Differential Pressure Dead Weight Tester

The model BL508 high static differential pressure deadweight tester ideal primary standard for defining the static pressure up to 60MPa.

Both the piston and cylinder are manufactured from tungsten carbide. This pairing of materials, in comparison to other materials, has very low pressure and temperature coefficients of expansion, which results in a very good linearity for the effective area of the piston and a very high accuracy. Over-pressure protection is integrated, which prevents the piston from being forced out vertically and avoids damage to the piston-cylinder system in the event of masses removal under pressure.

• Static pressure ranges 0.1MPa to 60MPa;
• Differential pressure is (0.05~1000) kPa
• Accuracy is 0.01% rdg for single piston, or (2Pa + 5x10-7*P + 1x10-4*△P) for dual pistons
• Traceable to International Standards.
• The piston and cylinder is made of the high intensity, extreme hardness and lowest thermal expansion tungsten carbide
• Piston/cylinder design provides stability and repeatability
• Lowering speed of differential piston is 0.5mm per minute with 5 kg loading
• Sensitivity threshold at zero is 10mg.

Model

BL508

Accuracy

When use one of two piston gauges, accuracy is 0.01%rdg; When test static pressure, accuracy is (2Pa + 5x10-7*P + 1x10-4*△P), where P= Static Pressure Pa, △P = differential pressure value

Piston material

Tungsten carbide

Cylinder material

Tungsten carbide

Mass material

Forged 316 stainless steel

Hydraulic base material

Casting iron

Seal material

Buna-N, FTM, PTFE, Copper Alloy

Medium

Mineral oil lubricated and pure nitrogen operated (built in oil-gas separator)

Gravity

Standard 9.80665 m/s² or customize local gravity

Pressure units

 MPa, bar, psi (optional)

Pressure connector

 Metric, (NPT and BSP is optional)

Base dimension

540 mm (H) x 625 mm (L) x 480 mm (D)

Base weight

Appr.35kg

Warranty

2 years

Part

Number

Pressure

Range

Kn Value

Effective Area

Piston &

Cylinder

Increment

Mass Set

Media

GCY7

(0.1~7) MPa

0.5MPa/kg

0.2 cm2

200g

14kg+14kg

N2

GCY20

(0.5~20) MPa

1MPa/kg

0.1 cm2

500g

20kg+20kg

N2

GCY60

(1~60) MPa

2MPa/kg

0.05cm2

500g

30kg+30kg

N2

• BL508 Static pressure deadweight tester base
• Piston cylinder module
• “MPa” 316SS increment mass sets
• Adapter kits (1/4NPT, ½NPT, ¼BSP, ½BSP)
• Factory calibration report
• Operating manual

• Customized “psi” unit 316SS mass set (P/N: IMS-PSI)
• Oil-Water Separator, 40 MPa, no diaphragm (P/N: 1556-40)
• Oil-Water Separator, 70 MPa, no diaphragm (P/N: 1556-70)
• CNAS accredited calibration certificate (P/N:9000-502)