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Priority Flow Control

Model

XPDBLFNXJ

Control
  • Standard Options
  • L
    Standard Screw Adjustment
  • Additional Options
  • K
    Handknob
Maximum Orifice Diameter
  • Standard Options
  • F
    .33 in. (8,4 mm)
Seal Material
  • Standard Options
  • N
    Buna-N
  • V
    Viton
Primary Cartridge
  • Standard Options
  • X
    X (with NFCD primary cartridge, Fully adjustable needle valve)
Port and Material Designation
  • Standard Options
  • J
    All Ports — SAE 8; Aluminum
  • J/S
    All Ports — SAE 8; Iron
  • U
    All Ports — 3/8" BSPP; Aluminum
  • U/S
    All Ports — 3/8" BSPP; Iron

Model: XPDB

Priority bypass flow divider assembly

Capacity:

Model

XPDBLFNXJ

Control
  • Standard Options
  • L
    Standard Screw Adjustment
  • Additional Options
  • K
    Handknob
Maximum Orifice Diameter
  • Standard Options
  • F
    .33 in. (8,4 mm)
Seal Material
  • Standard Options
  • N
    Buna-N
  • V
    Viton
Primary Cartridge
  • Standard Options
  • X
    X (with NFCD primary cartridge, Fully adjustable needle valve)
Port and Material Designation
  • Standard Options
  • J
    All Ports — SAE 8; Aluminum
  • J/S
    All Ports — SAE 8; Iron
  • U
    All Ports — 3/8" BSPP; Aluminum
  • U/S
    All Ports — 3/8" BSPP; Iron
Function
Function image

Technical specifications

  • Modifiers
    Ports
    • J, J/S
      All Ports: SAE 8;
    • U, U/S
      All Ports: 3/8" BSPP;
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    This assembly provides an efficient way to supply auxiliary hydraulic power to various systems. The assembly divides the inlet flow of port P into a priority flow to port CF with excess flow to port EF. The priority flow is controlled via the adjustable needle valve. In operation, the LH*A priority valve (a bypass/restrictive priority modulating element) will act as a pressure compensator to ensure that the flow to port CF will remain constant during pressure changes. This will ensure a very stable flow rate for a given needle valve setting to control the attachment being driven. With this design, the priority flow is achieved with very low-pressure losses across the needle valve and modulating element and is independent of the pressure at ports CF and EF.

    • Sun Priority Flow Control assemblies utilize bypass/restrictive modulating elements, when combined with an adjustable needle valve, create a bypass/restrictive flow control. Inlet flow port P is directed to the priority or control flow at port 2 to the needle valve. The after-orifice (needle valve) signal is connected to port 1. Once the priority requirements are met, excess flow is bypassed to the EF.
    • The bypass/restrictive modulating element (LH*A) requires 100-psi (7-bar) differential pressure across the throttle valve before modulating to allow flow to EF port.
    • <strong><i>Note:<i></strong> Fully opening the needle valve may not generate the 100-psi (7-bar) differential required to shift the bypass/restrictive modulating element allowing flow to the EF port. The needle valve will need to be adjusted to ensure bypass flow to the EF port.
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    • Body Type
      Line mount
    • Capacity
      15 gpm
    • Mounting Hole Diameter
      .34 in.
    • Mounting Hole Depth
      Through
    • Mounting Hole Quantity
      3

    Model CAD Files

    Files not yet avialable. Click below to request them.

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    • Why doesn't Sun anodize their aluminum bodies?
    • How big is a drop of hydraulic oil?  
    • Direct acting or pilot operated - what do I use?
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    • Important: Carefully consider the maximum system pressure. The pressure rating of the manifold is dependent on the manifold material, with the port type/size a secondary consideration. Manifolds constructed of aluminum are not rated for pressures higher than 3000 psi (210 bar), regardless of the port type/size specified.
    • For detailed information regarding the cartridges contained in this assembly, click on the models codes shown in the Included Components tab.
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