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Relief

Model

YRFNLANAM

Control
  • Standard Options
  • C
    Tamper Resistant - Factory Set
  • L
    Standard Screw Adjustment
  • Additional Options
  • K
    Handknob
  • Q
    Capped and Lockwired
Adjustment Range
  • Standard Options
  • W
    800 - 4500 psi (55 - 315 bar), 1000 psi (70 bar) Standard Setting
  • Additional Options
  • A
    500 - 3000 psi (35 - 210 bar), 1000 psi (70 bar) Standard Setting
  • B
    300 - 1500 psi (20 - 105 bar), 1000 psi (70 bar) Standard Setting
  • C
    1000 - 6000 psi (70 - 420 bar), 1000 psi (70 bar) Standard Setting
  • D
    200 - 800 psi (14 - 55 bar), 400 psi (28 bar) Standard Setting
  • E
    100 - 400 psi (7 - 28 bar), 200 psi (14 bar) Standard Setting
  • S
    50 - 200 psi (3,5 - 14 bar), 100 psi (7 bar) Standard Setting
Seal Material
  • Standard Options
  • N
    Buna-N
  • V
    Viton
Primary Cartridge
  • Standard Options
  • A
    A (with RDFA primary cartridge, Direct-acting relief valve)
  • A
    A (with RDFA3 primary cartridge, Non-adjustable direct-acting relief valve)
Port and Material Designation
  • Standard Options
  • M
    Ports V1 & V2 — SAE 16; Port T — SAE 12; Aluminum
  • M/S
    Ports V1 & V2 — SAE 16; Port T — SAE 12; Iron

Model: YRFN

Cross-port, relief assembly, with anti-cavitation checks

Capacity:

Model

YRFNLANAM

Control
  • Standard Options
  • C
    Tamper Resistant - Factory Set
  • L
    Standard Screw Adjustment
  • Additional Options
  • K
    Handknob
  • Q
    Capped and Lockwired
Adjustment Range
  • Standard Options
  • W
    800 - 4500 psi (55 - 315 bar), 1000 psi (70 bar) Standard Setting
  • Additional Options
  • A
    500 - 3000 psi (35 - 210 bar), 1000 psi (70 bar) Standard Setting
  • B
    300 - 1500 psi (20 - 105 bar), 1000 psi (70 bar) Standard Setting
  • C
    1000 - 6000 psi (70 - 420 bar), 1000 psi (70 bar) Standard Setting
  • D
    200 - 800 psi (14 - 55 bar), 400 psi (28 bar) Standard Setting
  • E
    100 - 400 psi (7 - 28 bar), 200 psi (14 bar) Standard Setting
  • S
    50 - 200 psi (3,5 - 14 bar), 100 psi (7 bar) Standard Setting
Seal Material
  • Standard Options
  • N
    Buna-N
  • V
    Viton
Primary Cartridge
  • Standard Options
  • A
    A (with RDFA primary cartridge, Direct-acting relief valve)
  • A
    A (with RDFA3 primary cartridge, Non-adjustable direct-acting relief valve)
Port and Material Designation
  • Standard Options
  • M
    Ports V1 & V2 — SAE 16; Port T — SAE 12; Aluminum
  • M/S
    Ports V1 & V2 — SAE 16; Port T — SAE 12; Iron
Function
Function image

Technical specifications

  • Modifiers
    Ports
    • M, M/S
      Ports V1 & V2: SAE 16; Port T: SAE 12;
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    This assembly provides 2 functions. It provides cross-port relief protection between ports M1 and M2. It also provides anti-cavitation protection for ports M1 and M2.

    • Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
    • Will accept maximum pressure at port 2; suitable for use in cross port relief circuits.
    • Suitable for use in load holding applications.
    • This assembly provides protection for pumps and motors from pressure transients due to sudden load changes, especially variable displacement pumps, since the displacement mechanism is sometimes too slow to catch these pressure transients.
    • The assembly's direct acting relief valves exhibit rapid response characteristics that minimize pressure overshoot and also provide low reseat leakage (less than 5 drops/min (0,3 cc/min) @ 85% of cracking pressure).
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    • Body Type
      Motor mount
    • Interface
      Staffa B150/B200
    • Capacity
      50 gpm

    Model CAD Files

    Files not yet avialable. Click below to request them.

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    • Why doesn't Sun anodize their aluminum bodies?
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    • Direct acting or pilot operated - what do I use?
      • Back to Top
    • 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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