Electro-Proportional Valves — Flow Control

SP08–21 — Poppet-Type, 2-Way, Normally Open
  Selection guide - similar valves.
  PDF file of this page.
  STP file for SP08-21.
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SP08-21 Valve

SYMBOL:
SP08-21 Valve symbol

 

DESCRIPTION
A solenoid-operated, 2-way, normally open, poppet-type, proportional, screw-in
hydraulic cartridge valve for low-leakage load-holding applications, and for starting
or stopping a load or a pump system.

OPERATION
When de-energized, the SP08-21 allows flow from 2 to 1. When the valve is partially
energized, the valve begins to throttle the flow from 2 to 1. When fully energized, the
poppet closes on the seat, blocking flow from 2 to 1. Flow from 1 to 2 will occur when
hydraulic pressure exceeds the solenoid force.
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.
• Optional waterproof E-Coils rated up to IP69K.
• Industry common cavity.
• Compact size.

RATINGS
Operating Pressure: 207 bar (3000 psi)
Flow: Up to 22.7 lpm (6 gpm)
Internal Leakage: 5 drops/minute max. at 207 bar (3000 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 104°C (-65° 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:

SP08-21 Performance charts

DIMENSIONS:

SP08-21 Valve Dimensions

 

 

MATERIALS:

Cartridge: Weight: 0.11 kg (0.25 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 lbs); 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:

SP08-21 Ordering Chart