EA SV Series, Original Operating Manual

12 

http://www.end.de 09/12

5 

Safety Valves

5.1 General

Before you are mount, adjust, operate or disassemble a safety valve you have to read

 Safety advices

If you have not read the safety advices until now, read this important advices now and turn back 
to this point..

5.2 

Corresponding use

Safety valves have to protect pipes and tanks for inadmissible over pressure. Safety valves rep-

resented the final safety device for pipe and tanks. Safety valves must be able to prevent tanks 

and pipes from inadmissible over pressure, if all the other control and safety devices would break 

down. To secure the function of a safety valve, safety valves required particular attention by 

mounting and maintaining.

A safety valve is a part of equipment with safety function  for the protection of pressure devices in 

the case of exceeding the permissible limits and thus is governed by the directive 2014/68/EU of the 

European Parliament and of the Council (“Regulation for Pressure Devices“) Article 1 Section 2.1.3.

It should only be used clean liquids and gases on which the material of the safety valve will be 

resistant. Pollution and using outside the nominal pressure and/or the nominal temperature range 

should causes damages on the safety valve especially on the seals.

At non-neutral media and media which do not tread out into the environment and also applications 

with a back pressure at the outlet port safety valves with bellows must be choosen.

5.3 

Operation

Safety valves do not need any special operation. 

But the ventilation should be operated in periodi-

cal turns.

 (see chapter 5.6. „maintenance“).

5.3.1 

Advice for storage  and starting of safety valves

After transport and storage for some time at armatures with a formerly adjusted action pressure 

a delayed opening at the first time will be normal. This effect causes by the pasting up seat and 

cone of a valve. This will be happen at sealing areas metal / elastomer and also  at sealing areas 

metal / metal.

After mounting the valve the sealing areas will be loosen by actuating the ventilation knop / lever 

and feeding  the valve with compressed air and increasing the pressure range above the action 

pressure.

After this procedure the armature will be serviceable with the formerly adjusted action pressure in 

consideration for the permitted increasing pressure / closing pressure.

Corresponding use