Assembly Build Process

Sun's Assembly Build Process allows you to configure a cartridge and manifold, or main stage and pilot stage cartridge, and build a digital assembly in three dimensional space. The resulting output of this process is the assembly product page, including configuration-specific images, symbols, product information and CAD files for download.

The Assembly Build Process can be accessed from either a cartridge or manifold product page. Only valid choices are allowed.

From a manifold page, you must first choose your cartridge function. Once you choose your function, click on the BUILD ASSEMBLY button below the WHERE TO BUY BUTTON. Once clicked, you will be presented with valid cartridges for your manifold. Select the cartridge of your choice and follow the instructions at the top of the page. If your particular combination has been generated before, the resulting assembly page will be available immediately. If not, you will be asked to enter your email address. Once the page is complete, an email will be sent to you including a link to the assembly product page.

From a cartridge product page, click on BUILD ASSEMBLY and you will be presented with a listing of compatible manifolds. In the case of main stage and pilot stage cartridges, you can either build a cartridge to cartridge assembly or a cartridge to manifold assembly. Once your choice has been made, follow the instructions at the top of the page. If your particular combination has been generated before, the resulting assembly page will be available immediately. If not, you will be asked to enter your email address. Once the page is complete, an email will be sent to you including a link to the assembly product page.

Please note that the Assembly Build Process is an automated process. It can be utilized at any time. Pages are generated typically within minutes but delays can occasionally be expected. In the event of a delay, a team at Sun will work to resolve the issue to ensure you receive your information as quickly as possible.

Élément logique, normalement fermé, à clapet équilibré, avec cavité de pilotage T-8A intégrée - ouverture par déblocage du drain

Capacité: 15 gpm60 L/min. | Cavité: T-21A

Développer

Caractéristiques techniques [ + ]

Cette valve est un élément logique à clapet normalement fermé, qui commute quand on libère le drain, et qui intègre une cavité destinée à une valve de pilotage. Elle est hydrauliquement équilibrée entre les chambres 1 et 2 et le ressort principal maintient la valve fermée. Lorsque la valve pilote 2/2 installée dans la cavité T-8A est en position fermée, la valve logique reste fermée. Avec une pression de pilotage suffisante à l’orifice 3, l’ouverture de la valve pilote déséquilibre le clapet et la valve logique commute à la position ouverte. Les valves de pilotage existent également avec des commandes manuelles, hydrauliques et pneumatiques.

La conception de cette valve à clapet équilibré permet de commuter avec 350 bar aux orifices 1 et 2 lorsque la pression de pilotage est de 30 bar minimum et que la valve de pilotage est ouverte.
Ces valves sont hydrauliquement équilibrées entre l’orifice 1 et l’orifice 2.
Les orifices 1 et 2 sont étanches par rapport aux orifices 3 et 4. L’orifice 3 est étanche par rapport à l’orifice 4.
Toute contre-pression à l’orifice du drain augmente d’autant la valeur de la pression de pilotage nécessaire à la commutation de la valve.
Le débit de fuite entre les orifices 1 et 2 est très faible : moins de 10 gouttes /min (0,7 cm3/min) à 350 bar.
La valve se referme si la pression de pilotage tombe en dessous de 10 bar.
NOTE: Avec l'option 8, il convient d'installer d'abord l'étage de puissance au couple de serrage correct, puis de monter dans ce dernier la valve de pilotage T-8A au couple préconisé.
L’option 8 permet de visser une valve de pilotage directement dans la tête de la cartouche via la cavité T-8A. Les cartouches de pilotage, à commander séparément, peuvent être à commande électrique, pneumatique ou hydraulique. Se référer aux valves de pilotage.
Tous les orifices acceptent 350 bar.
Cette valve intègre le concept Sun de la cartouche à visser "flottante" qui permet de minimiser les contraintes internes dues à un couple de serrage excessif de la cartouche et/ou à des écarts d’usinage des cavités ou des cartouches.

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Caractéristiques [ + ]

Performance Curves [ + ]

FAQs [ + ]

Quel est le volume d'une goutte d'huile hydraulique ?

Il y a exactement 15 gouttes Sun dans un centimètre cube.

Direct acting, pilot operated, what do I use?

Direct acting valves are used to prevent over pressure and pilot operated valves are used to regulate pressure. If you are unsure, use a direct acting valve. Sun's direct acting valves are very fast, dirt tolerant, stable, and robust. Sun's pilot operated valves are moderately fast, they have a low pressure rise vs. flow curve, and they are easy to adjust.

I need to discharge a large accumulator. How can I increase the capacity of my discharge circuit?

Because of the very high ratio, the COFO has limited capacity. The discharge path is across a .050 inch (1,3 mm) diameter orifice. If you have large accumulators combined with low precharge pressures, this may not discharge the energy quickly enough. Using the COFO XDN cartridge in conjunction with an LODA XDN will provide capacity for larger applications.

The LH*A looks like just the valve I need to pressure compensate my load-sense whatever. Will it work?

The LH*A family of valves has been optimized to be used in a package to provide a power source for hydraulic tools. We can quantify the performance of the valve in static conditions but we cannot tell you how it will do in your application.

For instance: You want to use the valve as a compensator for a load-sense power steering package. When you are steering the machine and raising an implement, the valve is in a bypass mode (throttling on the bypass side). When the implement actuator bottoms out, pressure jumps to maximum and now the valve needs to change to the restrictive mode. Since the LH*A is balanced against pressure on the bypass side the only thing moving the spool is its own spring. The time this takes is dependent on where the spool was to begin with and where it has to go.

During this transition the steering will see the pressure differential across it suddenly change from about 150 psi (10 bar) to a system pressure of say 3000 psi (200 bar) and suddenly back down to about 150 psi (10 bar). When this scenario was described to me it was termed the broken thumb syndrome.

Sun does not and cannot provide technical support for this type of application. The valve has been successfully used in similar applications. What is necessary to make it work is up to whoever is doing the application.

What parts of the Sun cartridge valve are field serviceable?

Only external seals are serviceable. Sun offers replacement seal kits for all cartridge models. The applicable kit part number can be found in the product page's Technical Data table or by using our Cartridge Seal Kit search function located under Accessories. Please note: Converting the external seals from one material to another does not ensure fluid compatibility with that material due to the existence of internal seals within the cartridge.

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Related Models [ + ]

Notes [ + ]

Ressources Complémentaires [ + ]

Cavité	T-21A
Taille	1
Capacité	15 gpm60 L/min.
Pression maximale de fonctionnement	5000 psi350 bar
Pression de pilotage minimale pour commuter la valve	400 psi28 bar
Contrôle du Débit de Pilotage	See Performance DataSee Performance Data
Fuite Maximale à 24 cSt (100 SUS)	10 drops/min.@5000 psi0,7 cc/min.@350 bar
Cavité de la pilote	T-8AT-8A
Couple de serrage de la pilote	20 à 25 lbf ft27 - 33 Nm
Dimension du six-pans de la pilote	7/8 in.22,2 mm
Dimensions du six pans de la valve	7/8 in.22,2 mm
Couple de serrage de la valve	30 à 35 lbf ft41 - 47 Nm
Poids du composant	0,35 lb0,15 kg
Seal kit - Cartridge	Buna: 990021007
Seal kit - Cartridge	Polyurethane: 990021002
Seal kit - Cartridge	Viton: 990021006

DKDR8 | Cartouches » Directional » Éléments Logiques | Sun Hydraulics

Assembly Build Process

Assembly Build Process

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Élément logique, normalement fermé, à clapet équilibré, avec cavité de pilotage T-8A intégrée - ouverture par déblocage du drain

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