27 May, 2020

John Crane launches new separation seals (Mar 09)

20 May, 2009

John Crane has launched two new separation seals that are claimed to offer a proven solution to the problems of oil penetrating from a compressor bearing into an outboard gas seal, and the ingress of process gas from the outboard stage of the gas seal into the bearing cavity. The Type 83 and Type 93FR seals are designed primarily for turbomachinery applications and between them they offer a choice of contacting or non-contacting operation.
Both products are said to offer a number of significant benefits to the end user. John Crane’s state-of the-art testing facilities in the UK – which include a vertical shaft movement assessment capability – have been used to complete rigorous testing of the technology that lies behind these seals and they are already finding increasing acceptance from a wide range of international customers.
The Type 83 uses a contacting carbon bushing to isolate the bearing oil from the dry gas seal cartridge. The seal combines advanced materials and design principles which minimise wear and promote improved reliability over a long operational life. The Type 83 is also designed to operate when ultra-dry nitrogen, irrespective of dew-point, is used as the separation gas and injected between the two segmented bushings to create a pressure barrier between the bearing and the dry gas seal cavity.
The Type 83’s universal design accommodates either direction of shaft rotation. It also incorporates a carbon bushing segment design with self-adjusting hydropads.The Type 93FR reportedly provides an equally effective and reliable solution to bearing oil ingress into dry gas seals but based on non-contacting operation. It has a floating ring design that incorporates a robust, non-contacting carbon bushing which prevents oil migration, while itsadvanced design features help minimise wear and heat generation under normal running conditions. This promotes long service life and enhanced reliability.


Buyers' Guide Search
Search for UK supplier by name
Browse by Product Group.
Latest IssueTo view a digital copy of the latest issue of Hydraulics & Pneumatics Magazine, click here.

For a FREE subscription please click here

Latest Issue To view a digital copy of the March edition of Hydraulics & Pneumatics Magazine, click here.

For a FREE subscription please click here

Previous IssueTo view a digital copy of the JANUARY/FEBRUARY 2020 issue of Hydraulics & Pneumatics Magazine, click here.

Buyers Guide - July/August Issue 2019To view a digital copy of the Buyers' Guide 2019 issue of Hydraulics & Pneumatics Magazine, click here.

July/August 2019 Annual Buyers Guide Issue
BFPA YearbookTo read the latest BFPA Yearbook, click here
BFPA Training AcademyClick the image to go to the BFPA Training Academy website
Compressed Air & Vacuum Technology Guide 2018To read the official BCAS Compressed Air & Vacuum Technology Guide 2018 click here
Smart Machines & FactoriesSmart Machines & Factories Magazine - the UK's first dedicated journal focusing on the fourth industrial revolution and transforming to a smart manufacturing era.
Offshore Europe JournalOEE
Super Swivels
Hy-Pro FiltrationWEB LOCATOR