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A screw-in cartridge, 3-port, externally piloted counterbalance valve for precise control of overrunning loads, with load holding capabilities, thermal relief protection and free reverse flow check features.
Unit of Measure

Specifications

Type

 N/A Cartridge Valve

Style

 N/A Counterbalance

Model Code Description

 N/A RS08-01-AS6-N-4-500K

Size

 N/A 08

Operating Pressure

 N/A 350 bar5000 psi

Nominal Flow

 N/A 10 gpm38 L/min

Pilot Ratio

 N/A 4:1

Check Valve Cracking Pressure

 N/A 1.0 bar14 psi

Fluid Operating Temperature Range

 N/A -20 to 120 ºC-4 to 248 ºF

Viscosity

 N/A 7.4 to 420 cSt50 to 2000 SUS

Filtration

 N/A 21/19/16 or cleaner (per ISO 4406). Use with filter rated ß10 ≥ 200.

Installation

 N/A No Orientation Restrictions

Cavity

 N/A FC08-3

Cavity Rougher Tool

 N/A 02580086

Cavity Finisher Tool

 N/A 02580087

Cartridge Weight

 N/A 0.266 kg0.58 lb

Cartridge Material

 N/A Steel with hardened work surfaces. Zinc-plated exposed surfaces. Anodized aluminum knobs. Buna N or Viton® o-rings, and PTFE back-up rings.

Seal Kits (Buna-N)

 N/A FS083-N P/N: 03054795

Seal Kits (Viton®)

 N/A FS083-V P/N: 02591059

Seal Material

 N/A Buna-N

Body Material

 N/A Aluminum

Optional Setting

 N/A Set at Minimum Pressure for the Range

Maximum Internal Leakage at 80% of Nominal Settings

 N/A 5 drops/min0.25 cm³/min

Valve Model

 N/A RS08-01

Adjustment Options

 N/A Allen Head (HEX 5/32 in.) without Cover Cap

Back-Up Ring Material

 N/A Polytetrafluoroethylene (PTFE)

Number of Ports/Ways

 N/A 6

Ports

 N/A SAE

Medium

 N/A Mineral-Based Oils or Synthetics with Lubricating Properties

Operating Temperature [Max]

 N/A 120 ºC248 ºF

Cracking Pressure

 N/A 1 bar14.5 psi

Hex Size

 N/A 1 in

Torque

 N/A 18.5 to 22 N·m25 to 30 ft·lb

BUn

 N/A EA

Division

 N/A HYDRAULIC DIVISION

Product Group Family

 N/A CARTRIDGE VALVES-CHECK VALVES AND LOAD

Product

 N/A CARTRIDGE VALVES

Standard Line Bodies

N/A

  • Code: FH083-AS6
  • Part No: 03011424
  • Material: Aluminum, anodized
  • Pressure Rating: 3500 psi (245 bar)
  • Weight: 0.58 lb (0.26 kg)
  • Code: FH083-SS6
  • Part No: 00560920
  • Material: Steel, Zinc plated
  • Pressure Rating: 6000 psi (420 bar)
  • Weight: 1.70 lb (0.77 kg)

Operation

N/A The RS08 allows free flow from port 2 (inlet) to port 1 (load). Flow from port 1 to port 2 is blocked until either the pressure setting has been reached or sufficient pilot pressure has been applied to port 3 (pilot). The RS08 has optional 3:1 and 4:1 pilot ratios. It will open when pilot pressure = 1/3 (or 1/4) of the difference between the set pressure and the load pressure.

Features

N/A

  • Excellent stability through entire flow range
  • Adjustable across specified pressure range
  • Positive stop prevents spring from over adjustment (options V, H)
  • Stroke limiting device for enhanced safety
  • Internal seals to minimize leakage
  • Same cavity as the RP08A-01 P.O. Check valve
  • Hardened poppet and seat to ensure extended service life and low leakage
  • All external surfaces zinc-plated
  • Industry common cavity

Note

N/A Subject to technical modifications

Rotating adjustment screw clockwise increases the pressure setting