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
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

Unit 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:
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
ZL70-30DE-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