These springs are subjected to fault detection before being freed
for delivery. When compressed to their limit working position and
kept at that position for 24 hours, their permanent set shall not
exceed 0.3% of their free height.
In circular wire valve springs and oval (or egg-shaped) sectional
wire valve springs, both ends of the spring shall be ground flat.
The surface shall be subjected to corrosion-resistant surface
treatments such as bluing and phosphatizing.
Inner Packing:Packed in strong, impermeable neutral paper or plastic bags
and then placed in boxes. Or as per buyers' requirements.
Outer Packing:Corrugated cartons
Payment Term:T/T, L/C, D/P
Valve Springs
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