Garlock Graph-Lock 3128 Hochdruk Ring Gasket

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Garlock Graph-Lock 3128 Hochdruk Ring Gasket

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GRAPH-LOCK® 3128 HOCHDRUCK® is a multi-layer, high strength sheet material composed of .020” thick layers of high purity flexible graphite (carbon >99.85%) and .002” thick layers of 316 stainless steel foil insert. It provides high compressive strength, blow-out resistance, excellent handling properties, and improved tightness. Download our ring gasket guide here.

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PERFORMANCE & SPECIFICATIONS

Performance

Min Temperature (F) -400°
Max Temperature (F) 850°
Max Pressure (PSI) 2000

Features and Benefits

Pure exfoliated graphite flake material excels in extreme conditions, withstanding heat, pressure, and aggressive chemicals
Proven fire-safe
Seals easily under moderate bolt load, offers superior torque retention
Retains dimensional stability in high temperatures; seals tightly even during pressure fluctuations

Material Datasheets

Graph-Lock 3128 Hochdruk

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PART NUMBER	Nominal Pipe Size	Pressure Rating (lbs)	Flange Standard (ASME)	Thickness (In.)	Inner Diameter (In.)	Outer Diameter (In.)	Ships Within	PRICE	ADD TO CART
1/2" 150# 1/16" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 1/2 Pressure Rating (lbs) 150 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/16 Inner Diameter (In.) 0.840 Outer Diameter (In.) 1.880 Ships Within 1-2 Days See more GK-RS-NCJ-F8Q9-RE20-NYGF	1/2	150	ASME B16.5	1/16	0.840	1.880	1-2 Days	$4.43 x 3 $3.94 x 10 $2.21 x 30	Starting at: $2.21	PRICE QTY $11.58
1/2" 150# 1/8" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 1/2 Pressure Rating (lbs) 150 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/8 Inner Diameter (In.) 0.840 Outer Diameter (In.) 1.880 Ships Within 1-2 Days See more GK-RS-NCJ-F8Q9-RE20-15Y3	1/2	150	ASME B16.5	1/8	0.840	1.880	1-2 Days	$5.95 x 3 $5.29 x 7 $3.76 x 20	Starting at: $3.76	PRICE QTY $15.23
1/2" 300# 1/16" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 1/2 Pressure Rating (lbs) 300 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/16 Inner Diameter (In.) 0.840 Outer Diameter (In.) 2.120 Ships Within 1-2 Days See more GK-RS-NCJ-F8Q9-G35E-NYGF	1/2	300	ASME B16.5	1/16	0.840	2.120	1-2 Days	$4.89 x 3 $4.34 x 10 $2.91 x 20	Starting at: $2.91	PRICE QTY $12.69
1/2" 300# 1/8" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 1/2 Pressure Rating (lbs) 300 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/8 Inner Diameter (In.) 0.840 Outer Diameter (In.) 2.120 Ships Within 1-2 Days See more GK-RS-NCJ-F8Q9-G35E-15Y3	1/2	300	ASME B16.5	1/8	0.840	2.120	1-2 Days	$6.80 x 2 $6.04 x 7 $4.77 x 15	Starting at: $4.77	PRICE QTY $13.60
3/4" 150# 1/16" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 3/4 Pressure Rating (lbs) 150 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/16 Inner Diameter (In.) 1.060 Outer Diameter (In.) 2.250 Ships Within 1-2 Days See more GK-RS-NCJ-G56P-9CD0-NYGF	3/4	150	ASME B16.5	1/16	1.060	2.250	1-2 Days	$5.17 x 3 $4.60 x 10 $3.14 x 20	Starting at: $3.14	PRICE QTY $13.38
3/4" 150# 1/8" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 3/4 Pressure Rating (lbs) 150 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/8 Inner Diameter (In.) 1.060 Outer Diameter (In.) 2.250 Ships Within 1-2 Days See more GK-RS-NCJ-G56P-9CD0-15Y3	3/4	150	ASME B16.5	1/8	1.060	2.250	1-2 Days	$7.31 x 2 $6.50 x 7 $5.18 x 15	Starting at: $5.18	PRICE QTY $14.62
3/4" 300# 1/16" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 3/4 Pressure Rating (lbs) 300 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/16 Inner Diameter (In.) 1.060 Outer Diameter (In.) 2.620 Ships Within 1-2 Days See more GK-RS-NCJ-G56P-3983-NYGF	3/4	300	ASME B16.5	1/16	1.060	2.620	1-2 Days	$6.02 x 3 $5.35 x 7 $3.82 x 20	Starting at: $3.82	PRICE QTY $15.42
3/4" 300# 1/8" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 3/4 Pressure Rating (lbs) 300 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/8 Inner Diameter (In.) 1.060 Outer Diameter (In.) 2.620 Ships Within 1-2 Days See more GK-RS-NCJ-G56P-3983-15Y3	3/4	300	ASME B16.5	1/8	1.060	2.620	1-2 Days	$14.71 x 2 $10.12 x 5 $7.10 x 10	Starting at: $7.10	PRICE QTY $29.43
