies, or disrupt industrial processes. These valves operate automatically and do not require any external control.
At Udhhyog, we offer a complete range of non return valves made from cast iron, stainless steel, and forged carbon steel, customized for your application needs.
🧩 Difference Between Check Valve and Non Return Valve
The terms check valve non return valve are often used interchangeably. Technically, both perform the same function—allowing flow in one direction and blocking reverse flow.
The main distinction lies in design and application context:
Check Valves are often used in high-pressure systems like oil and gas pipelines.
Non Return Valves (NRVs) are more common in water supply, drainage, and low-pressure systems.
Udhhyog supplies both, offering high-quality products manufactured to meet IS, ANSI, and DIN standards.
🧱 Types of Check Valves Supplied by Udhhyog
1. Swing Check Valve (Hinged NRV)
This is the most common a non return valve type. It consists of a disc that swings open with forward flow and closes under reverse pressure.
Applications: Water treatment plants, pump discharge lines.
Advantage: Low-pressure drop, easy maintenance.
2. Lift Check Valve
Lift check valves have a disc that moves up and down inside the body. Suitable for high-pressure vertical systems.
Applications: Boilers, steam lines.
Advantage: Tight sealing and durable construction.
3. Check Valve Type Wafer
A check valve type wafer is compact, lightweight, and easy to install between flanges. It fits in systems where space is limited.
Applications: HVAC systems, chemical plants.
Advantage: Cost-effective and corrosion-resistant.
Udhhyog offers wafer check valves in stainless steel, duplex steel, and PTFE-lined options depending on media compatibility.
4. Dual Plate Non Return Valve
A dual plate non return valve is a wafer-type valve with two spring-loaded plates that open with forward flow and shut instantly when flow reverses.
Applications: Power plants, oil and gas pipelines.
Advantage: Energy-efficient, less water hammer effect.
We offer dual plate NRVs in sizes ranging from 2" to 24", suitable for horizontal and vertical pipelines.
🧪 Why Wafer-Type and Dual Plate NRVs are Preferred in Industry
Compact design: Wafer valves are much slimmer compared to full-body swing valves.
Lightweight: Easier installation and lower freight costs.
Quick shut-off: Dual plates close faster than swing discs, reducing pressure surges.
Energy efficiency: Less flow resistance means lower pump energy consumption.
🏭 Udhhyog – Your Trusted Industrial Valve Supplier
At Udhhyog, we are more than just a valve supplier—we’re a partner in your infrastructure. Whether it's a government water board, an EPC contractor, or a manufacturing unit, we’ve earned the trust of clients across India.
✅ Why Choose Udhhyog?
We are suppliers in Delhi, Punjab, Gujarat, Rajasthan, Jammu & Kashmir, Himachal Pradesh, Uttar Pradesh
Custom Valve Solutions – Tailored to meet media type, temperature, and flow requirements.
Reliable Inventory – From ½” to 24” NRVs in cast iron, WCB, SS316, and more.
Credit Facility Available – Flexible terms for long-term partners.
Fast Delivery – PAN India network with warehouses in Delhi & NCR.
Check out our full range: 👉 https://udhhyog.com/valves
🔄 How to Select the Right Check Valve?
Choosing the right check valve non return valve depends on:
Media Type: Water, gas, steam, chemicals.
Pressure & Temperature: Choose materials accordingly (CI, SS, PTFE).
Installation Orientation: Horizontal or vertical.
Space Constraints: Use wafer or dual plate valves in compact areas.
At Udhhyog, our technical experts help clients choose the best valve type based on data sheets and flow dynamics.
🧰 Installation Tips for Long Valve Life
Always check flow direction arrow before fitting.
Ensure no pipe misalignment that could stress the valve body.
Use PTFE tape or gaskets to prevent leakage.
For wafer and dual plate types, ensure correct centering between flanges.
Regular maintenance and correct installation can increase the life of your non return valve by years.
🌏 Where Are These Valves Commonly Used?
Municipal water supply lines
Oil and gas pipelines
Firefighting systems
Sewage and drainage systems
Chemical plants
Steam & boiler lines
With rising demand for water conservation and backflow prevention, industries are rapidly switching to dual plate NRVs and wafer check valves for long-term cost and performance benefits.
🔗 Related Products from Udhhyog
MS Flanges
Ball Valves
Butterfly Valves
GI Pipes & Fittings
Explore our industrial valve solutions at 👉 https://udhhyog.com
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