Cartridge Valves - Directional Control Valves - Logic elements

VRLA-16A-S

RE18321-88-01(2023-11-07)
Description

The valve delivers priority flow, from 0 to max. available, on demand to port 4, while compensating for load changes downstream. In neutral, all input flow at 3 is given to the priority port 4. Pressure at 4 is applied to the spool against a spring force so that increasing pressure causes increasing by-pass of input flow to port 2. Load sense pressure at port 1, obtained between the downstream control and the load, assists the spring, and moves the spool back toward supplying priority flow. Comparison between priority outlet and LS pressure seeks a constant differential pressure over the control valve. As load and flow control change, the priority flow is increased or decreased to satisfy the demand establishing that differential.

¹) Only external seals for 10 valves

General:
Max. operating pressure:
  • 350 bar (5000 psi)
Max. inlet flow:
  • 160 l/min. (42 gpm)
Max. priority flow:
  • 140 l/min. (37 gpm)
Fluid temperature range:
  • -30 to 100 °C (-22 to 212 °F)
Installation torque:
  • 108- 122 Nm (80 - 90 ft-lbs)
Weight:
  • 0.5 kg (1.1 lbs)
Cavity:
  • CA-16A-4N (see data sheet 18325-70)
Lines bodies and standard assemblies:
  • Please refer to section “Hydraulic integrated circuit” or consult factory
Seal kit¹):
  • Code: RG16A4010530100
  • material no: R930000973
Fluids:
  • Mineral-based or synthetics with lubricating properties at viscosities of 10 to 500 mm²/s (cSt)
Recommended degree of fluid contamination:
  • Nominal value max. 10µm (NAS 8) / ISO 4406 19/17/14
Installation:
  • No restrictions
Other Technical Data:
  • See data sheet 18350-50
RE18321-88-02(2023-11-07)
RE18321-88-order(2023-11-07)
RE18321-88-dim(2023-11-07)