Robco Expert

  Pressure capability guidelines: There are many gaskets materials type, and the pressure ability to withstand for each materials type is different. It starts from low pressure for soft gasket material up to high pressure for metallic and semi-metallic gaskets. So, according to the pressure level high or low we need choose the right gasket material to create a reliable seal. The chart below provides a guide to the suitability of our materials in standard ANSI flanges. Note: It should be noted that the ability to withstand assembly load is also dependent on the temperature of the application, and therefore gasket selection must be cheked with the pressure/temperature graphs given for each material. We use Klinger reference of material styles because those are the ones we know best. Materials Class 150 (20 bar) Class 300 (50 bar) Class 600 (100 bar) Class 900 (155 bar) Class 1500 (260 bar) Class 2500 (4...

Style Selection Guide of Metallic Serrated Maxiprofile Gasket: Lotfi Grine, Eng. – Product Specialist at Robco Standard core design is parallel, which offers the advantage of even stress distribution across the gasket face. The LA2 type is used for Male & Female and Tongue & Groove type flanges without outer ring type. LA1 and LA2 types are used for flat face and raised face type flange. Sizes: Standard sizes are offered to fit ASME B16.20 to suit ASME B16.5, ASME B16.47 series A and B pipe flanges. Other non-standard gasket sizes are also available.       Maxiprofile STYLE Cross Section Flange Type Flat Face  Raised Face  Male and Female Tongue and Groove  LA2 Core only-without outer ring.     √ √ LA1 Integral outer ring √ √ ...

  Thomas Cipriani – Product Specialist at Robco DEMYSTIFYING BIODEGRADABLE LUBRICANT TERMINOLOGY! What Does “Biodegradable Lubricant” Really Mean? The O rganization for E conomic C ooperation and D evelopment (OECD) developed a testing standard to determine the biodegradability of a product: OECD 301B. There are 2 classes; A) Readily Biodegradable > The product is able to biodegrade to its natural state after being subject to sunlight, water and/or microbial activity to a percentage of no less than 60% within 28 days. Readily Biodegradable lubricants are made with vegetable or canola base oils and are blended with synthetic esters. B) Inherently Biodegradable > The product is able to biodegrade to its natural state after being subject to sunlight, water and/or microbial activity to a percentage of as low as 20-60% within 28 days. They are most commonly used in sensitive areas requiring a “passing grade” on aquatic animal tests. They use additive chemistry contain...

  SELECTING AN OIL FOR A GEARBOX!   Thomas Cipriani – Product Specialist at Robco When selecting what oil to put into a gearbox we must consider 2 key items: Gear m etallurgy OEM spec ifications r equiring an oil with additives for : Extreme Pressure Rust & Oxidation W ith m etallurgy, t he main concern is with yellow metals (copper, bronze, etc..) Extreme Pressure o ils CANNOT be used as they will attack ing yellow metals. The gearbox OEM specs wi ll call for an oil with either Extreme Pressure additives (meant for heavily loaded bearings) or an oil with Rust & Oxidation additives (most commonly used in gear reducers). The wrong oil in the gearbox will cause premature failure of the gears, so please make sure to verify before switching or selecting your gearbox oils!

High temperature gasket comparison Lotfi Grine, Eng. – Product Specialist at Robco High Temperature Gaskets Gaskets made from elastomers achieve a seal at minimum mechanical load, because of their intrinsic low porosity. Elastomers are also added to enable fibrous-based gaskets to achieve good sealability. However, even the best elastomers or polymers like silicone and PTFE cannot be used at continuous elevated temperatures, above 260°C (500°F), except for a few exotic and very expensive materials that can be used up to 325°C (650°F). What materials can you then choose from ? If we remove chemical resistance from the equation, it will depend mostly on 3 factors : maximum temperatures maximum pressure flange and bolting set-up. This table lists these factors for the various gasket materials available: Gasket Material Continuous Temperature Pressure Load to obtain a seal Sealability   ...