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RVIT

Relief valve from Sun Hydraulics

Description

Ventable, pilot-operated, anti shock relief cartridges limit maximum system pressure and also limit the rate of pressure rise. The valve opens and then ramps closed at a constant speed, independent of settings and flows. These 3 port valves include a vent port (port 3) that connects between the main piston and the pilot stage to provide for remote control by other pilot or 2-way valves. The adjust screw determines the maximum (relief) setting and the minimum (threshold) setting.

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  • Because the modulating occurs inside the cartridge, these valves are immune to most of the problems associated with cavitation, namely noise and manifold erosion.
  • Will accept maximum pressure at port 2; suitable for use in cross port relief circuits.
  • A remote pilot relief on port 3 (vent) will control the valve below its own setting.
  • Not suitable for use in load holding applications.
  • When pressure at the inlet (port 1) exceeds the threshold setting, the valve opens to tank (port 2). The pilot section moves forward at a steady rate, increasing the setting by compressing the pilot spring. Maximum setting is achieved when the pilot section reaches a mechanical stop.
  • Valve provides protection for hydrostatic drives by reducing the jerk caused by sudden reversals. The valve is suitable for cross-port applications.
  • When used with a switching device, the valve can provide the ramp characteristic typically provided by proportional valves.
  • Small power units can be started against an anti shock relief to provide longer pump life.
  • Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
  • The main stage orifice is protected against contamination.
  • 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-19A
Series 4
Capacity 120 gpm
Capacity (metric) 480 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.
Control Pilot Flow 15 – 20 in³/min.
Control Pilot Flow (metric) 0,25 – 0,33 L/min.
Pressure Ramp Up Time 400 – 850 ms
Response Time – Typical 2 ms
Adjustment – No. of CW Turns from Min. to Max. setting 5
Valve Hex Size 1 5/8 in.
Valve Hex Size (metric) 41,3 mm
Valve Installation Torque 350 – 375 lbf ft
Valve Installation Torque (metric) 474 – 508 Nm
Adjustment Screw Internal Hex Size 5/32 in.
Adjustment Screw Internal Hex Size (metric) 4 mm
Locknut Hex Size 9/16 in.
Locknut Hex Size (metric) 15 mm
Locknut Torque 80 – 90 lbf in.
Locknut Torque (metric) 9 – 10 Nm
Model Weight 3.52 lb.
Model Weight (metric) 1.60 kg.
Seal kit – Cartridge Viton: 990219006

Configuration Options

Control

C Tamper Resistant – Factory Set
K Handknob
L Standard Screw Adjustment

Adjustment Range

A 500 – 3000 psi (35 – 210 bar), 1000 psi (70 bar) Standard Setting
C 1000 – 6000 psi (70 – 420 bar), 1000 psi (70 bar) Standard Setting
W 1000 – 4500 psi (70 – 315 bar), 1000 psi (70 bar) Standard Setting

Seal Material

N Buna-N
V Viton

Material/Coating

/AP Stainless Steel, Passivated
Cavity: T-19A
Nominal Capacity: 120 gpm (480 lpm )
Downloads
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Possible variants

RVITCAN, RVIT-CAN, RVITCAN/AP, RVIT-CAN/AP, RVITCAV, RVIT-CAV, RVITCAV/AP, RVIT-CAV/AP, RVITCCN, RVIT-CCN, RVITCCN/AP, RVIT-CCN/AP, RVITCCV, RVIT-CCV, RVITCCV/AP, RVIT-CCV/AP, RVITCWN, RVIT-CWN, RVITCWN/AP, RVIT-CWN/AP, RVITCWV, RVIT-CWV, RVITCWV/AP, RVIT-CWV/AP, RVITKAN, RVIT-KAN, RVITKAV, RVIT-KAV, RVITKCN, RVIT-KCN, RVITKCV, RVIT-KCV, RVITKWN, RVIT-KWN, RVITKWV, RVIT-KWV, RVITLAN, RVIT-LAN, RVITLAN/AP, RVIT-LAN/AP, RVITLAV, RVIT-LAV, RVITLAV/AP, RVIT-LAV/AP, RVITLCN, RVIT-LCN, RVITLCN/AP, RVIT-LCN/AP, RVITLCV, RVIT-LCV, RVITLCV/AP, RVIT-LCV/AP, RVITLWN, RVIT-LWN, RVITLWN/AP, RVIT-LWN/AP, RVITLWV, RVIT-LWV, RVITLWV/AP, RVIT-LWV/AP

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