Electro-Proportional Valves — Flow Control

SP08-20 — Poppet-Type, 2-Way, Normally Closed
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  STP file for SP08-20.
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SP08-20 Valve

SYMBOL:
SP08-20 Valve symbol

 

DESCRIPTION
A solenoid-operated, 2-way, normally closed, proportional, poppet-type, screw-in
hydraulic cartridge valve for blocking or load-holding applications.

OPERATION
When de-energized, the SP08-20 acts as a check valve, allowing flow from 1 to 2,
while blocking flow from 2 to 1. When energized, the cartridge’s poppet lifts to open
the 2 to 1 flow path. Flow is proportional to current applied to the coil. Flow varies with
manual override.
Note: If low voltage is expected on the machine, 12 or 24 volt systems will require the
use of 10 volt or 20 volt coils respectively.
See “SP Valves and Coil Operating Parameters,” page 2.002.1_pdf.

FEATURES
• Continuous-duty rated coil.
• Efficient wet-armature construction.
• Manual override options.
• Optional waterproof E-Coils rated up to IP69K.
• Industry common cavity.
• Compact size.

RATINGS
Operating Pressure: 207 bar (3000 psi)
Flow: without manual override: up to 22 lpm (5.8 gpm) at 34.5 bar (500 psi);
   with manual override: up to 18.4 lpm (4.8 gpm) at 34.5 bar (500 psi)
Minimum Operating Dither/Pulse Frequency: 70 Hz
Hysteresis: less than 5% up to 85% of I-max; less than 10% above 85% of I-max
Internal Leakage: 5 drops/minute max. at 250 bar (3625 psi)
Temperature: -40° to 100°C (-40° to 212°F) with Buna seals;
   -26° to 204°C (-15° to 400°F) with fluorocarbon 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: VC08-2; See page 9.108.1_2w
Cavity Tool: CT08-2xx; See page 8.600.1
Seal Kit: SK08-2x-T; See page 8.650.1
Coil Nut: Part No. 7004400

RECOMMENDED ELECTRONIC CONTROLLERS
The EVDR Series controllers are recommended for use with most HydraForce
proportional valves. These newer electronic controllers are versatile, reliable,
and easily configured and customized for a wide range of applications.

See the EVDR Product Selection Guide.
For other Electronic Controllers, see page 2.001.1_pdf



 

 

PERFORMANCE:

SP08-20 Valve Performance Chart

 

SP08-20 Valve Performance Chart

DIMENSIONS:

SP08-20 Valve Dimensions

 

MATERIALS:

Cartridge: Weight: 0.09 kg (0.20 lb);
Steel with hardened work surfaces.
Zinc-plated exposed surfaces; Buna N
O-rings and back-ups standard.

Standard Ported Body: Weight: 0.16 kg
(0.35 lb); Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar (3000 psi); Ductile iron bodies available; dimensions may differ. See page 8.008.1_2w.

Standard D-Coil: Weight each: 0.11 kg
(0.25 lb); Unitized thermoplastic encapsulated, Class H high temperature magnetwire.
See page 3.200.1_08-size.

E-Coil: Weight: 0.14 kg (0.3 lb); Perfect wound, fully encapsulated with rugged external metal shell; Rated up to IP69K with integral connectors. See page 3.400.1_08-size.

 

ORDERING CHART:

SP08-20 Ordering Chart Manual Override Options