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1. Tianxin Turbine Flow Meter Refueling Standard
Tianxin Turbine Flow Meter Refueling Standard Core Points: Regularly add special lubricating oil according to the model and environment, adding 1/3 cup for DN50, 2/3 cup for DN80-DN100, and filling up for DN150 and above, usually once every 1-3 months. 1. Refueling cycle - Generally, refueling is done once every 1-3 months, which needs to be adjusted according to the actual working environment, instrument model, and gas transmission volume. For low-pressure environments such as urban pipelines, refueling can be done every 3 months. The need for refueling can be determined by listening to the sound of instrument operation (if there is abnormal noise) Refueling method - Need to refuel when the gas is stopped or the flow rate is low peak - Quantitative refueling by model: - DN50 type: Add to 1/3 of the refueling cup - DN80-DN100 type: Add to 2/3 of the refueling cup - DN150-DN300 and above: Fill the entire refueling cup - When operating, press down on the manual rod of the oil pump for 4 strokes (each time to form the same oil pressure) 3 Lubricating oil selection - it is necessary to choose lubricating oil with good chemical stability and compatibility with internal materials. Silicone oil: suitable for environments with large temperature changes and high precision requirements. Special instrument oil: specially developed for instrument equipment, suitable for detailed structures Refueling position - usually at the oil filling hole around the bearing or moving parts - there is a dedicated oil filling hole on the head or side of the main body Attention - The oil filling hole cover should be securely fastened to prevent water ingress - The oil injection amount shoul
2. Advantages and disadvantages of the Venturi flow meter
The Venturi flow meter is a high-precision, low pressure loss differential pressure flow measurement device, and the core advantages and disadvantages of the Shimin are compared as follows:
1 Advantages: High measurement accuracy: the error can be controlled within ± 1% under standard operating conditions, suitable for industrial measurement scenarios with high precision requirements. Small pressure loss: compared with orifice flow meters, it can reduce pressure loss by 40% -80%, significantly saving fluid transportation energy consumption. Strong structural reliability: the design without moving parts allows the service life to reach more than 10 years, and the maintenance cycle is extended by 50% compared to other differential pressure flow meters. Wide medium adaptability: it can measure liquids with viscosity range of 0.3-300cP, gases with working pressure below 10MPa, and saturated steam Disadvantages • Strict installation conditions: the length of the front straight pipe section is required to be ≥ 10D (pipe diameter), and the length of the rear straight pipe section is required to be ≥ 5D, with poor applicability in limited space scenarios • High initial cost: the cost of DN500 caliber and above can be 3-5 times that of the orifice flow meter, and it needs to be matched with a differential pressure transmitter • Difficult maintenance: measuring the thickness of the