The Olmsted SVX Series of 2-way servo controlled proportional throttling valves are designed specifically for hydraulic applications where very fine flow control and rapid dynamic response are critical to system performance. The SVX series valves are perfectly suited for high-speed hydraulic applications such as die casting shot control, injection molding and more.
Base Hydraulic Symbol
At A Glance
- Valves: Throttle Valve
Product Details
The SVX Series valves are a 2-stage cartridge valve design. The main stage features a unique metering sleeve, flow gate, and control spool. An internal LVDT provides position feedback of the control spool for closed-loop proportional control.
Pilot control for the main stage is provided by an NFPA servo valve. The standard offering includes a high-speed proportional servo-controlled DDV, which provides high pilot flow for excellent dynamic response.
Standard Features
- Standard cavity sizes NG40 through NG125
*Expanded range available on request - High-Speed DDV servo pilot valve as standard
- Industry-leading dynamic response for fast and accurate motion control
- Unique flow window design provides superior flow control over a broad range
- Designed for long life in the most demanding high-cycle applications
Technical Specifications
Hydraulic
| Nominal Size | 40 MM | 50 MM | 63 MM | 80 MM | 100 MM | 125 MM |
| Recommended Fluid Type | Water-Glycol, Mineral Oil | |||||
| Max Working Pressure (Inlet, Outlet) | 5000 psi [350 bar] | |||||
| Max Pilot Pressure (X/P) | 5000 psi [350 bar] | |||||
| Max Tank Pressure (Y/T) | 3600 psi [250 bar] | |||||
| Working Fluid Temperature | -4°F to 140°F [-20°C to 60°C] | |||||
| Recommended Viscosity | 100 to 400 SUS [20 to 90 cst] | |||||
| Required Filtration | NAS 1638 Class 7 [ISO 4406 18/16/13] | |||||
| Est. Flow @ ΔP = 145 psi [10 bar] | 375 gpm
[1420 lpm] |
574 gpm
[2174 lpm] |
914 gpm
[3460 lpm] |
1289 gpm
[4880 lpm] |
2344 gpm
[8872 lpm] |
3000 gpm
[11356 lpm] |
| Est. Cv | 32 | 49 | 78 | 110 | 200 | 256 |
| Leakage @ 1000 psi [70 bar]
Water Glycol @ 122°F [50°C] |
< 12 in3/m
[200 ml/m] |
< 20 in3/m
[330 ml/m] |
< 25 in3/m
[410 ml/m] |
< 40 in3/m
[655 ml/m] |
< 60 in3/m
[985 ml/m] |
< 60 in3/m
[985 ml/m] |
| Pilot Valve Size | NG6 [S6 Pro] | NG10 [S10 Pro] | ||||
| Rated Pilot Flow @ 1000 psi [70 bar] | 16 gpm [60 lpm] | 66 gpm [250 lpm] | ||||
Flow Characteristics
1. Estimate Flow data provided using water-glycol type fluid (sg=1.06). Flow is shown in the recommended side-to-bottom direction.
2. Position data excludes cusions at end of stroke.
Dynamic / Static Response1
| Nominal Size | 40 MM | 50 MM | 63 MM | 80 MM | 100 MM | 125 MM | |
| Estimate
Step Response, |
Pilot Pressure
1000 psi [69 bar] 2000 psi [138 bar] 3000 psi [207 bar] |
10 ms 8 ms 6 ms |
15 ms 11 ms 9 ms |
23 ms 17 ms 14 ms |
15 ms 11 ms 9 ms |
25 ms 18 ms 15 ms |
43 ms 31 ms 25 ms |
| Hysteresis | < 0.2 % | ||||||
3. Dynamic/Static response is given for the standard provided servo pilot valve. Performance may vary for other pilot valve options.
CAD FILES
DOCUMENTATION
Please contact Oilgear directly for more detailed information on this proprietary product.
