luglugalugaaen |

seabsea

sea nav gua

Language: en spa ru fra it
sea

form

GET YOUR FREE QUOTE

We will contact you within 24 hours.

Choosing The Right Butterfly Valve

Time: 23-June 2025 | Source: I-FLOW| Share

What Is a Butterfly Valve, and Why Use It
A butterfly valve is a type of quarter-turn valve that uses a rotating disc to regulate flow. Unlike gate or globe valves, it takes up very little space and opens/closes quickly. It’s ideal for large-diameter systems, tight spaces, or where cost and efficiency matter.
You’ll find butterfly valves in everything from HVAC systems and chemical lines to marine and wastewater pipelines.
What Are the Main Types of Butterfly Valves
Concentric (Rubber-Lined): Best for general-purpose use like water, air, or HVAC systems.
Double Offset (High-Performance): Great for moderate pressure/temperature systems such as chemical or food processing.
Triple Offset: Built for high-pressure, high-temperature environments—used in oil, gas, or steam pipelines.
Still not sure? Think about pressure, temperature, and media. These three will help narrow your choices quickly.
Wafer VS Lug: Which Body Style Is Better?
Wafer Butterfly Valve: Slim, economical, and ideal if you're installing between two flanges. Good for systems where you don’t need to isolate one side.
Lug Butterfly Valve: Has threaded bolt holes for bolting directly to flanges—perfect for dead-end service or systems that need one-side disconnection.
If cost is a concern and you don’t need isolation, go wafer. If you're after versatility and better pipeline access, go lug.

What Material Should I Choose
Media TypeSuggested Material
Clean waterCast iron + EPDM seat
Corrosive fluidsStainless steel + PTFE
SeawaterBronze or Duplex Stainless
Steam or OilMetal-seated triple offset
The disc, body, and seat material should all match your working fluid.
Manual or Automated
Use a manual lever or gear operator for simple or small-size installations.
Choose electric or pneumatic actuators for automation, remote control, or integration into process control systems.
Actuated valves are more expensive, but they bring efficiency and safety to large systems or hazardous media.
Any Tips for Sizing the Valve
Consider the flow rate and pressure drop across the valve.
If the valve is for throttling (partially open), look into double offset or triple offset designs for better performance and reduced wear.
Oversized valves can lead to poor control. Undersized valves can restrict flow. Always ask your valve supplier to help with CV calculation if needed.

When Should I Use a Butterfly Valve
①You need a compact, lightweight valve.
②You want quick shut-off and low torque operation.
③You’re handling large volumes at moderate pressure.
④You’re working within a budget and need a cost-effective solution.
They’re not ideal for very high-pressure or tight throttling at low openings. In those cases, a globe valve or triple offset butterfly may serve you better.
Back To The List btn

Related News

What Can Go Wrong When Check Valve Fails
25-July 2025

What Can Go Wrong When Check Valve Fails

Most of us don’t think twice about check valves—until something goes wrong. These small devices quietly keep your system flowing in the right direction. But when a check valve fails, the effects can ripple through your entire setup.So, what actually happens?

View Details
How To Choosing The Right Valve
24-July 2025

How To Choosing The Right Valve

In the world of industrial flow control, not all valves are created equal—and choosing the wrong one can lead to system inefficiencies, breakdowns, or worse. Whether you’re an engineer, contractor, or purchasing manager, knowing what to prioritize when selecting a valve can save you headaches down the road.

View Details
How To Replace Shut Off Valve
22-July 2025

How To Replace Shut Off Valve

It always happens at the worst time. A leaky toilet tank, a dripping faucet, or worse—an unexpected flood. You reach for the shut-off valve under the sink... and it doesn’t budge. Or worse, it breaks off in your hand.That’s when you realize: a small valve has big responsibilities. Replacing a shut-off valve may sound like a plumber’s job, but with a little preparation and a few tools, it’s a DIY-friendly task that can give you long-term peace of mind.

View Details
How To Choose Right Gate Valve
16-July 2025

How To Choose Right Gate Valve

Choosing a gate valve sounds simple—until you realize there are dozens of materials, designs, sizes, and standards out there. Don’t worry. Whether you’re a contractor, engineer, or project manager, this guide will walk you through what matters (and what doesn’t) when picking the perfect gate valve.

View Details
Where Should You Put Check Valve
15-July 2025

Where Should You Put Check Valve

If your pump shuts off and water suddenly rushes back, or your air compressor struggles to hold pressure, you’re likely missing one small—but mighty—device: a check valve.This simple valve only allows fluid to flow one way and automatically stops it from reversing. But it works best when it’s installed in the right place.

View Details
How Does Pneumatic Butterfly Valve Actually Work
14-July 2025

How Does Pneumatic Butterfly Valve Actually Work

Imagine you're managing a large water treatment plant. You can’t afford to run around opening and closing valves by hand. You need speed, reliability, and automation. That’s where pneumatic butterfly valves come in—a smart, air-powered solution for managing fluid flow.But how do they work behind the scenes?

View Details