The Henry G. Dietz Co., Inc.
Industrial Pressure Switches • Vacuum Switches • Differential Switches
DIETZ MODELS 171D AND 170D SPECIFICATIONS
DIETZ 171D / 170D Technical Specifications (526KB PDF)
Mechanical
- Set Point Ranges: 0.05"–40" H20 (see Chart)
- Dead Band: Consult Factory
- Proof Pressure: Up to 25 psi (dependant on model)
- Mechanical Life: 1,000,000 Cycles
- Temperature Range: -30–160°F
Physical
- Housing Material: Zinc Die Cast, Steel & Aluminum Stamping
- Diaphragm: 0.008" Nitrile / Nylon Cloth (model 170)
0.005" Silicone PE Cloth (model 171) - Pressure Port: 1/8–27 NPT Female
- Electrical Connection: Screw Terminals
- Weight: 2.875 lbs
Electrical
- Switch Type: SPDT Snap Action
- Current Rating
- See Chart
Construction
- 0.008" Buna (Nitrile) coated nylon diaphragm for temps of -30° F to 160° F. Silicone coated cloth can be used for greater temperature extremes.
- Sturdy zinc die cast, steel, and aluminum stampings
If you would like to provide information about your application requirements, please complete our Application Data Sheet »
DIETZ MODELS 171D / 170D
Ultra Low Differential Pressure Switches
The Dietz Model 170D Ultra Low Differential Pressure Switch combines extremely low pressure actuation, maximum electrical ratings and rugged construction to withstand unusually harsh environments. The 171D is shock and vibration resistant, due to a minimum number of moving parts and the absence of lever amplifiers, and will actuate at 1" H2O under extreme shock and vibration conditions. Overpressure of 25 lbs per square inch will not damage the switch or change calibration settings. Diaphragm movement is limited to provide an extremely long diaphragm life.
This rugged but simple design makes the Dietz 170D ideal for use on locomotives, ships, construction equipment, and variety of outdoor applications. A highly resistant epoxy finish for use where corrosive fumes or acids are present, such as in chemical plants, plating rooms, and sewage plants.
FEATURES / BENEFITS
- Rugged design for use in harsh environments
- Pressure ranges from 1"–40" H20
- Shock and vibration resistance (MIL-S-901-D & MIL-STD-167-1)
- Chemical resistant epoxy finish
- Suitable for high voltage / current applications
APPLICATIONS
- Air flow interlock
- Output for fluid amplifiers
- Measurement, sensing, switching, sequencing in simple fluidic circuits requiring an auxiliary air supply
Model Number |
Part Number |
Operating Range |
Switch Current |
170D8W-S |
D21530 |
1.0–8.0" H20 |
10 Amp 125 VAC |
170D8W |
D21531 |
2.0–8.0" H20 |
15 Amp 125 VAC |
170D20W |
D21532 |
2.0–20" H20 |
15 Amp 125 VAC |
170D40W |
D21533 |
2.0–40" H20 |
15 Amp 125 VAC |
171D8WC-S |
D21540 |
0.05–8.0" H20 |
10 Amp 125 VAC |
171D8WC |
D21541 |
0.15–8.0" H20 |
15 Amp 125 VAC |
170D8W-S-DC |
D21564 |
1.0–8.0" H20 |
0.75 Amp 75 VDC |
170D8W-DC |
D21536 |
2.0–8.0" H20 |
0.75 Amp 75 VDC |
170D20W-DC |
D21537 |
2.0–20" H20 |
0.75 Amp 75 VDC |
170D40W-DC |
D21538 |
2.0–40" H20 |
0.75 Amp 75 VDC |
171D8WC-DC |
D21542 |
0.15–8.0" H20 |
0.75 Amp 75 VDC |