VOL.4
Control Valve Performance Optimization : Get Better Results from Your Existing Valves
Your Valves Can Perform Much Better
Here's a surprising fact: most control valves in industrial plants don't work as well as they could. But you may not need to buy new valves to solve this problem. Simple improvements can make a big difference.
What We See in Plants
The current situation :
- Some have serious control problems
- A few are badly worn but still working
- No Maintenance (may cause sudden troubles)
What This Costs You
Even small problems add up across your plant :
| Problem Area | What Happens | Impact on Your Plant |
|---|---|---|
| Energy Waste | Poor control uses more electricity, steam, and fuel | Higher utility bills every month |
| Quality Problems | Temperature and flow changes affect your product | More waste and customer complaints |
| Lower Production | Your plant can't make as much as it should | Lost revenue and missed targets |
| More Breakdowns | Problems in valves stress other equipment | Unexpected downtime and repairs |
| Higher Costs | Bad valves need more repairs and parts | Bigger maintenance budget needed |
Easy fixes that cost very little:
- Overhaul control valves
- Perform positioner maintenance
- Improve quality of air supply
Better fixes with moderate cost:
- Add smart positioners
- Change the valve trim
- Replace the actuator
- Install monitoring systems to check valve condition
Step 1 : Check How Your Valves Are Working
You need to measure performance before you can improve it.
Simple Checks You Can Do
| Check Type | What to Look For | Why It Matters |
|---|---|---|
| Visual Inspection | Leaks, rust, damage on valve body | Shows obvious problems needing quick fix |
| Actuator Check | Air leaks, damage, loose parts | Actuator problems prevent valve from working |
| Positioner Condition | Protection from weather, physical damage | Bad positioner means poor control |
| Piping Setup | Correct installation, no stress on valve | Wrong installation causes valve problems |
| Valve Travel | Check the difference between actual valve travel and control output | Show valve and positioner problem (stuck, damage and wiring etc.) |
| Process Response | How temperature/pressure responds | Shows if valve is working properly |
Focus on Important Valves First
- Work on valves that matter most:
Fix these valves first:
- Valves that affect product quality
- Valves important for safety
- Valves that use lots of energy
Better Control Means Better Quality
When valves work better, your product quality improves and you have fewer problems.
Common Problems and Simple Solutions
| Problem | Why It Happens | How to Fix It | What You Get |
|---|---|---|---|
| Valve moves back and forth constantly | Valve too big, Actuator too small, settings wrong, or sticky | Change trim/actuator, adjust settings, or change packing | Stable control and consistent quality |
| Valve responds too slowly | Actuator too small, friction, or slow positioner | Upgrade actuator or service the valve or adjust PID parameter of positioner or add volume booster | Quick response to changes |
| Temperature/pressure varies too much | Several things affecting valve and control | Systematic improvements to fix root causes | Tighter control and less waste |
Quality Benefits
When you reduce temperature variation:
- Product is more consistent
- You make more good product
- Less waste and rework
- Can run at better conditions
Solve Sizing Problems Without Buying New Valves
Many valve problems come from wrong sizing. You can often fix this without replacing the whole valve.
How to Spot Sizing Problems
Is Your Valve the Wrong Size?
| Valve Too Big | Valve Too Small |
|---|---|
| Uses only small part of its range | Uses most or all of its range |
| Small moves cause big flow changes | Can't get enough flow when fully open |
| Control keeps hunting around setpoint | Limits how much you can produce |
Trim Changes: A Cheaper Solution
Compare Your Options:
| Solution | For Oversized Valves | For Undersized Valves |
|---|---|---|
| What to Install | Smaller capacity trim | High-capacity trim |
| What It Does | Reduces flow capacity | Increases flow capacity |
| What You Keep | Same valve body and connections | Same valve body and connections |
| Cost | Much less than new valve | Much less than new valve |
| Performance Result | Much better control | Gets enough flow |
| Energy Benefit | Saves energy from better control | Saves energy from better control |
How to Decide
Should You Optimize or Replace?
