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Style 1800 Glass-Filled PTFE Piston Seal, 5.00 Inch Bore Diameter, 4.44 Inch Groove Diameter, Inch Groove Width

Description & Features

Manufactured by Hercules Sealing Products, this piston seal features a 15% glass-filled PTFE sealing element paired with a rubber energizer, offering reliable performance across a pressure range of 0 to 5,000 PSI and a temperature range of -40°F to 220°F. The Style 1800 Glass-Filled PTFE Piston Seal, 5.00 Inch Bore Diameter, 4.44 Inch Groove Diameter is engineered for use in hydraulic cylinders where dimensional consistency and material integrity are critical. With a 5.00-inch bore, a groove diameter of 4.44 inches, and a seal cross section of 0.087 inches, this seal is precision-dimensioned to close tolerances, bore tolerance of ±0.002 inches and a cross section tolerance of +0.006/-0 inches. The glass-filled PTFE construction provides low friction characteristics and resistance to wear, making it well-suited for demanding industrial hydraulic applications. Seal height measures 0.269 inches with a tolerance of +0.005/-0 inches, and the piston diameter is 4.999 inches with a tolerance of +0/-0.006 inches.

SKU: PS1800-80

Supplier Part Number (MPN): PS1800-80

Alternate Part Numbers: C1DH84, MI-01037157, MINO-00407X30136

Specifications

Brand HERCULES® SEALING PRODUCTS	Additional Information 0 to 5000 psi Pressure Rating	Dimensions 0.274 in H	Material Glass Filled PTFE/NBR	Series PS1800 Series

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Model Number	Bore	Seal Height B	Seal Cross Section C	Groove Dia. E	Piston Dia. F	Bore Tolerance (in)	Piston Dia. Tolerance (in)	Cross Section Tolerance (in)	Seal Height Tolerance (in)	Groove Width Tolerance (in)
PS1800-20 Style 1800 PTFE Piston Seal	1.25	0.116	0.067	0.94	1.249	±0.002	+0/-0.005	+0.006 / -0	+0.005 / -0	±0.002
PS1800-24 Style 1800 PTFE Piston Seal	1.5	0.116	0.067	1.19	1.499	±0.002	+0/-0.005	+0.006 / -0	+0.005 / -0	±0.002
PS1800-32 Style 1800 PTFE Piston Seal	2	0.116	0.067	1.69	1.999	±0.002	+0/-0.005	+0.006 / -0	+0.005 / -0	±0.002
PS1800-36 Style 1800 PTFE Piston Seal	2.25	0.116	0.067	1.94	2.249	±0.002	+0/-0.005	+0.006 / -0	+0.005 / -0	±0.002
PS1800-40 Style 1800 PTFE Piston Seal	2.5	0.116	0.067	2.19	2.499	±0.002	+0/-0.005	+0.006 / -0	+0.005 / -0	±0.002
PS1800-48 Style 1800 PTFE Piston Seal	3	0.269	0.087	2.44	2.999	±0.002	+0/-0.006	+0.006 / -0	+0.005 / -0	±0.002
PS1800-56 Style 1800 PTFE Piston Seal	3.5	0.269	0.087	2.94	3.499	±0.002	+0/-0.006	+0.006 / -0	+0.005 / -0	±0.002
PS1800-64 Style 1800 PTFE Piston Seal	4	0.269	0.087	3.44	3.999	±0.002	+0/-0.006	+0.006 / -0	+0.005 / -0	±0.002
PS1800-68 Style 1800 PTFE Piston Seal	4.25	0.269	0.087	3.69	4.249	±0.002	+0/-0.006	+0.006 / -0	+0.005 / -0	±0.002
PS1800-72 Style 1800 PTFE Piston Seal	4.5	0.269	0.087	3.94	4.499	±0.002	+0/-0.006	+0.006 / -0	+0.005 / -0	±0.002
PS1800-88 Style 1800 PTFE Piston Seal	5.5	0.362	0.142	4.738	5.499	±0.002	+0/-0.007	±0.005	+0.005 / -0	±0.002
PS1800-96 Style 1800 PTFE Piston Seal	6	0.362	0.142	5.238	5.999	±0.002	+0/-0.007	±0.005	+0.005 / -0	±0.002

Product Questions & Answers (3)

Question by: Neil F on May 6, 2025, 5:06 PM

Got a cylinder with a 5-inch bore that needs a new piston seal, this the right fit for that?

Answer by: Customer Support on May 7, 2025, 5:45 PM

For a 5.00-inch bore, yes, that lines up correctly. The piston diameter this seal is built around is 4.999 inches, and the groove diameter is 4.44 inches with a groove width tolerance of plus or minus 0.002 inches. Just make sure your groove dimensions match before installing. One thing worth knowing: the piston diameter spec here assumes no wear rings are present, so if your piston runs wear rings, those dimensions may not apply directly.

Question by: Howard H on Oct 6, 2025, 2:09 PM

got a 5 inch bore cylinder, how tight do i need to be on the bore size for this style 1800 seal?

Answer by: Customer Support on Oct 8, 2025, 11:23 AM

For this seal, the bore is called out at 5.00 inches with a bore tolerance of ±0.002 inches. The seal itself is built to close dimensions too, with a cross section tolerance of +0.006/-0 and a seal height tolerance of +0.005/-0, so staying inside that bore tolerance matters for consistent sealing.

Question by: Connie S on Jun 5, 2025, 12:53 PM

So, this seal fits into a 5-inch bore, right? Just want to be double-dog sure before I order.

Answer by: Customer Support on Jun 7, 2025, 6:37 AM

Engineered for hydraulic cylinders, this seal is designed to fit a 5.00-inch bore with a groove diameter of 4.44 inches. The bore tolerance is plus or minus 0.002 inches.

Style 1800 Glass-Filled PTFE Piston Seal, 5.00 Inch Bore Diameter, 4.44 Inch Groove Diameter, Inch Groove Width

Description & Features

Specifications

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Product Questions & Answers (3)