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

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

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

12. Step 3

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

14. 40CN-1

15. 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

17. 40CN-2

18. 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

19. 80CN-2

20. 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

21. Filter Sizing