October 29, 2026
Fisher 67C and 67D Series regulators are compact, direct-operated devices used to reduce and control gas pressure for industrial instrumentation. They are commonly considered for pneumatic controllers, valve accessories, and other instrument air supply applications.
Although the two series share several design features, their intended service and available configurations should be checked before selecting a replacement or specifying a new installation.
The Fisher 67C Series is designed to provide controlled, reduced pressure for pneumatic and electropneumatic controllers and other instruments. Depending on the model, the series includes regulator and filter-regulator configurations.
The Fisher 67D Series is intended to provide reduced gas pressure to pilot-operated controllers and other pneumatic instrumentation. It also offers regulator and filter-regulator configurations, depending on the selected model.
| Selection factor | Fisher 67C Series | Fisher 67D Series |
|---|---|---|
| Main purpose | Instrument supply pressure regulation | Reduced gas pressure for pneumatic instrumentation |
| Typical service | Instrument air and compatible gases | Gaseous instrument supply applications |
| Product configurations | Regulator and filter-regulator options | Regulator and filter-regulator options |
| Installation | Compact design; panel mounting options | Compact design; panel mounting options |
| Key selection check | Required outlet pressure and filtration | Required outlet pressure and instrument requirements |
Both families offer options such as internal relief and Smart Bleed features on applicable models. These features are not necessarily included in every configuration.
Instrument air may contain moisture, oil, or particulate contamination that can affect pneumatic equipment. A filter-regulator combines pressure reduction with filtration, helping protect downstream instruments when the selected filter is suitable for the contamination level and maintenance requirements.
For example, the Fisher 67CFR and 67DFR are relevant configurations to evaluate when a filter-regulator is required. Confirm the exact model designation, filter arrangement, outlet pressure range, and connection size before ordering.
A regulator-only configuration may be sufficient where upstream air preparation already meets the instrument manufacturer's requirements.
Before choosing between the 67C and 67D Series, confirm:
Supply pressure and required outlet pressure
Gas type and operating temperature
Required flow capacity
Whether filtration or internal relief is needed
Port size, connection type, and mounting arrangement
Required materials and environmental conditions
Do not select a model based on the series name alone. The full model code determines important configuration details and operating limits.
For pneumatic control valve assemblies, Fisher 67C and 67D regulators can be considered alongside compatible valve positioners, pneumatic controllers, and instrument air accessories. Where a complete air supply package is required, the Fisher 67C-based Type R130 changeover manifold is another product worth evaluating for its specific application.
Fisher 67C and 67D regulators serve closely related instrument supply requirements. The best choice depends on the intended pneumatic service, pressure range, filtration needs, and exact configuration. Providing the full model code and operating conditions helps ensure that the replacement or new regulator meets the system requirements.
Suggested RFQ information: Existing model code, supply pressure, required outlet pressure, gas type, flow requirement, connection size, filtration requirement, and quantity.
