Piston Seal

MPS-45X4X2.9-B5 is a MPS Piston Seal Assembly

MFG # P045034042P2B, MPSR-45X34.0X4.2-B5, SPGM045034-042

The MPS-45X4X2.9-B5 MPS Piston Seal Assembly is a low-friction PTFE piston seal designed for hydraulic applications needing excellent wear performance and tight tolerances. Molded from filled PTFE and finished to close machining tolerances, it uses a 70A nitrile O-ring energizer to maintain sealing force across a wide operating range—because leaks are bad enough without also adding drag and heat to the mix.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: MPS-45X4X2.9-B5
• MFG Cross-Refs: P045034042P2B, MPSR-45X34.0X4.2-B5, SPGM045034-042
• Product Type: Piston seal assembly
• Nominal ID: 34.00 mm
• Nominal OD / Bore: 45.00 mm
• Nominal Height: 4.00 mm
• Groove Diameter (H): 34.00 mm
• Groove Width (D): 4.20 mm
• Material: Filled PTFE piston seal
• Energizer: 70A nitrile (NBR) O-ring
• Temperature Range: -40°F to +230°F
• Pressure Range: 0 to 5,000 PSI
• Speed Rating: 12 ft/sec
• Weight: 0.024628 lb

Ideal For

• Hydraulic cylinders needing a low-friction, wear-resistant piston seal
• Applications up to 5,000 PSI and speeds up to 12 ft/sec
• Systems operating in wide temperature swings (-40°F to 230°F)
• Anyone who wants smooth cylinder motion without the “mystery drip” bonus feature