Ralston
Ralston QTVC Compressed Gas Volume Controller
Model QTVC-VC
Ralston QTVC compressed-gas volume controller: to 3,000 psi (200 bar), 0.0005 psi fine adjustment, 42-turn pressure-balanced control — for low-pressure differential or high-pressure static calibration with nitrogen.
From $1,943.23list price
Pick your exact configuration in the ordering table below to add it to your cart.
Same-day response on quotes. ISO/IEC 17025 accredited calibration available.
Overview
The Ralston QTVC is a compressed-gas volume controller. Ralston positions it for both ultra-precise low-pressure differential and high-pressure static pressure calibrations with nitrogen, using the same device with an external pressure calibrator.
QTVC-0000-0-0
Per Ralston, QTVC-0000-0-0 is the volume controller only, with no gauge adapter, hoses or process connections.
Related
For a self-contained nitrogen source, see the Ralston NitroPak. Browse pumps & generation, digital pressure gauges and Quick-test hoses.
Specifications
| Key specifications (Ralston datasheet) | |
| Max pressure | 3,000 psi / 200 bar / 20 MPa |
| Max vacuum | 10 inHg / 33.9 kPa |
| Fine adjustment resolution | 0.0005 psi / 3 Pa |
| Mechanical rotation | 42 turns (pressure balanced) |
| Inlet port | Male Quick-test |
| Outlet ports | Male Quick-test; male Quick-test with cap and chain |
| Media compatibility | Air, inert gas, natural gas |
| Seal materials | Buna-N, Delrin, Teflon |
| Operating temperature | 0 to 130 °F (−18 to 54 °C) |
| Controller weight | 3.70 lb / 1.68 kg |
Videos
QTVC Volume Controller Features and Benefits
QTVC Volume Controller Setup and Operations
Documents
Build your part number
Configure your QTVC
Pick your options and we'll build the exact part number with a list-price estimate.
Select a included items to build your part number.
Specify the included items for a Volume Controller to work with your reference gauge and process connection. Controller is 3,000 psi / 20 MPa. Shipping and tax are confirmed when we review your order.
Ordering information
25 ordering models available.
| Model | Description | List Price | |
|---|---|---|---|
| QTVC-0000-0-0 | QTVC volume controller only, no gauge adapter, no hoses, no process connections | $1,943.23 | |
| QTVC-1KPSIG-D | QTVC volume controller, 1000 PSI digital gauge, 6ft, 3ft hoses, (2) 1/4in MNPT process conn. | $2,895.71 | |
| QTVC-1KPSIG-FL | Calibration kit, QTVC volume controller, 1000 psi / 70 bar / 7 MPa FieldLab (0.1% of Reading Accuracy) | $4,832.38 | |
| QTVC-1MBA-2m-1m | Precision volume controller, 1/8" male NPT gauge connection, 6' inlet, 3' outlet hoses | $2,150.01 | |
| QTVC-1MBA-6-3 | QTVC volume controller, 1/8 in MNPT gauge adapter,6ft, 3ft hoses, (2) 1/4" MNPT process conn. | $2,144.37 | |
| QTVC-2FBA-2m-1m | Precision volume controller, 1/4" female NPT gauge connection, 2m inlet, 1m outlet hoses | $2,152.33 | |
| QTVC-2FBA-6-3 | QTVC volume controller, 1/4in FNPT gauge adapter, 6ft, 3ft hoses, (2) 1/4" MNPT process conn. | $2,146.69 | |
| QTVC-2FBA-RG-2m-1m | QTVC volume controller, 1/4in FBSPP gauge adapter, 2m, 1m hoses, (2) 1/4" FBSPP process conn. | $2,197.64 | |
| QTVC-2MBA-2m-1m | Precision volume controller, 1/4" male NPT gauge connection, 6' inlet, 3' outlet hoses | $2,153.85 | |
