Fisher 67CFR Filter Regulator Overview
The Fisher 67CFR filter regulator is a direct-operated, low-flow pressure reducing regulator from Emerson’s Fisher division. Designed for instrument air supply applications, the 67CFR series provides stable, controlled pressure for pneumatic and electro-pneumatic controllers, spray guns, pneumatic clamps, and other instrumentation systems.
As a core product in our inventory, we supply genuine Fisher 67CFR regulators from DN20 to DN50, with comprehensive documentation and technical support for selection, installation, and field service.
Key Applications
- Pneumatic and electro-pneumatic controllers
- Industrial automation control systems
- Spray guns and air nozzles
- Pneumatic chucks and clamping devices
- General instrument air supply systems
Series Variations
| Series | Material | Application |
|---|---|---|
| 67CFR | Aluminum alloy | Standard air and gas applications |
| 67CFSR | Stainless steel | Corrosive environments, NACE compliant |
Technical Specifications
Pressure Ratings
| Parameter | Value |
|---|---|
| Maximum Inlet Pressure | 250 psi |
| Outlet Pressure Range | 0 to 125 psi |
| Minimum Operating Pressure | 10-15 psi |
Flow Capacity
Maximum flow: 30 Nm³/h
Materials of Construction
- Body: Aluminum alloy (67CFR) or Stainless steel (67CFSR)
- Filter: Standard 40-micron element, optional 10-micron
- Diaphragm: Nitrile rubber (standard), FKM (NACE service)
- Trim: Soft-seated cartridge design
Special Features
- Built-in Filter: Removes water, oil, and particulate from supply air
- Internal Relief Valve: Handles minor seat leakage (not primary overpressure protection)
- Smart Bleed™ Technology: Zero air loss during normal operation
- Compact Design: Lightweight, space-saving for small systems
- NACE Compliance: Stainless steel models meet NACE MR0175/MR0103 for sour gas service
Common Models
The Fisher 67CFR series includes numerous configurations. Common models we supply include:
- 67CFR-224, 67CFR-225, 67CFR-226
- 67CFR-235, 67CFR-237, 67CFR-239
- 67CFR-600, 67CFR-601
- 67CFR-585, 67CFR-581
- 67CFR-24, 67CFR-26, 67CFR-38
- 67CFR-206, 67CFR-362
Fisher 67CFR Troubleshooting Guide
Symptom 1: Zero or Very Low Outlet Pressure
Step 1: Check Supply Pressure
- Verify inlet pressure exceeds minimum requirement (10-15 psi)
- Confirm upstream shutoff valve is fully open
- Check for upstream pressure drops or blockages
Step 2: Clean or Replace Filter Element
The 67CFR incorporates a built-in 40-micron filter (10-micron optional). Contaminated media causes filter clogging.
- Close inlet and outlet isolation valves
- Open drain port to depressurize
- Remove and inspect filter element
- Clean or replace as necessary
Step 3: Inspect Valve Plug and Seat
Foreign particles may jam the plug in the closed position.
- Disassemble valve body
- Remove debris from internal passages
- Inspect plug and seat for damage
Symptom 2: Unstable or Fluctuating Outlet Pressure
Step 1: Verify Flow Requirements
Downstream demand fluctuations exceeding rated capacity (30 Nm³/h) cause response lag in direct-acting regulators.
Step 2: Inspect Diaphragm
Diaphragm fatigue or micro-cracks cause pressure oscillation.
- Remove spring case cover
- Inspect diaphragm for deformation or cracks
- Replace diaphragm assembly if damaged
Step 3: Check Vent Port
The 1/4 NPT spring case vent must remain unobstructed for proper diaphragm pressure balance.
- Inspect vent for oil, grease, or dust accumulation
- Clean thoroughly with appropriate solvent
Symptom 3: Outlet Pressure Exceeds Setpoint (Cannot Reduce)
Step 1: Examine Regulating Spring
- Check for broken or deformed spring
- Verify handwheel adjustment mechanism operates freely
- Replace spring or repair adjustment screw if damaged
Step 2: Check for Plug Sticking
Plug jammed in open position due to contamination or bent stem.
- Disassemble and clean all internal components
- Check stem straightness with dial indicator
- Replace bent or worn stems
Symptom 4: Continuous Leakage (Vent or Connection Points)
Step 1: Replace Soft Seat
The 67CFR uses soft-seated cartridge design. Long-term operation causes seat wear.
- Replace complete plug cartridge assembly
- No need for individual seat lapping
Step 2: Check Threaded Connections
- Apply soap solution to all 1/4 NPT connections
- Tighten or reseal with PTFE tape as needed
Step 3: Verify Smart Bleed™ Operation
Smart Bleed models vent slightly when inlet pressure drops below outlet pressure. Continuous venting at normal pressure indicates internal relief seat damage.
Quick Diagnostic Checklist
| Fault Symptom | Most Likely Cause | Quick Action |
|---|---|---|
| Zero outlet pressure | Clogged filter / Low supply pressure | Clean/replace filter, adjust upstream pressure |
| Pressure fluctuation | Diaphragm crack / Blocked vent | Clear vent port, replace diaphragm |
| Cannot reduce pressure | Plug sticking / Spring failure | Disassemble and clean, replace spring |
| Continuous vent leakage | Worn soft seat | Replace cartridge assembly |
Maintenance & Repair Procedures
Safety Precautions
- Close upstream and downstream isolation valves
- Open drain valve to completely depressurize
- Confirm zero pressure before disassembly
- Never service under pressure
Spare Parts & Replacement
Recommended Spare Parts
| Part Description | Part Number | Application |
|---|---|---|
| Nitrile diaphragm | 10B8735X012 | Standard air/nitrogen service |
| Stem O-ring | 1D687506992 | All models |
| Diaphragm cavity O-ring | 17A2325X022 | All models |
| Plug cartridge assembly | RDXCNTRM142 | 67CFR-224/225/226/237/239 |
| Regulating spring (0-60 psi) | 12A8818X012 | Standard range models |
| Repair kit (soft parts) | RPACKX00042 | 1/4 NPT models |
Calibration Procedure
- Connect standard pressure source and 0.2% accuracy test gauge to outlet
- Fully counterclockwise handwheel to release spring force
- Slowly open upstream supply
- Clockwise adjust handwheel in 3-5 steps across selected range
- Record actual vs. set pressure at each point
- Adjust stem travel if deviation exceeds tolerance
- Verify stability with 2-3 repeat cycles
- Seal unused vent ports after completion
Related Reading
- Fisher 67CFR and 67CFSR Filter Regulators: High-Performance Air Supply Solutions
- Fisher 67CFR-239/SB Filter Regulator — Complete Guide & Specifications
- Fisher DVC6200/DVC2000 Feedback Signal Troubleshooting: 3 Common Field Problems and Solutions
- Fisher EZR Pressure Reducing Regulator: Technical Specifications and Applications
- Endress+Hauser Cerabar PMP71B Pressure Transmitter: Technical Specifications and Heartbeat Technology
Technical Support
For genuine Fisher 67CFR regulators, spare parts, and technical consultation:
Email: sales@yunrui-controls.com
WhatsApp: 18710784030
Our team provides application engineering support for Fisher 67CFR selection, installation, and field troubleshooting across international markets.