Specifications

Vessel

Examination

Seat tightness and set pressure of the safety valve may only

be examined by means of the bubble method outlined below.

Contamination and corrosion of the valve mechanics are thus

avoided. The set pressure is indicated on the type plate of the

safety valve.

1. Admission of Test Pressure

For the admission of the test pressure, a suitable testing

device has to be used. With safety valves which shall not be

dismantled, the test may be executed by the vessel pressure.

Do not carry out examinations with oxygen or combustible as

well as corrosive gases.

2. Examination of Seat Tightness

Increase the test pressure to 90 % of the set pressure. The

valve has to remain tight.

3. Examination of Set Pressure

Slowly increase the test pressure to 100 %. The safety valve

will blow off.

The set pressure may deviate from the nominal value +/-

10%.

Full-flow safety valves do open abruptly! Possibly,

set pressure and opening pressure are identical.

Wrap PTFE – tape on the R1/4“ connection and screw it tight

in the connection thread.

Caution! Be careful, that no parts of PTFE peel away

into the medium tube, which will cause malfunction of

the safety valve

The application of the following means and tools to

the safety valve are prohibited:

• pliers

• striking tools

• lubricating spray

• hemp

• open flame

• vapour

• leak indicating spray

• lees

2.4 Examination of Safety Valve

2.5 Assembly of Safety Valve

2.6 Wrong Installation /

Operating Errors