Make: Dresser Rand

Model: DR353

Industry: Oil & Gas

Challenge
Excessive steam leakage on a DR353 Dresser Rand process steam turbine caused by carbon ring wear lead to rust in the gland box, accelerated wear and premature bearing failure due to ingress of condensate in the bearing housing.

Inpro/Seal Sentinel Floating Brush Seal (FBS)

Solution
Replaced two upstream carbon rings on each side of the exhaust and steam ends with Inpro/Seal® Sentinel® Floating Brush Seals (FBS). The Sentinel FBS is designed as a drop-in replacement for existing carbon rings so rotor removal is not always necessary and only minimum housing modifications may be required for location of the anti-rotation pin.

Inpro/Seal Food Steam Turbine Bearing Isolator and Sentinel Floating Brush Seal (FBS)

Bearing protection was further enhanced by installing Inpro/Seal Steam Turbine Bearing Isolators to protect the bearings from steam leakage entering the bearing housing.

After: Installation of Sentinel Floating Brush Seals and Bearing Isolators

Result
Steam leakage was dramatically reduced, increasing mean time between repair (MTBR), reducing maintenance costs and improving health and safety.

The seals have been running trouble free for more than 4 years. The customer has since further upgraded four more of their DR353 turbines.