Flange Isolation KitsFlange Isolation Kit

Power Dynamics Gasket Company proudly represents Garlock Piping Technologies (GPT Industries) flange isolation products. Isolation products include a wide selection of isolating/sealing gaskets along with a variety of sleeves and washers. For maximum flexibility, components may be ordered separately or as part of complete flange isolation kits.

Flange Isolation Kits are designed to work in conjunction with isolating gaskets.  They complete the electrical isolation of a flanged assembly.

Isolation Kits Include

  • One full-length isolating sleeve
  • Two isolating washers
  • Two steel washers for each of the bolts in the flange assembly

The purpose of the isolating sleeves is to electrically separate the bolts from each side of the flange. The isolating washers provide electrical isolation for each of  the nuts attached to the bolts. This method of isolation provides the user with a high-reliability solution to complete the electrical isolation of a flanged joint.


Flange Isolations Kits are used in locations where one prefers an integral seal element. They offer a more convenient spiral-wound type gasket replacement.
  • Non-potable water
  • Utility gas applications
  • Aliphatic hydrocarbons
  • High pressure flanges
  • Critical service applications
  • High pH Service

GasketSeal Sealing/Isolating System

GasketSeal sealing gaskets are considered to be one of the most effective methods for sealing mating surfaces of all types. The gasket consists of two molded half "O" rings (with precise crown to void ratio) mounted in grooves on opposite sides of a retainer.

LineBacker® 61 NSF Certified Sealing System

LineBacker sealing systems utilize a rectangular sealing element, referred to as a “quad” ring, in combination with a unique groove design to effectively seal and isolate flanges for all types of applications. Used and proven, for over 40 years, in the water and energy industry’s - LineBacker systems have been effectively sealing flanges within piping systems carrying potable water and other fluids in high/low temperature extremes - at high pressure ratings.

LineBacker® Sealing/Isolating System

The LineBacker sealing gaskets utilize a rectangular sealing element, referred to as a "quad" ring, in combination with a unique groove design to effectively seal and isolate flanges of all types. With the unique "quad" ring design, elastic memory is provided for elastomers not normally associated with this characteristic. Materials such as AFLAS, TFE (Teflon) and KALREZ may therefore be used as sealing elements which dramatically increases the options available for matching gasket materials to service and environmental conditions.

PGE System

The PSI/Pikotek PGE is a low-pressure service isolation kit designed for electrical flange isolation and/or general sealing applications. This gasket is suitable for use in raised-face and flat-face flanges in ANSI class 150 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.

Type G-S-S

Rubber-steel gasket with vulcanized steel ring for safe centering and perfect sealing according to EN 1514-1 (PN6-40).

Gasket according to DIN 2690 and ANSI on request

Available for ND 15 up to 1200 (up to ND 2000 on request)

Suitable for pressure ratings PN 6 up to PN 40
These rubber steel gaskets are suitable for general uses including pipeline construction, water, gas, sewage, oil and chemicals. Also suitable for enamel coated flanges and plastic flanges.


The VCFS* utilizes Pikotek’s standard VCS design with its 20 plus year track record of success in sealing Very Critical Service. The FS* version was created by taking a standard VCS configuration and adding a secondary sealing element that is capable of maintaining a seal while subject to a 1500ºF fire. The VCFS* combines the VCS’s proven track record of electrical isolation and sealing integrity in aggressive situations with a solution that has fully passed the API 6FB, 3rd Edition fire test.

VCS / Line-Seal®

The Pikotek VCS gasket is a high reliability gasket used for both insulating and general sealing purposes in Very Critical Services. The gasket has a proven track record of integrity in aggressive sealing situations. The VCS is suitable in all services up to and including ANSI 2500# and API 15,000# classes. The VCS is designed for service where the cost of gasket failure cannot be tolerated. The VCS gasket consists of a PTFE (Teflon) spring-energized face seal, or an elastomeric o-ring, seated in an insulating laminate, which is permanently bonded to a high-strength metal gasket core.

ElectroStop® Monolithic Isolation Joints

The ElectroStop® monolithic isolation fittings serves as a positive leak proof, long lasting block against the flow of electric current in all piping systems. When the ElectroStop® isolation fitting is buried, you bury maintenance costs forever - an especially important feature for system operators and engineers.

The ElectroStop® eliminates short circuits, field assembly and is less expensive than a jointed flange with isolation gaskets.  The ElectroStop® is coated internally and externally to prevent corrosion and is 100% hydrostatically, electrically and weld tested.  All ElectroStop® monolithic isolation joints are manufactured in accordance with ISO 9001-2008.


The GPT VCXT™ flange insulating kit is comprised of an insulating gasket, insulating sleeves, insulating washers and metal backing washers. The insulating gasket is constructed from a machined metal core utilizing a serrated profile. The metal core is faced with THERMa-PUR™, a proprietary high temperature sealing material that out performs vermiculite. Correct gasket location is ensured by the use of a Garlock 5500 spacer ring, located around the periphery of the serrated metal core.