Skip to the beginning of the images gallery

Style 1800 Glass-Filled PTFE Piston Seal, 2.50 Inch Bore Diameter, 2.19 Inch Groove Diameter, Inch Groove Width

Description & Features

Designed for demanding industrial environments, the Style 1800 Glass-Filled PTFE Piston Seal ensures reliable performance in hydraulic applications. Constructed from 15% glass-filled PTFE with a rubber energizer, this seal provides excellent durability and resistance to wear. It is suitable for systems operating within a pressure range of 0 to 5,000 PSI and a temperature range of -40°F to 220°F, making it versatile for various applications.

The seal features a bore diameter of 2.50 inches, a groove diameter of 2.19 inches, and a seal cross-section of 0.067 inches, ensuring a precise fit. Manufactured by Hercules Sealing Products, this piston seal is designed for pistons without wear rings, providing a seamless integration. With tolerances carefully controlled, including a bore tolerance of ±0.002 inches and a piston diameter tolerance of +0/-0.005 inches, this product guarantees optimal sealing performance.

SKU: PS1800-40

Supplier Part Number (MPN): PS1800-40

Alternate Part Numbers: C1DH77, MI-01038309, MINO-00407X30236

Specifications

Bore 2.50	Bore Tolerance (in) ±0.002	Cross Section Tolerance (in) +0.006 / -0	Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	Groove Dia. E 2.19	Groove Width Tolerance (in) ±0.002	Piston Dia. F 2.50	Piston Dia. Tolerance (in) +0/-0.005	Seal Cross Section C 0.07	Seal Height B 0.12	Seal Height Tolerance (in) +0.005 / -0	Supplier Part Number PS1800-40	Alternate Part Numbers Alternate Part Number C1DH77, Alternate Part Number MI-01038309, Alternate Part Number MINO-00407X30236	Product Weight 0.01 lbs

Similar Products

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
PS1800-80 Style 1800 PTFE Piston Seal	5	0.269	0.087	4.44	4.999	±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 (2)

Question by: Bonnie H on Mar 23, 2026, 7:47 AM

got a piston that measures 2.499, is this seal the right fit or am i gonna be fighting it

Answer by: Customer Support on Mar 25, 2026, 7:56 AM

Fit comes down to the bore and piston dimensions this seal was built around. It is sized for a 2.50 inch bore with a piston diameter F of 2.499 inches, and it calls out a bore tolerance of plus or minus 0.002 inches and a piston diameter tolerance of +0 / -0.005 inches. If your piston is 2.499 and your bore is in that 2.50 range, it matches the intended sizing.

Question by: Freddie K on Jun 16, 2025, 3:39 PM

Got a cylinder with a 2.50 inch bore, this the right seal for that, and what should the piston diameter be machined to?

Answer by: Customer Support on Jun 18, 2025, 8:55 AM

For a 2.50 inch bore, this seal fits right. The piston diameter dimension listed is 2.499 inches, with a tolerance of +0 and -0.005 inches. Keep in mind those dimensions are given for pistons without wear rings, so if your setup uses wear rings you'd want to account for that before assuming the fit is correct.