ZL70-30 Proportional, Bi-Directional Flow Control,
SYMBOLS
2.602.1
DESCRIPTION
A solenoid-operated, electrically-variable, pressure-compensated, spool-type,
normally closed when de-energized, proportional, bi-directional, fl ow control valve.
An internal compensator spool provides compensated fl ow across the
proportional orifi ce regardless of fl ow direction.
OPERATION
The ZL70-30 provides regulated fl ow from port ➁ to port ➂, or regulated fl ow from
port
➂ to port ➁. Port ➀ should be blocked. Regulated fl ow is proportional to electric
current applied to the solenoid.
Operation of Manual Override:
To Engage: Turn clockwise approximately 1 turn to reach start point. Continue
another approximately 5 turns to full shift.
To Disengage: Turn counterclockwise approximately 6 turns until positive stop
is found.
FEATURES
• Excellent linearity and hysteresis characteristics.
• Hardened spool and cage for long life.
• Optional coil voltages and terminations.
• Effi cient wet armature construction.
• Manual Override option.
RATINGS
Maximum Operating Pressure: 240 bar (3500 psi)
Regulated Flow: Range A: 0–20 lpm (0–5.3 gpm); Range B: 0–10 lpm (0–2.6 gpm)
Internal Leakage: 0.38 lpm (0.10 gpm) maximum at zero current
Electrical: 2 standard voltage ratings
Temperature: -40 to 120°C with Buna N seals
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of
7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1.
Cavity: VC10-3; See page 9.110.1
Cavity Tool: CT10-3X-XX; See page 8.600.1
Seal Kit: SK10-3X-MM; See page 8.650.1
Threshold Current
250 ± 100 mA
125 ± 50 mA
Coil Voltage
12 VDC
24 VDC
Max. Control Current
1400 ± 100 mA
750 ± 50 mA
PERFORMANCE
U.S. Patent
6,167,906
2
3
1
ELECTRO-PROPORTIONAL VALVES—FLOW CONTROL
ABBREVIATED SYMBOL:
USASI/ISO:
2010
PERCENT OF MAX. CONTROL CURRENT
FLOW lpm/gpm
40 5030 60 70 80 90 100
22.7/6
18.9/5
15.1/4
11.4/3
7.6/2
3.8/1
FLOW RANGE “A”
Regulated Flow vs. Current
240 bar/3500 psi Inlet
207 bar/3000 psi at Regulated Port
➁ to ➂ ——— ➂ to ➁ – – – –
12V Coil; 110 Hz PWM
32 cSt/150 sus oil at 40°C
FLOW RANGE “A”
Regulated Flow vs. Pressure Drop
240 bar/3500 psi Inlet
➁ to ➂ ——— ➂ to ➁ – – – –
12V Coil; 110 Hz PWM
32 cSt/150 sus oil at 40°C
PRESSURE bar/psi
103
1500
172
2500
242
3500
35
500
FLOW lpm/gpm
22.7/6
18.9/5
15.1/4
11.4/3
7.6/2
3.8/1
1.4 amp
1.0 amp
0.7 amp
0.4 amp
HYDRAFORCE
.com
®
Recommended Electronic Controllers:
See page 2.001.1 or our Electronics catalog.
Blue rectangles are links to other catalog pages.
18.8
53.8
66.5
34.5
7.1
50.86.4
1.36
2.00
Plugged
0.25
2.62
2.12
0.74
0.28
2
3
1
1.13
28.6
FLATS
ACROSS
TORQUE:
27 ft-lbs
(36.7 Nm)
1
2
MANUAL
OVERRIDE
OPTION
3
1.74
44.1
1.25
31.8
1.25
31.8
2.50
63.5
3.42
86.8
INCH
MILLIMETRE
4.33
109.9
3.58
90.9
1.84
46.7
1.06
27.0
ACROSS FLATS
TORQUE:
10–12 ft-lbs
(14–16 Nm)
max.
Cartridge: Weight: 0.32 kg. (0.7 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Buna N O-rings and polyester
elastomer back-ups standard.
Standard Ported Body: Weight:
0.59 kg. (1.3 lbs.) Anodized high-
strength 6061 T6 aluminum alloy,
rated to 207 bar (3000 psi). Ductile
iron bodies available; dimensions
may differ. See page 8.010.1
70-Size “D” Coil: Weight: 0.32 kg.
(0.7 lbs.) Unitized thermoplastic
encapsulated, Class H high
temperature magnet-wire.
See page 3.200.7.
70-Size “E” Coil: Weight: 0.41 kg.
(0.9 lbs.) Fully encapsulated with
rugged external metal shell.
IP69K rated. See page 3.400.13.
MATERIALS TO ORDER
ZL70-30
2.602.2
ZL70-30 __ __ - __ __ __ - __ - __ __ __ __
Option(s)
None
(Blank)
Manual Override M
Voltage
0 Less Coil
12 12 VDC
24 24 VDC
Seals
N Buna N (Std.)
V Fluorocarbon
Normally Closed
Porting
Cartridge Only 0
SAE 6 6T
SAE 8 8T
SAE 10 10T
DIMENSIONS
U.S. Patent 6,167,906
Range
0–20 lpm A
(0–5.3 gpm)
0–10 lpm B
(0–2.6 gpm)
Coils with internal
diode are available.
Consult factory.
(continued)
PERFORMANCE
2010
PERCENT OF MAX. CONTROL CURRENT
FLOW lpm/gpm
40 5030 60 70 80 90 100
11.4/3.0
9.5/2.5
7.6/2.0
5.7/1.5
3.8/1.0
1.9/0.5
FLOW RANGE “B”
Regulated Flow vs. Current
240 bar/3500 psi Inlet
207 bar/3000 psi at Regulated Port
➁ to ➂ ——— ➂ to ➁ – – – –
12V Coil; 110 Hz PWM
32 cSt/150 sus oil at 40°C
FLOW RANGE “B”
Regulated Flow vs. Pressure Drop
240 bar/3500 psi Inlet
➁ to ➂ ——— ➂ to ➁ – – – –
12V Coil; 110 Hz PWM
32 cSt/150 sus oil at 40°C
PRESSURE bar/psi
103
1500
172
2500
242
3500
35
500
FLOW lpm/gpm
11.4/3.0
9.5/2.5
7.6/2.0
5.7/1.5
3.8/1.0
1.9/0.5
1.4 amp
1.0 amp
0.7 amp
0.4 amp
®
HYDRAFORCE
HYDRAFORCE
.com
®
Terminations D-Coil
DS Dual Spades
DG DIN 43650
DL Leadwires (2)
DL/W Leads w/Weatherpak
®
Connectors
Terminations E-Coil
IP69K Rated
ER Deutsch DT04-2P
EY Metri-Pack
®
150
Blue rectangles are links to other catalog pages.
