Product Introduction
MDP Hydraulics specializes in reliable filtration solutions for demanding hydraulic systems.
The DF / DFDK Series Change-Over High Pressure Hydraulic Oil Filter is engineered for continuous operation under high pressure, allowing filter element replacement without system shutdown. Designed as a cost-effective OEM-compatible alternative to HYDAC DFDK and DFON filters, it ensures clean oil flow, protects critical components, and minimizes downtime across industrial and mobile hydraulic applications.
Contact MDP Hydraulics today for model matching, fast delivery, and OEM support.
Product Specifications
| Filter specifications |
| Nominal pressure | 420 bar |
| Maximum flow rate | 960 l/min |
| Temperature range | -30°C to+ 100°C(-30°C to -10°C: max. 210 bar) |
| Material of filter head | EN-GJS 400-15 |
| Material of filter bowl | Steel |
| Clogging indicator |
| Type | VD |
| Pressure setting | 5.0 bar (DFF: 8.0 bar) |
| Bypass (optional) |
| Cracking pressure | 6.0 bar |
| Miscellaneous |
| Seal | NBR (= Perbunan) |
| Installation | As inline filter with or without reversibleoil flow |
| Special designs and accessories | Seals in FKM With bypass valve (except for DFF 1500) Oil drain plug up to DF/DFF 280 Element top-removable -type code:3.X(only DF filters 330-1320 |
| Spare parts | See original spare parts list |
| Certificates and approvals | On request |
Features & Benefits
Wide Operating Fluid Compatibility
Compatible with hydraulic oils HL to HVLP (DIN 51524), lubrication oils, compressor oils, biodegradable fluids (HETG, HEES, HEPG), and fire-resistant fluids (HFA–HFD). This flexibility allows one filter solution to serve multiple hydraulic systems, simplifying procurement and inventory management.
Change-Over Design for Continuous Operation
The dual filter housing with change-over valve enables filter element replacement without shutting down the system. This design minimizes downtime, protects production continuity, and is ideal for critical industrial processes.
High-Pressure Rated Construction
Designed for high-pressure hydraulic circuits, the robust steel housing ensures safe and stable operation even under demanding working conditions, reducing the risk of system failure.
Flexible Monitoring Options
Supports visual or electrical clogging indicators, allowing operators to monitor filter condition in real time and plan maintenance proactively, avoiding unexpected system contamination.
System Safety & Compliance Design
Filter housings can be earthed via system piping. Electrical clogging indicators are designed to be safely removed when power is off, ensuring compliance with industrial safety requirements.
Applications
Hydraulic Power Units (HPU) in manufacturing plants requiring uninterrupted operation
Steel, mining, and heavy industry equipment operating under high pressure and continuous load
Mobile hydraulic machinery such as construction and port equipment
Energy, offshore, and marine hydraulic systems using fire-resistant or biodegradable fluids
Centralized hydraulic stations where system cleanliness is critical to component life
FAQ
Q1: Can the filter element be replaced without stopping the system?
Yes. The change-over design allows one filter chamber to remain in operation while the other is serviced.
Q2: What types of hydraulic fluids are supported?
It supports mineral oils, lubrication oils, biodegradable fluids, and fire-resistant fluids. For high water content fluids (>50%), please consult MDP Hydraulics.
Q3: Are clogging indicators included?
Visual or electrical clogging indicators are available as optional configurations based on customer requirements.
Q4: Is grounding required for installation?
Yes. The filter housing should be earthed via the system or piping to ensure operational safety.
