Notes from the seal shop
Failure analysis, selection and installation, written for the people who keep pumps running.
In the archive
- 252articles on pump mechanical seals
- Mechanical Seals for Submersible Pumps→
- The Difference Between a Gasket and a Mechanical Seal→
- What Is a Sanitary Mechanical Seal→
- Common Causes of Mechanical Seal Overheating→
- What Is a Throttle Bushing in a Mechanical Seal→
- Mechanical Seal Chamber Pressure vs Suction Pressure→
- Common Silicon Carbide Mechanical Seal Problems→
- How to Install Mechanical Seal on a Reactor→
- What Is the Difference Between Dry and Wet Mechanical Seals→
- How to Maintain Mechanical Seals→
- What Is a Cartridge Mechanical Seal→
- Armstrong-Compatible Pump Mechanical Seals→
- FDA Food-Grade Barrier Fluids for Double Mechanical Seals→
- How Pump Cavitation Destroys Mechanical Seals→
- How to Clean a Mechanical Seal→
- What Is the Gap Between the Faces of a Mechanical Seal→
- What Is the Difference Between a Mechanical Seal Pump and a Magnetic Drive Pump→
- How to Prevent Mechanical Seal Corrosion in Chemical Pumps→
- Mechanical Seals for Boiler Feed Pumps→
- How to Select a Mechanical Seal for a Chemical Plant→
- Choosing Mechanical Seals for Mining Slurry Pumps→
- What Is the Difference Between a Gas Barrier Seal and a Water Flushed Mechanical Seal→
- How to Identify Mechanical Seal Face Damage→
- Vaporization at Mechanical Seal Faces: Causes and Prevention→
- Common Mechanical Seal Installation Mistakes→
- How to Choose Seal Face Material for Abrasive Slurry→
- What Is the Difference Between Ceramic and Silicon Carbide Seal Faces→
- Slurry Pump Seal Failure Modes→
- Matching and Reverse Engineering an Obsolete Mechanical Seal→
- What the API 682 4th Edition Changed from the 3rd Edition→
- How to Calculate Seal Pot Pressure for API Plan 53A/53B/53C Dual Seal Systems→
- Mechanical Seal Test Bench Requirements and Specifications→
- John Crane Competitors and Alternatives for Pump Mechanical Seals→
- How Seal Chamber Pressure Affects Seal Leakage→
- ANSI B73.1 Pump Seal Chamber Dimensions, Bore Types, and Fitment Guide→
- Troubleshooting a Leaking Vertical Multistage Pump Seal After Replacement→
- How to Calculate Fugitive Emission Rates for Sealed Equipment→
- Differential Pressure Decay Testing for Mechanical Seals→
- How to Troubleshoot Agitator Mechanical Seal Leakage→
- Agitator Mechanical Seal Failure Modes That Pump Specs Miss→
- API Plan 65A, 65B and 75: How the Leakage Alarms Work and What to Do When They Sound→
- What Is API Plan 31 and When Does the Cyclone Separator Work→
- API Plan 14: Vent Path for Vapor-Prone Seal Chambers→
- What Is API Plan 62 and How Does It Work→
- What Is API Plan 53C and How Does It Work→
- What Is API Plan 53B and How Does It Work→
- What Is API Plan 53A and How Does It Work→
- How to Upgrade Pump Seal Faces From Carbon to Silicon Carbide→
- Sintered SiC vs Reaction-Bonded SiC: How to Choose the Right Seal Face Grade→
- Common Leakage Paths at the Primary Sealing Point→
- External Seal Flush System Components and Their Functions→
- What Grit Lapping Paste to Use for Mechanical Seals→
- API Plan 11 vs Plan 32: How to Choose the Right Seal Flush→
- How to Read Light Bands on Mechanical Seal Faces→
- What Is the Flatness Tolerance for Mechanical Seal Faces→
- How to Troubleshoot Mechanical Seal Lapping Problems→
- Manual vs Machine Lapping for Mechanical Seal Faces→
- 6 Causes of O-Ring Failure in Mechanical Seals→
- Thermal Shock in Ceramic Mechanical Seals: Mechanism, Diagnosis, and Prevention→
- 7 Symptoms of Mechanical Seal Spring Failure→
- Mechanical Seal MTBF: How to Calculate, Benchmark, and Improve It→
