Wearing jade taboos Those who wear and collect jadeite should be careful not to collide and drop the jade pieces. Sometimes the surface looks like no damage, but in fact, after the collision, the internal structure of the jade has been damaged, and the dark lines are produced. Jade is very jealous of oily greasy. If it is a high-end goods that preserves value, it is not good to wear it into the kitchen to cook. Jade is also not suitable for close to high temperatures, but not for a long time. Because of this long-term, it is easy to produce physical changes and lose luster, not so fresh. Jadeite should not be exposed to strong acid solutions, which would destroy the structure and color of the jadeite. The valve assembly includes Valve Body, valve cap, valve rubber, Valve Seat, righting support, and valve spring. Valve Body And Seat are made of alloy steel, heat-treated strictly, with high facial hardness and good internal tenacity, anti-fatigue, impact resistance, and tight angle matching. The valve rubber is made of wear-resistance material, such as oil-proof rubber and epoxy resin. There are all kinds of specifications and types such as SH300 vehicle, AC-400B, 400C, ACF-700B, 350 type 35-15, international vehicle, 70-265 pump, 1000 type mud pump. Valve Body,Valve Seat,Control Valve Body,Valve Body And Seat HEBEI BAOSHI SPECIAL FLEXIBLE RUBBER CHEMICAL INDUSTRY CO., LTD. , http://www.hbbaoshihose.com