Hans Hydraulic & Pneumatics Systems

The Problem: Locating Parts Locating replacement parts for equipment, maintenance, overhaul and repair can be a challenge. Seals in hydraulic and pnuematic components have the potential for hundreds, if not thousands, of different o-ring sizes. OEM part numbers are often missing, seal dimensions are unspecified or unknown, and the parts themselves are unavailable from the OEM or local supplier. The Solution: Parker O-Ring Kits In response to the aftermarket need for seals, Parker has developed three oring replacement kits. Each kit contains the most popular sizes for a wide range of sealing applications. As a result, these kits provide multiple sealing solutions for the same cost as a single OEM replacement part. The Parker Boss Seal Kit contains 20 standard tube fitting sizes, ranging from 3/32 to 2 inches, that are ideal for hydraulic fittings. For most U.S.-built equipment, Parker AS568 Kit #1 contains 30 of the most commonly-used o-ring sizes for general applications. The rest of the world relies on Parker Metric Kit #1, which contains 32 of the most common metric o-ring sizes for compatibility with equipment made overseas. Materials The standard materials supplied with AS568 Kits and Metric Kits are nitrile rubber compounds N1470-70 and N1490-90. N1470-70 is compatible with most petroleum-based oils, greases, hydraulic fluids up to 121°C (250°F), as well as water glycol hydraulic fluid up to 48°C (120°F). N1490-90 is normally supplied for hydraulic fittings but also suited for general purpose applications. For more demanding sealing conditions, Parker offers a wide variety of polymer families including EPDM, Fluorocarbon and many others

Hydraulic sealing systems for earth moving/construction machinery, agriculture machinery, agricultural/forestry machinery, material handling, industrial hydraulics, vehicle engineering and mining.

Products:
Rod & piston seals, wipers, flange seals, guide tape & rings, rotary distributor seals, diaphragms (Rubber & PUR), polyurethan O-rings, accumulator Seals, specials.

Basic Materials:
All known types of rubber, polyurethane (Ultrathan^®), PTFE (Polon^®), fabric and metal reinforced elastomers and plastics.

Parker O‑Ring Kit (Metric) – Application, Technical Details, Uses & Industries Most important takeaway: Parker Metric O‑Ring Kits are precision‑engineered sealing kits made from NBR 70 Shore elastomer, designed for static and dynamic sealing across hydraulic, pneumatic, and industrial systems. They are widely used because Parker provides international‑standard sizing, high chemical compatibility, and long service life.

🔧 1. Technical Details (Metric Parker O‑Ring Kit)

• Material: NBR (Nitrile Butadiene Rubber) – 70 Shore A hardness

• Standards Covered: Metric ID sizes (typically 3 mm to 50 mm depending on kit)

• Temperature Range: Based on Parker NBR compounds, typically –30°C to +100°C (inference from Parker elastomer guidelines)

• Pressure Capability: Suitable for low to medium pressure static sealing; dynamic sealing depends on speed & lubrication

• Chemical Compatibility: Good resistance to

  • Hydraulic oils

  • Mineral oils

  • Water‑glycol fluids

  • Air

  • Mild chemicals

• Design Quality: Parker O‑rings follow strict dimensional tolerances and elastomer quality standards, ensuring long service life and reduced leakage.

⚙️ 2. Applications (Where Metric O‑Rings Are Used)

Parker O‑Rings are used for static and dynamic sealing in:

• Hydraulic cylinders & valves

• Pneumatic cylinders

• Pumps & compressors

• Gearboxes & engines

• Manifolds, adaptors, couplings

• General industrial machinery

• Fluid power systems

• Instrumentation & control systems

🧰 3. Uses (Functional Purpose)

• Prevent leakage of oils, gases, coolants, and fluids

• Maintain pressure in hydraulic systems

• Seal joints between metal components

• Provide cushioning in dynamic assemblies

• Prevent contamination ingress

• Used during maintenance, repair, and overhaul (MRO)

🏭 4. Industries Using Parker Metric O‑Ring Kits

Parker O‑Rings are used across all major engineering sectors, including:

• Hydraulics & Pneumatics

• Automotive & Heavy Vehicles

• Industrial Machinery & Manufacturing

• Oil & Gas

• Aerospace

• Process Control & Instrumentation

• Food & Beverage Equipment (depending on compound)

