As discussed checking at Rotat we has found that the surface positions of the disc and seat not equal. So causes the valve leaking.
Because the installation the valve is not right position according to the type of the valve. So the costs of repair, TTCL will be responsible.
When valve repair is completed, will be available as usual.
But when put it to work may have leaked again. If haven't change the position of the valve at installed in proper position.