The electric ball valve is generally designed for connecting pipes with smaller diameter, which is convenient and fast. Like other electric ball valves, different valve materials are selected for different media, including natural valves, styrene butadiene environment, butyronitrile, butyl, etc., which have excellent performance in heat resistance, acid resistance, corrosion resistance, etc. Electric ball valves have many other advantages. The utility model has the advantages of convenient installation, easy replacement, high pressure resistance, light weight, etc.
Elbow expansion joint is an expansion joint that bends the pipe into a U shape or other shape (Figure 1 [Elbow expansion joint]) and compensates with the elastic deformation capacity of the shape. It has the advantages of good strength, long service life, and can be made on site. Its disadvantages are that it occupies large space, consumes more steel and has large friction resistance. This expansion joint is widely used in various steam pipelines and long pipelines. Electric ball valve is also called valve electric ball valve, flexible electric ball valve, flexible electric ball valve, valve shock absorber, etc. The product is mainly composed of tubular valve parts composed of inner and outer rubber layers, cord layers and steel wire rings, which are vulcanized at high temperature and high pressure and then combined with metal flange loose sleeves. It is widely used in fire protection, chemical industry, pump valve and other pipeline systems, playing the role of earthquake resistance and noise reduction, and absorbing the displacement generated during pipeline operation. Electric ball valve is a hollow valve product used for flexible connection between metal pipes. Electric ball valve is also called valve pipe electric ball valve, flexible electric ball valve, valve electric ball valve, flexible electric ball valve, high pressure electric ball valve, valve shock absorber, etc. It is a pipe joint with high elasticity, high air tightness, medium resistance and weather resistance.
This product takes advantage of the elasticity, high air tightness, medium resistance, weather resistance and radiation resistance of the valve. It is made of polyester cord fabric with high strength and strong cold and hot stability, which is compounded diagonally with it, and then vulcanized by high-pressure and high-temperature molds. It is widely used in various pipeline systems. Classified according to the external form: single ball electric ball valve, double ball electric ball valve, three ball electric ball valve, concentric reducing electric ball valve, eccentric reducing electric ball valve, clamp type electric ball valve, 90 ° valve elbow, etc.
Classification according to the medium used: general (ordinary) electric ball valve, high temperature resistant electric ball valve, acid and alkali resistant electric ball valve, wear-resistant electric ball valve, desulfurization special electric ball valve, etc. Classification according to working pressure: 0.25Mpa, 0.6Mpa, 1.0Mpa, 1.6Mpa, 2.5Mpa, 4.0Mpa. Sealing requirements: 1. When the upstream surface is a corrosive medium, the gap can be sealed with sealing materials. See the waterproof casing atlas for the practice; Installation drawing of flexible waterproof sleeve (Type A). 2. Filler materials of flexible waterproof casing: asphalt hemp fiber, polystyrene board, PVC foam plastic board. 3. Sealing paste: polysulfide sealing paste, polyurethane sealing paste. 4. The dimensional tolerance and geometric tolerance of welding structure shall comply with JB/T5000.3-1998.