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Cartridge valves offer exceptional versatility
:: 23 June, 2007
Integrated Hydraulics' cartridge valves have excellent characteristics and the LE402 is no exception.
Careful sleeve and spool design give low pressure drops, thereby preventing excessive amounts of energy from being wasted, and the close tolerancing of the spool and sleeve ensures minimal internal leakage.
The valve is flexible in its application and can be used in many hydraulic circuits. It can be controlled by a number of different pilot cartridges; for example, screwing a small 1 l/min relief into the back of the cartridge enables it to function as a main 350bar relief with flows of up to 350 l/min; or fitting a proportional pilot relief valve converts it into a high-flow proportional relief valve. Alternatively, fitting a pilot solenoid valve will produce a 350 l/min electrically operated dump valve. This is an added advantage when it comes to inventory costs. Only one component needs to be stored, as interchangeable valves can then be screwed into the back of it to alter the function.
Because the controlling cartridge is simply screwed into the back end of the main cartridge, the unit is extremely compact. Machining required to install the cartridge is also minimal, as only one cavity is required due to the utilisation of piggy-back valve technology.
The working maximum pressure on the nose is 350bar and maximum tank line pressure is 210bar; the nominal flow rate is 350 l/min. These cartridge valves can be fitted into standard line bodies or used, with other valves required in a system, in hydraulic integrated circuits or manifold blocks. If the latter option is used, the designer can reduce the number of joints in the system, thereby minimising the possibility of oil leaks, and concentrate most or all of the valves into one self contained, pre-tested block both, which speeds assembly and reduces the space requirement.
Integrated Hydraulics' :
Integrated Hydraulics is the global leaders in the design, manufacture and supply of hydraulic screw-in cartridge valves and hydraulic integrated circuits (manifold blocks).
SPECIFICATION-
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 aluminium bar and mild steel or stainless steel, dependant upon the exact requirements of individual applications. Various specialised 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 aluminium 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) as standard and range in size from 1/4 to 1 1/4. SAE ‘O’ Ring and NPT ports are available on request.
SEALS
We use Nitrile as standard for temperatures of -20°C to +90°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 catalogue 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.
NOTE: All our test performances are carried out by using hydraulic oil with a viscosity of 40cSt at 40°C. For water based fluids, ie, 95/5 and 60/40 emulsion consult factory.
FILTRATION
Our valves utilise precision hydraulic components and we recommend a filtration level of between 15 and 25 microns, to produce a cleanliness level of BS5540/4 Class 18/13, dependant 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 tamperproofing methods are available upon request for our range of cartridges and valves.
CARTRIDGE VALVE INSTALLATION
The correct machining of cavities to suit our range of cartridges is critical. Cavity tools are available for sale or hire and certified drawings are available upon request. All drawings and information contained within this catalogue are for guidance only. Where dimensions and actual valve usage is critical, please consult Integrated Hydraulics for full specifications and compatibilities. We reserve the right to alter specifications without notice or incurring obligation.
NOTE: It is important that each designer analyses all aspects of their application including consequences of any failure and review the information concerning the product or system in the current product catalogue. The responsibility for final selection rests with the customer.
TORQUE FIGURES
The torque values stated in this catalogue are for testing purposes only. Assembly tightening torque depends on many factors, including lubrication, coating and surface finish. Contact main office for further information.
ADJUSTMENT
The adjustment range and Max setting figures shown throughout this catalogue give the design range for each valve, higher or lower values may be attainable but should not be used without first contacting our Engineering department. Setting must ALWAYS be carried out using an appropriate gauge and it must NOT be assumed that screwing an adjuster to its maximum or minimum position will yield the maximum or minimum stated design setting for that valve.
PRESSURE EQUIPMENT DIRECTIVE
All pressure control valves manufactured by Integrated Hydraulics are designed to be Pressure Accessories in accordance with article 3 section 3 of the Pressure Equipment Directive and Sound Engineering Practice and sold in good faith as such. For Safety Accessories as defined in article 3 section 1.4 of the Pressure Equipment Directive please contact the UK Technical Sales Department.
Company Location :
In UK :
Integrated Hydraulics Ltd
Collins Road
Heathcote Industrial Estate
Warwick
CV34 6TF
United Kingdom
Tel: +44(0) 1926 881171
Fax: +44(0) 1926 315729
Email: ukinfo@integratedhydraulics.co.uk
Web: www.integratedhydraulics.com
In USA :
Integrated Hydraulics Inc
7047 Spinach Drive
Mentor
Ohio 44060
USA
Tel: (440) 974 3171
Fax: (440) 974 3170
Email: usinfo@integratedhydraulics.com
Web: www.integratedhydraulics.com
In Germany :
Integrated Hydraulics GmbH
Haldenstasser. 18
D-79790 Küssaberg - Bechtersbohl
Germany
Tel: +49 (0) 7742 857369
Fax: +49 (0) 7742 857370
Email: info.de@integratedhydraulics.com
Release link: http://www.engineerlive.com/news/17986/cartridge-valves-offer-exceptional-versatility.thtml
