Axial flow pump concept

The use of impeller rotation on the water thrust (lift) work, is a large flow low-lift pump, vertical, horizontal, inclined and tubular flow several. China has successively developed 664 sets of large-scale axial flow pumps since 1961. The specific rotational speed n is 500, 700, 850, 1000, 1250, 1400, 1600 and so on. The diameters of the wheels are 1.6m, 2.0m, 2.8m, 3.0m, 3.1m, 4.0m and 4.5m. There are 114 large-scale axial-flow pump stations built in 16 provinces, cities and districts in Jiangsu, Hubei, Hunan, Anhui, Guangdong, Tianjin, Shandong, Shanxi, Shaanxi and Xinjiang, with a total installed capacity of 630,000 kW. Japan, the Soviet Union, the Netherlands, Germany and other countries, the development of high-level axial pump. Japan's Nikko River pumping station axial flow pump, diameter 4.6m, flow 50m3 / s, lift 5m, speed 95r / min, supporting power 4260kW, efficiency 90%, is the world's largest axial flow pump.

Residential Sectional Garage Door

A typical version of an overhead garage door used in the past would have been built as a one-piece panel.The panel was mounted on each side with unequal parallelogram style hinge lifting mechanism. Newer versions of overhead garage doors are now generally built from several panels hinged together that roll along a system of tracks guided by rollers. The door is balanced by either a torsion spring system or a pair of extension springs.A remote controlled motorized mechanism for opening garage doors adds convenience, safety, and security

• Aluminum garage doors are low-cost, light, rust-proof, and feature low-maintenance. They are prone to denting because aluminum is not strong and they are energy-inefficient since aluminum is a highly conductivematerial.

• Fiberglass and vinyl garage doors are composite units, combining a steel core behind a fiberglass or vinyl skin. They have also polyurethane insulated base sections, or other type of foam insulation. These premium doors can match steel garage doors, and be a realistic imitation of wood (namely fiberglass units), but they may be more expensive than steel units.

• Steel doors have become common and are available in a variety of sizes and styles, provide strength and security, are cost-competitive, and may have optional insulating value. Extra strength is available with two or three layers of galvanized steel with a low gauge number (23-24 gauge steel panels).

• Wood garage doors offer aesthetic appeal, but they are high-maintenance and may be expensive. Low-priced wood garage doors may warp and break easily.

Residential Sectional Garage Door,Automatic Metal Sectional Garage Door,Standard Lift Garage Door Drum,Polyurethane Foam Garage Door

Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.highspeedshutterdoor.com