SVX Series Proportional Throttle Valve

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

Throttle Valve Hydraulic Symbol ( ) - Oilgear

At a Glance

Application:Diecast machines,
Media:Liquid
Max Allowable Working Pressure:5000 PSI

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.

Documentation

Please contact Oilgear directly for more detailed information on this proprietary product.

Technical Data Sheet 2-Way Servo-Controlled Proportional 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.