Hydac ST1 Series Hydraulic Flow Divider/Combiner

The flow divider 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 15.2 l/min 22.8 l/min 30.4 l/min 37.8 l/min 45.6 l/min	max. 90 l/min max. 115 l/min max. 150 l/min	20 l/min (type 20) 60 l/min (type 60)
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

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

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.

Download Datasheet:

• Hydac ST10-01 Type Flow Divder Valve
• Hydac ST16-01 Type Flow Divder Valve
• Hydac ST12230 Type Flow Divder Valve