Screw-in Cartridge Valves

Danfoss screw-in cartridge valves provide many advantages over traditional hydraulic valves. While offering the same control functions as traditional hydraulic valves, screw-in cartridge valves are compact, reliable, and economical.

The concept of combining multiple cartridge valves in a common manifold offers both the mobile and industrial user substantial cost-saving advantages that cannot be achieved with traditional valving. Here are some of the advantages of Danfoss cartridge valves:

• Response times and efficiency gains, by eliminating many of the hoses, tubes and fittings necessary in traditional installations
• Fewer potential leakage points than with conventional valves ensuring cleaner, safer application environments
• Compact and neat assemblies for economy of space and weight
• Increased ability to withstand vibration, giving optimum machine reliability and performance
• Multiple mounting configurations offers maximum design flexibility
• Greater contamination tolerance
• Faster cycle times
• Lower noise levels
• Faster on-sight servicing and troubleshooting
• Resistance to fluid contamination
• Hardened ground steel operating parts

Materials

Cartridge bodies are manufactured from high grade cold drawn steel bar, with the internal working parts hardened and ground for maximum performance and durability. Our line bodies, Hydraulic Integrated Circuit blocks and special bodies are manufactured from high strength, wrought aluminum bar and mild steel or stainless steel, dependent upon the exact requirements of individual applications. Various specialized coatings/ finishes are obtainable for when environmentally unfriendly conditions are a consideration. For complete specifications and compatibilities, please consult our technical department.

It is recommended that for pressures above 210 bar (3000 psi) steel bodies are used. Whilst in most cases the aluminum bodies are strong enough, if transient peak pressures are encountered frequently, there is a possibility of fatigue.

Ports

The ports on all our bodies are BSP (parallel) and SAE O-ring and range in size from 1/4" to 1-1/4". NPT ports are available on request.

Seals

We use Nitrile as standard for temperatures of -30º C to +90º C (unless otherwise stated). Viton seals are available on request. Polyurethane seals are also available on some valves but care must be taken in their application with regard to fluid compatibility.

Temperature ranges

Temperature ranges quoted throughout this catalog relate to the seal material only. The viscosity index of the fluid should also be taken into account when selecting a valve. If in doubt please contact our technical department.

Fluids

Recommended fluid is mineral oil.

Filtration

Our valves utilize precision hydraulic components and we recommend a filtration level of between 15 and 25 microns, to produce a cleanliness level of ISO4406:2000 Class 18/16/13, dependent on the type of valve used. Replace filter elements regularly, try to avoid filter bypass condition - special attention should also be paid to filtration when first commissioning the system or machine, when contamination levels are high.

Tamperproof devices

Various tamper proofing methods are available upon request for our range of cartridges and valves.