Electro-Proportional Valves — Flow Control

SP08-20A — Poppet-Type, 2-Way, Normally Closed
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SP08-20A Valve

SYMBOL:
SP08-20A Valve symbol

 

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

OPERATION
When de-energized, the SP08-20A acts as a check valve, allowing flow from 1 to 2, while blocking flow from 2 to 1. When energized, the 2 to 1 flow path is opened. 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 option.
• Optional waterproof E-Coils rated up to IP69K.
• Industry common cavity.
• Compact size.

RATINGS
Operating Pressure: 207 bar (3000 psi)
Flow: 30.3 lpm (8 gpm) nominal; see performance charts
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;
-54 to 107°C (-65°F to 225°F) with polyurethane 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:

SP08-20A Valve Performance Chart

 

SP08-20A Valve Performance Chart

DIMENSIONS:

SP08-20A Valve Dimensions

 

MATERIALS:

Cartridge: Weight: 0.10 kg (0.23 lb);
Steel with hardened work surfaces.
Zinc-plated exposed surfaces; Buna N
O-rings and polyester elastomer back-up 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 D-Coils E-Coils