It is applied to the dismantling bales of various wrapped scrap-metal, plastic, waste paper and so on. It is suitable for the dismantling and inspection of recycle bag pieces of steel mills and the dismantling of imported large bag pieces. Gripper stroke can be customized according to the customers' requirements in order to completely dismantle the bag pieces. Bale Breaker, Bale Dismantle Machine, Bale Opener, Bale Squeezer, Unpacking Machine, Block Dismantle Machine Jiangyin Metallurgy Hydraulic Machinery Factory , https://www.yjhydraulicn.com
2, installation, maintenance convenience: vertical pipeline structure, the pump's import and export can be installed like a valve in any location and any direction of the pipeline, installation and maintenance is extremely convenient.
3, smooth operation, safe and reliable: the motor shaft and the water pump shaft for the coaxial direct connection, high concentricity, smooth operation, safe and reliable.
4, stainless steel sleeve: shaft sealing position is relatively easy to be rusted, once the direct coupling pump shaft rust, easy to cause mechanical seal failure. STG pump is equipped with inserting stainless steel sleeve here to avoid rust, increase shaft life and reduce operation and maintenance costs.
5. Bearing: In the motor equipped with the pump, Y (Y2) 280 shaft extension bearing (including Y180 following blade end bearing) adopts closed bearing. When it is used normally, maintenance of motor bearing is avoided.
6, mechanical seal: mechanical seal base generally use rubber bellows structure, the traditional mechanical seal in the shaft seal from the O-ring of the line seal to the two surfaces of the rubber seal, when the clean water medium to improve the sealing effect. 
When using a single-stage fire pump, care should be taken to protect the shaft from the shaft through the packing cavity to avoid shaft wear. There is an O-ring between the sleeve and the shaft to prevent air intake or leakage along the mating surface.
Single-stage fire pump features and precautions Single-stage fire pump transmission mode Pump transmission mode is through the extension of the flexible coupling and the motor connection, the direction of rotation of the pump, from the drive end, clockwise rotation.
The purpose of a single-stage fire pump is mainly applicable to industrial and agricultural and urban, drainage, fire water supply and so on.
Key installation techniques for fire pumps The key to the installation of fire pumps is to determine the height of the fire pump installation, ie suction. This height refers to the vertical distance from the source water surface to the centerline of the pump impeller. It cannot be confused with the allowable suction height. The vacuum height allowed on the water pump product specification or nameplate indicates the vacuum value at the inlet section of the pump. In addition, the test was performed under the conditions of a standard atmospheric pressure and a water temperature of 20°C. It does not take into account the flow conditions of the suction piping. The installation height of the pump should be the value of the part left after allowing the vacuum height to be deducted after the loss of the suction line of the suction pipe. It should overcome the actual topographic suction height. The installation height of the pump cannot exceed the calculated value. Otherwise, the fire pump will not be able to pump water. In addition, the size of the influential calculated value is the resistance loss head of the suction pipe. Therefore, the shortest pipe layout should be adopted, and fittings such as the elbow should be installed as small as possible, and some water pipes with appropriate diameters can also be considered to reduce the flow rate in the pipe.
It should be noted that when the elevation of the fire pump installation site and the water temperature are different from the test conditions, if the local elevation is more than 300 meters or the pumped water temperature exceeds 20 degrees Celsius, the calculated value shall be corrected. That is, the atmospheric pressure at different elevations and the saturation vapor pressure above the water temperature of 20°C. However, when the water temperature is below 20°C, the saturated steam pressure is negligible.
From the pipe installation technology, the suction pipe requires a strict seal, can not leak, leak, otherwise it will destroy the vacuum level at the fire pump inlet, so that the fire pump to reduce the amount of water, even in serious water can not pump. Therefore, we must do a good job in the interface of the pipeline to ensure the construction quality of the pipeline connection.
Single-stage fire pump features and precautions for use
1. High-efficiency and energy-saving: CFD computational fluid dynamics is used to analyze and calculate the relationship between pressure distribution and velocity distribution in the pump and optimize the flow path design of the pump to ensure that the pump has an efficient hydraulic shape and improves the efficiency of the pump.