- How Does Thermal Distortion Affect Seal Faces→
- Factors That Influence Mechanical Seal Leakage Rate→
- How to Detect and Measure Mechanical Seal Weepage→
- How Pump Vibration Destroys Mechanical Seals→
- Seal Face Material Cost Comparison: Purchase Price, Service Life, and Total Cost of Ownership→
- How to Configure a Double Mechanical Seal for Chemical Pump Service→
- Antimony vs Resin Impregnated Carbon: Match the Grade to the Failure Mode→
- API 682 Seal Pot Requirements by Plan Type→
- How to Size a Seal Pot for Dual Mechanical Seals→
- Synthetic vs Mineral Oil for Mechanical Seal Barrier Fluid→
- Double Mechanical Seal Failure Modes: Diagnosis and Corrective Actions→
- How to Choose a Barrier Fluid for a Double Mechanical Seal: Water, Glycol or Oil→
- What Information Do You Need to Order a Mechanical Seal→
- Can You Upgrade From an Unbalanced to a Balanced Mechanical Seal?→
- How Much Does a Seal Water Flush System Cost?→
- Premature Mechanical Seal Wear: 4-Step Diagnostic Workflow→
- How to Select a Mechanical Seal for a Food-Grade Pump→
- John Crane vs Flowserve Mechanical Seals: How to Choose the Right One→
- Mechanical Seal Material Chemical Compatibility Chart→
- Should You Repair or Replace a Mechanical Seal with Scoring and Grooving?→
- What Causes Mechanical Seal Spring Failure and How Do You Replace It?→
- What Should Be Included in a Mechanical Seal Repair Service Contract?→
- Why Do Repaired Mechanical Seals Fail Again and How Can You Prevent It?→
- Seal Chamber Pressure Monitoring: How to Spot Seal and Pump Trouble Early→
- Pulp and Paper Mill Pump Seals: Fiber Handling→
- How to Identify Mechanical Seal Seat Types: A Field Guide→
- API Plan 11 vs Plan 21: When Does Cooling Actually Help?→
- How to Replace Seal on Grundfos Pump→
- ANSI vs API Mechanical Seal Standards: What Actually Differs at the Seal Level→
- API 682 vs DIN EN 12756 Mechanical Seal Standards→
- Mechanical Seal for Corrosive Media: Material Selection→
- How to Find a Reliable Mechanical Seal Supplier→
- How to Install a Mechanical Seal in a Horizontal Split Case Pump→
- Troubleshooting Mechanical Seal Leak After Installation→
- OEM Mechanical Seal Supply: Partnership Guide→
- Agitator and Reactor Mechanical Seal Selection Guide→
- Mechanical Seal Requirements for the Pharmaceutical Industry→
- HVAC Chiller Pump Mechanical Seal Troubleshooting Guide→
- NBR vs EPDM: How to Choose the Right Elastomer for Your Seal Application→
- FKM vs EPDM: How to Choose the Right Elastomer for Your Mechanical Seal→
- Throat Bush vs Throttle Bush: Complete Technical Comparison→
- How to Calculate Required Seal Water Flow Rate for My Pump→
- What is the PV Value in Mechanical Seals→
- How to Identify Elastomer Type in a Mechanical Seal→
- How to Read Part Numbers on a Mechanical Seal→
- Procedure for Upgrading a Pump from Single to Double Seal: A Complete Step-by-Step Guide→
- Troubleshooting Guide for a Leaking Double Mechanical Seal→
- How to Select a Mechanical Seal for a High-Pressure Pump→
- How to Calculate Flush Flow Rate for Mechanical Seals: A Step-by-Step Guide→
- Single Seal vs Dual Seal Flush Plans→
- How to Select the Right Mechanical Seal Flush Plan: A Step-by-Step Guide→
- Maintenance Checklist for Mechanical Seal Flushing Systems→
- Best Mechanical Seal Flushing Plan for High Temperature Service→
- Troubleshooting Common Mechanical Seal Flush Problems→
- Calculating Spring Load for a Mechanical Seal→
- Types of Mechanical Seal Springs→
- Can I Upgrade From Gland Packing to a Mechanical Seal→
- Cost of Mechanical Seal Replacement vs Repair→
- How to Measure Pump Shaft Runout Before Seal Installation→
- How to Install a Mechanical Seal in a Vertical Pump→
