Chemical
Process efficiency. Environmental safeguards.
Handling aggressive and hazardous media requires technologies that perform consistently under pressure and comply with rigorous global standards.
With proven engineering experience, our solutions can help safeguard reliability, minimise operational risk and support efficient, compliant chemical processes.
From dewatering chemicals to high-pressure, high-speed polymerising fluids, high-temperature acids and solvents, our solutions for the chemical industry meet global standards, such as Volatile Organic Compounds (VOC) and Volatile Hazardous Air Pollutants (VHAP), as well as international standards such as API, DIN and ANSI.
John Crane solutions for the chemical industry
Chemical processing is constantly evolving, and John Crane’s sealing and support technologies have been adapting since 1917 to meet these changes.
Vessel, mixer and agitator seals
Our vessel, mixer and agitator seals enhance equipment safety and performance while complying with strict industry standards such as ISO 9001:2008, DIN and ATEX certification.
Our advanced technologies include wet-running, dry-running and cutting-edge gas lift-off, non-contacting mechanical seals. Our seals are equipped with optional features including support bearings, debris wells, temperature measuring probes and cooling flanges. Constructed from materials compatible with both steel and glass-lined applications, our seals maintain product purity and reduce potential risk in mission- critical chemical and petrochemical processes.
More about our vessel, mixer and agitator seals
Pump seals
Our mechanical pump seal range is among the most comprehensive in the industry, covering all chemical plant needs from compact elastomer bellows seals to dual cartridge seals that simplify maintenance.
Elastomer bellows seals offer cost-effective solutions for varied services. Cartridge seals are easy to install and available in single, dual, metal bellows and O-ring designs. Split seals suit large, hard-to-access equipment.
For extreme conditions, metal bellows seals deliver proven performance. When emissions must be controlled, non-contacting seals like the Type 2800 series ensure zero-emission compliance.
More about our pump seals
Compressor seals
Our product portfolio of compressor seals, either dry gas or separation, covers a wide range of applications and provides low-risk solutions alongside optimal performance and reliability.
All of our seals are built to meet all international and customer standards, including API 692, and, as a pioneer of dry gas seal technology, John Crane has more installations in turbomachinery products than any other sealing manufacturer.
More about our compressor seals
Filtration
Quality is at the core of everything we do. Our filter systems and replaceable filter elements are manufactured adhering to the highest quality standards, ensuring reliability and efficiency in your operations.
We understand that filtration is more than just a process, it’s a critical pathway that uses our market-leading technologies to maximise equipment reliability, enhance productivity, reduce environmental impact and ensure sustainable operations by delivering scalable solutions.
Innovative filtration solutions, including process gas and liquid filtration systems, plus fully welded, stainless steel filter elements ensure process purity in process flows.
More about our filtration solutions
Power transmission couplings
Power transmission couplings are ubiquitous across various industries, each with unique power transfer and motion control requirements.
At John Crane, we understand that compliance with standards such as ATEX, ANSI, API 610 and API 671 is crucial, enhancing reliability, safety, and performance and ensuring regulatory adherence.
More about our power transmission couplings
Seal face technologies
Our comprehensive suite of seal face technologies is designed to overcome rigorous sealing challenges, including limited seal face lubrication and severe service duties that adversely affect reliability, operational costs and seal life.
Derived from nature’s hardest substance, John Crane Diamond® uses ultrananocrystalline diamond, a thin film of genuine diamond grown via chemical vapour deposition, on the seal face. Only John Crane integrates this technology directly into our manufacturing process, bringing you expertise in seal and face treatments, along with reliable adhesion.
More about our seal face technologies
Supporting your sustainability journey in chemical processing
Today, we are leveraging our legacy of resource efficiency, emissions reduction and circularity to help our customers achieve their mission-critical sustainability goals – without sacrificing the reliability that earned us the industry’s trust more than a century ago.
