Brand: Garlock

Garlock GYLON Style 3504 Blue PTFE Gasket Sheet

Name: Garlock GYLON Style 3504 PTFE Gasket Sheet – Datasheet & Quote
Brand: Garlock
SKU: Style 3504

Description

Blue microsphere-filled PTFE sheet for general chemical service

GYLON Style 3504 is the blue PTFE gasket sheet from Garlock’s GYLON family, made from PTFE with aluminosilicate microspheres. Garlock sells it as a tight-sealing material with improved performance over conventional PTFE, reduced product loss and emissions, reduced creep relaxation and excellent bolt-torque retention.

Its unique manufacturing process is said to minimise the cold-flow problems typical of skived and expanded PTFE sheets, and the branding and colour coding are meant to reduce misapplication. Typical applications named are piping systems, pressure vessels, pumps, scrubber systems and storage tanks, with industries ranging from chemical processing, oil and gas and power generation to food, pharmaceutical and water.

Technical specifications

Parameter	Specification
Manufacturer / style	Garlock, GYLON Style 3504
Composition	PTFE with aluminosilicate microspheres
Colour	Blue
Fluid services	Many acids, some caustics, hydrocarbons, solvents, hydrogen peroxide, refrigerants and cryogenics
Temperature, minimum / ideal operating limit / maximum	-450 °F (-268 °C) / 400 °F (204 °C) / 500 °F (260 °C)
Pressure, minimum / ideal operating limit / maximum	Full vacuum / 750 psig (52 bar) / 800 psig (55 bar)
P x T maximum	350,000 psig x °F (12,000 bar x °C) for 1/32 and 1/16 in; 250,000 (8,600) for 1/8 in
Specifications printed	ABS (American Bureau of Shipping); FDA 21 CFR 177.1550; USP; will not support flame or bacterial growth
Compressibility, ASTM F36	25 to 45 %
Recovery, ASTM F36	30 %
Creep relaxation, ASTM F38	40.0 %
Tensile strength across grain	2000 psi (13.8 N/mm2)
Specific gravity / density	1.70
Design factors, ASTM F586 (m; y)	1/16 in and under: m 3.0, y 1650 psi (11.4 N/mm2); 1/8 in: m 2.5, y 3000 psi (20.7 N/mm2)
Gasket constants, ROTT	1/16 in: Gb 183, a 0.357, Gs 4.01×10-3; 1/8 in: Gb 1008, a 0.221, Gs 2.23
Sealing characteristics	ASTM F37B Fuel A at 1000 psi (7 N/mm2) gasket load and 9.8 psig (0.7 bar): 0.12 ml/hr; DIN 3535 nitrogen at 4640 psi (32 N/mm2) and 580 psig (40 bar): less than 0.015 cc/min
Catalogue example on garlock.com	0.188 in x 60 x 60 in sheet (4.8 x 1524 x 1524 mm), blue, branded

Values are the typical properties printed in the Garlock spec sheet (August 2023). Garlock marks them as a general guide.

Reading the Style 3504 data when selecting a gasket

The service window is wide: -450 °F (-268 °C) to 500 °F (260 °C), with 400 °F (204 °C) given as the ideal limit, and full vacuum to 800 psig (55 bar). Garlock lists many acids, some caustics, hydrocarbons, solvents, hydrogen peroxide, refrigerants and cryogenic duty as the fluid services, while Garlock lists strong caustics under Style 3510 instead.

Compressibility of 25 to 45 % lets the sheet follow flange irregularities, and the design factors depend on thickness: m 3.0 and y 1650 psi up to 1/16 in, m 2.5 and y 3000 psi for 1/8 in. Garlock’s own interchange list names Chesterton ESC-B and Flexitallic SIGMA 500 for this style. The datasheet lists FDA, USP VI, REACH and RoHS compliance statements for the product family.

Related Garlock gasket sheets

GYLON styles differ by filler, and the filler decides which media they suit best.

Garlock style	Composition	Colour	Media and use printed by Garlock
GYLON Style 3510	PTFE with barium sulfate	Off-white	Strong caustics, moderate acids, chlorine, gases, steam, hydrocarbons, cryogenics
GYLON Style 3500	PTFE with silica	Fawn	Strong acids (except hydrofluoric), solvents, hydrocarbons, water, steam, chlorine, cryogenics
GYLON EPIX Style 3504 EPX	PTFE with aluminosilicate microspheres, hex profile	Blue	One thickness does the job of two; same material as traditional GYLON 3504
GYLON Style 3545	Microcellular PTFE with rigid PTFE core	White	Low bolt load and glass-lined equipment, strong acids and caustics, hydrocarbons

Documents, ordering details and quotation

State whether the joint is raised face or flat face, because the minimum stress differs. For a quotation please give the medium and concentration, design and test pressure, temperature, the flange standard and facing, bolting, the thickness and whether you need whole sheet or gaskets cut to size. Garlock describes its datasheet as a general guide that should not be the sole means of selecting or rejecting a material, so confirm the grade with Garlock Applications Engineering for any critical duty. More products are listed under gaskets, seals and pipe fittings.

Datasheets & Documents

Datasheet GARLOCK GYLON Style 3504 spec sheet, 8/15/2023 Download

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About brand

Garlock is a sealing products manufacturer based in Palmyra, New York, and part of Enpro. Seven Star LLC supplies Garlock gasket sheets to plant, maintenance and fabrication teams in Oman and the GCC on inquiry.

GYLON and BLUE-GARD gasket sheets

The sheets listed here come from two families. GYLON is the PTFE based range for chemical, food and pharmaceutical duties, and BLUE-GARD is the aramid fibre range for water, oils, steam and gases. Each official spec sheet shows the style, service limits, typical properties and the approvals that are printed on it.

Seven Star LLC links the manufacturer document on every product page, so buyers can verify the figures and approvals themselves before they send an inquiry.

Choosing the right style

The correct style depends on the medium and concentration, temperature, pressure, flange facing and bolt load. Send these details with your request for quotation and we compare them with the published Garlock data before we quote, referring critical duties back to the manufacturer. Sheets can be quoted as whole sheets or as gaskets cut to size.