Calgaz, the world’s leading manufacturer of calibration gases and equipment, is proud to offer the most comprehensive range of specialist regulators globally for non-refillable and portable gas cylinders.
The Demand Flow Regulator is designed to work with pumped instruments. The regulator enables gas to flow when the instrument pulls a vacuum exceeding a 3″ water gauge. The regulator allows the calibration gas to flow at the rate required by the instrument, automatically cutting off the flow when the instrument is switched off.
The award-winning, patented DFR has been one of the most innovative products introduced into the industry in the past few years.
The DFR 2001 is used for the range of gases supplied by Calgaz with an inlet pressure of up to 1000 psi and for cylinders using the C10 fitting. The DFR 2003 has been developed for high-pressure usage up to 3000 psi and comes with a CGA fitting. The DFR 2004 is specifically recommended for very reactive gases such as Cl2 and HCN using a C10 valve, and the DFR 2006 for the high-pressure version. The DFR 2007 is the correct regulator for cylinders fitted with a CGA 600 valve used for non-reactive gases.
All regulators carry a 24-month warranty, and we recommend replacing them after two years of service.
Performance:
| Inlet | Outlet | On-Demand Flow Rate | Stages | Max Inlet Pressure | Demand Pressure | Gauge/Knob | |
| DFR 2001 | 5/8 – UNF C-10 | 4.8mm (3/16″) Tubing | 0 to 3 LPM | 2 | 70 Bar (1000 Psi) | 5.6mm (3″ H20) | 0-70 Bar (0-1000 Psi) |
| DFR 2003 | 1/4″ NPT Female* | 4.8mm (3/16″) Tubing | 0 to 3 LPM | 2 | 150 Bar (2200 Psi) | 5.6mm (3″ H20) | 0-207 Bar (0-3000 Psi) |
| DFR 2004 | 5/8 – UNF C-1 | 4.8mm (3/16″) Tubing | 0 to 3 LPM | 2 | 70 Bar (1000 Psi) | 5.6mm (3″ H20) | 0-70 Bar (0-1000 Psi) |
| DFR 2006 | 1/4″ NPT Female* | 4.8mm (3/16″) Tubing | 0 to 3 LPM | 2 | 150 Bar (2200 Psi) | 5.6mm (3″ H20) | 0-207 Bar (0-3000 Psi) |
| DFR 2007 | CGA 600 | 4.8mm (3/16″) Tubing | 0 to 3 LPM | 2 | 35 Bar (500 Psi) | 5.6mm (3″ H20) | 0-35 Bar (0-500 Psi) |
Materials of Construction:
| Body | Diaphragm | Piston | Piston Seal | Seat | Weight | |
| DFR 2001 | Ni-Brass | Buna | Ni-Brass | PTFE | Buna | 0.63kg (1lb) |
| DFR 2003 | Ni-Brass | Buna | Ni-Brass | PTFE | Buna | 0.63kg (1lb) |
| DFR 2004 | Ni-Brass | PVC | Ni-Brass | PTFE | Viton | 0.63kg (1lb) |
| DFR 2006 | Ni-Brass | PVC | Ni-Brass | PTFE | Viton | 0.63kg (1lb) |
| DFR 2007 | Ni-Brass | Buna | Ni-Brass | PTFE | Buna | 0.63kg (1lb) |
Cylinders Compatibility:
| 2AL | 6D | 6DM | 7HP | 8AL | 10AL | 5ELR | 65ALR | |
| DFR 2001 | ✓ | ✓ | ✓ | ✓ | ✓ | |||
| DFR 2003 | ✓ | ✓ | ||||||
| DFR 2004 | ✓ | ✓ | ✓ | ✓ | ||||
| DFR 2006 | ✓ | ✓ | ||||||
| DFR 2007 | ✓ |
