When you need a piston seal that delivers consistent performance, long service life, and smooth operation, the PS1400-40 is built to make your job easier and your equipment more reliable. This seal combines a 15 percent glass filled PTFE sealing ring with a Buna-N rubber energizer for dependable sealing, low friction, and excellent strength. Designed for 2.500 inch bores and ANSI/B93.32-1973 groove standards, this double-acting piston seal helps prevent leaks, reduces downtime, and keeps hydraulic systems running with less maintenance. Customers choose this setup for its stability under pressure and clean, consistent actuation.
This assembly runs at a 70A durometer energizer with a natural PTFE color profile, giving you reliable performance from cold starts to heavy load cycles. If you want a piston seal that delivers repeatable results without constant adjusting, this one is ready to go to work.
PS1400-40 Glass Filled PTFE Piston Seal Assembly 15 Percent Glass PTFE Buna-N 70A 2.500 x 2.108 x 0.115
Operating temperature: -40° to +220°F (–40° to +104°C)
Material and Performance Details
This piston seal uses a 15 percent glass filled PTFE ring paired with a Buna-N energizer, giving it strength, stability, and positive contact with the dynamic surface.
Benefits for your equipment:
- Low friction for smooth actuation
- Strong extrusion resistance
- Excellent pressure handling up to 5,000 PSI
- Stable sealing even under heavy cycling
Excellent resistance to:
• Hydraulic oils
• Petroleum-based fluids
• Water glycol
• Air
• Wear and abrasion
Limited capability with:
• Steam
• Certain brake fluids
• Strong oxidizing chemicals
Not compatible with:
• Ketones
• Phosphate ester fluids
• Highly polar solvents
Sizes and Measurements
- Cross Section (CS): 2.92 mm (0.115 in)
- Inside Diameter (ID): 53.52 mm (2.108 in)
- Outside Diameter (OD): 63.50 mm (2.500 in)
- Part Number: PS1400-040
- Profile/Style: PS1400 Piston Seal Assembly
Applications and Use Cases
This seal is commonly used in:
- Hydraulic cylinders
- Industrial machinery
- Pneumatic and mobile equipment
- Material handling systems
- Compact actuators
- Agriculture and construction equipment
Its double-acting design offers balanced sealing in high-pressure or high-speed applications where durability and smooth motion matter to your uptime.
Key Specifications
- Material: 15 percent Glass Filled PTFE with Buna-N Energizer
- Durometer: 70A Energizer
- Color: Natural PTFE with black rubber energizer
- Temperature Range: -40° to +220°F (–40° to +104°C)
- Pressure Rating: 0 to 5,000 PSI
- Maximum Speed: 12 ft/sec
- Maximum Extrusion Gap:
• .020 in at 2400 PSI
• .018 in at 3750 PSI
• .014 in at 6000 PSI
Why Buy from The O-Ring Store LLC
We keep these piston seals in stock so you get what you need without long lead times. As a small and responsive distributor, we make getting seals easy, and we back every order with ISO9001:2015 quality processes. You get fast, accurate order fulfillment, same-day shipping on in-stock items, and a team that treats your uptime like our own. Need a different material or size? We can help source or custom-make what you need, backed by full lot traceability and real technical support from people who know seals.
Frequently Asked Questions.
What size piston does the PS1400-40 fit?
It is designed for a 2.500 inch bore with a 2.108 inch groove diameter and a 0.115 inch seal height.
What materials make up this piston seal assembly?
It uses a 15 percent glass filled PTFE sealing ring combined with a Buna-N rubber energizer for strength, low friction, and dependable sealing.
What temperature range can this seal operate in?
It performs from -40° to +220°F, which covers most standard hydraulic and mobile equipment conditions.
What pressure levels can this seal handle?
It is rated for 0 to 5,000 PSI in properly designed hydraulic systems.
How fast can the piston move with this seal installed?
It supports speeds up to 12 feet per second without excessive wear or drag.
Where is this piston seal commonly used?
It is used in hydraulic cylinders, industrial machinery, mobile equipment, agricultural machines, and material handling systems that need a compact, double acting seal.
What groove standard is this seal designed to fit?
It fits ANSI/B93.32-1973 groove dimensions, making it simple to replace or design into standard hydraulic hardware.
How should this PTFE seal be installed?
For small cross sections, work it over the piston by hand or with a rounded plastic tool. For larger cross sections, warm the ring to about 130–140°F to soften it. Always avoid overstretching and cover sharp edges or grooves with tape during assembly.
What fluids and chemicals is this seal compatible with?
It works well with hydraulic oils, petroleum-based fluids, air, and water-glycol. It has limited compatibility with some brake fluids and mild oxidizers, and it should not be used with phosphate esters or strong oxidizing chemicals.
What advantages do customers see when buying this from The O-Ring Store LLC?
You get in-stock availability, ISO9001:2015 controlled processes, same-day shipping, full lot traceability on request, and real support from a small team that focuses on making O-ring and seal sourcing easy and accurate.
