4250-Dead weight tester-High pressure (250MPa)

Working Principle:

Mechanical dead-weight testers or primary standards are the most accurate reference instruments

for pressure. Their functional principle is based on the physical principle of pressure = force/area.

Mass pieces placed on the top of a piston-cylinder system are the source of a precisely defined

force. By producing a certain (counter) pressure inside the pressure balance equilibrium is

achieved: the mass pieces, including the free-running piston of the piston-cylinder system, are

floating, which will lead to a very accurate pressure at the test port.

Applications:

1. Primary standard for defining the pressure scale in a range of up to 250MPa.
2. Pressure reference for factory and calibration lab for the testing, adjustment and calibration of

pressure measuring instruments.

Specification:

Model (optional): CW-2500T

Measuring range: (5~250) MPa, or user defined

Accuracy: 0.005%, 0.01%, 0.02%; 0.05% of Readings

Materials:

Piston system (the rod and cylinder): tungsten carbide

Weight (Masses): Non-magnetic stainless steel (0.02);

Carbon steel (0.05)

Base: stainless steel

Working medium:

＜25MPa : Mixed oil (transformer oil and kerosene oil)

≥25MPa : sebacate oil

Gravity: user’s local gravity

Features:

Able to test two gauges synchronously; Applied the fast pressure plug; no oil leakage;

The piston rod is anti-breakage structure.

With priming pump, it can fill oil to large capacity gauge, several gauges or long distance

calibration pipeline system.

The tester junction with stop valve and piston stop valve, so it can be used as independent

pressure source, when piston stop valve is closed.