Products
Vacuum Pumps
Belt Driven PumpsDuoSeal 1374DuoSeal 1376DuoSeal 1380DuoSeal 1397DuoSeal 1399DuoSeal 1400DuoSeal 1402DuoSeal 1405DuoSeal 1400W-01DuoSeal 1402W-01DuoSeal 1405W-01ChemStar 1400N-90ChemStar 1402N-90ChemStar 1376NChemStar 1400NChemStar 1402NCapture CRRBelt Kit 1397ABelt Kit 1399ABelt Kit 1400ABelt Kit 1405AMajor Repair Kit 1373K-06Major Repair Kit 1376K-06Major Repair Kit 1376K-10Major Repair Kit 1380K-04Major Repair Kit 1397K-08Major Repair Kit 1399K-04Major Repair Kit 1400K-04Major Repair Kit 1400K-10Major Repair Kit 1402K-06Major Repair Kit 1402K-10Major Repair Kit 1402K-47Minor Repair Kit 1373K-05Minor Repair Kit 1376K-05Minor Repair Kit 1376K-09Minor Repair Kit 1376K-46Minor Repair Kit 1397K-07Minor Repair Kit 1380K-03Minor Repair Kit 1399K-03Minor Repair Kit 1400K-03Minor Repair Kit 1400K-09Minor Repair Kit 1402K-05Minor Repair Kit 1402K-09Minor Repair Kit 1402K-46Seal Kit 1401EDuoSeal Oil
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Ensuring high efficiency and prolonging the lifespan of your vacuum pump is vital for optimizing performance and minimizing downtime. At Welch, we understand the importance of seamless maintenance, which is why we have developed comprehensive service kits tailored to enhance the operation of your vacuum pump. In addition to regular servicing and oil changes, our service kits provide additional measures to guarantee your vacuum pump's dependable and efficient functionality for years to come.

Maximize Operational Efficiency and Minimize Costly Interruptions

Leverage the benefits of regular servicing to unlock heightened pump performance, improved energy efficiency, and seamless workflow continuity. By following proactive pump maintenance measures, you can lay the groundwork for optimal effectiveness, reliable outcomes, and a secure work environment. This approach serves to mitigate potential challenges, including:

  • Reduced Performance: Over time, wear and tear can diminish the performance of your vacuum pump, resulting in decreased efficiency and compromised vacuum levels. Regularly servicing your pump with our comprehensive service kits allows you to address potential issues proactively, ensuring consistent and reliable performance.

  • Increased Downtime and Costs: Neglecting maintenance can lead to unexpected breakdowns, system failures, and increased repair costs. Downtime disrupts productivity and can have a significant impact on your operations. Welch maintenance service kits effectively address worn components, minimizing the risk of unforeseen interruptions and optimizing the reliability of your vacuum pump, reducing both downtime and associated costs.

  • Energy Inefficiency: A poorly maintained vacuum pump requires more energy to achieve the desired vacuum levels, resulting in higher operational costs. Following maintenance guidelines and employing Welch service kits, you can optimize pump performance, reduce energy consumption, and save on operating expenses.

  • Risk of Component Failure: Failing to service and replace worn components increases the likelihood of unexpected component failures. These failures can lead to costly repairs and potential damage to other system components. Regular maintenance using our service kits mitigates the risk of unexpected breakdowns, ensuring the longevity and reliability of your vacuum pump.

  • Safety Concerns: A well-maintained vacuum pump contributes to a safe working environment. Malfunctioning pumps pose potential hazards and may compromise the integrity of your processes. By adhering to our maintenance recommendations and utilizing Welch service kits, you prioritize optimal pump performance while ensuring the safety and well-being of your operations.

Service Kits

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Major Repair Kit, DuoSeal 1376 with mechanical seal

Major Repair Kit, DuoSeal 1376 with mechanical seal; Enables complete refurbishment of DuoSeal pump 1376B-01.
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Welch pump 1402B-46 minor repair kit w./ mechanical seal

Enables refurbishment of Refrigeration pump 1402B-46. Includes gaskets, seals, valves, o-rings, and mechanical shaft seal.
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Major Repair Kit for DuoSeal Pumps 1402, 1405 | Welch

Major Repair Kit for DuoSeal Pumps 1402, 1405 with mechanical seal enables complete refurbishment of DuoSeal pump 1402B-01.
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Repair Kits - WOB-L Dry Pumps 2522K-03

One Head Service Kit For for Piston Dry pumps 2522.

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Repair Kits - WOB-L Dry Pumps 2534K-03 | Welch

Service Kit For for Piston Dry pumps Model 2534B-01. Buy Welch vacuum accessoires and repair kits on Welchvacuum.com.
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Welch pump 1402B-46 major repair kit w./ mechanical seal

Enables refurbishment of Refrigeration pump 1402B-46. Includes gaskets, seals, valves, o-rings, springs, and mechanical shaft seal.
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Minor Repair Kit - DuoSeal 1400 Pump 1400K-03

Minor Repair Kit, DuoSeal 1400 Pumps with mechanical seal 1400K-03 enables refurbishment of DuoSeal pump Model 1400.
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Repair Kits - WOB-L Dry Pumps 2546K-03 | Welch

Service Kit For for Piston Dry pumps Model 2546B-01. Buy Welch vacuum accessoires and repair kits on Welchvacuum.com.
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Welch CRR CAPTURE pump repair kit w/ mechanical seal | welch

Use with DuoSeal 1373

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Minor Repair Kit for DuoSeal Pumps 1402, 1405 | Welch