Our commitment to sustainabilityJohn Crane Performance Plus™
Further reading
Upgrading wet-running agitator seals to dry-running seals for greater reliability
The right chemistry: Why choosing the right mechanical seal and support system is vital to risk management in ATEX environments
Overcoming four significant sealing challenges in chemical and petrochemical environments
Mechanical seals: Reducing fugitive emissions in chemical processing
Part 1: Sustainable solutions to practical challenges for operators
Mechanical seals: Reducing fugitive emissions in chemical processing
Part 2: Mechanical seals, seal support systems and alternative solutions
Chemical processing: Mechanical seals – where sustainability starts
Part 1: How technology choices future-proof the chemical industry
Chemical processing: Mechanical seals – where sustainability starts
Part 2: Support solutions options for the chemical industry
Upstream Pumping (USP): Supporting chemical plant processing
Part 1: The realities of chemical industry processing, and how USP can help
Upstream Pumping (USP): Supporting chemical plant processing
Part 2: The innovations supporting more sustainable chemical processing
Common questions
What is a mechanical seal used for in the chemical industry?
A mechanical seal is used in the chemical industry to help prevent leaks in pumps, mixers and other rotating equipment. Made from corrosion-resistant materials, these chemical mechanical seals offer a reliable sealing solution for the chemical sector, protecting equipment and ensuring safe chemical containment.
How do John Crane mechanical seals help prevent hazardous fluid leaks in chemical processing?
John Crane offers mechanical seals for the chemical industry designed to provide reliable, controlled sealing of aggressive and hazardous fluids. These advanced sealing solutions maintain stable operating conditions in pumps and rotating equipment, helping to prevent leaks, reduce safety and environmental risks, and ensure compliant, efficient operation across a wide range of chemical processing applications.
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Products
Showing 1–180 of 180 Products
Type 2874HTC
Non-contacting, Metal Bellows, Outward Pumping Dual Pressurized Gas Lubricated Seal
Reliably sealing high and low temperature process fluids up to 425°C (800°F), the Type 2874HTC incorporates unique HTC (high-temperature, corrosion-resistant) metal bellows technology with non-contacting…
Type CK-728 W-D/G/GD Vessel and Mixer Seal
High-performance Modular Mixer and Agitator Seal for Steel Chemical Reaction Vessels — Standard Solutions Comply to Vessel Seal Standard DIN 28138
Type CK 728 is a versatile, high-performance cartridge seal solution for steel vessels applicable in various industries, including high-purity pharmaceutical...
Type CK-736 W-D Vessel and Mixer Seal
Mixer and Agitator Cartridge Seal to Vessel Seal Standard DIN 28138 for Glass-lined Chemical Reaction Vessel — with Integrated Bearing
The Type CK 736 is a dual-pressurized, cartridge seal for glass-lined mixing and agitating equipment with a top-entry agitator shaft.
Type CK-738 W-D/G/GD Vessel and Mixer Seal
High-performance Modular Mixer and Agitator Cartridge Seal for Glass-lined Chemical Reaction Vessels — Standard Solutions Comply to Vessel Seal Standard DIN 28138
Type CK 738 is a versatile, high-performance cartridge seal solution for glass-lined vessels applicable in various industries, including high-purity pharmaceutical...
High-Performance MHS Series Diaphragm Coupling Solutions
M Series Multiple Membrane Straight Diaphragm Coupling with Stainless Steel Discs in Pre-assembled Single Diaphragm Packs
With John Crane’s Metastream® MHS Series coupling range, the torque is transmitted through pre-assembled packs with a built-in safety bush...
MOD Series Diaphragm Coupling Solutions
M Series Multiple Membrane Straight Diaphragm Coupling with Stainless Steel Discs in Pre-assembled Double Diaphragm Pack
With John Crane’s Metastream® MOD Series coupling range, the torque is transmitted through a pre-assembled pack with a built-in anti-fly feature...