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Relief

Model

YFRCLANAL

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
  • 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
  • F
    75 - 6000 psi (5 - 420 bar), 1000 psi (70 bar) Standard Setting
  • 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
  • I
    15 - 1500 psi (1 - 105 bar), 1000 psi (70 bar) Standard Setting
  • J
    25 - 1500 psi (1,7 - 105 bar), 1000 psi (70 bar) Standard Setting
  • K
    75 - 1500 psi (5 - 105 bar), 1000 psi (70 bar) Standard Setting
  • L
    15 - 800 psi (1 - 55 bar), 400 psi (28 bar) Standard Setting
  • M
    40 - 800 psi (2,8 - 55 bar), 400 psi (28 bar) Standard Setting
  • O
    15 - 400 psi (1 - 28 bar), 200 psi (14 bar) Standard Setting
  • P
    40 - 400 psi (2,8 - 28 bar), 200 psi (14 bar) Standard Setting
  • R
    15 - 200 psi (1 - 14 bar), 100 psi (7 bar) Standard Setting
  • S
    25 - 200 psi (1,7 - 14 bar), 100 psi (7 bar) Standard Setting
  • T
    40 - 200 psi (2,8 - 14 bar), 100 psi (7 bar) Standard Setting
  • U
    60 - 200 psi (4 - 14 bar), 100 psi (7 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 RPGC primary cartridge, Pilot-operated, balanced piston relief valve)
  • A
    A (with RPGC8 primary cartridge, Pilot-operated, balanced piston relief main stage with integral T-8A control cavity)
  • A
    A (with RPGC3 primary cartridge, Non-adjustable pilot-operated, balanced piston relief valve)
Port and Material Designation
  • Standard Options
  • D
    Ports P, S, T2 — 3/4" NPTF; Port T1 — 1/2" NPTF; Gage Port — 1/4" NPTF; Tank Port — 3/4" NPTF; Aluminum
  • D/S
    Ports P, S, T2 — 3/4" NPTF; Port T1 — 1/2" NPTF; Gage Port — 1/4" NPTF; Tank Port — 3/4" NPTF; Iron
  • L
    Ports P, S, T2 — SAE 12; Port T1 — SAE 8; Gage Port — 1/4" NPTF; Tank Port — 3/4" NPTF; Aluminum
  • L/S
    Ports P, S, T2 — SAE 12; Port T1 — SAE 8; Gage Port — 1/4" NPTF; Tank Port — 3/4" NPTF; Iron
  • W
    Ports P, S, T2 — 3/4" BSPP; Port T1 — 1/2" BSPP; Gage Port — 1/4" BSPP; Tank Port — 3/4" NPTF; Aluminum
  • W/S
    Ports P, S, T2 — 3/4" BSPP; Port T1 — 1/2" BSPP; Gage Port — 1/4" BSPP; Tank Port — 3/4" NPTF; Iron

Model: YFRC

Relief valve assembly with reverse flow check and start-up valve

Capacity:

Model

YFRCLANAL

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
  • 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
  • F
    75 - 6000 psi (5 - 420 bar), 1000 psi (70 bar) Standard Setting
  • 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
  • I
    15 - 1500 psi (1 - 105 bar), 1000 psi (70 bar) Standard Setting
  • J
    25 - 1500 psi (1,7 - 105 bar), 1000 psi (70 bar) Standard Setting
  • K
    75 - 1500 psi (5 - 105 bar), 1000 psi (70 bar) Standard Setting
  • L
    15 - 800 psi (1 - 55 bar), 400 psi (28 bar) Standard Setting
  • M
    40 - 800 psi (2,8 - 55 bar), 400 psi (28 bar) Standard Setting
  • O
    15 - 400 psi (1 - 28 bar), 200 psi (14 bar) Standard Setting
  • P
    40 - 400 psi (2,8 - 28 bar), 200 psi (14 bar) Standard Setting
  • R
    15 - 200 psi (1 - 14 bar), 100 psi (7 bar) Standard Setting
  • S
    25 - 200 psi (1,7 - 14 bar), 100 psi (7 bar) Standard Setting
  • T
    40 - 200 psi (2,8 - 14 bar), 100 psi (7 bar) Standard Setting
  • U
    60 - 200 psi (4 - 14 bar), 100 psi (7 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 RPGC primary cartridge, Pilot-operated, balanced piston relief valve)
  • A
    A (with RPGC8 primary cartridge, Pilot-operated, balanced piston relief main stage with integral T-8A control cavity)
  • A
    A (with RPGC3 primary cartridge, Non-adjustable pilot-operated, balanced piston relief valve)
Port and Material Designation
  • Standard Options
  • D
    Ports P, S, T2 — 3/4" NPTF; Port T1 — 1/2" NPTF; Gage Port — 1/4" NPTF; Tank Port — 3/4" NPTF; Aluminum
  • D/S
    Ports P, S, T2 — 3/4" NPTF; Port T1 — 1/2" NPTF; Gage Port — 1/4" NPTF; Tank Port — 3/4" NPTF; Iron
  • L
    Ports P, S, T2 — SAE 12; Port T1 — SAE 8; Gage Port — 1/4" NPTF; Tank Port — 3/4" NPTF; Aluminum
  • L/S
    Ports P, S, T2 — SAE 12; Port T1 — SAE 8; Gage Port — 1/4" NPTF; Tank Port — 3/4" NPTF; Iron
  • W
    Ports P, S, T2 — 3/4" BSPP; Port T1 — 1/2" BSPP; Gage Port — 1/4" BSPP; Tank Port — 3/4" NPTF; Aluminum
  • W/S
    Ports P, S, T2 — 3/4" BSPP; Port T1 — 1/2" BSPP; Gage Port — 1/4" BSPP; Tank Port — 3/4" NPTF; Iron
Function
Function image

Technical specifications

  • Modifiers
    Ports
    • D, D/S
      Ports P, S, T2: 3/4" NPTF; Port T1: 1/2" NPTF; Gage Port: 1/4" NPTF; Tank Port: 3/4" NPTF;
    • L, L/S
      Ports P, S, T2: SAE 12; Port T1: SAE 8; Gage Port: 1/4" NPTF; Tank Port: 3/4" NPTF;
    • W, W/S
      Ports P, S, T2: 3/4" BSPP; Port T1: 1/2" BSPP; Gage Port: 1/4" BSPP; Tank Port: 3/4" NPTF;
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    This assembly consists of a 30 PSI check and a pilot-operated, balanced-piston relief cartridge which is a normally closed pressure regulating valve. When the pressure at the inlet (P port) reaches the valve setting, the valve starts to open to tank (T port), 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 also incorporates an air-bleed and start-up cartridge which is used to purge air trapped in the system to help reduce power requirements and facilitate pump priming during the start-up of blocked center circuits.

    • Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
    • Air-bleed and start-up valves require a minimum of 4 gpm (15 L/min.) flow rate and 80 psi (5,5 bar) system pressure.
    • The air-bleed and start-up valve will re-open when system pressure falls below 25 psi (1,7 bar)
    • After air has been purged, closing times vary from approximately 12 seconds at 4 gpm (15 L/min.) to 0.5 seconds at 50 gpm 200 L/min.).
    • Suitable for use in load holding applications.
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    • Body Type
      Line mount
    • Capacity
      40 gpm
    • Check Cracking Pressure
      30 psi
    • Mounting Hole Diameter
      .41 in.
    • Mounting Hole C'bore Diameter
      .59 in.
    • Mounting Hole C'bore Depth
      .31 in.
    • Mounting Hole Quantity
      2

    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?
      • 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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