Type 93LR

Segmented Lift-off Carbon Bushing (Non-contacting) Separation Seal

The Type 93LR is a non-contacting segmented bushing seal with a balanced lift-off carbon design that minimizes the gas consumption in both pressure and flow control. Applications include centrifugal compressors and other mission-critical rotating equipment in the oil & gas and petrochemical industries. Separation gas (normally nitrogen or air) is injected between the two segmented bushings, effectively creating a pressure barrier between the bearing and dry gas seal cavity. The Type 93LR has been designed to meet the requirements of the API 692 standard and it has the ability to be retrofitted to installed separation seals in the John Crane product range with minimum modifications. Advanced materials and design eliminate wear under normal running, promoting long service life.

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Features
Parameters
Recommended Applications
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Features

California Residents: PROPOSITION 65 WARNING
Balanced, lift-off carbon ring minimizes gas consumption in both pressure control and flow control
Self-centralising grooves ensure dynamic seal concentricity to the shaft/sleeve
Patented segment joint design, proven to successfully restrict oil migration and seal leakage
Static restriction to oil ingress when separation gas is off
Temperature independent separation gas consumption
No restriction to gas type or dew point

Parameters

TEMPERATURE LIMITS: -58°F to 392°F/-50°C to 200° C
Speed Limits: 430 fps/130 m/s
Size Limits: 1.57 inch to 11.81 inch / 40 mm to 300 mm, with sleeve to fit all imperial or metric shafts