Check Valve Types You Need to Know (Swing, Lift, NRV & More) with Pricing Guide


 

Check valves are automatic safety valves that allow one-way flow and prevent backflow in pipelines. This guide will explain the main types—swing, lift, ball, and NRV—along with their pricing and usage in different industrial systems.

What is a Check Valve?

A check valve (non-return valve or NRV) is a mechanical valve that allows fluid (liquid or gas) to flow in only one direction. It operates automatically and closes when reverse flow is detected.

🔍 Key Features:

  • Prevents reverse flow

  • Protects pumps and piping

  • No manual operation needed

Types of Check Valves (With Applications)

1. Swing Check Valve

  • Hinge-based disc swings open with forward flow

  • Closes by gravity when flow reverses

  • Ideal for horizontal pipelines

✅ Used In: Water supply, sewage, chemical systems

 2. Lift Check Valve

  • Disc lifts vertically under pressure

  • Works only in vertical or horizontal flow (with upward pressure)

  • Excellent for high-pressure clean fluids

✅ Used In: Steam lines, boilers, water systems

 3. Ball Check Valve

  • Spring-loaded ball mechanism

  • Opens with pressure and seals tightly during reverse flow

  • Minimal maintenance, compact design

✅ Used In: Slurries, chemical dosing, wastewater treatment

4. Dual Plate (Wafer) Check Valve

  • Two half-disc plates with springs

  • Lightweight and compact between flanges

  • Quick shut-off for reverse flow

✅ Used In: HVAC, petroleum, marine systems

 5. Air Check Valve

  • Controls direction of airflow

  • Prevents back-pressure in pneumatic systems

  • Ensures system stability

✅ Used In: Compressors, air dryers, pneumatic tools

 6. Hydraulic Check Valve

  • Designed for oil flow in hydraulic systems

  • Maintains line pressure

  • Allows controlled flow return

✅ Used In: Press machines, loaders, industrial lifts

7. Non-Return Valve (NRV)

  • Indian industry name for check valve

  • Available in all types: swing, lift, ball, etc.

  • Widely used in plumbing & water systems

Comparison Table of Check Valve Types

Valve TypeFlow DirectionInstallationIdeal UseMaintenance
Swing ValveHorizontalEasyWater, sewageLow
Lift ValveVerticalModerateSteam, high-pressure linesMedium
Ball ValveAnyEasyWastewater, chemicalsLow
Wafer ValveAnyCompact FitHVAC, oil & gasLow
Air ValveOne-Way AirSimplePneumaticsLow
Hydraulic ValveOne-Way OilRobustHeavy machineryMedium

 Check Valve Pricing Guide (2025 India)

TypeSize (Inch)MaterialPrice Range (INR)
Swing1" – 4"CI, MS₹250 – ₹1,500
Lift1" – 6"SS, CI₹400 – ₹3,000
Ball½" – 3"PP, HDPE₹100 – ₹1,200
Dual Plate (Wafer)2" – 8"SS304/316₹800 – ₹5,500
Air Valve¼" – 2"Brass, SS₹150 – ₹1,800
Hydraulic Valve¼" – 2"Steel₹350 – ₹2,800

💡 Prices depend on brand, pressure class, and application type.

Where Are Check Valves Used?

🔧 Industrial Applications:

  • Water pumps (borewell, domestic, irrigation)

  • Compressed air systems

  • Hydraulic machinery

  • RO plants and sewage lines

  • Chemical & pharma pipelines

 1-Inch Check Valve – Popular Size

The 1-inch check valve is one of the most commonly used sizes across sectors.

✅ Best For:

  • Domestic water systems

  • Submersible pump lines

  • Irrigation pipes

Advantages of Using the Right Check Valve

  • Reduces risk of back flow

  • Increases pump life

  • Prevents water hammer

  • Improves system safety

FAQs – Check Valve Types & Pricing

Q1.What is the best type of check valve?

Swing and lift check valves are most widely used due to reliability, while ball valves are best for slurry or chemical use.

Q2. What does NRV stand for?

NRV means Non-Return Valve, the Indian term for a check valve that blocks backflow.

Q3. How much does a 1-inch check valve cost?

A 1-inch check valve typically costs ₹250 to ₹500, depending on type and material.

 Q4. Can I use a check valve for air?

Yes, air check valves are made of brass or stainless steel and used in pneumatic systems.

 Q5. What is the function of a ball check valve?

It uses a ball and spring to control flow direction and is suitable for thick or viscous fluids.

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