Pressure Calibration Nitrogen Sources NPAK (3000 psi / 210 bar) Self contained nitrogen source, regulator, precision fine adjust, hoses, gauge adapters and process connections provide a complete pressure control solution for doing nitrogen calibration of pressure instruments in remote locations. Features: • Proprietary pressure balanced fine adjustment piston allows for extremely precise, finger-tip control of pressure at 0.03 psi (2 mbar) or 3000 psi (210 bar) or any range in between. • Easily refillable nitrogen cylinder holds enough gas for multiple calibrations • Nylon bag to hold hose and fittings attached to inside of lid • Includes storage compartment in control panel for pressure reference test gauge • Low volume Quick-test hose, gauge adapter and process connection can be attached to NPAK without thread sealant or a wrench • Optional padded strap for field use (NPAK-STRP) • Made in U.S.A. R alston Ins t rum ent s, L LC w ww.ralstonins t .com 1 . 8 0 0 . 3 47.6575 Pressure Calibration Nitrogen Sources NPAK (3000 psi / 210 bar) Specifications NPAK connection type National Pipe Thread (NPT) British Parallel Thread (BSPP)* Maximum pressure 3000 psi (210 bar) 3000 psi (210 bar) Pressure media Compressed nitrogen Compressed nitrogen Fine adjust resolution ± 0.0005 psi (0.035 mbar) ± 0.0005 psi (0.035 mbar) Mechanical rotation 42 turn (pressure balanced) 42 turn (pressure balanced) Operating temperature range 0º to 130ºF (-18º to 56º C) 0º to 130ºF (-18º to 56º C) Cylinder capacity 15.3 ft³ (430 l) 15.3 ft³ (430 l) Cylinder pressure gauge 2.5” (6.5 cm) psi / bar scale, ± 0.5% full scale accuracy 2.5” (6.5 cm) psi / bar scale, ± 0.5% full scale accuracy Regulated pressure gauge 2.5” (6.5 cm) psi / bar scale, ± 0.5% full scale accuracy 2.5” (6.5 cm) psi / bar scale, ± 0.5% full scale accuracy Over pressure relief 3200 psi (221 bar) relief pressure 3200 psi (221 bar) relief pressure Reference connection (brass) See below See below Quick-test hose 1 (brass ends) 6 ft (183 cm) long (QTQT-HOS-6’) 2 m (6.6 ft) long (QTQT-HOS-2m) Quick-test hose 2 (brass ends) 3 ft (92 cm) long (QTQT-HOS-3’) 1 m (3.3 ft) long (QTQT-HOS-1m) Process connection (brass) (2) 1/4” male NPT (QTHA-2MB0) (2) 1/4” female BSPP (QTHA-2FB0-RG) Inlet port (stainless steel) Male Quick-test with check-valve, cap and chain Male Quick-test with check-valve, cap and chain Outlet ports (stainless steel) (2) Male Quick-test with cap, and chain (2) Male Quick-test with cap, and chain Construction Aluminum, brass, plated steel Aluminum, brass, plated steel Internal connections Stainless steel tubing, tube fittings Stainless steel tubing, tube fittings Case Vented high impact ABS plastic Vented high impact ABS plastic Seal material Buna-N, Teflon™, Delrin™ Buna-N, Teflon™, Delrin™ Dimensions 18.5 x 14.6 x 7.5 in (47 x 37 x 19 cm) 18.5 x 14.6 x 7.5 in (47 x 37 x 19 cm) Weight 28.8 lb (13.0 kg) 28.8 lb (13.0 kg) Ordering Information NPAK calibration source NPT connections Model Description NPAK-1MBA-6’-3’ 1/8” male NPT gauge adapter (QTHA-1MBA), 2 hoses, 2 process connections NPAK-2MBA-6’-3’ 1/4” male NPT gauge adapter (QTHA-2MBA), 2 hoses, 2 process connections NPAK-2FBA-6’-3’ 1/4” female NPT gauge adapter (QTHA-2FBA), 2 hoses, 2 process connections NPAK-0000-0-0 NPAK only, no gauge connection, no hoses, no process connections NPAK calibration source BSPP connections* Model Description NPAK-2FBA-RG-2m-1m 1/4” female BSPP gauge adapter (QTHA-2FBA-RG), 2 hoses, 2 process connections NPAK-3FBA-RG-2m-1m 3/8” female BSPP gauge adapter (QTHA-3FBA-RG), 2 hoses, 2 process connections NPAK-4FBA-RG-2m-1m 1/2” female BSPP gauge adapter (QTHA-4FBA-RG), 2 hoses, 2 process connections * Not for sale in North American market For accessories, repair kits and hoses see page 17. For a complete list of accessories and parts see product manual or detailed specification sheet. For a list of the most commonly used gauge and process connections see page 18. For a complete list refer to Ralston Instruments Pressure Connection catalog. Contact your Ralston Instruments dealer or the factory for information on reference gauges and pressure calibration kits. R alston Ins t rum ent s, L LC w ww.ralsto nins t .com 1 . 8 0 0 . 3 47.6575