Brands we carry
Walvoil
SD·SDM·SDS directional control valves, 11 series — 25–240 L/min, up to 315 bar (verified against official catalogues)
Walvoil is an Italian manufacturer specializing in directional control valves. WOORI Enterprise supplies the SD/SDM series of monoblock and sectional directional control valves in manual, hydraulic-pilot, and electro-proportional actuation versions, and maintains the largest stock inventory among all brands we carry.
597 items with stock history in our ERP — send us a part number for instant stock & lead-time check.
Supply line-up
| Series | Description | Spec range |
|---|---|---|
| SD5 (monoblock) | Compact multi-section monoblock — 315 bar parallel/tandem, 250 bar series | 45 L/min · 315 bar · up to 7 sec |
| SD6 (sectional) | Compact stackable sections — 315 bar parallel/tandem, 210 bar series | 45 L/min · 315 bar · up to 12 sec |
| SD8 (sectional) | Mid-flow stackable sections | 90 L/min · 315 bar · up to 14 sec |
| SD11 (monoblock) | Mid-flow monoblock — 315 bar parallel, 250 bar series | 70 L/min · 315 bar · up to 6 sec |
| SD18 (monoblock) | High-flow monoblock | 160 L/min · 250 bar · up to 6 sec |
| SD25 (sectional) | High-flow — 315 bar parallel, 210 bar series | 240 L/min · 315 bar · up to 12 sec |
| SDM080 (monoblock) | Compact SDM line | 25 L/min · 315 bar · up to 6 sec |
| SDM100 (monoblock) | Spool-dependent flow (nominal 70) | 70 L/min · 315 bar · up to 8 sec |
| SDM110 (monoblock) | Mid SDM | 45 L/min · 315 bar · up to 6 sec |
| SDM140 (monoblock) | Large SDM | 80 L/min · 315 bar · up to 6 sec |
| SDS100 (electro-hydraulic) | On-off / proportional solenoid operation — electronics -25 to 60°C | 60 L/min · 315 bar · up to 12 sec |
Typical applications: Work-implement circuits on construction equipment · Hydraulic circuits on agricultural machinery · Multi-function control on special-purpose vehicles
Datasheet: SD5 (PDF) ↗Datasheet: SD6 (PDF) ↗Datasheet: SD8 (PDF) ↗Datasheet: SD11 (PDF) ↗Datasheet: SD18 (PDF) ↗Datasheet: SDM080 (PDF) ↗Datasheet: SDM100 (PDF) ↗Datasheet: SDM110 (PDF) ↗Datasheet: SDM140 (PDF) ↗
Frequently asked questions
How do I choose the number of spools and the actuation type?▾
Set the number of sections (spools) to match the number of actuated circuits, then choose between manual lever, hydraulic pilot, or electro-proportional actuation. Share your flow and pressure requirements and we will help configure the right SD/SDM setup.
Are items available from stock?▾
Walvoil is our largest stocked brand, with roughly 600 items in inventory. Stocked components ship immediately; special spools and custom configurations are quoted with separate lead times.
What is the difference between SD and SDM series?▾
Both are directional control valves. SD is the full monoblock/sectional line (45–240 L/min); SDM is a compact monoblock-focused line (25–80 L/min). We help you select by flow, number of sections and operation type (manual / pilot / electro-proportional).
Fluid and temperature conditions?▾
Mineral oil with NBR seals -20 to 80°C (FPM -20 to 100°C), recommended viscosity 15–75 mm²/s, cleanliness ISO 4406 19/16. For low-temperature or special fluids we confirm seal specification first.
Walvoil — quotation, stock & cross-reference
We reply promptly on business days.