LineBacker® seals utilize a patented rectangular sealing element, in combination with a unique groove design to effectively seal and insulate flanges of all types. With the unique “quad” ring design, elastic  memory is given to the elastomer. Materials such as Kel-F, polyamide, PTFE (Teflon) and Vinyl are also available as sealing elements which considerably increases the available options for adapting sealing materials to applications and environmental conditions. This greater variety of materials also provides excellent temperature and chemical range compatibility. LineBacker® “m” and “y” factors are close to zero, thus enabling the creation of a positive sealing without high bolt loads, which are present with flat gaskets.

LineBacker® isolation gaskets can be manufactured in any common diameter. Various LineBacker® seal retainers and sealing rings can be used for special applications. PSI’s unique sealing elements provide elastic memory to a wide assortment of materials. LineBacker® gaskets can be ordered individually.

Properties

The isolation is a hight quality seal. It functions as an electrical separation point and prevents contact corrosion.

• The isolation is a hight quality seal. It functions as an electrical separation point and prevents contact corrosion.
• Prevention of flange leaks
• Guards against blowouts
• Usable with any type of flange
• The sealing material is matched to operation conditions
• Lowest possible bolt force and compressive load
• Increases gasket life 
The GLV-UniSeal® seals are available as an alternative for DVGW (gas) and KTW (potable water) approval.
  *PGE upon request !
 
The PSI Pikotek VCS/LineSealTM lange isolation is a system for “Very Critical Service” designed for electrical flange isolation and general sealing applications. This seal is suitable for use with raised-face, flat-face and RTJ flanges in all pressure classes including API 10,000 psi service. In addition to its superior sealing characteristics and excellent dielectric properties, the VCS/LineSealTM is ideal for isolating flanges made from dissimilar metals, thus reducing galvanic corrosion and localized flange face corrosion.

VCS/LineSealTM Isolation System Advantages and Benefits

• Extremely reliable sealing and isolating solution for all critical services
• Seals and isolates  all pressure classes up through ANSI 2500 class and API 10,000 psi 
• Withstands severe service conditions including large bending moments, fluctuating vibrations, temperatures and pressures 
• Designed to withstand corrosive environments, including high concentrations of CO2, H2S, produced water, etc.
• Outstanding isolation properties for cathodic protection
• Pressure-activated seals provide highly reliable sealing and eliminate costly leakage
• The gasket size is adjusted to the respective flange diameter in order to protect the flange faces from media-incluced corrosion and flow-induced erosion.
• Avoids flow turbulences at flanged connections
• Mitigates galvanic corrosion at dissimilar metal flanges
•Resilient lamination material does not fail due to overpressure (e.g due to overtightened bolts) (e.g. over tightening bolts)
• Available to match any flange specification (ANSI, API, MSSP, BS, DIN, AS, others)
• Can mate mismatched RTJ with raised-face flanges
• Easy installation, make up and removal:
• Flanges do not have to be lubricated as with ring gaskets. The VCS/LineSealTM easily slips into place
• Sealing system results in low required bolt loads. Less make up force is required resulting in less flange and bolt stress
• VCS/LineSealTM  aligns and centers itself, is quickly installed and no special tools are required 
- Its maintenance-free and  corrosion protective  design helps the gasket withstand deformation under high loads 
 
The World's only Firesafe flange isolation system 
VCFS* (VCS FireSafe*)

• Based upon proven PSI Pikotek VCS/LineSealTM platform
• Provides complete electrical flange Isolation
• Tandem seal Technology
• Primary sealing system has more than twenty years successful track record
• Secondary sealing system is  fire safe
• Passed API 6FB, part 3 Fire Test
• Use in conjunction with cathodic protection Systems
• Reduces potential flange Rotation
• Provides sealing under  low bolt load

 

The VCFS* utilizes PSI Pikotek standard VCS design with its 20 years plus  track  track record of successfully 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 1500°F (815°C) fire. The VCFS* combines the VCS s proven track record of electrical isolation and sealing integrity in aggressive chemical environments with a solution that has fully passed the API 6FB, 3rd Edition fire test. The VCFS* is suitable in all services up to and including ANSI 2500# and is offered for ring type joint (RTJ) flanges from 6” - 24” and raised face flanges from 2” - 24”. The VCFS* is designed for service where the cost of joint failure cannot be tolerated and the operator desires both electrical isolation and added sealing integrity in the case of a fire. The VCFS* seal consists of a PTFE  spring-energized primary sealing element and an E-ring secondary seal, all seated in a highly resilient metal core, permanently bonded to an isolating lamination. Due to its unique pressure activated sealing mechanism, the gasket requires far less bolt load to seal than other gasket types. In addition, the engineered E-ring will serve as a secondary seal during normal operation and as the primary sealing element during a fire.

The API 6FB Fire Test requires that any sealing or connection holds up  for 30 minutes in fire and then another 60 minutes cooling down. After the assembly is cooled down to room temperature, the line is de-pressurized and then re-pressurized. During all stages of the test the gasket must not exceed an leakage rate prescribed by API.

GasketSeal® seals are among the most effective Flange gaskets. The seal consists  of two molded semi O-rings mounted in grooves on opposite sides of an insulating retainer. While maintaining all the advantages of a full O-ring seal, the semi O-ring seal eliminates the need for a sealing groove in the flange face. The GasketSeals´s  “m” and “y” factors are close to zero, thus enabling the creation of a positive sealing without high bolt loads, which are present with flat gaskets. GasketSeals are available in a wide variety of retainer rings and sealing element combinations for matching seals to service and environmental conditions.

You can order the  EPDM isolation in varying strengths, versions, types E or F and with an isolation set. The PSI range of EPDM gaskets offer durability and strength. For gaskets having a thickness greater than 4 mm we insert a polyester fabric inlay which adds strength to the durable EPDM gasket material. This polyester fabric inlay reduces the risk of damage to the gasket by overtightening of the flanges. For DVGW (gas) and KTW (potable water) approval, the GLV-UniSeal® are available.