ブックタイトルHYDRAULIC SNUBBERS
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HYDRAULIC SNUBBERS
2.7 Major Design Specifications1. Applicable Code and Standard① JIS (Japanese Industrial Standard) Code② MSS (Manufacturers Standardization Society) Standard③ ASTM (American Society of Testing and Materials) Standard④ SSPC (Steel Structure Painting Council) Standard2. Design Parameters and Conditioins3. Minimum Spring Rate (kN/mm)4. Properties of Seals and Hydraulic Fluid2. HYDRAULIC SNUBBERDrag Force (Frictional Resistance) Max. 2% of the rated load, or 0.49kN, Whichever is greater.Bleed Rate (Release Rate) 0.2 ～ 2.0 mm/sec.Lock-up Rate 2.0 ～ 6.0 mm/sec.Applicable Frequency Range 1 Hz ～ 33 HzLost Motion Max. 2.0 mmDesign Safety Margin (＊) Withstand 150% of the rated load without loss of proper function.Ultimate Strength (＊) Withstand 200% of the rated load without loss of structual integrity.Loading Capacity (under 100% rated load) 20,000 loading cycles.Applicable Ambient Temperature Max. 70°CDesign Life 40 years.Recommended Maintenance Period Once every 10 years.Angular Offset Max. ± 7.5°＊This value is applicable to Size SN25 and less, and the stroke shorter than 250mm.Group Parts / Parameters Material / CharacteristicsSealsO-Ring FKMDust Seal NBRAccumulator EPDMFluidFluid Non-Flammable Silicone OilAppearance Transparent and odorlessViscosity 47.5 - 52.5 (CS-25°C)Specific Gravity 0.955 - 0.965 (25°C)Flash Point 300°C or overVolatile 5% or lower (150°C-24 Hour)Pour Point -50°C or lower*For Spring Rate of larger size, longer stroke snubbers, contact the manufacturer.SizeStroke (mm)100/160 250SN-03 2.45 1.47SN-06 2.94 1.96SN- 1 4.90 2.94SN- 3 14.70 9.81SN- 6 29.40 19.61SN-10 49.03 29.42SizeStroke (mm)100/160 250SN-16 68.65 44.13SN-25 98.07 63.74SN-40 117.68 78.45SN-60 137.29 88.26SN-100 230.46 147.1010