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Relief

Model

YRDCLANAJ

YRDC
Control
  • Standard Options
  • C
    Tamper Resistant - Factory Set
  • F
    Hex Head Screw with Locknut
  • L
    Standard Screw Adjustment
  • W
    Hex Wrench Adjustment
  • Y
    Tri-Grip Handknob
  • Additional Options
  • J
    Capped Screw Adjustment
  • K
    Handknob
  • M
    Capped Screw Adjustment with Lockwire Holes
  • O
    Handknob with Panel Mount
  • Q
    Capped and Lockwired
  • R
    Lockwired Screw Adjustment
  • T
    Tamper Proof - Factory Set
Adjustment Range
  • Preferred Options
  • A
    100 - 3000 psi (7 - 210 bar), 1000 psi (70 bar) Standard Setting
  • W
    150 - 4500 psi (10,5 - 315 bar), 1000 psi (70 bar) Standard Setting
  • Standard Options
  • B
    50 - 1500 psi (3,5 - 105 bar), 1000 psi (70 bar) Standard Setting
  • C
    150 - 6000 psi (10,5 - 420 bar), 1000 psi (70 bar) Standard Setting
  • D
    25 - 800 psi (1,7 - 55 bar), 400 psi (28 bar) Standard Setting
  • E
    25 - 400 psi (1,7 - 28 bar), 200 psi (14 bar) Standard Setting
  • N
    60 - 800 psi (4 - 55 bar), 400 psi (28 bar) Standard Setting
  • Q
    60 - 400 psi (4 - 28 bar), 200 psi (14 bar) Standard Setting
  • Additional Options
  • G
    60 - 3000 psi (4 - 210 bar), 1000 psi (70 bar) Standard Setting
  • H
    30 - 3000 psi (2 - 210 bar), 1000 psi (70 bar) Standard Setting
  • K
    75 - 1500 psi (5 - 105 bar), 1000 psi (70 bar) Standard Setting
  • P
    40 - 400 psi (2,8 - 28 bar), 200 psi (14 bar) Standard Setting
  • V
    150 - 800 psi (10,5 - 55 bar), 400 psi (28 bar) Standard Setting
Seal Material
  • Standard Options
  • N
    Buna-N
  • V
    Viton
Primary Cartridge
  • Standard Options
  • A
    A (with RPEC primary cartridge, Pilot-operated, balanced piston relief valve)
  • A
    A (with RPEC8 primary cartridge, Pilot-operated, balanced piston relief main stage with integral T-8A control cavity)
Port and Material Designation
  • Standard Options
  • J
    Ports P & T — SAE 8; Gage Port — SAE 6; Aluminum
  • V
    Ports P & T — 1/2" BSPP; Gage Port — 1/4" BSPP; Aluminum

Model: YRDC

Triple relief selector assembly

Capacity:

Model

YRDCLANAJ

YRDC
Control
  • Standard Options
  • C
    Tamper Resistant - Factory Set
  • F
    Hex Head Screw with Locknut
  • L
    Standard Screw Adjustment
  • W
    Hex Wrench Adjustment
  • Y
    Tri-Grip Handknob
  • Additional Options
  • J
    Capped Screw Adjustment
  • K
    Handknob
  • M
    Capped Screw Adjustment with Lockwire Holes
  • O
    Handknob with Panel Mount
  • Q
    Capped and Lockwired
  • R
    Lockwired Screw Adjustment
  • T
    Tamper Proof - Factory Set
Adjustment Range
  • Preferred Options
  • A
    100 - 3000 psi (7 - 210 bar), 1000 psi (70 bar) Standard Setting
  • W
    150 - 4500 psi (10,5 - 315 bar), 1000 psi (70 bar) Standard Setting
  • Standard Options
  • B
    50 - 1500 psi (3,5 - 105 bar), 1000 psi (70 bar) Standard Setting
  • C
    150 - 6000 psi (10,5 - 420 bar), 1000 psi (70 bar) Standard Setting
  • D
    25 - 800 psi (1,7 - 55 bar), 400 psi (28 bar) Standard Setting
  • E
    25 - 400 psi (1,7 - 28 bar), 200 psi (14 bar) Standard Setting
  • N
    60 - 800 psi (4 - 55 bar), 400 psi (28 bar) Standard Setting
  • Q
    60 - 400 psi (4 - 28 bar), 200 psi (14 bar) Standard Setting
  • Additional Options
  • G
    60 - 3000 psi (4 - 210 bar), 1000 psi (70 bar) Standard Setting
  • H
    30 - 3000 psi (2 - 210 bar), 1000 psi (70 bar) Standard Setting
  • K
    75 - 1500 psi (5 - 105 bar), 1000 psi (70 bar) Standard Setting
  • P
    40 - 400 psi (2,8 - 28 bar), 200 psi (14 bar) Standard Setting
  • V
    150 - 800 psi (10,5 - 55 bar), 400 psi (28 bar) Standard Setting
Seal Material
  • Standard Options
  • N
    Buna-N
  • V
    Viton
Primary Cartridge
  • Standard Options
  • A
    A (with RPEC primary cartridge, Pilot-operated, balanced piston relief valve)
  • A
    A (with RPEC8 primary cartridge, Pilot-operated, balanced piston relief main stage with integral T-8A control cavity)
Port and Material Designation
  • Standard Options
  • J
    Ports P & T — SAE 8; Gage Port — SAE 6; Aluminum
  • V
    Ports P & T — 1/2" BSPP; Gage Port — 1/4" BSPP; Aluminum
Function
YRDC
Function image

Technical specifications

  • Modifiers
    Ports
    • J
      Ports P & T: SAE 8; Gage Port: SAE 6;
    • V
      Ports P & T: 1/2" BSPP; Gage Port: 1/4" BSPP;
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    Pilot-operated, balanced-piston relief cartridges are normally closed pressure regulating valves. When the pressure at the inlet (port P) reaches the valve setting, the valve starts to open to tank (port T), throttling flow to regulate the pressure. These valves are accurate, have low pressure rise vs. flow, they are smooth and quiet, and are moderately fast. This assembly includes 3 relief valves which allows the selection of 3 separate pressure settings plus an all ports blocked position.

    • Not suitable for use in load holding applications due to spool leakage.
    • Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
    • 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.
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    • Body Type
      Line mount
    • Capacity
      25 gpm
    • Mounting Hole Diameter
      .28 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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    • Number at spool indicator arrow corresponds to selected relief valve. The (X) position (opposite position) is the all-ports blocked position.
    • All handle positions are detented.
    • Handle & stops may be changed to limit valve to 2, 3, or 4 position use.
    • 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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    • Part
      Description
      Quantity
    • 210-010*
      Spool
      1
    • 230-032*
      Sleeve
      1
    • 250-022*
      Retainer
      2
    • 295-002*
      Handle
      1
    • 300-001-005*
      Screw
      2
    • 300-002-005*
      Screw
      1
    • 402-003-075*
      Snap Ring
      2
    • 500-001-016*
      O-Ring
      2
    • 515-002-515*
      Backup Ring
      2
    • 600-052*
      Spring
      2
    • 800-001-080*
      Ball
      4
    • 812-001-001*
      Pin
      1
    • 840-001*
      Handle
      1
    • RPECLAN
      Cartridge - Primary
      3
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