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

Cartridge Valve

Style

Counterbalance

Model Code Description

RS08-01-SS6-N-4-500V300

Size

08

Operating Pressure

350 bar5000 psi

Nominal Flow

10 gpm38 L/min

Pilot Ratio

4:1

Check Valve Cracking Pressure

1.0 bar14 psi

Fluid Operating Temperature Range

-20 to 120 ºC-4 to 248 ºF

Viscosity

7.4 to 420 cSt50 to 2000 SUS

Filtration

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

Installation

No Orientation Restrictions

Cavity

FC08-3

Cavity Rougher Tool

02580086

Cavity Finisher Tool

02580087

Cartridge Weight

0.266 kg0.58 lb

Cartridge Material

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)

FS083-N P/N: 03054795

Seal Kits (Viton®)

FS083-V P/N: 02591059

Seal Material

Buna-N

Body Material

Steel

Optional Setting

300 ÷ 10

Maximum Internal Leakage at 80% of Nominal Settings

5 drops/min0.25 cm³/min

Valve Model

RS08-01

Adjustment Options

Allen Head (HEX 5/32 in.)

Back-Up Ring Material

Polytetrafluoroethylene (PTFE)

Number of Ports/Ways

6

Ports

SAE

Medium

Mineral-Based Oils or Synthetics with Lubricating Properties

Operating Temperature [Max]

120 ºC248 ºF

Cracking Pressure

1 bar14.5 psi

Hex Size

1 in

Torque

18.5 to 22 N·m25 to 30 ft·lb

BUn

EA

Division

HYDRAULIC DIVISION

Product Group Family

CARTRIDGE VALVES-CHECK VALVES AND LOAD

Product

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