ENSIGN - Venturi Insert - Wide Bore

• Proven design for power station main condensers
• Postpone or completely avoid expensive re-tubes
• Venturi inlet profile
• Self-expanding
• Non metallic, will not create or add to galvanic problems
• Compatible with ball and bullet tube cleaning
• Suitable for new and worn tubes

Protect condenser tubes from inlet erosion / corrosion. Can be used in conjunction with ball and bullet tube cleaning systems.

The ENSIGN Venturi Insert is a high quality self-expanding condenser tube insert designed to protect vulnerable condenser tube inlets. Many millions of units have installed in power station main condensers since their introduction in 1970 enabling power generators to save huge sums by avoiding condenser re-tubes. Custom sizes are available to suit the erosion occurring at your plant. Customers, particularly those with long term experience of the product protecting worn tubes, often now fit to new tubes to prevent inlet erosion/corrosion occurring in the first place.

The water naturally present in a condenser is utilised to expand a full condenser installation into all of the tubes in unison. No need for manual expansion or painting of each individual tube. Very easy and quick to fit by unskilled personnel.

Each Venturi Insert is a perfectly formed ISO standard Venturi Inlet Nozzle, which introduces the optimum inlet profile to the tube inlets. A customer that decided to measure the anticipated pressure drop caused by fitting Wide Bore Venturi Inserts was surprised to find that the inlet profile improvements actually introduced a system pressure gain compared to bare unprotected tubes.

Crude ill fitting metal and plastic inserts are likely to eventually encourage end step erosion. This is often managed my introducing a longer insert after a few years in service. The tube material, insert fit and expansion, flow conditions, coolant composition and insert design and quality are amongst the contributory factors. The particular solid (metal, plastic or ceramic) from which the insert is manufactured is not an influence.

The design and quality of ENSIGN Venturi Inserts has enabled numerous power station installations in erosion prone copper alloy tubes to remain in continuous service for well over 20 years. Our longest recorded service life to date is over 25 years.