• FINAL USER INSTRUCTIONS
• PERIODIC CHECKS
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Safety valves are the last apparatus to protect pressure equipments and people working on them when all other check devices have not attended. For this reason safety valves have to be well manufactured, assembled, fitted and periodically checked. Their design and construction are on our own responsibility whether the choice of their correct size and type depends on the decisions of the Manufacturer of the equipment where the valve is fitted. Maintenance is on final user’s responsibility to whom We are giving, hereby, all necessary instructions and information.

After the equipment installation or valve fitting, the following checks have to be made:

a) Verify that the safety valve corresponds to those one foreseen by the equipment Manufacturer on the ground of its final use. Check also all technical data written on the valve body and on the relative certificate that must be included in the equipment technical documentation;

b) Safety valves must be fitted in vertical position and in a place easy to be reached to facilitate maintenance and eventual rapid discharge actions;

c) In case of vessels filled with gas or steams and liquids, the relative safety valve must be fitted in the vessel area containing gas or steam, anyway as much as possible far from liquids;

d) Connection between vessel and safety valve has to be as short as possible and It must have a flow sectional area bigger than valve outlet area;

e) No narrowing or cutting device must be fitted between safety valve and vessel unless They are foreseen and stated by the equipment Manufacturer directly and in compliance with the rules and laws in force;

f) Pipings and connections must be cleaned and free of deposits, chips and scales.

a) Check that the safety valve has no visible sign of wear or damage;

b) Verify that the safety valve hasn’t any loss of fluid;

c) Open the safety valve manually to check pressure tightness and to remove eventual deposits lying in the valve inlet connection or, in case of conveyed safety valves, also in the valve outlet connection.

This action is very dangerous and It has to be carried out only in absolute safety conditions for the operator who must be very careful not to be injured by the discharged fluid.

To be in full working order safety valves need a careful maintenance programme on the ground of their specific working conditions. It’s important to foresee a periodic check of each safety valve and its set pressure that, being quite difficult, should be made at our workshop. This solution has the great inconvenience that the relative equipment has to be temporarily stopped or It should run without any safety valve during all the overhaul time.

UNIVERSAL s.r.l. is not responsible for eventual valve adjustments or tamperings made by the final user or for eventual equipment damages due to the absence of a safety valve under overhaul. For this reason please don’t hesitate to contact the equipment Manufacturer or our Technical Department to decide the better way to proceed.

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