HYDAC INTERNATIONAL GmbH
HYDAC INTERNATIONAL GmbH
66280 Sulzbach/Saar
Germany
Phone: +49 (0) 68 97 509-01
Email: info@hydac.com
Website: www.hydac.com
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RS 220 is a sectional open center valve designed for max. operating pressures up to 4,350 psi (300 bar) and max. pump flows up to 30 gpm (110 Lpm).

It is available with 1 to 10 working sections per valve assembly.

RS 220 is designed with an open center for fixed pumps and a restricted open center for variable displacement pumps.

It is available with electro-hydraulic or hydraulic proportional remote control, but the valve can also be manually operated.
Unit of Measure

Specifications

Brands

 N/A HYDAC

Pressures/Flows

Maximum Operating Pressure per Port (P1, A, B)

 N/A 4,350 psi300 bar

Maximum Operating Pressure per Port (T1, T2, T3, T4)

 N/A 300 psi20 bar

Typical Nominal Inlet Flow Rate

 N/A 30 gpm110 L/min

Fluid Temperature

 N/A 5 to 176 ºF-15 to 80 ºC

Technical Data

Spool Control Force at Neutral Position

 N/A 25 lb110 N

Spool Control Force at Maximum Spool Stroke

 N/A 29 lb130 N

Permissible Contamination Level

 N/A Equal or Better than 20/18/14 as per ISO 4406
Viscosity1 N/A 10 to 400 mm²/s
Leakage2 N/A ≤ 13 cm³/min

Pressure Fluid

 N/A Mineral Oil and Synthetic Oil Based on Mineral Oil HL, HLP according to DIN 51524

Q-Function

Q-Function

 N/A The flow control (Q-function) of the inlet section by-passes the major part of the pump flow to tank when the system is idling, still giving access to full pump flow when the services are operated. Besides greatly reducing heat generation this also provides improved operating characteristics.

Remote Control

Remote Control

 N/A The RS 220 is designed with an integrated pilot supply system in order to achieve an easy installation and a reliable remote control function. It is also possible (and in some cases preferred) to supply the pilot system externally.

Properties and Possibilities

Properties and Possibilities

 N/A
  • A wide choice of spools and spool controls for different flow combinations and for several applications and systems.
  • A full range of service port valves.
  • Possibility of high pressure carry-over.
  • Electrical unloading for inlet safety function.
  • Manual versions easily convertible to remote control.

Features

N/A The electro-hydraulic proportional version in particular offers compact design with internal pilot oil supply, solenoids integrated in the valve body and integral hand levers for manual override/manual operation.

RS 220 can be fully adapted for marine applications.

The valve offers excellent operating characteristics because of the specially designed spools for different applications.

Low and uniform spool forces are the result of careful balancing of the flow forces.

Applications

Applications

 N/A The RS 220 is ideal for applications where you need excellent control characteristics such as cranes, sky-lifts, excavators, telescopic load handlers, skid-loaders, wheel loaders etc.

Note

N/A Higher values are possible, depending on application.

  • 1 Higher viscosity allowed at start up.
  • 2 A, B → T at 1,500 psi, 32 cSt and 104 ºF (100 bar, 32 cSt and 40 ºC)