1, the stainless steel joint valve should be stored in a dry and ventilated room, the two ends of the path must be blocked.
2. Valves stored for a long time should be inspected regularly to remove dirt and apply anti-rust oil on the processing surface.
3. After installation, regular inspection shall be conducted. Main inspection items:
(1) Wear condition of sealing surface.
(2) Trapezoidal thread wear of stem and stem nut.
(3) Whether the packing is out of date and should be replaced in time if damaged.
(4) Sealing performance test shall be carried out after valve overhaul and assembly.
Valves in operation, all kinds of valve parts should be complete, intact. The bolts on the flange and support are indispensable. The thread should be in good condition and looseness is not allowed. Tighten the fastening nut on the handwheel in time if found loose, so as not to wear the joint or lose the handwheel and nameplate. If the hand wheel is lost, it is not allowed to replace it with a flexible wrench. Packing gland does not allow skew or no pretighten clearance. The valve stem shall be fitted with a protective cover for the valve in an environment susceptible to dirt such as rain, snow, dust and wind. The scale on the valve should be complete, accurate and clear. Valve seal, cap, pneumatic accessories should be complete and intact. Insulation jacket should have no sag, crack.
Do not knock, stand or support heavy objects on the valve in operation. Especially non - metal valves and cast iron valves, more to prohibit.
China's valve manufacturing industry after decades of development, has made great progress, valve output has achieved a significant increase.
In the era of financial crisis, the world economy is gradually recovering, and the import and export market of China's valve mechanical and electrical products is also gradually growing steadily, the international competition in the valve industry will be more intense. China's valve manufacturers and foreign large valve manufacturers, we have a large gap in the main high-end technology. Product technology innovation and promotion has become a major stumbling block to the rapid development of China's valve products.
Valve is an important fluid control equipment in industry, which involves many sectors of national economy and is an important basic equipment for the development of national economy. After decades of development, China's valve products have formed more than a dozen categories, especially in the number of enterprises and production and sales in the world's forefront, but mostly small, low level valve enterprises, products are mainly in the middle and low end.
Since the reform and opening up, the valve market has expanded rapidly, and state-owned enterprises have suffered from the crisis of shutting down and turning under the influence of the system. Towns and villages and private enterprises can only imitate production due to limited technical force, which is the main reason for the low quality of domestic valves. The state has introduced policies to revitalize the equipment manufacturing industry, with special emphasis on supporting the development of general basic manufacturing. China is facing the transition from the agricultural era to the industrial era, which will greatly increase the industrial demand for valve products. The support of national policy and the huge demand of product market will be the powerful power for the rapid development of valve industry.
