LPF Series
Inline Filters
1000 PSI • Up to 140 GPM
Features:
- LPF 35/55, 660 filters are manufactured with cast aluminum head and aluminum cold formed bowls.
- Aluminum alloy is water tolerant – anodization is not required for water based fluids (HWBF) – except LPF 660.
- LPF filters sizes 160, 240, and 280 are manufactured with cast aluminum heads, cold formed steel bowls and an aluminum (500 psi) or steel collar (725 psi).
- LPF filters are a desirable substitute for spin-on filters when dynamic fluid conditions call for the superior durability and leakproof quality of a well-constructed cartridge filter.
- Quick-response, bypass valves protect against high differential pressures caused by cold start-ups, flow surges and pressure spikes. Filters can also be supplied without bypasses.
- The simple inline design minimizes pressure drop and provides the significant benefit of compactness. The use of lightweight materials, makes these filters ideal for mobile equipment applications.
- On models LPF 160, 240 and 280, the bowl is affixed to the housing by means of an easily tightened and loosened aluminum or steel collar for fast element changeout.
Technical Details
| Mounting Method | 35 – 55: 3 mounting holes 160 – 280: 2 mounting holes 660: 4 mounting holes |
| Port Connection | 35 – 55: SAE-8, 1/2˝ BSPP 160 – 280: SAE-20, 1-1/4˝ BSPP 660: SAE-24 |
| Flow Direction | Inlet: Side Outlet: Side |
| Construction Materials | Head: Cast Aluminum Collar: 160 – 280: Steel or Aluminum Bowl: 160 – 280: Steel 35 / 55 / 660: Alum. Extru. |
| Flow Capacity | 35: 9 gpm (35 lpm) 55: 15 gpm (55 lpm) 160: 42 gpm (160 lpm) 240: 63 gpm (240 lpm) 280: 74 gpm (280 lpm) 660: 174 gpm (660 lpm) |
| Housing Pressure Rating | Max. Operating Pressure: – 35 – 55: 580 psi (40 bar) – 160 – 280: S¹ 725 psi (50 bar) / A² 500 psi (34.5 bar) – 660: 1000 psi (69 bar) Proof Pressure: – 35 – 55: 870 psi (60 bar) – 160 – 280: S¹ 1088 psi (75 bar) / A² 540 psi (37 bar) – 660: 1500 psi (100 bar) Fatigue Pressure: – 35 – 55: Contact HYDAC – 160 – 280: S¹ 725 psi (50 bar) / A² 360 psi (25 bar) – 660: 1000 psi (69 bar) Burst Pressure: – 35 – 55: Contact HYDAC – 160 – 280: S¹ > 3625 psi (200 bar) / A² Contact HYDAC – 660: 4000 psi (276 bar) |
| Element Collapse Pressure Rating | BH/HC, V: 3000 psid (207 bar) BN/HC, W/HC: 250 psid (17 bar) |
| Fluid Temperature Range | -22° to 250°F (-30° to 121°C) |
| Fluid Compatibility | Compatible with all petroleum oils and synthetic fluids rated for use with Fluoroelastomer or Ethylene Propylene seals. Contact HYDAC for information on special housing and element constructions available for use with water glycols, oil/water emulsions, and HWBF. |
| Indicator Trip Pressure | ΔP = 29 psid (2 bar) – 10% (Optional) ΔP = 72 psid (5 bar) – 10% (Standard) |
| Bypass Valve Cracking Pressure | ΔP = 43 psid (3 bar) + 10% (Optional) ΔP = 87 psid (6 bar) + 10% (Standard sizes 160 – 660) ΔP = 100 psid (7 bar) + 10% (Standard sizes 35 / 55) |
¹Steel Collar
²Aluminum Collar
LF Series
Inline Filters
1500 PSI • Up to 180 GPM
Features:
- Non-welded housing design reduces stress concentrations and prevents fatigue failure.
- Aluminum alloy is water tolerant – anodization is not required for water based fluids (HWBF).
- Inlet and outlet port options include NPT and SAE straight thread O-ring boss to allow easy installation without costly adapters.
- O-ring seals are used to provide positive, reliable sealing. Choice of O-ring materials (Nitrile, Fluoroelastomer, EPDM) provides compatibility with petroleum oils, synthetic fluids, water-glycols, oil/water emulsions, and high water base fluids.
- Screw-in bowl mounted below the filter head requires minimal clearance to remove the element for replacement, and contaminated fluid cannot be washed downstream when element is serviced.
