Hydac ST1 Series hydraulic Flow Divider/Combiner

The flow divider Hydac ST1 Series is a spool valve for pressure-independent flow rate distribution in fix ratio. In reverse direction the valve becomes a flow combiner. Various flow ranges with various translations are available.

Cavity ST12230-01 (metric): M 27 x 2. Qmax = 60 l/min Pmax = 350 bar\
Cavity ST10-01: UNF 7/8-14. Qmax = 45 l/min Pmax = 350 bar
Cavity ST16-01: UNF 1 5/16-12. Qmax = 150 l/min Pmax = 350 bar

Feature

  • Can be used for differential locks in drive applications
  • Excellent dividing and combining accuracy
  • Synchronizing flow in both operating modes
  • Wide flow range down to 25% of nominal flow rating
  • Compact design
  • Exposed surfaces zinc-nickel plated for increased corrosion protection (1.000 h Salt spray test)

Specification

Model ST10-01 ST16-01 ST12230-01
Operating Pressure max. 350 bar
Nominal Flow .max 45 l/min 150 l/min 60 l/min
Inlet flow 7.6 l/min max. 90 l/min 20 l/min (type 20)
15.2 l/min max. 115 l/min 60 l/min (type 60)
22.8 l/min max. 150 l/min
30.4 l/min
37.8 l/min
45.6 l/min
Dividing accuracy up to 10% of inlet flow per partial flow
Media operating temperature range min. -30 °C to max. +100 °C
Ambient temperature range min. -30 °C to max. +100 °C
Operating fluid Hydraulic oil to DIN 51524 Part 1, 2 and 3
Viscosity range min. 7.4 mm²/s to max. 420 mm²/s
Filtration Class 21/19/16 to ISO 4406 or cleaner
MTTFd 150 – 1200 years, according to DIN EN ISO 13849-1
Materials Valve body steel
Spool / Piston hardened and ground steel
Seals NBR (standard)
FKM (optional, media temperature range -20 °C to +120 °C)
Back-up rings PTFE
Cavity 12230 metric
Weight 0.122 kg 0.45 kg 0.27 kg

Function

  • ST10-01 and ST16-01 Type

Hydac ST10-01 Type Flow Divider Valve
ST10-01 Type

ST10-01 Type

Hydac ST16-01 Type Flow Divider Valve
ST16-01 Type

ST16-01 Type

The flow divider is a spring-loaded pressure compensated spool type valve. It divides a flow in two and keeps both flows constant. The division is made according to the specified ratio – from port 3 to ports 2 and 4.
As a flow combiner it combines two partial flows together – from ports 2 and 4 to port 3.
Port 1 is not used.

  • ST12230-01 Type

Hydac ST12230-01 Type Flow Divider Valve
ST12230-01

The flow divider is a spool type valve which divides a flow in two. The division is made according to the specified ratio – from port 2 to ports 1 and 3. As a flow combiner it combines two partial flows together – from ports 3 and 1 to port 2.

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