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Complete Cartridge Seals for the Pumps You Repair.

Complete, factory-built cartridge seals for the pumps you repair — ANSI B73.1 and API 610 process pumps, discontinued models and hard-to-source applications. Send the pump or seal details you have. FBU configures, builds and air-leak tests the complete cartridge.

For Independent Pump Repair Service
Proven Seal Core Critical Metal Parts Machined In-House Factory-Assembled

100% Air-Leak Tested

process centrifugal pump

THE PROBLEM

Your Customer Needs the Pump Back.You Need the Right Seal.
When a pump is down, the seal is often the bottleneck. These are the problems FBU is built to remove from your repair process.

Fit & Compatibility

If even one dimension is off, the seal won't go on the pump.


Every FBU seal is engineered to match your data, so there are no surprises during installation.

Lead Time

Your customer's process cannot wait OEM 8-16 weeks for a standard replacement.
FBU shortens OEM lead times: standard models ship from stock in 7 business days.

Delivery

All you get is a seal in a box — no way to verify material specifications or certifications.
Every FBU shipment includes a fully tested cartridge seal, installation instructions, and a unique serial number for easy reordering.

Aftermarket

Revert to OEM‑seal supplier; only service‑related business will be maintained.
FBU handles the engineering and the manufacturing behind the scenes — you keep your customer, your brand, and your aftermarket.

THREE WAYS TO START

Use what is already proven.
Engineer only what your equipment needs.
Choose a standard product, configure a mature FBU platform for your equipment, or begin a controlled new-development project.

01 · READY ROUTE

Choose a Standard Product

Start with an existing complete cartridge seal where the product and application requirements already align.

02 · PLATFORM ROUTE

Configure a Mature Platform

Start from a mature FBU design and configure the equipment fit, materials and agreed documentation.

03 · NEW‑DEVELOPMENT ROUTE

Develop a New Seal Architecture

When an existing product or mature platform does not fit, begin a controlled engineering and validation project.

MANUFACTURING

From Drawing to Shipment.

One Controlled Route.

Machining, inspection, assembly and testing happen under one roof — so the seal you receive matches the drawing you approved, and the next one matches it too.

01

Engineer

02

Machine

03

Inspect

04

Assemble & Test

05

Release for Repeat Supply

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Sleeves, glands, seal ring holders and other critical parts machined in-house
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Dimensional inspection
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Critical seal components machined by five‑axis five‑linkage CNC equipment
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Factory assembly and air-leak testing

Machined In-House

Sleeves, glands, drive rings, seal ring holders and other critical metal parts.

Factory-Assembled

Complete cartridge construction—not loose components for new-seal assembly.

100% Air-Leak Tested

Every complete cartridge seal receives factory air-leak testing.

SAP + PLM Controlled

BOM, drawing revision, order, quality and traceability records are controlled digitally.

API Spec Q1 · 10th Edition

Certificate Q1-5423 · Design, manufacture and sale of mechanical seals for the oil and gas industry.

Precision-Manufactured. · Factory-Validated. · Digitally Traceable.
COMPLETE DELIVERY

COMPLETE DELIVERY

Every FBU cartridge seal is supplied with clear product identification and installation information, with inspection
records retained for traceability.
Your team installs it right the first time and can trace it for its entire service life.

Clear product identification

A Certificate of Conformity

A unique serial number

An air-leak test report

An outline and installation drawing

Packing documentation

Test bench

PROTOTYPE AND DYNAMIC VALIDATION

A new architecture must be validated before it becomes a mature platform.
New seal architectures complete applicable dynamic validation before formal release. Dynamic testing can also be arranged across FBU’s complete mechanical-seal product range according to project scope and customer requirements
Mature-platform repeat orders do not require every unit to repeat platform-level dynamic validation.

Test limits, conditions, records and approved evidence can be reviewed within the relevant project or customer-audit scope.

Shipment-test boundary: every applicable complete cartridge seal is air-leak tested before shipment. Dynamic validation and routine shipment air-leak testing are different controls.

SUCCESSFUL CASES

Field cases from FBU
Real applications, verified performance, and the data you need to specify with confidence.
Seal for Flowserve® Durco Mark3 Pump

Seal for Flowserve® Durco Mark 3 Pump

Seal for Goulds® 3196 Pump

Seal for Goulds® 3196 Pump

QUALITY MANAGEMENT AND CERTIFICATE SCOPE

Recognized systems. Claims kept inside their scope.
Management-system certifications and product certificate scope are shown separately so customers can understand what each document actually covers.

API Spec Q1

10th Edition · Registration Q1-5423 · Valid through April 22, 2028. Scope: design, manufacture and sale of mechanical seals for the oil and gas industry.

QMS CERTIFICATION

ISO 9001:2015

LRQA Approval 00045125 · Certificate 10614905 · Valid through June 12, 2027. Scope includes design, production and custom processing of mechanical seals.


QMS CERTIFICATION

ISO 14001:2015

LRQA Approval 00050926 · Certificate 10726764 · Valid through October 26, 2028. Scope includes design, production and customized processing services of mechanical seals.

EMS CERTIFICATION

ATEX

EUROCERT 25 ATEX 0599 · Technical documentation receipt certificate · Valid through February 8, 2036. Applies only to the listed product models, configurations and markings.

PRODUCT SCOPE APPLIES

Clear API boundary: API Spec Q1 registration is a quality-management-system certification. It is not a blanket API product certification, API Monogram authorization or API 682 product approval.

PUMP REPAIR PROGRAM

Start with the pump
already in your service.
Send the pump model, dimensions or existing seal. FBU defines a repeatable complete cartridge configuration for recurring repair work.

Complete Cartridge Seals for the Pumps You Repair.

Home contact

Not sure of the model? Send a photo — we'll identify it.

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CONTACT US

  sales@fbuseals.com

  +86-512-57011188

  No.183 , Yinhe Road, High Tech Industrial Development Zone Changshu Suzhou, Jiangsu, China Postal Code: 215533

Copyright © 2026 FBU Sealing Technology (Suzhou) CO.Ltd. All Rights Reserved.