VALVES
Models SG5340, SG5350
Ultra-Fine, Low Flow, Metering Valves
Designed for extremely low flow gas and liquid applications, these valves provide smooth, nonpulsing flow control which is always proportional and absolutely constant at any given setting. They are particularly suited to the most precise control requirements of gas chromatography.
Six different needle tapers offer a wide choice of flow ranges. Fifteen revolutions of the adjusting handle (“fully opened” to “fully closed”) provide excellent resolution. The valves will shut off bubble-tight and cannot be
damaged by overtightening.
Two Models are available. Model SG5340 has a nickel-plated brass body for non-corrosive service, and Model SG5350 has a Type 316 Stainless Steel body
for corrosive applications. These valves are provided standard with mounting nuts for panel mounting applications.
Specifications
Maximum Operating Pressure:
SG5340: 600 psig at 70°F
SG5350: 1000 psig at 70°F
Maximum Operating Temperature:
SG5340: 180°F
SG5350: 250°F
Flow Coefficient:
Inlet & Outlet Connections: 1/8" NPT female
Approximate Weight: 5 oz
|
Materials of Construction
Body:
Internal Parts Exposed to Gas:
SG5340: Brass, Delrin®
and Stn. Stl.
SG5350: Type 316 Stn. Stl. and Vespel®
Seals: Viton® |
Table I, Metering Valves
| Body Material |
Part No. |
| Nickel-Plated Brass |
SG5340-( ) |
| Type 316 Stn. Stl. |
SG5350-( ) |
Table II, Flow Capacity
Needle
Taper No.
|
Flow Coefficient (Cv) |
Flow Capacity (sccm)* |
| Helium |
Air |
Water |
| 1 |
0.00029 |
300 |
150 |
4 |
| 2 |
0.00066 |
700 |
350 |
10 |
| 3 |
0.0013 |
1,400 |
600 |
20 |
| 4 |
0.0057 |
6,000 |
2,400 |
80 |
| 5 |
0.017 |
18,000 |
6,800 |
200 |
| 6 |
0.052 |
55,000 |
27,000 |
650 |
|
