Apart from new installations, PSI flange isolations offer the option of converting existing flange connections into a point of electric separation. In doing  so, it is not necessary to make any mechanical changes to the flange connection. The PSI flange isolation sets are available for all popular standards, sizes and pressure rates. PSI flange isolations can be supplied as  individual gasket or complete flange isolation kit. An isolation set DW consists of one isolation sleeve, 2 isolation washers as well as 2 steel washers for each bolt hole. Isolation sets are also available in special sizes.

Double isolation washer set (DW)

The double isolation washer set is used for added protection against short circuit currents at the nuts and bolts. When using the double isolation washer, nuts and bolts are electrically insulated on both sides of the flange. Another important reason is to prevent contact corrosion through flange isolation at flanges out of different metals.

Isolation sleeves

Isolation sleeves are available in the following materials:
• Mylar (standard version)
• Nomex 410
• Phenol
• G-7 (glass silicone composite laminate)
• G-10 (fibre glass composite laminate)
The insolation sleeves are designed for all flange types to be easly inserted into the bolt holes.. PSI insulating sleeves have a wall thickness of 0.3 - -0.8 mm and installed together with isolation and steel washers. They are available for standard American bolt sizes from 1/2” (12.7 mm) to 3 1/2” (88.9 mm) as well as metric bolt sizes from M12 to M52.

Further sizes upon request.

Isolation washers

Isolation washers are available in the following materials:
• Laminated phenolic resin (standard version)
• G-7 (glass silcone composite laminate)
• G-10 (fibre glass composite laminate)
• HCS ( proprietary X37 coating)

PSI isolation washers have excellent isolation properties. The fit is designed so that the isolation sleeve can be inserted through the isolation washer. They are available for standard American bolt sizes from 1/2” (12.7 mm) to 3 1/2” (88.9 mm) as well as metric bolt sizes from M12 to M52. Further sizes upon request.

Steel washers

Steel washers are designed in a way that the isolation sleeve can be inserted through them. Steel washers are available in the following materials:

• Hot-rolled steel ST37, galvanised(standard version)
• Hot-rolled stainless steel s316 (V4A) (special version)