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SUN HYDRAULICS
PBJBYCN


$387.10 USD

Tags:

  • SUN HYDRAULICS
  • Material:PBJBYCN
  • Model:PBJB-YCN
  • Summary:Cartridge

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***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Sun Hydraulics directly.***
The Sun Hydraulics PBJBYCN (PBJBYCN) is a pilot-operated pressure reducing valve designed to manage high primary pressures at the inlet port, reducing them to a consistent lower pressure at port 1. This valve enables the operation of circuits with varying pressure needs using a single pump. It is interchangeable with other three-port pressure reducing and relieving cartridges, maintaining the same flow path and cavity for a given frame size. The valve features a main stage orifice protected by a 150-micron stainless steel screen and incorporates Sun's floating style construction to minimize internal binding due to installation torque or machining variations. The recommended maximum inlet pressure varies based on the adjustment range, with ranges D, E, N, and Q tested up to 2000 psi differential and ranges C and W up to 5000 psi. This model is suitable for applications where pilot flow consumption is not critical, as it exhibits stable performance with low hysteresis but slower response times compared to direct acting valves. For circuits requiring reverse free flow from port 1 to port 2, an additional check valve may be necessary. The PBJBYCN can handle a maximum operating pressure of 5000 psi at port 3, which directly affects the valve setting in a 1:1 ratio. The product is also configured with EPDM seals for compatibility with phosphate ester fluids while being susceptible to damage from petroleum-based substances. This cartridge-style valve has an installation torque range of 350-375 lbf ft and requires specific adjustments for optimal performance: it features an internal hex adjustment screw size of 5/32 inches and a locknut hex size of 9/16 inches. It supports capacities up to 80 gpm (320 L/min) and weighs approximately 2.90 lb (1.30 kg).

Pilot-operated, pressure reducing valves reduce a high primary pressure at the inlet (port 2) to a constant reduced pressure at port 1, allowing circuits with multiple pressure requirements to be operated using a single pump.

  • All three-port pressure reducing and reducing/relieving cartridges are physically interchangeable (i.e. same flow path, same cavity for a given frame size). When considering mounting configurations, it is sometimes recommended that a full capacity return line (port 3) be used with reducing/relieving cartridges.
  • Full reverse flow from reduced pressure (port 1) to inlet (port 2) may cause the main spool to close. If reverse free flow is required in the circuit, consider adding a separate check valve to the circuit.
  • If pilot flow consumption is critical, consider using direct acting reducing/relieving valves.
  • Main stage orifice is protected by a 150 micron stainless steel screen.
  • Recommended maximum inlet pressure is determined by the adjustment range. Ranges D, E, N, and Q are tested with a 2000 psi (140 bar) maximum differential between inlet and reduced pressure. Ranges A, B, and H are tested with a 3000 psi (210 bar) maximum differential between inlet and reduced pressure. Ranges C and W are tested with 5000 psi (350 bar) of inlet pressure.
  • Pilot operated valves exhibit exceptionally flat pressure/flow characteristics, are very stable and have low hysteresis.
  • Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar).
  • Pilot operated reducing, reducing/relieving valves by nature are not fast acting valves. For superior dynamic response, consider direct acting valves.
  • Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
  • Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.

CavityT-19A
Series4
Capacity80 gpm320 L/min.
Factory Pressure Settings Established atblocked control port (dead headed)blocked control port (dead headed)
Maximum Operating Pressure5000 psi350 bar
Control Pilot Flow15 - 20 in³/min.0,25 - 0,33 L/min.
Adjustment - Number of Clockwise Turns to Increase Setting55
Valve Hex Size1 5/8 in.41,3 mm
Valve Installation Torque350 - 375 lbf ft474 - 508 Nm
Adjustment Screw Internal Hex Size5/32 in.4 mm
Locknut Hex Size9/16 in.15 mm
Locknut Torque80 - 90 lbf in.9 - 10 Nm
Model Weight2.90 lb1,30 kg
Seal kit - CartridgeViton: 990-019-006

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Notes:
  • Maximum pressure differentials for spring ranges: A and B are 3000 psi (210 bar) N and Q are 2000 psi (140 bar) W is 5000 psi (350 bar)inlet pressure