35450-7708 by Garlock | GYLON® | Style 3545 | 0.125in Thick | 70in x 70in

BENEFITS:
Tighter seal Higher compressible PTFE outer layers seal under low bolt load - suitable for many flat face and glass-lined flanges* Compressible layers conform to surface irregularities, especially on warped, pitted or scratched flanges Rigid PTFE core reduces cold flow and creep normally associated with conventional PTFE gaskets Excellent chemical compatibility Pure PTFE withstands a wide range of chemicals Easy to cut and install Soft PTFE can be cut easily from larger sheets, reducing inventory costs and expensive downtime Rigid PTFE core facilitates installation, especially on large diameter flanges and hard-to-reach areas GYLON° Style 3540 Pure microcellular PTFE Similar to Style 3545, but without rigid core Ideal for wavy, warped, pitted or scratched flanges and for many types of flat face* flanges
MEDIA:
Strong caustics, strong acids, hydrocarbons, chlorine and cryogenics and glass-lined equipment. Conforms to FDA regulations.

NOTES:
Dramatically reduced leakage of GYLON® 3540 and 3545.
Average of three tests, using 580 psig nitrogen with 4,640 psi gasket load according to DIN 3535 requirements. All samples 1/16" (1.6 mm) thick.
* For flat face flanges, a minimum compressive stress of 1,500 psi (10.3 N/mm2) is recommended on the contacted gasket area for 150 psig (1.0 N/mm2) liquid service. Consult with the flange manufacturer to confirm that adequate compressive stress is available.

Typical Physical Properties

		3540	3545
Color		White GYLON®	White GYLON®
Composition		Microcellular PTFE	Microcellular PTFE w/ rigid core
Temperature1	Minimum Continuous Max.	-450°F (-268°C) 500°F 260°C)	-450°F (-268°C) 500°F 260°C)
Pressure1cont. max.1	psig (bar)	1,200 (83)	1,200 (83)
P x T, max.1 1/32", 1/16" (0.8mm, 1.6mm) psig x °F 1/8" (bar x °C) (3.2mm)		350,000(12,000)250,000(8,600)	350,000(12,000)250,000(8,600)
Sealability ASTM Fuel A ml/hr (ASTM F37B)3		0.25	0.15
Gas Permeabilitycc/min (DIN 3535 Part 4)4		<0.015	<0.015
Creep Relaxation (ASTM F38) %		10	15
Compressibility Range(ASTM F36) %		70-85	60-70
Recovery (ASTM F36) %		>8	>15
Tensile Strength ps(ASTM D1708) (N/mm2)		-	-
Flammability	Will not support flame
Bacterial Growth	Will not support

Order Code (Part Number)	Style	Thickness (in.)	Width (in.)	Length (in.)
35450-6604	3545	0.063"	60"	60"
35450-7704	3545	0.063"	70"	70"
35450-6608	3545	0.125"	60"	60"
35450-7708	3545	0.125"	70"	70"
35450-6612	3545	0.188"	60"	60"
35450-6616	3545	0.250"	60"	60"

NOTES:
1 Based on ANSI RF flanges at our preferred torque. When approaching maximum pressure, continuous operating temperature, minimum temperature or 50% of maximum PxT, consult Garlock Engineering.
2 For 3565, HP 3560 and HP 3561, 1/16" thickness only.
3 ASTM F37B Sealability
ASTM Fuel A (isooctane):
Gasket load = 500 psi (3.5 N/mm2), Int. pressure = 9.8 psig (0.7 bar)
Nitrogen:
Gasket load = 3,000 psi (20.7 N/mm2), Int. pressure = 30 psig (2 bar)
4 DIN 3535 Part 4 Gas Permeability, cc/min. (1/16" thick)
Nitrogen:
Gasket load = 4,640 psi (32 N/mm2), Int. pressure = 580 psig (40 bar)

This is a general guide and should not be the sole means of selecting or rejecting this material. ASTM test results in accordance with ASTM F-104; properties based on 1/32" (0.8mm) sheet thickness.

* Values do not constitute specification limitst.