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.

Ouverture par déblocage du drain, spring-biased closed, à clapet non équilibré élément logique avec source du pilotage à l'orifice 1 ou 2

Capacité: 300 gpm1100 L/min. | Cavité: T-19AU

Développer

Caractéristiques techniques [ + ]

Ces éléments logiques non équilibrés qui se ferment quand on les pilote sont des valves tout ou rien à 2 voies, normalement fermées par ressort qui incorporent un sélecteur intégral permettant d’utiliser comme source de pilotage la plus élevée des pressions des chambres 1 et 2. Si la chambre 3 est bloquée, la valve est maintenue en position fermée par le ressort. Si la chambre 3 est drainée, la valve s’ouvre à condition que la pression soit suffisante pour vaincre la force du ressort. Pour que la valve reste fermée, la force générée dans la chambre 3 augmentée de la force du ressort doit être supérieure à la somme des forces agissant dans les chambres 1 et 2. NOTE: La section de pilotage (chambre 3) est égale à 1,8 fois la section de la chambre 1 et 2,25 fois la section de la chambre 2.

Ces valves fonctionnent dans les cavités standard T-19A Sun mais pour obtenir les performances optimales, il faut utiliser les cavités T-19AU.
Cette valve possède des joints d'étanchéité entre l'orifice 2 et le pilotage.
Ces valves s’ouvrent rapidement lors du déblocage du drain. Le temps nécessaire à la fermeture est difficile à évaluer car il dépend du niveau du débit et de la perte de charge créée au fur et à mesure de la fermeture.
Le pilotage de plusieurs clapets logiques de ce modèle par une seule valve de pilotage n’est pas conseillé. Le clapet navette laisse passer un débit entre les différentes valves. Un clapet anti-retour placé sur la ligne de pilotage de chaque valve permet de résoudre ce problème.
Ces valves à clapets non équilibrés, sont sensibles à la pression. L'ouverture et la fermeture du clapet sont fonction des efforts dus à la pression s'appliquant sur les 3 sections suivantes : Orifice 1 = 100%, Orifice 2 = 80%, et section de pilotage = 180%.
Tous les orifices étant sensibles à la pression, il est impératif de considérer tous les aspects du fonctionnement du système durant un cycle complet. Une variation de la pression à l’un des orifices peut provoquer la fermeture ou l’ouverture intempestive de la valve. La réalisation d’un système fonctionnel et sûr impose une connaissance de l’évolution de tous les niveaux de pression dans le circuit.
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.

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.

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.

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Related Models [ + ]

Ressources Complémentaires [ + ]

Cavité	T-19AU
Taille	4
Capacité	300 gpm1100 L/min.
Pression maximale de fonctionnement	5000 psi350 bar
Fuite Maximale à 24 cSt (100 SUS)	10 drops/min.0,7 cc/min.
Volume nécessaire au pilotage	0,47 in³7,7 cc
Rapport de Surface entre A3 et A1	1,8/11,8/1
Rapport de Surface entre A3 et A2	2,25/12,25/1
Diamètre des Gicleurs	0,035 in.0,9 mm
Dimensions du six pans de la valve	1"5/8 in.41,3 mm
Couple de serrage de la valve	350 - 375 lbf ft474 - 508 Nm
Poids du composant	2,60 lb1,20 kg
Seal kit - Cartridge	Buna: 990019007
Seal kit - Cartridge	Polyurethane: 990019002
Seal kit - Cartridge	Viton: 990019006

LOKD | Cartouches » Directional » Éléments Logiques | Sun Hydraulics

Assembly Build Process

Assembly Build Process

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Ouverture par déblocage du drain, spring-biased closed, à clapet non équilibré élément logique avec source du pilotage à l'orifice 1 ou 2

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