- Differential Pressure Indicators. HYDAC indicators have no external dynamic seal. This results in a high system reliability due to magnetic actuation, thus eliminating a potential leak point.
- A poppet-type bypass valve (optional) is separate from the main flow path (except LF 60 / 110) to provide positive sealing during normal operation and fast opening during cold starts and flow surges.
Technical Details
| Mounting Method | 4 Mounting Holes |
| Port Connection | 30: SAE-8, 1/2˝ NPT, 1/2˝ BSPP 60/110: SAE-12, 3/4˝ NPT, 3/4˝ BSPP 160/240/280: SAE-20, 1-1/4˝ NPT, 1-1/4˝ BSPP 330/660: SAE-24, 1-1/2˝ NPT, 1-1/2˝ BSPP |
| Flow Direction | Inlet: Side Outlet: Side |
| Construction Materials | Head: Cast Aluminum Bowl: Aluminum Extrusion (sizes 30 – 330); Steel (sizes 280 & 660) |
| Flow Capacity | 30: 8 gpm (30 lpm) 60: 16 gpm (60 lpm) 110: 29 gpm (110 lpm) 160: 42 gpm (160 lpm) 240: 63 gpm (240 lpm) 280: 74 gpm (280 lpm) 330: 84 gpm (330 lpm) 660: 174 gpm (660 lpm) |
| Housing Pressure Rating | Maximum Operating Pressure: 1500 psi (100 bar) Proof Pressure: 2250 psi (150 bar) Fatigue Pressure: 1500 psi (100 bar) Burst Pressure: – Size 30: 5,510 psi (380 bar) – Sizes 60-660: >6090 psi (420 bar) |
| Element Collapse Pressure Rating | BH/HC, V 3000 psid (207 bar) BN/HC, W/HC 250 psid (17 bar) |
| Fluid Temperature Range | -22° to 250°F (-30° to 121°C) |
| Fluid Compatibility | Compatible with all petroleum oils and synthetic fluids rated for use with Fluoroelastomer or Ethylene Propylene seals. Contact HYDAC for information on special housing and element constructions available for use with water glycols, oil/water emulsions, and HWBF. |
| Indicator Trip Pressure | ΔP = 29 psid (2 bar) – 10% (Optional) ΔP = 72 psid (5 bar) – 10% (standard) |
| Bypass Valve Cracking Pressure | ΔP = 43 psid (3 bar) + 10% (Optional) ΔP = 87 psid (6 bar) + 10% (standard) |
FMND Series
Inline Duplex Filters
3000 PSI • Up to 100 GPM
Features:
- The FMND filter consists of a ductile iron filter head with built-in change-over valve and three different lengths of screw-in filter bowls.
- The FMND filter can be supplied with or without bypass valve, but includes vent and drain screws, and also a connection for a differential pressure clogging indicator.
- Pressure equalization requirement is achieved by raising the change-over lever prior to switching it to the relevant filter side.
- Fatigue pressure rating = maximum allowable working pressure rating.
Technical Details
| Mounting Method | 4 Mounting Holes |
| Port Connection | SAE-24 |
| Flow Direction | Inlet: Side Outlet: Side |
| Construction Materials | Head: Ductile Iron Bowl: Steel |
| Flow Capacity | 160: 42 gpm (160 lpm) 250: 66 gpm (250 lpm) 400: 100 gpm (400 lpm) |
| Housing Pressure Rating | Maximum Operating Pressure: 3000 psi (207 bar) Proof Pressure: 4500 psi (315 bar) Fatigue Pressure: 3000 psi (210 bar) @ 1 million cycles Burst Pressure: 10,650 psi (735 bar) |
| Element Collapse Pressure Rating | BH/HC: 3000 psid (207 bar) BN/HC, W/HC: 250 psid (17 bar) |
| Fluid Temperature Range | -22° to 250°F (-30° to 121°C) |
| Fluid Compatibility | Compatible with all petroleum oils and synthetic fluids rated for use with Fluoroelastomer or Ethylene Propylene seals. Contact HYDAC for information on special housing and element constructions available for use with water glycols, oil/water emulsions, and HWBF. |
| Indicator Trip Pressure | ΔP = 29 psid (2 bar) – 10% (optional) ΔP = 72 psid (5 bar) – 10% (standard) |
| Bypass Valve Cracking Pressure | ΔP = 102 psid (7 bar) + 10% |