Agricultural irrigation pump agricultural irrigation is a strong guarantee of normal production, the market is also a wide range of agricultural pumps, small series to tell you that agricultural irrigation pump selection should pay attention to what the problem. Agricultural irrigation pump selection of agricultural pumps according to the specific circumstances for a specific analysis, the main consideration of pump flow and pump head. First of all, should start from the following four principles: 1, the choice of pumps should meet the flow and lift requirements; 2, the pump unit in the long run, the highest point of the pump efficiency; 3, the pump selection should be selected by the pump Model and number of units designed pump station, equipment and civil construction requires minimal investment; 4, the choice of pump should be easy to operate and maintain, management costs less. The choice of agricultural pumps to determine the flow: flow = (total farm water + channel loss of water) / pump work time The amount of farmland water is difficult to generalize, according to the actual situation and farmers experience to decide. The total farmland water demand is equal to the product of farmland area and irrigation depth. Water flows through the channels, the amount of water loss channels also with many factors. The general loss of the pump is between 5% and 25% of the farmland water requirement. Pump working time can be determined according to actual needs. The choice of agricultural pumps to determine the lift: the actual lift can be measured on the spot, that is, from the water source to the channel surface water or farmland surface vertical é«™ degrees. If it is rivers and lakes, water surface should be dry when the water level as the standard. Pump selection In determining the head, but also consider the installation of the pump height. The maximum installation of the pump é«™ = water pump to allow the suction height - water absorption Head suction loss of water pump head, generally not on the caliber (8 inches below) pumps, suction pipe and not too long, according to experience, when the valve with water loss Head is about 2 meters, without bottom valve when the suction head lift close to 1 meter. Choice of agricultural water pump: After confirming the flow and lift, according to the performance of the pump, it can be compared with the matching power, efficiency, transmission and economic conditions to determine the appropriate pump type and model. The choice of agricultural water pump type: Centrifugal pump flow is small, high head, suitable for more than 10 meters actual lift; Axial flow pump, lift low, applicable to the actual head of less than 4 meters; Francis pump between centrifugal pump and axial pump Between, for 5 to 10 meters head. Selection of agricultural pumps Model: Pump selection flow and head should be with the above-mentioned to determine the flow and determine the basic lift, and should be the most efficient, shaft power minimum. Further Reading: pump valve pipe fittings Exhibition Water Expo Xiamen exhibition of marine equipment Internet + Forum Yiwu Fair 2016 exhibition mold top ten brands of the Internet information industry (Xiamen) Technology Co., Ltd. Author: Asian pumps Network Editor: Yao Xiaoxia (QQ / WeChat:) http://beng.liuti.cn/ (Service Hotline:)
Elevator Display
Display Board
We are manufacturer of elevator display boards. We can provide you with a variety of elevator display boards. Including the following different styles:
1. No-display hall call board
2. Dot-matrix display board
3. Segment display board
4. True color display board
5. Picture display
6. Multimedia display
Below I will list the pictures and features of some popular styles for your reference.
Red dot-matrix display board for elevators
1. Dimensions: 130 mm x 72 mm x 5.7 mm
2. Ultra-thin design, energy-saving mode, shimmering breathing light for buttons, abundant functions, timesaving installation, and convenient use and maintenance.
3. High scanning frequency make the screen flash cannot be detected by human eyes, ensuring a high level of comfort.
4. No screen breaking risk and low maintenance cost.
5. Various floor settings, saving commissioning time.
6. Quick query of elevator faults, making on-site maintenance more convenient
7. Dustproof, moistureproof, smokeproof, corrosion-resistant, and strike-resistant, improving product's durability
8. Diverse interaction selection and 3-digit display
9. D6xx and R6xx series display boards:
Car addresses: 0 (encryption certification), D2, D3 or D4
Hall addresses: 1–56 or DH (for hall display)
4.3 inch segment LCD display
Features and advantages:
1. Operating ambient temperature: -10℃ to +40℃
2. Ultra-thin design, with a 38% reduction in thickness compared with U1 products
3. Dustproof, moistureproof, smokeproof, corrosion-resistant, strike-resistant, and antistatic
4. Equipped with LCD protection corners, reducing the risk of screen breaking
5. Support of 3-digit display, energy-saving mode, and shimmering breathing light for buttons
6. Abundant functions, time-saving installation, and convenient use and maintenance
7. U673 series display board:
Car addresses: 0 (encryption certification), D2, D3 or D4
Hall addresses:1–56 or DH (for hall display)
Hall addresses: 1–56 or DH (for hall display)
Elevator Display,Elevator Lcd Display,Elevator Display Screens,Elevator Display Panel
Suzhou Keffran Parts Co.,ltd , https://www.keffran-elevatorsmart.com