Valves - Electro-proportional Controls - Flow Control - Pressure Compensated - Priority Type - Bidirectional - Normally Open

ZL70-30

N.C. BIDIRECTIONAL FLOW REGULATOR U.S. PATENT No. 6,167,906

Overview

Description

ZL70-30 is a solenoid operated, pressure compensated, spool type, normally closed, proportional bi-directional flow control valve

Operation

The valve provides regulated flow in both directions, from port 2 to port 3 or from port 3 to port 2. Port 1 should be blocked. Regulated flow is proportional to electric current applied to solenoid. The valve is intended for use in mineral based or synthetic fluids with lubricated properties. D:5.2 m:5.2 1.06 [26,9] across flats 1.13 [28,7] across flats 7/8-14 unf-2a thread do not use with e-coil outline aluminum body shown

Features

  • Choice of two regulated flow ranges.
  • Excellent linearity and hysteresis characteristics.
  • Hardened spool and cage for long life.
  • Optional coil voltages and terminations.
  • Efficient wet-armature construction.
  • Manual Override option.

Ratings

Pressure Ratings
Pressure rating
241 bar (3500 psi) Inlet (port 1)
207 bar (3000 psi) Regulated (port 3)
207 bar (3000 psi) Bypass (port 2)
Proof pressure
689 bar (10000 psi)
Burst pressure
1103 bar (16000 psi)
Flow Ratings
Flow rating
0 to 20.1 lpm (0 to 5.3 gpm) Flow range A
0 to 9.8 lpm (0 to 2.6 gpm) Flow range b
Maximum internal leakage
0.38 lpm (0.1 gpm) Max at 0 current
Hysteresis flow
lpm (gpm) Maximum
Temperature Ratings
Maximum operating fluid temperature
-40 to 100 °C (-40 to 212 °F) With buna N seals
-26 to 204 °C (-15 to 400 °F) With fluorocarbon seals
Storage temperature
-40 to 70 °C (-40 to 160 °F)
Ambient temperature
-40 to 70 °C (-40 to 160 °F)

Operating Parameters

Fluids
Mineral based or synthetic hydraulic fluid with lubricating properties
Fluid viscosity range
7.4 to 420 cSt
Maximum operating contamination level
18/16/13 per ISO 4406

Properties

Cartridge weight
0.32 kg (0.70 lb) ZL70-30X
0.37 kg (0.81 lb) ZL70-30XM
0.45 kg (1.00 lb) ZL70-30XG
Internal wetted surface area
209.6 cm² (32.5 in²) Zl7030x
212.8 cm² (33.0 in²) Zl7030xm zl7030xg

Electrical Parameters

Note
(with size 70 e-series and d-series coil)
Maximum control current
1400 mA 12 V coil
700 mA 12 V coil
Threshold current
250 mA 12 V coil
125 mA 12 V coil
Valve inductance
240 mH E-coil 12 V
700 mH E-coil 24 V
200 mH D-coil 12 V
600 mH D-coil 24 V
Dither PWM frequency
100 to 250 Hz
Dither PWM frequency
100 to 250 Hz
Dither PWM frequency
100 to 250 Hz

Performance

ZL70-30_Perf_Chrt

Dimensions

ZL70-30_Dim_Dwg

Materials

Materials

Cartridge: Weight: 0.32 kg (0.7 lb); 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 lb); Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar (3000 psi); Ductile iron bodies available; dimensions may differ.

70-Size D-Coil: Weight each: 0.32 kg (0.7 lb); Unitized thermoplastic encapsulated, Class H high temperature magnet wire.

70-Size E-Coil: Weight each: 0.41 kg (0.9 lb); Fully encapsulated with rugged external metal shell. IP69K rated.

Installation Specifications

Cavity
VC10-3
Cartridge installation torque
34 to 37 N-m (25 to 27 ft-lb)
Coil nut torque
14 to 16 N-m (10 to 12 ft-lb)
Cover cap torque
7 to 9 N-m (5 to 7 ft-lb)
Orientation restriction
None

Accessories

Order code

POSITION
CODE
DESCRIPTION
ZL70-30E-H-J-L
D
Flow Range
D
A
0 to 21.1 lpm (0 to 5.3 gpm) Flow Range
D
B
0 to 9.8 lpm (0 to 2.6 gpm) Flow Range
E
Manual Override
E
BLANK
NONE
E
G
Variable Position Override, Red Knurled Knob with Cover Cap
E
M
Variable Position Override, Red Knurled Knob
H
Line Body
H
0
No Body
H
6T
Aluminum SAE 6
H
8T
Aluminum SAE 8
H
6TD
Ductile Iron SAE 6
H
8TD
Ductile Iron SAE 8
H
3B
Aluminum BSPP 3/8" (3)
H
3BD
Ductile Iron BSPP 3/8" (3)
J
Seal
J
N
Buna-N
J
V
Fluorocarbon
J
P
Polyurethane
J
U
PPDI Urethane
L
Coil
L
0
No Coil
L
12DG
12 VDC, D-Coil, DIN 43650
L
12DL
12 VDC, D-Coil, Dual Lead Wires
L
12DL/W
12 VDC, D-Coil, Dual Lead Wires with Weatherpak
L
12DS
12 VDC, D-Coil, Dual Spade
L
12ER
12 VDC, E-Coil, Deutsch
L
12EY
12 VDC, E-Coil, Metri-Pack 150
L
24DG
24 VDC, D-Coil, DIN 43650
L
24DL
24 VDC, D-Coil, Dual Lead Wires
L
24DS
24 VDC, D-Coil, Dual Spade
L
24ER
24 VDC, E-Coil, Deutsch
ZL70-30_Order