EN 5.941.1.1/09.20
1
2/2-Solenoid directional valve
Poppet type, pilot operated
Normally closed (reverse ow)
With electronic switch position
monitoring UNF Cartridge - 350 bar
WS16ZR-01E
up to 140 l/min
up to 350 bar
The directional valve is a pilot operated
poppet valve with electronic switch
position monitoring.
If the solenoid coil is de-energised the
valve is blocked from port 2 to port 1 –
this switch position is recorded
inductively. In the reverse direction there
is free ow through the valve. The valve
piston opens at a dierential pressure of
approx. 1.6 bar (check function).
When energised the valve allows ow in
both directions. The valve piston opens
at a pressure dierence of approx. 1.5
bar from 2 to 1 and at approx. 1.2 bar
from 1 to 2.
Please mind: In pilot operated solenoid
valves, shift performance and response
times depend i.a. very much on pressure
drop and volume ow during actuation.
This applies particularly to valves with
piston seals and/or position sensors.
FEATURES
z With electronic switch position monitoring
z Excellent switching performance by high power HYDAC solenoid
z Coil seals protect the solenoid system
z Wide variety of connectors available
z Exposed surfaces zinc-nickel plated for increased corrosion protection (1000 hr salt spray test)
FUNCTION
SPECIFICATIONS*
Operating pressure: max. 350 bar
Nominal ow: max. 140 l/min at 280 bar
max. 100 l/min at 350 bar
Leakage: max. 5 drops/min (0.25 cm³/min)
at p
2
= 350 bar and p
1
= 0 bar, ν = 33 mm
2
/s
Media operating temperature range: min. -20 °C to max. +100 °C
Ambient temperature range: min. -20 °C to max. + 60 °C
Operating uid: Hydraulic oil to DIN 51524 Part 1, 2 and 3
Viscosity range: min. 10 mm²/s to max. 420 mm²/s
Filtration of operating uid:
(acc. to ISO 4406)
p ≤ 210 bar: min. class 20/18/15
p ≥ 210 bar: min. class 18/16/13
MTTF
d
: 150–1200 years, according to DIN EN ISO 13849 - 1
Installation position: No orientation restrictions
Materials: Valve body: steel
Poppet: hardened and ground steel
Seals: NBR (standard)
FKM (optional, media operating
temperature range -20 °C to +120 °C)
Back-up rings: PTFE
Coil: Steel / polyamide
Cavity: FC16-2
Weight: 0.79 kg
Electrial data
Type of voltage: DC: direct current solenoid
AC: alternating current solenoid with rectier integrated
into the coil
Current draw at 20 °C: 1.5 A at 12 V DC
0.8 A at 24 V DC
Voltage tolerance: ± 15% of rated voltage
Coil duty rating: Continuous up to max. 115% of rated voltage at max. 60° C
ambient temperature
Response time:
(at p
max
, Q
max
, ν = 33 mm
2
/s)
Energised: approx. 50 ms; de-energised: approx. 70 ms
substantially extended response times
possible at other operating conditions
Coil type: Coil…-40-1836
Sensor data
Supply voltage: 24 V: 20 to 32 V DC
12 V: 10.5 to 16 V DC
Reverse polarity protection of supply: Yes
Outputs: 2 with change-over function, PNP, positive switching
Output load: ≤ 400 mA, 100% continuous
Short circuit protection: Resistant to short circuits
Connector: Round connector M12x1 (4-pole)
Protection class: IP65 to DIN40050
CE conformity: 93/68/EEC 2014/30/EU
EMC: DIN EN 61000-6-1-2-3-4
Humidity requirements: 0–95% rel. (as per DIN 40040)
Sensor connections:
* see “Conditions and Instructions for Valves” in brochure 53.000