ISOMAX LPS Flange Insulation Sets

The LPS gasket is an economical seal for electrical flange isolation and general applications requiring higher performance capabilities than those offered by neoprene-faced phenolic gaskets.

The gasket comprises grooves that are machined into high strength G10 laminate and in to which are inserted either spring energized PTFE or Viton o-ring seals which offer excellent sealability at low loads. The LPS gasket is highly suited for use in classes up to and including class 600 lb gasket.

The LPS gasket is available in full face (Type E) and ring style (Type F) configuration.

Category:

Description

General Properties

  • Gives a high sealing reliability in low pressure system.
  • Excellent electrical insulation when used on cathodic protection systems.
  • Is suitable for most hydrocarbons services subject to seal ring material selection.
  • Reduces galvanic corrosion in dissimilar metal flanges.
  • Design eliminates media-induced corrosion and flow-induced erosion from flange faces.
  • Design requires reduced flange/bolt assembly stress.
  • Easy installation and removal.
  • Suitable for all ANSI rated flanges up to class 600 lb.

Materials

Gasket Insulating Material & Washers: G-10 Glass Reinforced Epoxy (GRE) as standard (G-11 high-temperature grade also available).

Spring energized PTFE or O-Ring pressure activated seal: PTFE (spring energized) as standard (Viton and Neoprene also available).

Insulation sleeves: GRE (standard) or Nomex for high temperature service.

Ring Face Full Face

Ring Face

Full Face

LPS Flange Gasket Advantages & Benefits

  • Low pressure sealing (ANSI class 150, 300 and 600) service.
  • Seals are pressure activated.
  • High strength laminate material reduces failure due to excess compression.
  • Excellent electrical insulation when used on cathodic protection systems.
  • Design eliminates media-induced corrosion and flow-induced erosion from flange faces
  • Reduces galvanic corrosion in dissimilar metal flanges.
  • Also available with a variety of elastomeric seals.
  • Easy installation, assembly and removal as design requires reduced flange/bolt assembly stress.
  • Flanges do not have to be spread as would be the case with RTJ gaskets. The LPS easily slips in place.
  • Gasket is self-aligning and centering, quick to install, no special tools are required.
  • Maintenance-free, corrosion resistant design.

Insulation Kit Contents:

Insulating facing: G-10 glass reinforced epoxy resin

Seal: Spring energised PTFE ( Viton or Neoprene rubber also available)

Thickness: 3.2mm.

Insulating Washers: G-10 glass reinforced epoxy resin (other materials are available)
3.2mm thickness 2 washers per bolt

Steel Washers: Zinc-plated steel, 3.2mm thickness (stainless steel washers also available) 2 washers per bolt

Insulating Sleeves: G-10 glass reinforced epoxy resin. (Mylar and Nomex also available) 1 insulating sleeve per bolt

Core Materials:

Material type: G-10 Glass-reinforced epoxy resin G11 High temperature resin
Compressive strength: 50,000psi-minimum 50,000psi-minimum
Dielectric strength: 24.1-31.5kV/mm 24.0kV/mm
Maximum Temp: 150°C 200°C
Water absorption: 0.1%-maximum 0.1%-maximum
Flexural strength: 65,000psi 57,700psi
Tensile strength: 50,000psi 41,000psi
Temperature range: -130°C to 150°C

(limited by gasket material)

-46°C to 200°C

(limited by gasket material)

Seal: Spring-energised PTFE(Viton or Nitrile rubber also available)