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  JOHN CRANE MECHANICAL SEALS
 

 
 
 John Crane 28AT - Gas Lubricated, Non-contacting Gas Seals For Turbo Compressors

Type 28 compressor dry-running gas seals have been the industry standard since early 1970 for gas-handling turbomachinery. Utilizing John Crane's patented spiral groove pattern, these seals are non-contacting in operation.

 During dynamic operation, the mating ring/seat and primary ring/face maintain a sealing gap of approximately 0.0002 in./5 microns, thereby eliminating wear. 

These seals eliminate seal oil contamination and reduce maintenance costs and downtime. Single, double opposed, and tandem cartridge seals are capable of handling a wide variety of gas sealing applications in the gas collection/transmission, refining, chemical and petrochemical processing industries.

  
 
 Quick specs

 Temperature  -140C to 315C
 -220F to 600F
 Pressure  Up to 450 BARG/6,500 PSIG across single stage
 Speed  Up to 200 m/s / 660 fps
 
 
 Features

Mating Ring
Shrouded mating ring prevents secondary damage in the event of a mating ring fracture. 

Leakage
Low-level leakage can be vented to a safe area, used as fuel to drive equipment, or returned to process via a low-pressure ejector. 
 
 
 
1604 Cartridge version of Type 604 High Temperature Metal Bellows Seal
1648 API 682 Qualified Single Cartridge Type
1670 Cartridge version of Type 670 High Temperature Metal Bellows Seal
2100 Fully Unitized Heavy Duty Elastomer Bellows Shaft Seal
2609 Dual Cartridge Version of 609 High Temperature Metal Bellows Seal
2648 API 682 Qualified Dual Unpressurized Cartridge Type "A" O-ring Pusher Seal
270F Heavy Duty Cartridge Seal for boiler feed circuit applications
2800 Gas Lubricated, Non-contacting Cartridge Double Seal For Pumps
2800E Externally Mounted, Gas Lubricated, Non-contacting Cartridge Double Seal For Pumps
2800ER Gas Lubricated, Non-contacting Cartridge Double Seal For Pumps
285 Gas Lubricated, Non-Contacting Single Seal For Cryogenic Pumps
28SC Non Contacting Secondary Containment Seal
3609 Dual Cartridge Version of 609 High Temperature Metal Bellows Seal
3648 API 682 Qualified Dual Pressurized Cartridge Type "A" O-Ring Pusher Seal
3710 Compact Split O-Ring Cartridge Seal For Pumps And Other Rotating Equipment
37FS High Duty Split Elastomer Bellows Seal For Agitators, Mixers and Pumps
37FSB High Duty, Balanced Split Elastomer Bellows Seal For Agitators, Mixers and Pumps
4610 Compact, General Duty Single O-Ring Cartridge Seal
4620 Compact, General Duty Dual O-Ring Cartridge Seal with Pumping Ring
48HP Low Emission, High Pressure O-Ring Shaft Seal For Light Hydrocarbon Services
48LP Low Emission, Low Pressure O-Ring Shaft Seal For Light Hydrocarbon Services
48MP Low Emission, Moderate Pressure O-Ring Shaft Seal For Light Hydrocarbon Services
48SC Dry Contacting Secondary Containment Seal
48XP High performance Cartridge, multi-spring, O-ring pusher seal with Lubrication enhancing and controlled leakage features
502 Unitised elastomer bellows seal
5280D Dry Running Hygenic Vessel and Agitator Seal
5280G Gas Lubricated Hygenic Vessel and Agitator Seal
5280W Wet Lubricated Hygenic Vessel and Agitator Seal
5610 Universal Cartridge Seal Family - Single O-Ring Cartridge Seal
5611 Universal Cartridge Seal Family - Single Elastomer Bellows Cartridge Seal
5615 Universal Cartridge Seal Family - Single Metal Bellows Cartridge Seal
5620 Universal Cartridge Seal Family - Dual O-Ring Cartridge Seal
5625 Universal Cartridge Seal Family - Dual Metal Bellows Cartridge Seal
5860 Heavy Duty Cartridge Slurry Seal
58B General Purpose DIN Balanced, multi spring, O-Ring Pusher Seal
58BLO General Purpose DIN Balanced, multi spring, O-Ring Pusher Seal
58U General Purpose DIN, multi spring, O-Ring Pusher Seal
58URF General Purpose DIN, multi spring, O-Ring Pusher Seal
58URK General Purpose DIN, multi spring, O-Ring Pusher Seal
58URL General Purpose DIN, multi spring, O-Ring Pusher Seal
59B General Purpose DIN, Balanced, multi spring, PTFE Wedge Seal
59U General Purpose DIN, multi spring, PTFE Wedge Seal
59URF General Purpose DIN, multi spring, PTFE Wedge Seal
59URK General Purpose DIN, multi spring, PTFE Wedge Seal
604 High Temperature, Stationary Head Metal Bellows Shaft Seal
606 High Temperature, Rotating Head Metal Bellows Shaft Seal With Lug Drive
609 High Temperature, Rotating Head Metal Bellows Shaft Seal
613 Wet / Dry Running Single Metal Bellows Cartridge Seal
670 Low Temperature, All Hastelloy C Metal Bellows Shaft Seal For Highly Corrosive Fluids
676 Low Temperature, AM350 Metal Bellows Shaft Seal For Mild Corrosive Services
680 Low Temperature, General Duty Alloy-20 Metal Bellows Shaft Seal
CK725/726 Wet Lubricated Mixer and Agitator Seal for DIN steel vessels
CK738/728 Industrial Vessel / Agitator Seal for Steel and Ceramic vessels
FFET Single Cartridge O-Ring Seal
GL1B Formed metal bellows seal for general service
GL1H Unique twin ply cartridge for hygienic & aseptic duites
RREL Balanced single spring cartridge seal for refinery service
SAF screens Double acting cartridge seal for screens
SB1 Single, Heavy Duty Cartridge Seals
SB1A ANSI Heavy Duty Single Cartridge Seals for ANSI Pumps
SB2 Heavy Duty Dual Cartridge Seals
SB2A ANSI Heavy Duty Cartridge Seals for ANSI Pumps
SBW Heavy Duty Single Cartridge Seals with non pressurised quench
SE1 Ahlstar Single Mechanical Seals for Sulzer Ahlstar Pumps
SE1/SE1F ABS Single Mechanical Seals for ABS Pumps
SE2 Ahlstar Dual Mechanical Seals for Sulzer Ahlstar Pumps
SE2 ScrewPumps Double acting cartridge seal for eccentric screw Pumps
SE2C ABS Dual, Cartridge Mechanical Seals for ABS Pumps
SEW ABS Single Mechanical Seals with non pressurised quench for ABS Pumps
SEW Alhstar Single Mechanical Seal with non-pressurised quench for Sulzer Ahlstar Pumps


JOHN CRANE PRODUCTS

 
  JOHN CRANE - SEALOL - FLEXIBOX - METASTREAM - POWERSTREAM - SAFEMATIC - INDUFIL - ORION


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