Minor Repair Kit for DuoSeal Pumps 1402, 1405 with mechanical seal enables refurbishment of DuoSeal pump 1402N-01.
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ChemStar pump 1402N major repair kit with mechanical seal

ChemStar pump 1402N major repair kit with mechanical seal enables complete refurbishment of ChemStar pump 1402N-01.
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Service Kit for CRVpro4 S3077-99

Service Kit for CRVpro4 S3077-99. Buy your original Welch Vacuum accessories and repair kits on welchvacuum.com.
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Oil-Drain-Kit-S3222-99 | Welchvacuum.com

Oil-Drain-Kit-S3222-99 | Welchvacuum.com. Buy your original Welch vacuum accessories and repair kits on welchvacuum.com
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Service Kit, Two Headed, for WOB-L 2563 - 2563K-03

Service Kit, Two Headed, for WOB-L 2563 - 2563K-03. Buy Your Original Welch vacuum accessories and repair kits on Welchvacuum.com.
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Service Kit for WOB-L Piston Pumps 2500K-04

Service Kit for WOB-L Piston Pumps 2500K-04. Buy Your Original Welch vacuum accessories and repair kits on Welchvacuum.com.
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Repair Kits - Oil Seal Pumps, Direct Drive 8917K

Repair Kits - Oil Seal Pumps, Direct Drive 8905K-03. Shaft seal repair kit for pumps 8907/8912/8917. Available on welchvacuum.com
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Valve Plate Service Kit for 2562 2567 2567K-02

Valve Plate Service Kit for 2562 2567 2567K-02. Buy Your Original Welch vacuum accessories and repair kits on Welchvacuum.com.
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Service Kit ConRod For 2534B-01 Pump 2581K-04

Service Kit ConRod For 2534B-01 Pump 2581K-04. Buy Your Original Welch vacuum accessories and repair kits on Welchvacuum.com.
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Diaphragm Replacement Kit for 2019 Pumps 2019K-01

Diaphragm Replacement Kit for 2019 Pumps 2019K-01 Online. Buy Your Original Welch vacuum accessories and repair kits on Welchvacuum.com.
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Seal Service Kit for 2561 Pumps 2561K-04

Seal Service Kit for 2561 Pumps 2561K-04. Buy Your Original Welch vacuum accessories and repair kits on Welchvacuum.com.
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Service Kit ConRod For 2534B-01 Pump 2581K-04

Service Kit ConRod For 2534B-01 Pump 2581K-04. Buy Your Original Welch vacuum accessories and repair kits on Welchvacuum.com.
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Diaphragm Replacement Kit for 2019 Pumps 2019K-01

Diaphragm Replacement Kit for 2019 Pumps 2019K-01 Online. Buy Your Original Welch vacuum accessories and repair kits on Welchvacuum.com.
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Service Kit ConRod For 2534B-01 Pump 2581K-04

Service Kit ConRod For 2534B-01 Pump 2581K-04. Buy Your Original Welch vacuum accessories and repair kits on Welchvacuum.com.

The 5 Golden Rules for Optimal Vacuum Pump Operation

Adhering to these rules guarantees efficient operation, extends pump life, and delivers uninterrupted vacuum performance:

  1. Regularly Change Your Vacuum Oil: Rotary vane vacuum pumps require regular oil changes using recommended pump oil. Contaminated or discolored oil can lead to premature pump failure. Stay ahead by following the recommended oil change intervals to maintain optimal performance.
  2. Utilize the Gas Ballast for Condensable Vapors: When working with condensable vapors, make use of the gas ballast feature on your vacuum pump. This continuous purge helps prevent condensation inside the pump, extending its service life.
  3. Protect Your Pump from Particulate Matter: Safeguard your vacuum pump from harmful particulate matter by employing an inlet dust filter or an inlet catchpot. These accessories effectively capture particles, preventing damage to the pump and ensuring peak performance.
  4. Properly Manage the Exhaust Port: Always keep the pump's exhaust port open while it is running. This ensures proper flow of gas and prevents excessive backpressure, maintaining efficient operation.
  5. Run the Pump After Use: After each operation, run your vacuum pump with either the gas ballast or the open inlet port. This practice helps purge any remaining contaminants and moisture, preserving the internal cleanliness of the pump.

 

New to Working with Vacuum Pumps? Don’t Worry, We’ve Got You Covered!

If you are new to working with vacuum pumps, our team is here to support you. Read our concise manual or request a free introduction from our experts. Gain confidence and get started with your vacuum pump journey today. Click here to request your free introduction.

Find What You Need in Seconds

If you're maintaining Welch pumps or planning preventive service, the Service Kits / Spare Parts Finder is the fastest way to identify compatible components. Use the product search tool to match your model with the correct parts—no guesswork, no delays.

How It Works

 

  1. Search by Product Name or Number - Enter your pump’s model name or catalog number. The tool auto-suggests as you type.
  2. Filter by Category - Narrow results to “Service Kits” or “Spare Parts” using the filters on the left.
  3. View Compatible Parts - Each product page lists available kits, part numbers, and technical documentation.
  4. Download Resources - Access datasheets, manuals, and exploded views directly from the product page.

Why Use the Finder?

  • Avoid ordering errors by matching parts to your exact model
  • Speed up maintenance with direct links to documentation
  • Reduce downtime by identifying parts before failure

Pro Tip

If you're servicing multiple units or managing inventory, bookmark the search tool and export part numbers into your procurement system. Welch’s catalog numbers are standardized across regions.

FAQs

Service kits typically include gaskets, seals, filters, and other wear components specific to the pump model. Each kit is tailored to a maintenance interval or repair type.