◆ Clean the pipes

    Before the tests and starting of lhe installations ,carry out the abun- dant rinsing of piping(water ,air ,steam if compatible). It is essential to eliminate all the particles and various objects which could remain in the pipes and particularly welding residues which could definitively damage the valve seat.

◆ Align Pipings

    Check piping alignment. Do not rely on the valves to correct bad alignments:risk of leakage,operating defect or even breaking.

◆ Clean the gasket seat

    Before assembling,take care that the gasket seats are perfectly clean free from stripes prejudicial to good tightness．

◆ To avoid the “water hammers”

    A water hammer can generate a rise in pressure of extreme brutality. The damage caused by a water hammer is considerable:butterfly valve disc splits,axes deformed,destroyed various apparatuses. The causes of the water hammers are very varied but generally：the starting of pump and the sudden closing of valve.Attention,when starting the installation or testing ,take all the necessary precautions slow down motorized valves. 

◆ Handle the valves with precaution

    Sling valves by the body. Do not hang at the handwheel or the servo-moto. Attention with the shocks. 

◆ Respect assembly direction

    Some valves are one-way(non-return valve ,knife gate valves,etc). Take care of an assembly in conformity with the arrow direction or of the instructions of assembly. 

◆ Support the valves

    Before the tests and starting of lhe installations ,carry out the abun- dant rinsing of piping(water ,air ,steam if compatible). It is essential to eliminate all the particles and various objects which could remain in the pipes and particularly welding residues which could definitively damage the valve seat．

◆ To respect the tightening torques

     It is prejudicial applying higher tightening torque than needed. This can create markings on the seats and ,premature wears particularly for the rubber seat (diaphragm valves). 

◆ Weld valves opened

    Take care, when welding steel or stainless valves ,that the position is open. 

◆ To handle valve with precaution

     Take care of the coatings and protections. To avoid shocks and frictions which ,by destroying the coatings ,create starters of corrosion. 

◆ Store the equipment under good conditions

The valves must be stored protected from:
Humidity and rain to avoid corrosion;
Wind,sand: to avoid the penetration of solid particles whose presence is catastrophic for the tightness;
Sunshine and heat: they damage the coatings,particularly harmful for plastic valves and fittings very sensitive to the ultraviolet.
Valves with rubber seat must always be stored half-opened.
The apparatuses with metal seat must be stored closed (except particular specifications) to avoid the penetration of the particles in internal volumes.
Ball valves must be stored in open position.
Preserve the apparatuses with their plastic caps which should be taken away when mounting the valves.