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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.