BUILT-IN VALVES
Meters are available with built-in needle valves (CVT™ ), high precision metering valves (HRT™) with “non-rising stems”, or with no valves. The higher cost of HRT™ valves is justified whenever high sensitivity control and resolution are desirable particularly in conjunction with metering tubes of very low flowrates.
When meters with valves are ordered the valve cartridges are installed at the inlet. For vacuum service it is recommended that meters are ordered with valves at the outlet.
| SPECIFICATIONS |
| STANDARD ACCURACY ±2% FS (mm scales – except 042 flow tubes); ±5% FS (direct reading scales and 042 flow tubes) |
| CALIBRATED ACCURACY ±1% FS |
| REPEATABILITY ±0.25% FS |
| USEFUL FLOW RANGE 10:1 minimum with one float |
| MAXIMUM OPERATING PRESSURE 100 psig (6.7 bars) |
| MAXIMUM OPERATING TEMPERATURE 150°F (65°C) |
| LEAK INTEGRITY individually pressure and leak tested and certified to a rating of 1×10-7 sccs helium |
| MATERIALS OF CONSTRUCTION |
| FLOW TUBES heavy walled borosilicate glass (glass or sapphire floats recommended) |
| FITTINGS IN CONTACT WITH FLUIDS virgin PTFE and PCTFE |
| SIDE PANELS aluminum, black anodized |
| FRONT SHIELD 1/8 inch thick clear |
| BACK PLATE 1/8 inch thick white acrylics |
| O-RINGS PTFE |
| CONNECTIONS 1/8 inch NPT female inlet and outlet connections; optional glass hose nipples or compression fittings are available |
