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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.

glouds 3196
Why Choose FBU

Fits the first time

Every seal is engineered to your pump data — shaft size, gland dimensions, rotation. No surprises at install, no second trip to the site.

Fast, from stock

Standard cartridge seals ship in 7 business days from stock. Your customer's process gets back online while an OEM is still quoting lead time.

You keep the customer

FBU works behind your name. Your brand, your aftermarket, your relationship — we stay the manufacturer you never have to disclose.
Our Certification

API Spec Q1

API

ISO 9001:2015

ISO9001

ISO 14001:2015

ISO14001

ATEX

ATEX

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.
Or you may contact us directly via the contact information below.
Home contact
What Can FBU Do

Choose a Standard Product

GDM

Partial customization upon request

内芯
chejian2
Sleeves, glands, seal ring holders and other critical parts machined in-house
caisi2
Dimensional inspection
wuzhouwuliandong
Critical seal components machined by five‑axis five‑linkage CNC equipment
qimixing
Factory assembly and air-leak testing
shiyantai
Dynamic Test Bench
jiaofu
Delivered Products

Machined In-House

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

ZEISS Coordinate Measuring Machine

High-precision dimensional inspection by ZEISS CMM for tight tolerance control.

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.

Dynamic Test Rig

Dynamic testing can be arranged according to project scope and customer requirements.

Complete Delivery

Each cartridge seal includes ID & installation data, with inspection records retained for traceability.

API Spec Q1 · 10th Edition

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

Don’t just take our word for it.Click the button below to view it for yourself online.
Successful Cases
Seal for Flowserve® Durco Mark3 Pump

Seal for Flowserve® Durco Mark 3 Pump

Seal for Goulds® 3196 Pump

Seal for Goulds® 3196 Pump

labyrinth

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.