Pikotek® PGE System Isolating Gaskets/Kits

PRODUCT TYPE: Flange Isolation-Pikotek

The PGE™ was designed to give operators an alternative to the failure prone phenolic-based isolating gaskets.

Pikotek® PGE™

The Pikotek® PGE™ is a low-pressure service isolation kit designed for electrical flange isolation and/or general sealing applications

The PGE™ was designed to give operators an alternative to the failure prone phenolic-based isolating gaskets. The unique design of the PGE™ system incorporates patented overlapping and offsetting seal grooves. The purpose of this design is to break each layer of laminate within the gasket itself, thereby creating a barrier through which fluid and/or gas cannot migrate. The sealing element can be any elastomeric material, as well as more sophisticated spring-energized PTFE lip seals. As a result of this advanced seal design, maintenance-free flange isolation and flange face corrosion mitigation are achieved economically. Depending upon the sealing element selected, the PGE™ is rated for most hydrocarbon and water service applications.

This gasket is suitable for use in raised-face and flat-face flanges in ANSI Class 150, 300 and 600 service (or equivalent). In addition to providing electrical isolation, the gasket is excellent for isolating flanges made of dissimilar metals or where prevention of flange face corrosion is desired.

Features and Benefits

  • High-reliability, low-pressure sealing system
  • Provides excellent electrical isolation for cathodic protection systems
  • Overlapping seals eliminate potential leak/weep path in the laminate material
  • Choice of spring-energized PTFE or O-ring pressure activated seals
  • Protects against flange face corrosion and flow-induced erosion
  • Available in ring (type F) style or full-face (type E) style
  • Superior sealing solution for low-pressure (ANSI class 150, 300 and up to 600) service
  • Pressure-activated seals provide high confidence sealing
  • High-strength laminate material resists failure due to excessive compression (i.e. over tightening bolts)
  • Reinforced laminate retainer material provides excellent isolation for cathodic protection systems
  • Isolating kits always include high-strength double washers and full-length sleeves for maximum assurance against shorting
  • Gasket is sized to the bore, which protects flange faces from media-induced corrosion and flow-induced erosion
  • Mitigates galvanic corrosion in dissimilar metal flanges
  • Developed from proven PSI/Pikotek sealing technology
  • Spring-energized PTFE seal provides radial load and encapsulation in the seal groove, which eliminates cold flow
  • Also available with a variety of elastomeric seals
  • Easy installation, make up and removal
  • Low required bolt loads. Less make-up force is required, resulting in less flange and bolt stress
  • Self-aligning and self-centering gasket is quick to install
  • No special tools are required
  • Maintenance-free, corrosion-resistant design

Applications

The PGE™ is an excellent choice for isolating distribution lines and transport lines for gas, oil and water. The screened version is the best available product for filtering welding slag, rocks, nuts, bolts and other particulates from traveling downstream and damaging valves, pumps, compressors, etc. Because the PGE™ has near zero creep relaxation, it performs well in heat exchangers, applications with high vibration or excessive thermal cycling.Isolation Kits

In order to electrically isolate the two flange faces, isolating sleeves and washers are required. To protect your investment in flange isolation, provided is full-length sleeves and double washer sets (i.e. one isolating washer for each end of the bolt). All isolating washers are made of GRE and have a compressive strength of 60,000 psi. Two metal washers are also provided for each sleeve.

Isolating sleeves made from GRE and Mylar are offered. The metal washers are either zinc-plated 1050 carbon steel, stainless steel or HCS washers. Other custom materials are available on request. The HCS washer is the preferred washer selection.

Isolation Kits

In order to electrically isolate the two flange faces, isolating sleeves and washers are required. To protect your investment in flange isolation, GPT only provides full-length sleeves and double washer sets (i.e. one isolating washer for each end of the bolt). All isolating washers are made of GRE and have a compressive strength of 60,000 psi. Two metal washers are also provided for each sleeve.

GPT offers isolating sleeves made from GRE and Mylar. The metal washers are either zinc-plated 1050 carbon steel, stainless steel or HCS washers. Other custom materials are available on request. The HCS washer is the preferred washer selection.