Ralston Volume Controllers
Extreme calibration precision for wide range of pressure control applications
Ralston Volume Controllers can be used to control pressure in very low pressure applications (0-400 inH20) as well as higher pressure applications (0-3000 psi).
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Applications for the Volume Controller
Differential Pressure Transmitter Calibration
Use the Volume Controller to hit pressure test points quickly and accurately. It can be used without nitrogen to control pressure for calibrating the differential pressure side of a pressure transmitter up to 400 inH2O / 1000 mbar. With compressed nitrogen applied it can be used to control pressure for calibrating the static side of a pressure transmitter to 3000 psi / 200 bar.
Analog Pressure Gauge Calibration
When used in conjunction a digital test gauge and a 2 or 4 port benchtop manifold it can be used to calibrate 2 or 4 of the same range pressure gauges at the same time. This works much quicker and more efficiently than a deadweight tester for calibrating analog pressure gauges. This makes an excellent choice for a laboratory to calibrate pressure gauges in a wide range of pressures.
Vacuum Pressure Gauge or
Transmitter Calibration
Connect the Volume Controller in line with a mechanical vacuum pump. Pull a vacuum on the inlet side of the Volume controller and control vacuum to precise test points better than with virtually any other device.
Float Pneumatic Piston Gauges
In high precision pressure calibration the Volume Controlle can provide a precise pressure to float a piston gauge so that the piston gauge can deliver accurate pressure.
Get Set Up Quickly
The Ralston Volume Controller has a very straight forward interface thats easy to understand. Watch the “How To” video to see how easy it is to set up the QTVC, move test pressure up and down, then vent the system for shutdown.
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Volume Controllers with & without Gauge Connection
Calibrate both very low pressure or high pressure instrumentation (up to 3000 PSI) using nitrogen with an attached pressure gauge or calibrator.
| Model | Max Pressure | Gauge Adapter | Pressure Gauge | Hose 1 | Hose 2 | Hose Adapter |
|---|---|---|---|---|---|---|
| QTVC-0000-0-0 | 3000 PSI / 200 bar / 20 MPa | None | None | None | ||
| QTVC-1MBA-6-3 | 3000 PSI / 200 bar / 20 MPa | 1/8" Male NPT (ASME B1.20.1) | None | Quick-test Hose, Brass ends, 6ft / 1.9m long | Quick-test Hose, Brass ends, 3ft / 0.9m long | Female Quick-test, brass |
| QTVC-2MBA-6-3 | 3000 PSI / 200 bar / 20 MPa | 1/4" Male NPT (ASME B1.20.1) | None | Quick-test Hose, Brass ends, 6ft / 1.9m long | Quick-test Hose, Brass ends, 3ft / 0.9m long | Female Quick-test, brass |
| QTVC-2FBA-6-3 | 3000 PSI / 200 bar / 20 MPa |
Volume Controllers - Full Calibration Kits
Connect to and calibrate both very low or high pressure instrumentation using included volume controller and pressure gauge.
| Model | Max Pressure | Gauge Adapter | Pressure Gauge | Hose 1 | Hose 2 | Hose Adapter |
|---|---|---|---|---|---|---|
| QTVC-3KPSIG-D | 3000 PSI / 200 bar / 20 MPa | 1/4" Male NPT (ASME B1.20.1) | Digital pressure gauge, 3000 PSIG Pressure | Quick-test Hose, Brass ends, 6ft / 1.9m long | Quick-test Hose, Brass ends, 3ft / 0.9m long | Female Quick-test, brass |
| QTVC-1KPSIG-D | 3000 PSI / 200 bar / 20 MPa | 1/4" Male NPT (ASME B1.20.1) | Digital pressure gauge, 1000 PSIG Pressure | Quick-test Hose, Brass ends, 6ft / 1.9m long | Quick-test Hose, Brass ends, 3ft / 0.9m long | Female Quick-test, brass |