CLH Marine Vertical Centrifugal Pump

Description:

Because of CLH type fire pump product characteristic, it is  is used as various ship ballast pump, bilge pump, drainage pump, cooling pump, fire pump, and is also suitable for the petrochemical pipe City, high-rise building water and circulation system of the booster pump. And CLH type fire pump which transmits fluid temperature not exceeding 75℃ is in accordance with ISO international standards and the design of a single stage, single suction, level inlet and outlet of the centrifugal pump. And its motor shaft and pump shaft flange connection is convenient to disassemble.

Features

1. The pump has compact structure, small volume and beautiful appearance. Its vertical structure has a low center of gravity and the center of gravity in the center of the lower half of the pump, which enhances the running stability and life of the pump.

2. Easy to install. The inlet and outlet diameters are the same and are on the same centerline, which can be directly installed in any part of the pipeline like a valve. The motor and rain cover can be used outdoors. The pump is provided with mounting feet for stable installation of the pump.

3. Smooth operation, low noise and high concentricity of components. The motor adopts low-noise bearings, and is equipped with a non-stop refueling device. The pump impeller has excellent dynamic and static balance, no vibration during operation, and improves the use environment.

4. No leakage. The shaft seal adopts corrosion-resistant hard alloy mechanical seal, which solves the problem of serious leakage of the packing seal of the centrifugal pump, prolongs the service life, and ensures the clean and tidy operating site.

5. Easy to maintain. There is no need to disassemble the pipeline, just remove the pump cover nut, take out the rotor and the transmission components for maintenance.

6. The pump can be installed vertically, horizontally or in multiple ways according to the on-site use conditions. According to the flow and lift requirements, the parallel and series methods are adopted to increase the required flow and lift.

Working principle

Before starting the centrifugal pump, the pump casing and the suction pipe should be filled with liquid. After starting the motor, the pump shaft drives the impeller and the liquid to rotate at a high speed. The flow channel flows into the pressurized water line of the pump. At the center of the pump impeller, as the liquid is thrown out under the action of centrifugal force, a vacuum is formed, and the water in the suction pool is pressed into the pump casing under the action of atmospheric pressure, and the impeller rotates continuously to make the liquid in the impeller. Under the action of continuous inflow and outflow, the purpose of transporting liquid is achieved.

Precautions for use

1. The maximum working pressure of the pump and the connected pipeline is ≤1.6MPa, and the pressure at the suction port of the pump + the pump head is ≤1.6Mpa. (If the working pressure of the pump system is greater than 1.6MPa, it should be put forward separately when ordering, so that we can use cast steel for the over-current parts and connecting parts of the pump during manufacture).

2. The ambient temperature does not exceed 50°C, the altitude does not exceed 1000 meters, and the relative humidity does not exceed 95%.

3. The conveying medium is clear water or other liquids with similar physical and chemical properties to clear water. (The conveying medium contains fine particles, which should be specified separately when ordering, so that we can assemble the wear-resistant mechanical seal.)

4. Before installing the pump, carefully check whether there are hard objects (such as stones, iron particles, etc.) in the pump flow channel that affect the operation of the pump, so as to avoid damage to the impeller and pump body when the pump is running.

5. The weight of the pipeline should not be added to the pump during installation, and there should be their own support bodies to avoid the deformation of the pump and affect the running performance and life.

6. The anchor bolts must be tightened during installation to avoid the impact of vibration on the pump performance during startup.

7. For the convenience of maintenance and safe use, a regulating valve is installed on the inlet and outlet pipelines of the pump and a pressure gauge is installed near the pump outlet to ensure the operation within the rated head and flow range, to ensure the normal operation of the pump and the growth of the pump. service life of the pump.

8. After installation, turn the pump shaft, the impeller should have no friction noise or stuck phenomenon, otherwise the pump should be disassembled to check the cause.

Model Explanation:

Picture of CLH Marine Vertical Centrifugal Pump	Explanation detail-CLH (R, H, B, BH)D、50-160 (I) A(B, C)
	CLH—Marine vertical sea water pump
	R/H/B/BH—Hot-water pump/Chemical pump/Oil pump/Non-explosive chemical pump
	D—Slow Speed of revolution
	50—Inlet and outlet diameter 50 mm
	160—Nominal diameter of impeller 160mm
	I—Flow classification
	A(B, C)—Impeller processed with 1(2, 3)cutting
	CLH—Marine vertical sea water pump

The advantage of CLH Marine Vertical Centrifugal Pump:

Parameter of CLH Marine Vertical Centrifugal Pump:

(In addition, please provide the parameter of the marine pump you need and we can customize the suitable type for you.)

Photo of CLH Marine Vertical Centrifugal Pump：

Maintenance and Disassembly

The characteristics of the pump are simple and reliable structure, durable. Under normal conditions, the pump generally does not need to be disassembled and maintained frequently. When a fault is found, it can be eliminated at any time.

1. Pay attention to several main parts when maintaining the pump.

A. Rolling bearings: After the pump has been running for a long time, the bearings must be replaced when they are worn to a certain extent.

B. Front sealing ring and rear sealing ring: When the sealing ring is worn to a certain extent, it must be replaced.

C. Mechanical seal: Generally, the mechanical seal should not be disassembled for inspection if there is no leakage. If serious leakage occurs at the leakage port at the lower end of the bearing body, the mechanical seal should be dismantled and inspected. When assembling and disassembling the mechanical seal, it must be handled with care, pay attention to the cleaning of the mating surface, protect the mirror surface of the static ring and the moving ring, and it is strictly forbidden to knock and collide. The main reason for the leakage due to the mechanical seal is that the mirror surface of the friction pair is brushed. The repair method is to grind the end face of the friction pair to restore the mirror surface. Another reason for the leakage of mechanical seals is that the "o"-shaped rubber sealing ring (or cushion) is improperly installed, or deformed and aged. At this time, it is necessary to adjust or replace the "o" ring seal for reassembly.

2. Disassembly sequence of oil pump:

A. Remove the motor or disengage the coupling.

B. Remove the bearing body assembly, check the radial clearance between the impeller and the front port ring, and check whether the impeller nut is loose.

C. Remove the impeller nut, pull out the impeller, and check the radial clearance between the impeller and the rear seal ring.

D. Loosen the set screw of the mechanical seal, pull out the moving ring part of the mechanical seal, check the fit of the end faces of the dynamic and static rings, and check the sealing condition of the "o"-shaped sealing ring (or cushion).

E. Unscrew the set nut of the coupling and pull out the coupling.

F. Remove the bearing cover and remove the pump shaft and bearing.

G. Assembly can be done in reverse order during installation.

Troubleshooting