| QTVC-2MBA-6-3 | QTVC volume controller, 1/4in MNPT gauge adapter, 6ft, 3ft hoses, (2) 1/4" MNPT process conn. | $2,148.21 | |
| QTVC-3FBA-RG-2m-1m | QTVC volume controller, 3/8in FBSPP gauge adapter, 2m, 1m hoses, (2) 1/4" FBSPP process conn. | $2,200.08 | |
| QTVC-3KPSIG-D | QTVC volume controller, 3000 PSI digital gauge, 6ft, 3ft hoses, (2) 1/4in MNPT process conn. | $2,895.71 | |
| QTVC-3KPSIG-FL | Calibration kit, QTVC volume controller, 3000 psi / 200 bar / 20 MPa FieldLab (0.1% of Reading Acc.) | $4,953.74 | |
| QTVC-4FBA-RG-2m-1m | QTVC volume controller, 1/2in FBSPP gauge adapter, 2m, 1m hoses, (2) 1/4" FBSPP process conn. | $2,211.14 | |
| QTVC-500PSIG-D | Calibration kit, QTVC volume controller, 500 psi / 35 bar / 3.5 MPa digital gauge (0.25% of Full Scale Accuracy) | $2,710.84 | |
| QTVC-500PSIG-FL | Calibration kit, QTVC volume controller, 500 psi / 35 bar / 3.5 MPa FieldLab (0.1% of Reading Accuracy) | $4,832.38 | |
| QTVC-KIT1-GR | 3000 psi / 20MPa calibration kit with FieldLab, 2 port manifold and hoses | $6,913.36 | |
| QTVC-KIT2-GR | 3000 psi / 20MPa calibration kit with FieldLab, 4 port manifold and hoses | $7,557.72 | |
| QTVC-KIT3-GR | 3000 psi / 20MPa calibration kit with Wireless FieldLab, 2 port manifold and hoses | $7,192.00 | |
| QTVC-KIT4-GR | 3000 psi / 20MPa calibration kit with Wireless FieldLab, 4 port manifold | $7,836.36 | |
| QTVC-KIT5-GP | QTVC volume controller, 1000 PSI LC20 digital gauge, 6ft, 3ft hoses, (2) 1/4in MNPT process conn. | $3,086.25 | |
| QTVC-KIT5-GR | QTVC volume controller, 3000 PSI LC20 digital gauge, 6ft, 3ft hoses, (2) 1/4in MNPT process conn. | $3,086.25 | |
| QTVC-KIT5-GR-B1 | QTVC volume controller, 1/4" female NPT gauge connection, (2) hoses, 3000 psi LC20 gauge with Bluetooth | $3,211.38 | |
| QTVC-KIT5-VN | Calibration kit, QTVC volume controller, 500 psi / 3.5 MPa LC20 digital gauge (0.1% of Full Scale Accuracy) | $2,841.29 | |
| QTVC-KIT6 | Precision volume controller, 1/4" FNPT, 1/4" MNPT, 1/8" MNPT gauge connection, 2 hoses | $2,190.51 |
Related products
Official compatibility and accessories for this model - not look-alike suggestions.
Official Ralston Quick-test: valved fittings used with QTVC volume controller
Official Ralston Quick-test: tube Quick-connect hoses used with QTVC volume controller
Official Ralston Quick-test: DCAP-PV hand pump used with QTVC volume controller
Official Ralston Quick-test: LC20-DS field gauge with QTVC volume controller
Official Ralston Quick-test: DV0V vacuum hand pump with QTVC volume controller
Official Ralston Quick-test: LC20 sanitary field gauge with QTVC volume controller
Official Ralston Quick-test: QTCM calibration manifold kits with QTVC volume controller
Official Ralston: NitroPak nitrogen source with QTVC volume controller
Official Ralston Quick-test: QSCM calibration manifold kits with QTVC volume controller
Official Ralston Quick-test: QTHP hydraulic hand pump kits with QTVC volume controller
Official Ralston Quick-test: LC30-PT process meter with QTVC volume controller
Official Ralston Quick-test: SP0V gas sampling pump with QTVC volume controller
LC20 field gauge
LC10 field gauge
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