Electric ball valve Maintenance and repair
1, electric ball valve should be stored in dry ventilated indoor, access to both ends must be blocked.
2, long-term storage of electric ball valve should be regularly inspected, remove dirt, and in the processing surface coated with anti-rust oil.
3, after installation should be regularly inspected, the main inspection items such as:
(1) Wear condition of sealing surface.
(2) The wear of trapezoidal thread of stem and stem nut.
(3) Whether the filler is obsolete or not, if the damage should be replaced in time.
(4) After the electric valve overhaul assembly, the seal performance test is required.
Operation of the electric ball valve, a variety of valve accessories need to complete, intact. The bolts on the flange and the bracket are indispensable, the thread should be intact, and the loosening phenomenon is not allowed. The fastening nut on the handwheel, if found loose should be tightened in time, lest wear connection place or lose Handwheel and nameplate. If the handwheel is lost, it should not be replaced with a live wrench. The packing gland is not allowed to skew or have no pretension clearance. For the easy to be affected by rain and snow, dust, such as contamination of the environment in the electric valve, the valve stem to install protective cover. The ruler on the electric ball valve should be kept intact, accurate and clear. Electric valve seals, caps, pneumatic accessories should be complete intact. The insulation jacket should be free of dents and cracks. Do not allow the operation of the electric ball valve on the beat, station or support load, especially non-metallic electric ball valve and cast iron ball valve.