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
| Color | Temperature | Application | Information | |
|---|---|---|---|---|
| NDS-100 PTFE-virgin |
White | -190 to +230 °C | Chemical Industry, Food Industry | High chemical resistance Datasheet |
| NDS-123 PTFE +15% glass, +5% molybdenum disulfide |
Grey | -190 to +290 °C | Medium-duty |
High chemical resistance, High creep resistance, Electrical properties like virgin PTFE
|
| NDS-225 PTFE +25% carbon |
Black | -190 to +315 °C | Pneumatics Rotary sealing | High wear and creep resistance Datasheet |
| NDS-235 PTFE +10% carbon fibre |
Black | -260 to +310 °C | Water hydraulics, Seawater, Short strokes with high frequency | Very good wear properties Datasheet |
| NDS-415 PTFE +15% graphite |
Antrachite | -190 to +230 °C | Low mechanical stress, Soft sealing Surfaces | Chemical resistance |
| NDS-555 PTFE + mineral fibers |
Antrachite | -200 to +260 °C | Medium and heavy mechanical stress, Hydraulic applications | Chemical, wear and creep resistance Datasheet |
| NDS-640 PTFE +40% bronze |
Bronze | -156 to +260 °C | Medium and heavy mechanical stress, Hydraulic applications |
Outstanding wear and creep resistance
|
| NDS-660 PTFE +60% bronze |
Bronze | -156 to +260 °C | Heavy mechanical stress, Hydraulic applications | Outstanding wear and creep resistance |
| NDS-750 PTFE + polyimide |
Tan | -260 to +310 °C | High speed rotating applications | Use against soft metals |
Related PTFE Seals
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.
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.
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.
CONTACT FORM
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NewDealSeals B.V.
+31 (0) 226 362 233
Boezemschop 8, Breekland, 1724 BJ Oudkarspel, The Netherlands