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Filter Sizing

Filter Sizing. Pressure drop determines filter size. Filter Sizing. Pressure drop depends on: Filter Housing Media Grade Fluid Viscosity Temperature Oil Type Flow Rate. Filter Sizing. Parker Rule-of-Thumb :. Maximum Element Clean Pressure Loss: 1/3 bypass valve setting, or less.

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Filter Sizing

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  1. Filter Sizing

  2. Pressure drop determines filter size

  3. Filter Sizing • Pressure drop depends on: • Filter Housing • Media Grade • Fluid Viscosity • Temperature • Oil Type • Flow Rate

  4. Filter Sizing Parker Rule-of-Thumb: Maximum Element Clean Pressure Loss: 1/3 bypass valve setting, or less

  5. 50 psid bypass valve 3 = 16.7 psid Filter Sizing

  6. Sizing Example • Fluid: Exxon Teresstic 32 • Flow: 40 gpm • Pressure: 800 psi • Filtration Specification: B6=200 • Operating Temperature: 70oF to120oF • Bypass Valve: 50 psid • Ports: 1 1/2” • Full filtration required at the most extreme conditions

  7. Step 1 • Determine Viscosity Range

  8. Exxon Teresstic 32 Specifications Data from Exxon handbook: 166 SUS @ 100oF 44 SUS @ 210oF Results from chart: 70oF = 400 SUS 120oF = 110 SUS

  9. Step 2 • Determine viscosity range • Select housing series based on system pressure, mounting, options

  10. Step 3 • Determine viscosity range • Select housing series based on system pressure, mounting, options • Select media grade to match B6 = 200

  11. Step 3

  12. Step 4 • Determine viscosity range • Select housing series based on system pressure, mounting, options • Select media grade to match B6 = 200 • Calculate pressure loss

  13. 40CN-1

  14. Step 4 40CN-1 05Q (150 SUS) 40CN-1 05Q (400 SUS) Element = 12 psid Element = 32 psid 12(400/150) = 32 Housing = 3.5 psid Housing = 3.5 psid Total = 15.5 psid Total = 35.5 psid

  15. 40CN-2

  16. Step 4 40CN-2 05Q (400 SUS) Element = 16.0 psid 6(400/150) = 16.0 Housing = 3.5 psid Total = 19.3 psid 40CN-2 05Q (150 SUS) Element = 6 psid Housing = 3.5 psid Total = 9.5 psid

  17. 80CN-2

  18. Step 4 80CN-2 05Q (400 SUS) Element = 8 psid 3.0(400/150) = 8 Housing = 1.5 psid Total = 9.5 psid 80CN-2 05Q (150 SUS) Element = 3.0 psid Housing = 1.5 psid Total = 4.5 psid

  19. Filter Sizing

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