Professional O-Ring and Oil Seal Manufacturer, Sealing Solution Supplier Since 2008.
GA Hydraulic Rod Wiper Seal AM Series Metal‑Cased Dust Seal PU NBR FKM Available
ategory: Hydraulic Seal / Wiper Seal
Temperature: -50℃ ~ +200℃
Pressure: 0 Bar (Dust-proof only, non-pressure bearing)
Material: NBR, FKM, PU with carbon steel metal frame
Color: Black / Brown
Product description:
The AM wiper seal, is also called GA, serves to prevent ingress of dust, dirt, sand and swarf. This is achieved by its special design which largely prevents scoring, protects the guiding parts and extends the service life of the seals. An oversized diameter ensures interference fit in the groove recess, thus preventing ingress of foreign particles at the wiper’s outer diameter. The wiper ring of the AM product series can simply be press-fit into the cylinder liner and requires no special retention rings.
5.0
design customization
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Please fill out the form below to request a quote or to request more information about us. please be as detailed as possible in your message, and we will get back to you as soon as possible with a response. we're ready to start working on your new project, contact us now to get started.
1. Product Overview
AM‑series wiper is single‑acting press‑fit dust wiper with integrated metal reinforcement frame. It is installed on piston‑rod side of hydraulic / pneumatic cylinders. Its main function is scraping dust, sand, mud, metal swarf and other contaminants off piston‑rod surface during rod retraction, preventing foreign particles entering inside cylinder, protecting rod surface against scoring and abrasion, and extending service life of inner rod seals & piston seals.
Oversized outer‑diameter provides reliable interference fit inside housing bore, blocking contaminants from penetrating through OD clearance. Non‑pressure‑bearing component (0 bar only), cannot work as pressure seal.
2. Main Advantages
- Metal‑cased structure, anti‑deformation, stable positioning, no circlip required for installation
- Simple press‑fit installation, suitable for open‑style housing groove
- Excellent wiping performance for heavy‑pollution working conditions
- Wide material options for diverse temperature & media requirements
- Direct drop‑in replacement for original Parker Prädifa AM series, fits standard ISO 6195‑B groove without modification
- Cost‑effective alternative for OEM, MRO and hydraulic repair market
3. Technical Parameters
- Standard: ISO 6195 Type‑B (DH8 housing groove)
- Application: Hydraulic cylinder rod, pneumatic cylinder, mobile hydraulics, general industrial equipment
- Structure: Single‑lip, metal‑cased, press‑fit interference mounting
- Max surface speed: 2 m/s
- Working pressure: 0 bar (dust‑proof only, not pressure resistant)
- Reinforcement frame: Low‑carbon steel (anti‑rust treatment available upon request)
- Standard material: NBR 90 Shore A (Material code Z5053)
- Optional materials: ‑ FKM (FPM):‑25 ℃ ~ +200 ℃, good resistance to high‑temperature oil & chemicals ‑ EPDM:‑50 ℃ ~ +140 ℃, suitable for hot‑water, steam and polar‑media environment
- Compatible media: Mineral‑based hydraulic oils, lubrication oils, grease, some flame‑retardant hydraulic fluids
- Surface finish requirement: Rod Ra 0.1‑0.4 μm; Housing bore Ra 0.8‑1.6 μm
4. Part‑Number Coding Rule
Example：AMA025Z5053
‑
AMA = Series code
‑ 025 = Piston‑rod diameter: 25 mm
‑ Z5053 = NBR‑90 material codeCustom sizes & custom material codes are available on request.
5. Installation Guidelines
- Housing groove must strictly follow ISO 6195‑B DH8 tolerance requirement. Remove burrs, sharp edges before assembly; housing chamfer 20‑30° is required for smooth pressing‑in.
- Apply compatible lubricant on wiper OD and lip before installation.
- Force must apply evenly on metal shell only. Never strike or press wiper lip directly. Avoid frame distortion.
- Wiper lip faces outward (towards atmosphere side).
- Keep assembly environment clean, avoid metal chips scratching sealing lip.
6. Typical Application Scenarios
Mobile machinery, construction machinery, agricultural machinery, forklifts, hydraulic presses, metallurgical equipment, general‑industry hydraulic cylinders, cylinder repair & maintenance service.
7. Important Notice
- This is dust wiper only, cannot bear system working pressure. Must match corresponding rod seal set inside cylinder.
- Please do NOT confuse with Hydrapac‑AM anti‑extrusion backup ring; they are totally different products.
- Temperature and speed figures are maximum values; cannot reach all limits simultaneously. Real performance depends on media, surface quality and working cycles.
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