• Power Generation

The Problem: Locating Parts Locating replacement parts for equipment, maintenance, overhaul and repair can be a challenge. Seals in hydraulic and pnuematic components have the potential for hundreds, if not thousands, of different o-ring sizes. OEM part numbers are often missing, seal dimensions are unspecified or unknown, and the parts themselves are unavailable from the OEM or local supplier. The Solution: Parker O-Ring Kits In response to the aftermarket need for seals, Parker has developed three oring replacement kits. Each kit contains the most popular sizes for a wide range of sealing applications. As a result, these kits provide multiple sealing solutions for the same cost as a single OEM replacement part.
The Parker Boss Seal Kit contains 20 standard tube fitting sizes, ranging from 3/32 to 2 inches, that are ideal for hydraulic fittings. For most U.S.-built equipment, Parker AS568 Kit #1 contains 30 of the most commonly-used o-ring sizes for general applications. The rest of the world relies on Parker Metric Kit #1, which contains 32 of the most common metric o-ring sizes for compatibility with equipment made overseas. Materials The standard materials supplied with AS568 Kits and Metric Kits are nitrile rubber compounds N1470-70 and N1490-90. N1470-70 is compatible with most petroleum-based oils, greases, hydraulic fluids up to 121°C (250°F), as well as water glycol hydraulic fluid up to 48°C (120°F). N1490-90 is normally supplied for hydraulic fittings but also suited for general purpose applications. For more demanding sealing conditions, Parker offers a wide variety of polymer families including EPDM, Fluorocarbon and many others

The Problem: Locating Parts Locating replacement parts for equipment, maintenance, overhaul and repair can be a challenge. Seals in hydraulic and pnuematic components have the potential for hundreds, if not thousands, of different o-ring sizes. OEM part numbers are often missing, seal dimensions are unspecified or unknown, and the parts themselves are unavailable from the OEM or local supplier. The Solution: Parker O-Ring Kits In response to the aftermarket need for seals, Parker has developed three oring replacement kits. Each kit contains the most popular sizes for a wide range of sealing applications. As a result, these kits provide multiple sealing solutions for the same cost as a single OEM replacement part. The Parker Boss Seal Kit contains 20 standard tube fitting sizes, ranging from 3/32 to 2 inches, that are ideal for hydraulic fittings. For most U.S.-built equipment, Parker AS568 Kit #1 contains 30 of the most commonly-used o-ring sizes for general applications. The rest of the world relies on Parker Metric Kit #1, which contains 32 of the most common metric o-ring sizes for compatibility with equipment made overseas. Materials The standard materials supplied with AS568 Kits and Metric Kits are nitrile rubber compounds N1470-70 and N1490-90. N1470-70 is compatible with most petroleum-based oils, greases, hydraulic fluids up to 121°C (250°F), as well as water glycol hydraulic fluid up to 48°C (120°F). N1490-90 is normally supplied for hydraulic fittings but also suited for general purpose applications. For more demanding sealing conditions, Parker offers a wide variety of polymer families including EPDM, Fluorocarbon and many others.

An o-ring is a torus, or doughnut-shaped ring, generally molded from an elastomer. O-rings are used primarily for sealing. They are also used as light-duty, mechanical drive belts. advantages of o-rings:

Features:

• They seal over a wide range of pressure, temperature and tolerance,
• Ease of service, no smearing or retightening,
• No critical torque on tightening, therefore unlikely to cuase structural damage,
• O-rings normallyng compound first, as the selected compound may have significant influence on gland design parameters. essentially, the application determines the rubber compound; the primary factor being the fluid to be sealed. 
• The elastomer however, must also resist extrusion when exposed to the maximum anticipated system pressure and be capable of maintaining good physical properties through the full temperature range expected. 
• In dynamic applications, the selected material must also have the toughness and abrasion resistance so important in reciprocating and rotary seals. 
• polymer families - select a polymer to view the available compounds offered within that family. 
• Polyacrylate (acm) ethylene acrylate (aem) butyl rubber (iir)polychloroprene rubber (cr)ethylene propylene rubber (epm, epr, epdm)fluorosilicone (fvmq)acrylontirile-butadiene (nbr)hydrogenated nitrile (hnbr, hsn)polyurethane (au, eu)silicone rubber (vmq, pvmq)fluorocarbon (fkm, fpm)tetrafluoroethylene-propylene (aflas)high performance fluoroelastomer (hifluor)perfluoroelastomer (parofluor)perfluoroelastomer (parofluor ultrable. require very little room and are light in weight,
• In many cases an o-ring can be reused, an advantage over non-elastic flat seals and crush-type gaskets,
• The duration of life in the correct application corresponds to the normal aging period of the o-ring material,
• O-ring failure is normally gradual and easily identified,
• Where differing amounts of compression effect the seal function (as with flat gaskets), an o-ring is not effected because metal to metal contact is generally allowed for,
• They are cost-effective where to begin in designing an o-ring seal, it is best to determine the o-ring