- How to Calculate Heat Generation in a Dry Running Seal→
- Materials for Dry-Running Mechanical Seals→
- Signs of a Dry-Running Mechanical Seal in a Pump→
- How Many Mechanical Seals Does a Pump Have?→
- How to Remove a Mechanical Seal Without Damaging the Shaft→
- Can a Mechanical Seal Be Reused→
- How to Replace the Mechanical Seal on a Water Pump→
- How to Calculate Suction Pressure (and What It Means for Your Mechanical Seal)→
- Seal Chamber Pressure Calculation and Formula→
- What Is a Bellows in Mechanical Seals→
- Can You Touch a Mechanical Seal?→
- Mechanical Seal Face Material Combinations: Selection by Operating Conditions→
- Mechanical Seal Arrangement Types→
- How to Calculate Mechanical Seal Compression: Formula, Percentages, and Worked Example→
- Dual Seal Reservoir Troubleshooting Checklist→
- How to Commission a Seal Pot System for Plan 52, 53A, and 53B→
- How to Fill and Pressurize a Dual Seal Reservoir→
- Tandem Seal vs Double Seal: How to Choose the Right Arrangement→
- How to Calculate Mechanical Seal Heat Generation→
- How to Test a Mechanical Seal Step by Step→
- When to Replace Gland Packing With a Mechanical Seal: Sizing Considerations→
- How to Measure a Stuffing Box for Packing or Seal Replacement→
- What Is the Difference Between Welded Bellows and Formed Bellows→
- Pump Cooling Seal Systems: A Practical Guide to Every Method→
- Parts of a Dual Seal Assembly: Complete Breakdown→
- What Is the Opening Force of a Mechanical Seal→
- API Plan 21 vs Plan 23: When Each Flush Plan Is the Right Choice→
- What Is the Difference Between API 610 and API 682→
- What Is a Face-to-Face Mechanical Seal Arrangement→
- How Do You Calculate Sealing Pressure→
- What Is a Seal Chamber in a Pump→
- What Is the Difference Between a Seal Chamber and a Stuffing Box→
- What Is a Quench in a Mechanical Seal→
- What Is External Flush for a Mechanical Seal→
- What Is Seal Chamber Flushing and Why It Matters→
- What Is the Shaft Tolerance for Mechanical Seals→
- What Is a Thermosyphon System for Mechanical Seals→
- Stuffing Box Pressure in Centrifugal Pumps→
- What Is a Wave Spring Mechanical Seal→
- How to Select the Right Welded Metal Bellows Seals→
- Pressurized vs Unpressurized Mechanical Seal: How to Choose→
- What Is a Sealing Gland and How Does It Work→
- What Is a Pusher Mechanical Seal and How Does It Work→
- What Is a Tandem Mechanical Seal (API 682 Arrangement 2)→
- What Is Hydraulic Balance in a Mechanical Seal→
- What Is a Floating Bushing in a Mechanical Seal→
- Flatness of a Mechanical Seal Face→
- What Is an Elastomer in a Mechanical Seal→
- What Is a Carbon Graphite Seal Face and How to Choose the Right Grade→
- Should You Oil a Mechanical Seal Before Installation→
- What Is a High-Speed Mechanical Seal and When Do You Need One→
- What Is a Gland Plate in Mechanical Seals→
- EPR vs EPDM: What Seal Engineers Need to Know→
- Throat Bushing: Inboard Flow Restriction Explained→
- Pusher vs Bellows Mechanical Seals: How to Choose→
- What Kind of Lubricant Is Used for Mechanical Seals→
- Mechanical Seal vs Bearing: What Is the Difference?→
- How to Set Mechanical Seal Compression Step by Step→
- API Plan 53A vs 53B vs 53C: Pressurization Compared→
- API Plan 52 vs 53: Buffer vs Barrier Fluid Explained→
- API Plan 53A vs 54: Reservoir vs Supply Compared→
- PTFE vs EPDM for Pump Mechanical Seals: The Downsides the Spec Sheet Hides→
- Do Mechanical Seals Need Cooling?→
- 5 Types of Agitator Seals and How to Choose the Right One→
- What Is Acceptable Mechanical Seal Leakage→
- How Long Do Mechanical Seals Last?→
- Type 1 vs Type 21 Mechanical Seals: Design Differences and Selection Criteria→
