Insulation Gasket Kit

QS Gasket: Insulation Gasket Kit China Manufacturer

Insulation Gasket Kit built around Gylon 3500 silica-filled PTFE with moulded sleeves and washers for flanged joints.

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One-Minute Overview

Flange isolation assembly built around a Gylon 3500 silica-filled PTFE retainer for flanged joints.
Supplied complete with moulded sleeves and washers for electrical discontinuity at the joint.
Rated for 6 Inch and 150LB / 300LB service, sealing and isolating in one kit.
Exact bolt pattern, thickness and dimensions are confirmed per inquiry.

A flange isolation assembly does two jobs at once: it seals the joint and it breaks the metallic path that lets stray currents and galvanic corrosion move between connected pipe sections. This one is built around Gylon 3500 silica-filled PTFE with moulded sleeves and washers for flanged joints at 150LB / 300LB. Qishine supplies it where a dependable dielectric break matters as much as a leak-tight seal.

Name: Insulation Gasket Kit
Type: F
Gasket material: Gylon 3500, silica-filled PTFE
Size: 6 Inch
Pressure: 150LB / 300LB
Service: Strong acids, solvents, hydrocarbons and aggressive media
Note: Full dimensions and bolt pattern are confirmed per inquiry.

Start with the flanged joints geometry and the 150LB / 300LB class, because they fix the gasket footprint and the bolt circle. Then match the retainer to the medium: Gylon 3500 silica-filled PTFE for the listed service, with moulded sleeves and washers chosen so the insulating stack keeps its dielectric strength under bolt load. Confirm the gasket bore clears the pipe ID and that the 6 Inch dimensions are confirmed per inquiry against the flange drawing before anything is cut.

On installation, clean both flange faces, set the retainer concentric with the bore and bring the bolts up in a star pattern so compression stays even. Insulating sleeves must run the full grip length and seat square under the washers; a short or cocked sleeve can crush and short the bolt to the flange. Recheck torque after the first heat-up, because gasket creep and thermal growth both relax the joint. Used this way, the kit supports cathodic protection by keeping protection current on the intended side of the joint.

FAQ

Q1. How does this kit break the electrical path across the flange?

The Gylon 3500 silica-filled PTFE retainer seals the joint while moulded sleeves and washers keep every bolt from touching the flange metal. With the current path interrupted, cathodic protection current stays on the protected side and galvanic corrosion between dissimilar metals is held in check.

Q2. What should I check on the flange face before fitting the gasket?

Inspect the flanged joints surfaces for pitting, warping and old gasket debris, then verify the gasket bore clears the pipe. A clean, flat face lets the retainer compress evenly; a scored or dirty face concentrates bolt load and invites a leak under 150LB / 300LB service.

Q3. How tight should the bolts be, and do the sleeves change the torque?

Tighten in a cross pattern to the value set by the flange and bolt grade, in several passes, so the retainer compresses evenly. Insulating sleeves and washers must seat square: a cocked sleeve can crack under load, so confirm the full stack-up and recheck torque after the first thermal cycle.

Q4. How long will production take?

Standard sizes are typically ready within 30 days, and in-stock items ship immediately. Larger or custom orders get a confirmed date per order, because the schedule depends on quantity, material, the bolt pattern you specify, and how busy production is at the moment you order.

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