John Crane Diamond® Improves Operational Performance on Tungsten Carbide Substrate

John Crane Diamond® Improves Operational Performance on Tungsten Carbide Substrate

Why a Tungsten Carbide Substrate

In certain applications, tungsten carbide offers unique benefits in terms of mechanical properties, including fracture toughness, overall strength and elasticity.

Tungsten carbide substrate is often required on integrally geared, high-speed pumps using a clamped-in mating ring. When the mating ring is clamped between two metallic surfaces, tungsten carbide’s mechanical properties allow it to withstand the clamping. Because of its superior mechanical properties, tungsten carbide can also withstand high-speed centrifugal forces without outside diameter support.

Adding John Crane Diamond® to a Tungsten Carbide Substrate

There are many applications in which adding a seal face technology such as John Crane Diamond to a tungsten carbide substrate can improve mechanical seal performance. Common problems to look for are failure mechanisms such as heat checking, ID chipping, heavy wear and blistering. If evidence of one of these failure conditions is prevalent, adding John Crane Diamond seal face technology to the tungsten carbide substrate can help address these challenges.

John Crane Diamond

Benefits of John Crane Diamond

Diamond is nature’s hardest known substance which leads to reduced face wear. Its low coefficient of friction results in less heat generation. The combination of these two characteristics provides additional protection to seal faces, helping overcome the common challenges mentioned above and extending the life of the mechanical seal.

John Crane Mechanical Seals Challenges

In addition to increasing the mean time between repair (MTBR), adding John Crane Diamond material to a tungsten carbide substrate provides environmental benefits. With less heat generated, the need for cooling water and auxiliary cooling equipment is also reduced, resulting in lower energy consumption and reduced water usage. Compounding these benefits are the associated cost reductions in water consumption, wastewater processing and power usage.

PRODUCT AVAILABILITY: John Crane Diamond is available as an enhancement to many of their most widely used seal families, including:
» T5600 Universal Cartridge Seal Family
» T5800 Slurry Seal Family
» 48VBF Boiler Feed water Seal
» Other High-Performance Sealing Solutions

WHERE IT’S USED: Nearly every industry, including oil and gas, chemical, pharmaceutical, pulp and paper, water and wastewater, power generation and
mining, can use John Crane Diamond to improve reliability and performance of mechanical seals, pumps and other components.

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John Crane Diamond Brochure


Tencarva Machinery Company offers John Crane products in Arkansas, Florida, Georgia, Indiana, Kentucky, Mississippi, North Carolina, South Carolina, Ohio, Tennessee and Virginia. As an authorized John Crane distributor, Tencarva Machinery Company will sell and service and provide all John Crane products.

About John Crane

John Crane is a global leader in rotating equipment solutions, supplying engineered technologies and services to process industries. The company designs and manufactures a variety of products, including mechanical seals and systems, couplings, filtration systems and digital diagnostics technologies. John Crane customer service is accessed through a global network of more than 200 sales and service facilities in over 50 countries. Global reported revenue for fiscal year 2021 was in excess of $1 billion USD. John Crane is part of Smiths Group, a global leader in applying advanced technologies for markets in threat and contraband detection, energy, medical devices, communications, and engineered components.

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Specialized Coatings for Industrial Pumps

Specialized Coatings for Industrial Pumps

Want to extend the life of your pump? Tencarva offers various specialized coatings that can help prevent chemical and abrasive attacks on the metal of your equipment. We offer Belzona and Enecon as well as powder coating and enamels. If you are pumping aggressive chemicals or suspended solids in your fluids get familiar with these coatings to prevent unnecessary headaches from wear and corrosion.

Automatic Dewatering System by ARO Fluid Management

Automatic Dewatering System by ARO Fluid Management

Air Operated Control Solution with Liquid Level Sensing

ARO Dewatering System on siteARO Dewatering System

The ARO® Automatic Dewatering System offers automatic on/off controls for Pro and EXP diaphragm pumps.  A pneumatically controlled Liquid Level Sensor is used to easily control the fluid level within a desired range.  The Automatic Dewatering System will limit the monitoring labor and reduce air consumption by avoiding dry running of the pump.


  • Simple design is easy to setup and use
  • All pneumatic operation eliminates electrical ignition source
  • High/Low level control maintains fluid between established levels
  • Reduces air consumption by avoiding pump dry running
  • Portable system with directly mounted liquid level sensor

Working principle of ARO Dewatering System

Pump Compatibility

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EVO Series™ Electric Diaphragm Pump by ARO Fluid Management

EVO Series™ Electric Diaphragm Pump by ARO Fluid Management

It’s time to EVOlve your expectations of what a pump can do for you. The ARO EVO Series™ Electric Diaphragm Pump offers an exclusive set of proven technologies packaged into one breakthrough pump.

The all-electric diaphragm pump is changing the game in diaphragm pumping. First, it’s not a double diaphragm, rather it’s a tri-chambered diaphragm pump, and it uses a crankshaft-like piston method which is electric motor driven.  It is a positive displacement pump like no other and it can handle anything that an air operated diaphragm pump can but even more efficiently.  It can handle sludge, slurries, pastes, or anything that an air operated diaphragm pump can pump, but without the hassle of the usual drawbacks of needing air.

ARO Electric Diaphragm Pump

  • Integrated encoder
  • No maintenance gearbox
  • Sealless design – no dynamic seals that could allow hazardous fluids to enter the environment
  • Unique 3 chamber design
  • Innovative diaphragm developed exclusively for the EVO Series™ Electric Diaphragm Pump
  • Choice of 5 different materials of construction to handle the most aggressive and corrosive fluids. Select from stainless steel, cast iron, aluminum, polypropylene or conductive polypropylene.
  • Built-in control and monitoring capability
  • Can be controlled with a PLC
  • Built-in motor thermal protection
  • Extended maintenance cycle and smart maintenance schedule
  • Synthetic oil and filtration system for reliable performance over a wide range of temperatures
  • ARO exclusive AC gear motor available in standard (black) safety area version or hazardous duty (red) version

The unique EVO Series™ Electric Diaphragm Pump design provides the confidence to keep your people safe, your processes running and your operating costs down. ARO engineers put the pump through over 20,000 hours of relentless testing at full load conditions with a variety of fluids. The most grueling conditions were replicated in testing and trials to make sure these electric pumps would perform up to your highest expectations. The EVO Series™ pump delivers a flexible solution that can work in a wide variety of applications among the toughest conditions and requirements.

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