BOS Homogenisers Back-Up Rings for High-Pressure Systems

BOS Homogenisers back-up rings are precision-engineered

components designed to support sealing systems in high-pressure

homogenizers. In demanding industrial applications, back-up rings

prevent seal extrusion, maintain sealing geometry and contribute to

stable and reliable machine performance.

As a specialized manufacturer and spare parts supplier,

BOS Homogenisers provides high-quality back-up rings

for BOS MG-series homogenizers as well as compatible Gaulin,

SPX-APV and Rannie machines. With more than 75 years of experience

in homogenisation technology and worldwide distribution, we ensure

reliable spare parts supply for critical production processes.

What Are BOS Homogenisers Back-Up Rings?

Back-up rings are auxiliary sealing elements used together with primary

seals such as O-rings and packing assemblies. In high-pressure

homogenizers, sealing systems are exposed to extreme operating

pressures and continuous mechanical loads.

The primary functions of BOS Homogenisers back-up rings include:

• Preventing extrusion of elastomer seals under high pressure
• Supporting structural stability of primary sealing elements
• Maintaining sealing integrity during pressure cycles
• Reducing deformation caused by mechanical stress
• Extending the service life of the entire sealing assembly

Without properly specified back-up rings, sealing systems may

experience premature wear, leakage or unexpected failure.

Applications in BOS MG-Series Homogenizers

BOS Homogenisers manufactures a complete range of MG-series

high-pressure homogenizers, designed for industrial use in dairy,

food, pharmaceutical, chemical and biotech sectors. These machines

operate at high pressures and require durable, precisely engineered

sealing components.

BOS Homogenisers back-up rings are used in:

• Plunger sealing assemblies
• Liquid end cylinder blocks
• Hydraulic actuation systems
• High-pressure valve housings
• Pressure control systems

Each back-up ring is selected to match the pressure rating,

machine configuration and application requirements of the

specific MG-series model.

Engineered for High-Pressure Performance

High-pressure homogenization subjects internal components

to continuous stress and rapid pressure fluctuations. Back-up

rings must withstand:

• Extreme operating pressures
• Thermal expansion and contraction
• Mechanical vibration
• Exposure to process media
• Dynamic movement of sealing components

Precision manufacturing and strict dimensional tolerances

are essential to ensure consistent sealing performance

and long-term reliability.

Compatible with Gaulin, SPX-APV & Rannie Systems

In addition to supplying parts for BOS MG-series homogenizers,

BOS Homogenisers specializes in spare parts for Gaulin, SPX-APV

and Rannie machines. This allows customers operating mixed

homogenizer fleets to source reliable components from one

specialized supplier.

Our spare parts portfolio includes:

• BOS Homogenisers back-up rings
• O-rings
• Plunger rings
• Packing assemblies
• Plungers
• Homogenising valves
• Valve seats and sealing components

With more than 15,000 spare parts on stock, we ensure fast

response times and global availability.

Importance of Correct Back-Up Ring Selection

Selecting the correct BOS Homogenisers back-up ring is

critical for maintaining machine reliability. Incorrect

dimensions or unsuitable materials may result in:

• Seal extrusion under pressure
• Leakage and contamination risks
• Accelerated wear of primary seals
• Pressure instability
• Unexpected production downtime

Our technical specialists assist customers in identifying

the correct back-up ring based on homogenizer model,

operating pressure and application conditions.

Maintenance and Preventive Replacement

Back-up rings are typically replaced during preventive

maintenance or liquid-end overhauls. Scheduled replacement

helps maintain stable operation and minimizes the risk of

unexpected failures.

BOS Homogenisers supports maintenance teams with:

• Accurate spare part identification
• Technical consultation
• Fast quotation processing
• Efficient international shipping

Global Supply from the Netherlands

Headquartered and manufacturing in the Netherlands,

BOS Homogenisers operates through an established global

distribution network. We provide reliable delivery of

back-up rings and other spare parts to customers worldwide.

Our international presence ensures that industrial

customers receive:

• Short lead times
• Consistent quality
• Technical expertise
• Long-term spare parts support

BOS Homogenisers – Your Back-Up Ring Specialist

Founded in 1950, BOS Homogenisers has developed into a

trusted authority in homogenizer technology and spare parts

supply. Our specialization in BOS, Gaulin, SPX-APV and

Rannie systems makes us a reliable partner for industrial

applications worldwide.

If you are looking for a dependable supplier of

BOS Homogenisers back-up rings,

our team can provide the correct spare part with

technical expertise and global reach.

Contact BOS Homogenisers today to request a quotation

or technical assistance for your back-up ring requirements.

Related BOS Spare Parts

Looking for other BOS Homogenisers spare parts? Browse our complete range of BOS replacement components:

• Bos Homogeniser guide rings – Precision guide rings
• Bos Cylinder Blocks – Precision cylinder blocks
• Bos Homogeniser Actuator Packings – Actuator sealing packings
• Bos Homogeniser Cylinder blocks – Precision cylinder blocks
• Bos Homogeniser Plungers – High-pressure plungers

View all spare parts →

Compatible Alternatives from Other Brands

Looking for back up rings for other homogeniser brands? BOS Homogenisers supplies compatible replacements across all major brands:

Rannie back-up rings | Gaulin back-up Ring | SPX back-up Ring | APV back-up rings