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NPA-Series NEMA 4 Pressure Switch
Brand: Ashcroft Inc
The Ashcroft® NPA watertight pressure switch was designed to satisfy challenging applications needing high cycle rates with switch functionality.
This design incorporates proven thin film technology to trigger a high quality relay, making this an extremely reliable and long lasting switch.
This switch is ideal for use with pressure control, shutdown or alarm operations.
Specifications:
- Accuracy: ±0.50% full scale
- NEMA 3,4, 4X and 13 (IP66); aluminum enclosure
- Single setpoint
- Pressure ranges: 60 to 20,000 psi
- Multiple process connections available
- Adjustable deadband (as low as 0.5% of full scale)
- Multi-turn potentiometers allow easy setpoint and deadband adjustments
- Switch status indication
- SPDT 10 amp relay
Specifications
Brand
Accuracy
- ± 0.4 % BFSL
- ± 1.0 % of Full Scale Output
Adjustment Type
- Factory Set (Pre-Set)
- Field Adjustable
Burst Pressure
- bar: 33.09 to 4,136
- kPa: 3,309 to 413,685
- psig: 480 to 60,000
Compensated Temperature
- -29° to 71° C (-20° to 160° F)
Cone & Thread Connection
- 1/4” AMINCO Female
Diaphragm Material
- 630 Stainless Steel
Electrical Connectors
- 3/4” to 1/2” Conduit Reducing Bushing
- Left Side Conduit Connection
Electrical Rating
- 10 A, 250 Vac, 10 A, 3 Vdc
- 10 A, 250 Vac, 10 A, 30 Vdc, 4-20 mA
Enclosure, Body Material
- Aluminum
Environmental Protection
- IP54
- IP66
- NEMA 13
- NEMA 3, 4, 4X, 13 / IP54, 66
- NEMA 4
- NEMA 4X
Hysteresis
- ± 0.2 % of Span
Mounting
- 2” Pipe Mounting Bracket
NPT Connection
- 1/2” NPT Male
- 1/4” NPT Female
- 1/4” NPT Female & 1/2” NPT Male Combination
- 1/4” NPT Male
- 1/8” NPT Female
- 1/8” NPT Male
O-Ring Material
- 630 Stainless Steel
Operating Temperature
- -28° to 82° C (-20° to 180° F)
Options
- External Set Point Adjustment
Output
- 4-20 mA
Power Requirement
- 110 Vac, 50/60 Hz
- 24 Vdc
- 250 Vac, 50/60 Hz
Pressure Range
- bar: 4.14 to 1,378
- kPa: 413.7 to 137,895
- psig: 60 to 20,000
Pressure Type
- Gauge
Process Connection Material
- 316 Stainless Steel
Proof Pressure
- bar: 8.27 to 1,654
- kPa: 827.37 to 165,474
- psig: 120 to 24,000
Repeatability
- ± 0.5 %
- 0.07%
Response Time
- ≤ 5 milliseconds
SAE Connection
- 7/16”-20 SAE Male - 1/4” SAE Female
Set Point - Decreasing
- bar: 4.137 to 1,379
- kPa: 413.7 to 137,900
- psig: 60 to 20,000
Set Point - Increasing
- bar: 4.137 to 1,379
- kPa: 413.7 to 137,900
- psig: 60 to 20,000
Stability
- ± 0.5 % of Full Scale Output/Year
Storage Temperature
- -53° to 121° C (-65° to 250° F)
Supply Voltage
- 36 Vdc (Unregulated)
Switch Type
- SPDT
System Pressure
- bar: 4.14 to 1,654
- kPa: 413.7 to 165,474
- psig: 60 to 24,000
Temperature Range
- -28° to 82° C (-20° to 180° F)
Zero Offset
- ± 1.0 of Full Scale
- Process Market:
- Pipelines
- Industrial Market:
- Machine Tools
- Injection Molding Machines
- Presses
- Pumps
- Turbines and Compressors
- Specialized OEM Equipment
- Process Applications:
- Hydraulic Systems
