The 1/4-inch grey aluminum thing you see on literally every positioner, I/P, and controller
Go to any refinery, chemical plant, paper mill, or power station and 95% of the instrument air regulators are still Fisher 67C series. They’ve been making them since the 1970s and nothing else has managed to kill them off. You set it once with the big red knob, it holds 35 psi for ten years, the filter never plugs because the screen is huge, and when it finally dies you just unscrew four bolts and put a new one on in five minutes. Most instrument guys keep a spare in the truck “just in case".
| Ports | 1/4" NPT all four sides |
| Outlet range | 0–125 psig (most guys set 35 psi) |
| Max inlet | 250 psig |
| Flow | plenty – never the bottleneck |
| Temp | -40 °F to +180 °F |
| Weight | about 1 lb |
Q: Do you still make the 67C?
A: Yes – brand new ones ship every day from McKinney, Texas.
Q: What’s the difference between 67C, 67CR, 67CFR?
A: 67CFR has filter + gauge ports, 67CR has no filter, 67C is basic.
Q: Can I get spare diaphragms?
A: Yes – same part number since 1975, always in stock.
Emerson Fisher Regulators
Phone: +8615000725058
Email: edwardzhao@gbsxj.com