| Consider | Choose Trim Change/Optimization | Buy Complete New Valve |
|---|---|---|
| Sizing Problem | Moderate sizing error | Severe sizing error |
| Valve Condition | Body still in good shape | Body worn out or damaged |
| Technology | Modern enough to upgrade | Very old technology |
| Budget | Limited budget available | Full budget available |
| Shutdown Time | Short maintenance windows | Longer shutdown possible |
| Future Plans | No major changes planned | Major process changes coming |
Calculate savings:
- How much energy you'll save
- Better quality and yield
- Less maintenance needed
- Compare to what it costs
Most improvements pay for themselves quickly.
Add Smart Technology
Modern digital positioners can make old valves work like new ones.
Smart Positioner Benefits
What Smart Positioners Give You:
| Benefit Area | What You Get | Why It Matters |
|---|---|---|
| Better Control | Very accurate positioning | Temperature and pressure stay stable |
| Fast and stable response | Quick reaction to process changes | |
| Can change how valve behaves | Solve control problems without replacing valve and positioner | |
| Automatically tunes itself | No need for manual tuning | |
| Problem Detection | Watches valve all the time | Catch problems before they cause downtime |
| Finds problems early | Fix during planned maintenance | |
| Tracks performance over time | See trends and plan ahead | |
| Helps plan maintenance | Know when service is really needed | |
| Communication | Digital communication (HART, Fieldbus) | Diagnose valve condition from the data |
| Change settings remotely | No need to visit valve every time | |
| Get data without visiting valve | Save time and improve safety |
Make Old Valves Last Longer
Smart positioners can extend valve life significantly:
- Modern control features
- Monitor condition
- Work around wear problems
- Delay expensive replacements
Real Results from Azbil
Azbil Thailand has helped many plants improve their valves with proven methods.
We Check Your Valves Completely
What we look at:
- Physical condition and installation
- How well control is working
- If valve size is right
- How to improve maintenance
What you get:
- Detailed reports with recommendations
- Comparison to best practices
- Cost and benefit for each improvement
- Plan for making improvements
We Help You Make Improvements
We provide:
- Exact specifications for improvements
- Help buying parts
- Watch installation and startup
- Train your team
- Verify improvements work
- Document all results
Keep Getting Good Results
Improvements give quick benefits, but you need ongoing work to maintain them
Keep Watching Performance
Track key numbers:
- Important measurements for your valves
- Regular checks and trending
- Reviews and adjustments
Use technology:
- Smart positioner data
- Control system tracking
- Automatic alerts for problems
Work with Maintenance
Fix based on condition:
- Maintain when needed, not on schedule
- Stop problems before they happen
- Use resources better
- Make parts last longer
Learn and improve:
- Train your people
- Use lessons for new valves
- Build improvement culture
Start Today
Valve optimization gives real results with good financial returns. Most plants can find big opportunities through simple assessment.
Work with Azbil Thailand
Our Complete Service Package:
| Service | What We Do | What You Get |
|---|---|---|
| Performance Audit | Check all your valves thoroughly | Detailed report with priorities |
| Implementation | Help with installation and startup | Expert guidance through the work |
| Training | Teach your team | Your people can maintain improvements |
| Ongoing Support | Monitor and optimize continuously | Sustained results over time |
Why Choose Azbil Thailand:
- Deep knowledge of valve technology since 1995
- Experience in many industries across Thailand and Asia
- Local support team with global company resources
- Focus on real, measurable results you can verify
- Proven track record with many successful projects
Take the First Step
Don't waste money on poor valve performance. Contact Azbil Thailand today for a complete valve check.
What happens next:
- Check Your Valves - We look at all your valves
- Get Improvement Plan - We tell you what to fix and how much you'll save
- Make Improvements - We help you do the work
- See Results - We measure and document improvements
Ready to make your valves work better?
Our specialists are ready to help you get real improvements.
Contact us today to learn how valve optimization
can save you money and improve your plant performance.