Introduction to various models of electric pressure testing pumps from Raoyang Hongyuan Machinery Factory
Introduction of various models of electric pressure testing pumps from manufacturers
The careful installation and construction of the equipment is one of the important steps to ensure the long-term trouble-free operation of the equipment. In addition to the high-pressure part of the hydraulic end being equipped with a safety valve (the safety valve is mainly used to prevent excessive pressure in the hydraulic system, which can cause the pressure testing pump to operate under overpressure), sufficient attention should also be paid to the safety protection devices required during the operation, maintenance, and inspection of the equipment in the future (such as handrails, brackets, protective covers, etc.) to avoid unnecessary personal injury accidents.
It is recommended that the safety protection devices be interlocked with the equipment's safety alarm devices whenever possible. If any situation occurs that affects operation or poses a danger to personal safety, the power of the equipment will be cut off, forcing the operation to stop. Power and supply can only be restored after the protective devices and safety devices are repaired, allowing the electric pressure testing pump to resume operation.
There are several types of pressure transmitters for pressure testing pumps:
One type is when the pressure of the electric pressure testing pump rises, but the transmitter output does not rise. In this case, first check whether the pressure interface is leaking or blocked. If confirmed not to be the case, check the wiring method and the power supply. If the power supply is normal, perform a simple pressurization to see if the output changes, or check whether there is output at the sensor's zero position. If there is no change, the sensor is damaged, which may be due to instrument damage or issues in other parts of the entire system.
The second type is when the output of the pressure testing pump's pressure transmitter does not change, and then the output of the pressure transmitter suddenly changes, while the zero position of the pressure relief transmitter cannot return. This is likely due to a problem with the sealing ring of the pressure sensor. Commonly, due to the specification of the sealing ring, after the sensor is tightened, the sealing ring is compressed into the sensor's pressure port, blocking the sensor. During pressurization, the pressure medium cannot enter, but when the pressure is high, the sealing ring suddenly bursts open, causing the pressure sensor to change due to pressure. The best way to eliminate this fault is to remove the sensor and directly check whether the zero position is normal. If the zero position is normal, replace the sealing ring and try again.
The third type is when the output signal of the transmitter is unstable. This fault may be due to the pressure source of the electric pressure testing pump in the pipeline. The pressure source itself is an unstable pressure, which may be due to the instrument or pressure sensor's weak anti-interference ability, severe vibration of the sensor itself, or sensor failure. The fourth type is when there is a large deviation between the transmitter and the dial pressure gauge. A deviation is a normal phenomenon, and it is sufficient to confirm the normal deviation range.
The fourth common fault is the impact of the installation position of the differential pressure transmitter on the zero position output. Due to its small measurement range, the sensing element in the differential pressure transmitter can affect the output of the differential pressure transmitter. When installing, the pressure-sensitive element of the transmitter should be oriented axially perpendicular to the direction of gravity. After installation, adjust the zero position of the transmitter to the standard value.
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