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Relief valve from Sun Hydraulics

Description

The bi-directional, direct-acting relief cartridge is a normally closed, pressure-limiting valve used to protect hydraulic components from pressure transients. When the pressure differential between ports 1 and 2 exceeds the valve setting, the valve starts to open, throttling flow to limit the pressure rise, regardless of the direction.

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  • Capacity from port 1 to port 2 is 25 GPM (95 L/min). Flow from port 2 to port 1 is rated at 10 GPM (40 L/min).
  • Recommended minimum setting is 1200 psi (85 bar). Note: At settings below 1200 psi (85 bar), the valve is rated for maximum transient flows of 25 GPM (95 L/min) only.
  • Because the modulating occurs inside the cartridge, these valves are immune to most of the problems associated with cavitation, namely noise and manifold erosion.
  • The seals on the adjust screw are exposed to system pressure which means this valve can only be adjusted when the pressure is removed. The setting procedure is; check the setting, remove the pressure, adjust the valve, check the new setting.
  • Valve is relatively insensitive to varying oil temperatures and oil borne contamination.
  • Select a spring range where the desired relief setting is approximately mid-range to high between the minimum and maximum pressure to ensure maximum valve repeatability.
  • 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.

Technical Data

Note: Data may vary by configuration. See CONFIGURATION section.

Cavity T-10A
Series 1
Capacity 25 gpm
Capacity (metric) 95 L/min.
Maximum Operating Pressure 5000 psi
Maximum Operating Pressure (metric) 350 bar
Factory Pressure Settings Established at 4 gpm
Factory Pressure Settings Established at (metric) 15 L/min.
Maximum Valve Leakage at Reseat 10 drops/min.
Maximum Valve Leakage at Reseat (metric) 0,7 cc/min.
Response Time – Typical 2 ms
Reseat >85% of setting
Hysteresis ≤ 3 %
Adjustment – No. of CW Turns from Min. to Max. setting 5
Valve Hex Size 7/8 in.
Valve Hex Size (metric) 22,2 mm
Valve Installation Torque 30 – 35 lbf ft
Valve Installation Torque (metric) 41 – 47 Nm
Model Weight 0.37 lb.
Model Weight (metric) 0.17 kg.
U.S. Patent # 11,384,857
Seal kit – Cartridge Viton: 990310006

Configuration Options

Control

C Tamper Resistant – Factory Set
L Standard Screw Adjustment

Adjustment Range

A 1200 – 3000 psi (85-210 bar), 1500 psi (105 bar) Standard Setting
W 3000 – 5000 psi (210 – 350 bar), 4000 psi (280 bar) Standard Setting

Seal Material

N Buna-N
V Viton
Cavity: T-10A
Nominal Capacity: 25 gpm (95 lpm )
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Possible variants

Hydnet
EA Rosengrens gata 29
421 32 Västra Frölunda

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