1" 150# 1/16" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 1 Pressure Rating (lbs) 150 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/16 Inner Diameter (In.) 1.310 Outer Diameter (In.) 2.620 Ships Within 1-2 Days See more GK-RS-NCJ-E4XU-VETT-NYGF	1	150	ASME B16.5	1/16	1.310	2.620	1-2 Days	$6.04 x 3 $5.37 x 7 $3.83 x 20	Starting at: $3.83	PRICE QTY $15.46
1" 150# 1/8" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 1 Pressure Rating (lbs) 150 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/8 Inner Diameter (In.) 1.310 Outer Diameter (In.) 2.620 Ships Within 1-2 Days See more GK-RS-NCJ-E4XU-VETT-15Y3	1	150	ASME B16.5	1/8	1.310	2.620	1-2 Days	$14.73 x 2 $10.13 x 5 $7.12 x 10	Starting at: $7.12	PRICE QTY $29.46
1" 300# 1/16" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 1 Pressure Rating (lbs) 300 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/16 Inner Diameter (In.) 1.310 Outer Diameter (In.) 2.880 Ships Within 1-2 Days See more GK-RS-NCJ-E4XU-R7WZ-NYGF	1	300	ASME B16.5	1/16	1.310	2.880	1-2 Days	$6.70 x 3 $5.96 x 7 $4.70 x 15	Starting at: $4.70	PRICE QTY $17.07
1" 300# 1/8" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 1 Pressure Rating (lbs) 300 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/8 Inner Diameter (In.) 1.310 Outer Diameter (In.) 2.880 Ships Within 1-2 Days See more GK-RS-NCJ-E4XU-R7WZ-15Y3	1	300	ASME B16.5	1/8	1.310	2.880	1-2 Days	$15.96 x 2 $12.34 x 4 $8.10 x 10	Starting at: $8.10	PRICE QTY $31.93
1.25" 150# 1/16" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 1-1/4 Pressure Rating (lbs) 150 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/16 Inner Diameter (In.) 1.660 Outer Diameter (In.) 3.000 Ships Within 1-2 Days See more GK-RS-NCJ-8WTN-QTZ0-NYGF	1-1/4	150	ASME B16.5	1/16	1.660	3.000	1-2 Days	$8.13 x 2 $7.22 x 5 $4.98 x 15	Starting at: $4.98	PRICE QTY $16.25
1.25" 150# 1/8" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 1-1/4 Pressure Rating (lbs) 150 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/8 Inner Diameter (In.) 1.660 Outer Diameter (In.) 3.000 Ships Within 1-2 Days See more GK-RS-NCJ-8WTN-QTZ0-15Y3	1-1/4	150	ASME B16.5	1/8	1.660	3.000	1-2 Days	$11.83 x 2 $10.52 x 4 $8.61 x 10	Starting at: $8.61	PRICE QTY $23.67
1.25" 300# 1/16" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 1-1/4 Pressure Rating (lbs) 300 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/16 Inner Diameter (In.) 1.660 Outer Diameter (In.) 3.250 Ships Within 1-2 Days See more GK-RS-NCJ-8WTN-63DR-NYGF	1-1/4	300	ASME B16.5	1/16	1.660	3.250	1-2 Days	$8.85 x 2 $7.87 x 5 $5.56 x 15	Starting at: $5.56	PRICE QTY $17.70
1.25" 300# 1/8" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 1-1/4 Pressure Rating (lbs) 300 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/8 Inner Diameter (In.) 1.660 Outer Diameter (In.) 3.250 Ships Within 1-2 Days See more GK-RS-NCJ-8WTN-63DR-15Y3	1-1/4	300	ASME B16.5	1/8	1.660	3.250	1-2 Days	$17.93 x 2 $15.94 x 3 $10.54 x 7	Starting at: $10.54	PRICE QTY $35.87
1.5" 150# 1/16" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 1-1/2 Pressure Rating (lbs) 150 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/16 Inner Diameter (In.) 1.910 Outer Diameter (In.) 3.380 Ships Within 1-2 Days See more GK-RS-NCJ-3TR9-G2Q9-NYGF	1-1/2	150	ASME B16.5	1/16	1.910	3.380	1-2 Days	$9.27 x 2 $8.24 x 5 $6.55 x 10	Starting at: $6.55	PRICE QTY $18.53
1.5" 150# 1/8" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 1-1/2 Pressure Rating (lbs) 150 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/8 Inner Diameter (In.) 1.910 Outer Diameter (In.) 3.380 Ships Within 1-2 Days See more GK-RS-NCJ-3TR9-G2Q9-15Y3	1-1/2	150	ASME B16.5	1/8	1.910	3.380	1-2 Days	$22.85 x 1 $16.61 x 3 $11.14 x 7	Starting at: $11.14	PRICE QTY $22.85
1.5" 300# 1/16" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 1-1/2 Pressure Rating (lbs) 300 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/16 Inner Diameter (In.) 1.910 Outer Diameter (In.) 3.750 Ships Within 1-2 Days See more GK-RS-NCJ-3TR9-S36D-NYGF	1-1/2	300	ASME B16.5	1/16	1.910	3.750	1-2 Days	$10.48 x 2 $9.31 x 4 $7.53 x 10	Starting at: $7.53	PRICE QTY $20.96
1.5" 300# 1/8" Thk Graph-Lock 3128 Hochdruk ASME B16.5 Ring Gasket	Nominal Pipe Size 1-1/2 Pressure Rating (lbs) 300 Flange Standard (ASME) ASME B16.5 Thickness (In.) 1/8 Inner Diameter (In.) 1.910 Outer Diameter (In.) 3.750 Ships Within 1-2 Days See more GK-RS-NCJ-3TR9-S36D-15Y3	1-1/2	300	ASME B16.5	1/8	1.910	3.750	1-2 Days	$25.10 x 1 $18.61 x 3 $14.08 x 5	Starting at: $14.08	PRICE QTY $25.10