Ralston NPAK-0000 Pressure Calibration Kit

Overview

The Ralston NPAK-0000 is a portable, self-contained nitrogen pressure calibration system designed for field calibration of differential and static pressure instruments. With a built-in storage cylinder and precision pressure control mechanism, it provides independent operation without requiring external pumping or compressed gas connections. The kit is particularly suited for remote locations and hazardous environments where electronic instrumentation is restricted.

Key Features

• Pressure measurement capability: 0.03 psi (2 mbar) to 3,000 psi (210 bar)
• Fine-adjust piston with 0.0005 psi resolution for precise finger-tip control
• Internal nitrogen storage cylinder (15.20 cu ft capacity) for multiple calibrations per fill
• Dual-mode operation: piston control for pressures to 400 inH₂O (400 mbar); compressed gas for higher pressures
• No electronics—fully intrinsically safe for Class 1, Division 1/2 (North American) and ATEX/IECEX Zone 0/1/2 locations
• Portable design with carbon fiber cylinder and ABS plastic carrying case with ergonomic handle
• Integrated storage compartments for hoses, adapters, and reference pressure gauge
• Quick-test inlet and outlet ports (no thread sealant or wrench required)
• Soft-seated fill vent valves for reliable sealing
• Overpressure relief valve (3,300 psi)

Applications

• Field calibration of differential and static pressure transducers
• Pressure gauge calibration and verification
• In-situ testing of pressure instruments at remote locations
• Hazardous location calibration (Class 1, Div 1/2; ATEX/IECEX Zone 0/1/2)
• Flow meter and sensor verification

Included Accessories

• NPAK assembly with internal nitrogen storage cylinder
• Integrated hose and adapter storage bag with zippered nylon and Velcro
• Integrated pressure gauge storage pocket
• Quick-test hose and gauge adapter