- Inside-Mounted vs Outside-Mounted Mechanical Seals→
- High-Pressure Mechanical Seals: What They Are and How They Work→
- How to Select Mechanical Seals for High-Temperature→
- Pusher vs Non-Pusher Mechanical Seals: How to Choose the Right Design→
- Double Mechanical Seal Cooling Systems: How They Work and Why They Fail→
- How to Install a Split Mechanical Seal: Step-by-Step Field Guide→
- How to Measure a Mechanical Seal for Replacement→
- What Are Split Mechanical Seals→
- How to Repair a Mechanical Seal Step by Step→
- Bellows Mechanical Seals: How They Work, Types, and Selection→
- What Are Gas Lubricated Mechanical Seals and How Do They Work→
- 3 Types of Double Mechanical Seal Arrangements and When to Use Each→
- What Are Dry Running Mechanical Seals→
- Static vs Dynamic Leak Testing: Why They Catch Different Seal Failures→
- 5 Types of Shaft Seals and When to Use Each One→
- Axial Seals vs Radial Seals: How Groove Design Decides the Winner→
- Agitator Mechanical Seals: Why Pump Seal Specs Fail on Mixers→
- Carbon vs Silicon Carbide Mechanical Seal: 3 Duties Where SiC Is the Wrong Upgrade→
- How to Calculate Mechanical Seal Leakage Rate Using the Poiseuille Equation→
- Internal vs External Flush for Mechanical Seals: How to Choose the Right Arrangement→
- Carbon vs Ceramic Seal Faces: Properties, Limits, and When to Switch→
- Silicon Carbide vs Tungsten Carbide Mechanical Seal→
- 4 Sealing Points of a Mechanical Seal and What Each One Does→
- Installing a Cartridge Mechanical Seal on a Pump: Step-by-Step Guide→
- How to Lap Mechanical Seal→
- 12 Reasons for Mechanical Seal Failure→
- Double Mechanical Seal: Types, Working Principle, and When You Need One→
- 6 Types of Mechanical Seals for Centrifugal Pumps→
- Labyrinth Seal vs Mechanical Seal: Which Belongs on Your Pump Shaft→
- What Is a Pumping Ring in a Mechanical Seal→
- Mechanical Seal Materials: Properties, Limits, and Selection Guide→
- What Is a Seal Pot and How Does It Work in Pump Sealing Systems→
- How to Select the Right Mechanical Seal for Your Pump→
- Balanced vs Unbalanced Mechanical Seal: The 20 bar Rule and Balance Ratio Formula→
- Mechanical Seal Lubrication: How the Fluid Film Actually Works→
- Do Mechanical Seals Require Seal Water?→
- Mechanical Seal vs Oil Seal: Which Belongs on Your Pump Shaft→
- Mechanical Seal Flush vs Quench: How They Work Together→
- How to Identify a Mechanical Seal for Replacement→
- Seal Support Systems: Types, Components, and How to Choose One→
- What Is the Difference Between Single and Double Mechanical Seals→
- Buffer Fluid vs Barrier Fluid: How to Choose the Right Dual Seal Service→
- API Plan 23→
- API Plan 13→
- API Plan 32→
- API Plan 11: How Discharge Recirculation Flush Works→
- API Plan 52 Explained: Unpressurized Buffer Fluid for Arrangement 2 Dual Seals→
- API Plan 54→
- API Plan 21→
- Top 10 Mechanical Seal Manufacturers in China: What Each One Can Prove→
- Top 10 Mechanical Seal Manufacturers in the World: What Each One Builds for Pumps→
- Top 10 Mechanical Seal Manufacturers in India→
- API vs Non-API Mechanical Seals: Scope, Not Quality, Defines the Choice→
- API 682 Piping Plans: Classification and Selection→
- Gland Packing vs O-Ring: How to Choose by Operating Conditions→
- Mechanical Seal vs Dry Gas Seal: Which One Belongs on Your Pump?→
- Parts of a Mechanical Seal→
- What Is the Difference Between Gland Packing Seal and Mechanical Seal→
- How to Install a Mechanical Seal Without Leaks→
- Component vs Cartridge Mechanical Seals: How to Choose the Right Design→
- What Is a Mechanical Seal→
- Grundfos Mechanical Seal Replacements→
- Type 21→
- Burgmann MG1 MG12 MG13 MGS20→
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