Model Meaning

Product Introduction
KCB gear pump is suitable for conveying various lubricating liquids, with a temperature not exceeding 70 ℃. If a high temperature of 200 ℃ is required, contact our unit and use high-temperature resistant materials with a viscosity of 5 × 10-5~1.5 × 10-3m2/S. This pump is not suitable for conveying corrosive, hard particle or fiber containing, highly volatile or lightning low liquids, such as gasoline, benzene, etc.
KCB gear pumps are widely used in chemical, petroleum, metallurgical, light industry, synthetic fiber, environmental protection, food, pharmaceutical and other sectors.

Usage Instructions
1. KCB gear pumps are suitable for transporting various oils, such as heavy oil, diesel, and lubricating oil. When paired with copper gears, they can transport low point liquids such as gas oil and benzene. Our unit also produces stainless steel gear pumps that can transport beverages and corrosive liquids.
2. KCB gear pump is not suitable for those containing hard particles or fibers, and is suitable for viscosity of 5 * 10-5~1.5 * 103m2/s. The temperature is not high at 70 ℃. If you need to transport high-temperature liquids, please use a high-temperature resistant gear pump, which can transport liquids below 300 ℃.

performance parameters

working principle
The KCB gear pump is equipped with a pair of rotating gears in the pump body, one active and one passive, which rely on the mutual meshing of the two gears to divide the entire working chamber inside the pump into two independent parts. A is the suction chamber, and B is the discharge chamber. When the pump rotates, the active gear drives the passive gear to rotate. When the teeth shift from meshing to disengagement, a local vacuum is formed on the suction side (A), and the liquid is sucked in. The liquid sucked in fills the various tooth valleys of the gear and is carried to the discharge side (B). When the gear enters meshing, the liquid is squeezed out, forming high-pressure liquid and discharged outside the pump through the discharge port of the pump.

structural characteristics
1. Structure
1. KCB gear pump is a horizontal rotary pump, mainly composed of pump body, gear, bearing seat, safety valve, bearing and sealing device and other components.
2. The pump body, bearing seat, etc. are made of gray cast iron parts, and the gears are made of high-quality carbon steel. They can also be made of copper or stainless steel materials according to the special needs of users.
3. There is a packing chamber on the bearing seat, which plays an axial sealing role. 2CY100/3,2CY120/3,2CY150/3, KCB-300~960 pumps use skeleton sealing devices. The bearing adopts a single row radial ball bearing. KCB-18.3-83.3 pumps are composed of three oil resistant rubber rings and a retaining ring with a middle lining. The sealing degree is adjusted by adjusting the two nuts on the compression cover, and the bearings are copper based powder oil containing bearings. In addition, this series of pumps can all use flexible graphite with good elasticity, high and low temperature resistance, stable chemical properties, and self-lubricating properties as packing for sealing.
4. The pump is equipped with a safety valve. When the pump or discharge pipeline malfunctions or the discharge valve is accidentally completely closed, resulting in high pressure and high pressure shock, the safety valve will automatically open to discharge some or all of the high-pressure liquid back to the low-pressure chamber, thereby providing safety protection for the pump and pipeline.
5. Connect the drive motor directly with an elastic coupling and install it on a common cast iron chassis.
2. Characteristics
1. KCB gear pump has a simple and compact structure, making it easy to use and maintain.
2. KCB gear pumps have good self-priming properties, which means that no liquid needs to be injected before each pump start.
3. The lubrication of KCB gear pump is automatically achieved by the conveyed liquid, so there is no need to add lubricating fluid during daily operation.
4. The use of elastic couplings to transmit power can compensate for minor deviations caused during installation. When subjected to inevitable hydraulic impact during pump operation, it can provide improved buffering effect

Precautions
（1） Installation
1. Before installation, it is necessary to check whether the pump has been damaged during transportation, such as whether the motor has been affected by moisture, whether the dust covers at the pump inlet and outlet are damaged, and whether dirt has entered the pump chamber.
2. Before installing the pipeline, the inner wall of the pipeline should be cleaned with clean water or steam. During installation, the weight of the pipeline should be avoided from being borne by the pump to avoid affecting the accuracy of the pump.
3. The various connection parts of the pipeline must leak air or liquid, otherwise there will be a phenomenon of not being able to suck up the liquid.
4. To prevent particles, impurities, and other contaminants from entering the pump, a metal filter screen should be installed at the suction inlet.
（2） Inspection before pump operation
1. Are the fasteners of the pump secure.
2. Whether the active shaft operates flexibly.
3. Is the valve of the inlet and outlet pipeline open.
4. Whether the rotation direction of the pump meets the requirements (if viewed from the pump end towards the motor, the rotation direction is counterclockwise).
（3） Maintenance during pump operation
1. The pressure of the pump and the reading of the vacuum gauge should comply with the technical specifications specified for the pump.
2. Pay attention to the operation of the stuffing box. If there is a leak, tighten the clamping cover according to its degree (do not tighten it too tightly to avoid severe heating of the stuffing box and rapid wear of the sealing ring).
3. When there is abnormal noise or high temperature rise during the operation of the pump, the pump should be stopped immediately and disassembled for inspection.
4. In general, safety valves should not be adjusted arbitrarily. If adjustment is necessary, instruments should be used for calibration.
The sealing pressure of the safety valve is 1.7MPa for KCB-18.3 and KCB-33.3 types, and 0.45MPa for KCB-55, KCB-83.3, KCB-300, and KCB-483.3 types. KCB200、 The three types of pumps are 0. 45MPa、0.8MPa、1.4MPa、2CYl00／3,2CY120／3,2CY150／7, They are 0.45MPa and 0.8MPa respectively.
（4） The pump stops working at the designated location
1. Cut off the power supply
2. Close the inlet and outlet pipeline valves

Faults and troubleshooting methods