Piston Seals

Piston seals are used in cylinders to seal liquids. Piston seals are located in the cylinder head and seal against the cylinder wall, thus preventing leakage of liquids past the cylinder head.NewDealSeals supplies a wide range of piston seals as an economic alternative to e.g. AQ Seal®, Bal Seal®, Double Delta®, Flexiseal®, Glyd Ring®, MSE® Seal, Omniseal®, Rimseal®, Stepseal®, VL Seal®, Variseal® and Wynseal®.

Advantages Piston Seal

Assembly on one-piece pistons.
Minimal break-out and dynamic slide friction. Therefore no stick-slip. Steady movement is guaranteed even at low velocities.
Low wear.
High extrusion resistance.
High temperature resistance.
Compatibility with nearly all media due to the high chemical resistance of the piston sealing ring, and a wide selection of O-ring compounds.
Available in diameters up to 1500 mm.

Technical Specifications

Type of movement
Rotary, reciprocating

Surface speed
≤ 4,0 m/s

Working pressure
Standard:≤ 400 bar
In case of reduced extrusion gap (H7/f7):≤ 600 bar
Profile P3:≤ 160 bar
Profile P4:≤ 16 bar

Working temperature
Standard:-30 to +108°C
With FKM O-Ring:-25 to +204°C
Profile P4:-30 to +80°C

Standard materials O-Rings

NBR, FKM

Standard materials Piston Seals

Profile P1: NDS-150, PTFE modified, NDS-66-, PTFE + 60% bronze
Profile P2:NDS-123, PTFE 15% glass + 5% molybdenum disulfide, NDS-150, PTFE modified, NDS-660, PTFE + 60% bronze
Profile P3: NDS-150, PTFE modified
Profile P4: NDS-225, PTFE + 25% carbon

Profiles Piston Seals

PROFILE P1

For single-acting pistons in hydraulic cylinders

Profile P1 is particularly suitable for single-acting pistons in control cylinders, in servo controlled systems, machine tools and in construction machinery. Optimal sealing performance obtained if used in tandem with Guide Ring.
Good back-transport of oil film due to special shape of sealing edge.

PROFILE P2

For double-acting pistons in hydraulic cylinders

Profile P2 is suitable for double-acting pistons in control cylinders, servo-controlled systems, machine tools, quick acting and steering cylinders.
Capable of sealing dynamic pressure from both sides (bidirectional) at high pressure.

PROFILE P3

For dynamic applications

Profile P3 is appropriate for dynamic applications as an alternative to an O-ring in situations where sealing performance and friction have to be optimised.
Can be used in existing O-ring grooves.

PROFILE P4

For double-acting in pneumatic cylinders

Profile P4 is suitable for double-acting pneumatic pistons, e.g. in control cylinders, servo assisted equipment, and in quick-acting cylinders.
Can be used for pneumatic applications.

PTFE COMPOUNDS

For our PTFE compounds we would like to direct you to our materials database.

Alternatives

Back-up Rings
Back-up rings are used for static and dynamic applications in connection with O-rings, to prevent extrusion of the O-ring into the diametrical clearance.
Back-up Rings
Spring Energized Seals
The Synering® system is an advanced sealing concept designed to meet extreme demands regarding temperature, medium, etc. which cannot be covered by conventional sealing compounds.
Spring Energized Seals
Rotary Seals
Rotary seals are used in applications with oscillating or rotating movements in order to retain liquid lubricants and to prevent the penetration of dirt and water.
Rotary seals

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