Engineered API 682 Cartridge Seal Packages with Documented Testing and Support Systems.

Complete, factory-built cartridge seals for pumps sourced from China — engineered to your agreed API 682 datasheet and operating duty, with controlled interfaces, factory assembly and air-leak testing before shipment. Send the project and pump data you have; FBU confirms what is known and lists what is missing.

Start an API 682 Seal Program

Submit Pump / Seal Data

For Pump OEMs & Equipment Partners Sourcing Pumps from China

Proven Seal Core Critical Metal Parts Machined In-House Factory-Assembled

100% Air-Leak Tested

THE PROBLEM

Your Duty Should Choose the Seal, Not the Pump-Factory Test.

Sourcing pumps in China can split the responsibility for the mechanical seal. If a pump factory fits a low-cost seal mainly to pass the pump test, that seal may not match your final operating conditions, documentation or aftermarket strategy.

Fit & Compatibility

Lead Time

Delivery

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.

Explore Standard Cartridge Seals

02 · PLATFORM ROUTE

Configure a Mature Platform

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

See How the Platform Works

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.

See Engineering & Validation

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

Sleeves, glands, seal ring holders and other critical parts machined in-house

Dimensional inspection

Critical seal components machined by five‑axis five‑linkage CNC equipment

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.

Book a 30-Minute Teams Factory Tour

COMPLETE DELIVERY

Every FBU cartridge seal is supplied with clear product identification and installation information, with inspection

records retained for traceability.

Install it right the first time at your nominated pump works, and trace the configuration 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

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 WARMAN®-brand Slurry Pumps

LEARN MORE

Seal for FLOWSERVE® BB2 pump

LEARN MORE

Seal for Flowserve® ERPN

LEARN MORE

Seal for Water ring vacuum pump

LEARN MORE

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

QMS CERTIFICATION

View certificate

ISO 9001:2015

QMS CERTIFICATION

View certificate

ISO 14001:2015

EMS CERTIFICATION

View certificate

ATEX

PRODUCT SCOPE APPLIES

View certificate

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.

API 682 SEAL PROGRAM

Start with the pump

you are sourcing in China.

Send the pump model, duty, dimensions or existing seal information. FBU confirms what is known, lists what is missing, and proposes a controlled complete cartridge configuration for your program.

The Right Seal—Before the Pump Leaves China.