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RBAR

Relief valve from Sun Hydraulics

Description

Two-port, pilot-stage, air-controlled, direct-acting relief cartridges are normally closed pressure regulating valves. When the pressure at port 1 (inlet) is sufficient to overcome the force due to the air signal, a flow path is opened from port 1 to port 2 (tank). These cartridges are designed for pilot flow applications and utilize Sun’s T-8A cavity so they can be used in conjunction with Sun’s pilot-operated, main-stage valves.

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  • Utilizes the Sun T-8A 2-port cavity making it the ideal choice to use in conjunction with Sun’s main stage pilot or vent-to-operate cartridges. Separate pilot lines are eliminated and only one cavity needs to be machined to accommodate both the control and primary function. Note: All 2-position, 2-way pilot stage control cartridges utilize the same cavity and are physically interchangeable. Functionality is the only consideration.
  • Note: The main stage valve should first be installed to the correct torque value followed by the T-8A pilot control section into the main stage valve to its required torque value.
  • Different pilot control port options are available. See Option Selection for details.
  • Ports 1 and 2 may be pressured to 5000 psi (350 bar).
  • Hardened poppet and seat provide consistent operation, low leakage rates and superior wear characteristics.
  • Two different oil-to-air pilot ratios are available; 50:1 and 75:1. See Option Selection.
  • Maximum pilot control port pressure is 150 psi (10 bar).
  • Backpressure at port 2 increases the relief setting by a .43 multiplier.
  • 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-8A
Series P
Capacity 2.5 gpm
Capacity (metric) 10 L/min.
Maximum Operating Pressure 5000 psi
Maximum Operating Pressure (metric) 350 bar
Maximum Valve Leakage at 110 SUS (24 cSt) 15 drops/min.
Maximum Valve Leakage at 110 SUS (24 cSt) (metric) 1 cc/min.
Maximum Pilot Pressure 150 psi
Maximum Pilot Pressure (metric) 10,5 bar
Pilot Control Port See Control Options
Valve Installation Torque 20 – 25 lbf ft
Valve Installation Torque (metric) 27 – 33 Nm
Seal kit – Cartridge Viton: 990608006

Configuration Options

Control

A External 1/8 NPTF Port
B External 4-SAE Port
D External 1/8 BSPP Port

Air Pilot Ratio

W 50:1
Y 75:1

Seal Material

N Buna-N
V Viton
E EPDM
Cavity: T-8A
Nominal Capacity: 2,5 gpm (10 lpm)
Downloads
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Possible variants

RBARAWE, RBAR-AWE, RBARAWN, RBAR-AWN, RBARAWV, RBAR-AWV, RBARAYE, RBAR-AYE, RBARAYN, RBAR-AYN, RBARAYV, RBAR-AYV, RBARBWE, RBAR-BWE, RBARBWN, RBAR-BWN, RBARBWV, RBAR-BWV, RBARBYE, RBAR-BYE, RBARBYN, RBAR-BYN, RBARBYV, RBAR-BYV, RBARDWE, RBAR-DWE, RBARDWN, RBAR-DWN, RBARDWV, RBAR-DWV, RBARDYE, RBAR-DYE, RBARDYN, RBAR-DYN, RBARDYV, RBAR-DYV

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