--- title: PF4 High Pressure Base Mounted Filter Assemblies Specifications description: PF4 high pressure filter assemblies are ideal for servo valves and other components that need clean pressurized fluid to operate reliably | Hy-Pro Filtration image: https://www.hyprofiltration.com/hubfs/PF4%20Drawing.png --- [![Donaldson Hy-Pro](https://www.hyprofiltration.com/hs-fs/hubfs/Donaldson%20Hy-Pro%20Logo_Blue.png?width=170&height=76&name=Donaldson%20Hy-Pro%20Logo_Blue.png) ![Donaldson Hy-Pro](https://www.hyprofiltration.com/hs-fs/hubfs/Donaldson%20Hy-Pro%20Logo_Blue.png?width=170&height=76&name=Donaldson%20Hy-Pro%20Logo_Blue.png) ](https://www.hyprofiltration.com?hsLang=en) [**](https://www.hyprofiltration.com/products/filter-assemblies/high-pressure-assemblies/pf4-specifications#tmpmodule_1710871496765239) [![Distributors](https://no-cache.hubspot.com/cta/default/170326/6a993b6f-f737-4a22-8a35-a45c4da5c3b4.png)](https://cta-redirect.hubspot.com/cta/redirect/170326/6a993b6f-f737-4a22-8a35-a45c4da5c3b4) [![eCatalog](https://no-cache.hubspot.com/cta/default/170326/4050f587-90b6-4151-8b5e-82d87ca58336.png)](https://cta-redirect.hubspot.com/cta/redirect/170326/4050f587-90b6-4151-8b5e-82d87ca58336) ** ## PF4 High Pressure Base Mounted Filter Assemblies Hy-Pro PF4 pressure filters are designed for protecting sensitive components in hydraulic circuits. Install the series upstream of specific components or directly after the pressure pump to minimize risk of failure and costly system downtime. Ideal for components that are sensitive to particulate contamination, such as the servo valve, and require clean pressurized fluid for reliable operation.   [![Download Brochure](https://no-cache.hubspot.com/cta/default/170326/55e0b094-22e8-4d2e-9005-9c7f5c295a4b.png)](https://cta-redirect.hubspot.com/cta/redirect/170326/55e0b094-22e8-4d2e-9005-9c7f5c295a4b) PF4 Drawing ![PF4 Drawing](https://www.hyprofiltration.com/hs-fs/hubfs/PF4%20Drawing.png?width=6300&name=PF4%20Drawing.png "PF4 Drawing") --- Operating Temperature -20°F to 250°F (-29°C to 121°C)     operating Pressure 6,000 psi (414 bar) max code 62 port only 5,500 psi (379 bar) max all other ports Flow Fatigue Rating 3,500 psi (238 bar) Burst Pressure 16,400 psi (1130 bar) ΔP Indicator Trigger 70 psid (4.8 bard) for both bypass and non-bypass Refer to Appendix for indicator wiring diagrams Element Collapse Rating #### HPK 290 psid (20.0 bard) #### HPK3 3000 psid (206.8 bard) #### HPK5 5000 psid (344.7 bard) #### HPKC 150 psid (10.3 bard) Inegral bypass setting 90 psid (6.2 bard) Materials of Construction #### Head/Lid Ductile iron #### Bowl Seamless steel tubing #### Assembly Bypass Valve Delrin media Description #### M G8 Dualglass, our latest generation of DFE rated, high performance glass media for all hydraulic & lubrication fluids. βx[C] ≥ 4000 #### A G8 Dualglass high performance media combined with water removal scrim. βx[C] ≥ 4000 #### W Stainless steel wire mesh media βx[C] ≥ 2 Fluid Compatibility Petroleum and mineral based fluids (standard). For polyol ester, phosphate ester, and other specified synthetic fluids use fluorocarbon seal option or contact factory. Replacement Elements ![PF4 replacement elements](https://www.hyprofiltration.com/hs-fs/hubfs/Hy-Pro%20Website%20Images/PF4/Screen%20Shot%202018-06-28%20at%209.55.40%20AM.png?width=1699&name=Screen%20Shot%202018-06-28%20at%209.55.40%20AM.png "PF4 replacement elements") ΔP Factor ![PF4](https://www.hyprofiltration.com/hs-fs/hubfs/PF4_Kfactors.png?width=975&name=PF4_Kfactors.png "PF4") Max flow rates and ΔP factors assume υ = 150 SUS, 32 cSt. See filter assembly sizing guideline for viscosity conversion formula on page 22 for viscosity change. Filter sizing chart ![PF4 filter sizing chart](https://www.hyprofiltration.com/hs-fs/hubfs/Hy-Pro%20Website%20Images/All/page22-1.png?width=1273&name=page22-1.png "PF4 filter sizing chart") Max flow rates and ΔP factors assume υ = 150 SUS, 32 cSt. See filter assembly sizing guideline for viscosity conversion formula on page 22 for viscosity change. ## Have a Question for Donaldson Hy-Pro? [![Contact Us](https://no-cache.hubspot.com/cta/default/170326/82b6a151-2481-4e91-9cac-0d88a5679d18.png)](https://cta-redirect.hubspot.com/cta/redirect/170326/82b6a151-2481-4e91-9cac-0d88a5679d18) [**](https://www.linkedin.com/company/hy-pro-filtration) [**](https://www.youtube.com/c/hyprofiltration) [![Donaldson Hy-Pro Logo](https://www.hyprofiltration.com/hs-fs/hubfs/Hy-Pro%20Logos/Donaldson%20Hy-Pro%20Logo%202.png?width=130&height=58&name=Donaldson%20Hy-Pro%20Logo%202.png "Donaldson Hy-Pro Logo")](https://www.hyprofiltration.com?hsLang=en) Donaldson Hy-Pro 6810 Layton Road Anderson IN, 46011 | +1 (317) 849-3535 | info@hyprofiltration.com | All Rights Reserved 2026 ** [[fa icon="chevron-up"]](https://www.hyprofiltration.com/products/filter-assemblies/high-pressure-assemblies/pf4-specifications#)