There are many factors when choosing a fire pump. First, the process is the first factor to be considered. The process also needs to be combined with the water supply and drainage requirements. The factors that should be considered in the selection of the fire pump include: Liquid delivery , Device lift, liquid properties, piping layout, operating conditions. At the same time according to the actual production and work related data to determine whether the application requirements. Then the actual purchase is the selection of fire pump knowledge what? Selection of fire pump knowledge 1, fire pump flow and lift should be based on the project services to the fire water and water pressure requirements are determined by calculation. 2, the selected fire pump should be the national fire product quality supervision and inspection agencies type test, and in line with "fire pump" GB6245-2006 requirements. 3, according to the characteristics of the project, the power supply and fire pump room location, area and fire water supply system, the specific circumstances of choice, to determine the type of fire pump. 4, the temporary high-pressure or stable high-pressure fire water supply system fire pump should be used one by one or prepared by a multi-purpose operating mode. The spare pump should be the same as the working pump, and the working capacity should not be less than one of the largest fire pumps in service. When the multi-use a prepared, should consider the pump flow superposition, the impact on the pump outlet pressure. 5, according to "Building Design Code of Fire Protection" (GB 50016--2006) provides: fire pumps should be set aside pump, its ability to work should not be less than the maximum of a fire pump. Spare pumps may not be provided when the outdoor fire fighting water volume at factories, warehouses, yard and storage tanks is less than or equal to 25 L / s or less than 10 L / s in buildings. Fire pumps should be guaranteed within 30 seconds after the start of the fire. Fire pumps and power machinery should be connected directly. 6, fire pump motor shaft power should meet the pump operating conditions (pump curve) work requirements. The pump performance curve without hump, fire pump stop pump pressure should not exceed 140% of the system design rated pressure, when the pump flow rate of 150% of rated flow, then the pump pressure should not be less than 65% of rated pressure . The use of many devices can not play out the value of the device's functionality is because many people just a superficial understanding of some of the basic equipment, but the right type of product is unknown. For example, fire pumps, fire pumps require much higher than the use of domestic water pumps and production requirements, because it not only need to meet the fire extinguishing pressure on the water, but also need to meet the water requirements. If the use of fire fighting because of the less than the appropriate requirements, resulting in unnecessary losses, it is not reasonable.
Angle Valves
Globe Valves and angle valves are designed for throttling or regulating flow in commercial and industrial applications. Bronze, cast iron, or cast ductile iron materials. Threaded, flanged, or solder end connections.
Angle valves for use in commercial and industrial applications. Typical services include hot and cold water, HVAC, steam, compressed air, gas and other general utility services.
Vacuum angle valve is used for turn on or shut off the airflow in the vacuum pipeline, the applicable media is air and non-corrosive gases.
It has two structures, one is angle type and another is a 3-way type within an ISO-KF or ISO-F various flange end pre-pump port.
a) Small diameter (≤DN50) valve body are precision investment casting.
b) Large diameter (> DN50) valve body are molding shaped seamless steel or steel plate.
c) Bellows sealed structure can withstand 150ºCtemperature, metal sealed structure can withstand 450ºCtemperature.
d) Can install on any position to control the airflow in the vacuum pipeline, as an on-off valve purpose
Angle Valves, Angle Globe Valves, Brass Angle Valve, Zinc Angle Valve
ZHEJIANG KINGSIR VALVE CO., LTD. , https://www.kingsirvalves.com