GC boiler feedwater multi-stage pump-Fornitore globale

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Modao Industrial Zone, Oubei Town, Yongjia, Wenzhou, Zhejiang Province

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GC boiler feedwater multi-stage pump

Brand: Quanda Pump Valve Address: Oubei Town, Yongjia County, Wenzhou City, Zhejiang Province Model: GC Boiler Feedwater Multi stage Pump Power: 3~100

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GC boiler feedwater multi-stage pump

Horizontal, single suction multi-stage, segmentedcentrifugal pumpIt has the characteristics of high efficiency, wide performance range, safe and stable operation, low noise, long service life, and easy installation and maintenance. Used for transporting clean water or other liquids with physical and chemical properties similar to water. All of our products are designed and optimized using computers. Our company has strong technical strength, rich production experience, and comprehensive testing methods to ensure stable and reliable product quality.

GC boiler feedwater multi-stage pumpscope of application

GC type horizontal boiler feedwaterMulti-stage pumpSuitable for industrial and urban water supply and drainage, high-rise building pressurized water supply, garden sprinkler irrigation, fire pressurization, long-distance water supply, heating, bathroom and other cold and warm water circulation pressurization and equipment matching, especially suitable for small boiler water supply.

GC boiler feedwater multi-stage pumpMarking method

GC boiler feedwater multi-stage pumpSelection parameters

model	internet traffic (mз/h）	Head lift （m）	rotational speed （r/min）	efficiency （%）	Power (KW)
model	internet traffic (mз/h）	Head lift （m）	rotational speed （r/min）	efficiency （%）	shaft power	Motor Power
1.5GC-5×2	6	46	2950	38	2	3
1.5GC-5×3	6	69	2950	38	3	4
1.5GC-5×4	6	92	2950	38	4	5.5
1.5GC-5×5	6	115	2950	38	5	7.5
1.5GC-5×6	6	138	2950	38	6	7.5
1.5GC-5×7	6	161	2950	38	7	7.5
1.5GC-5×8	6	184	2950	38	8	11
1.5GC-5×9	6	207	2950	38	9	11
2GC-5×2	10	64	2950	39.6	4.4	7.5
2GC-5×3	10	96	2950	39.6	6.6	11.0
2GC-5×4	10	128	2950	39.6	8.8	15.0
2GC-5×5	10	160	2950	39.6	11.0	15.0
2GC-5×6	10	192	2950	39.6	13.2	18.5
2GC-5×7	10	224	2950	39.6	15.4	22.0
2GC-5×8	10	256	2950	39.6	17.6	30.0
2GC-5×9	10	288	2950	39.6	19.8	30.0
2.5GC-6×2	15	62	2950	43.7	5.8	11.0
2.5GC-6×2	20	54	2950	47.4	6.2	11.0
2.5GC-6×3	15	93	2950	43.7	8.7	15.0
2.5GC-6×3	20	81	2950	47.4	9.3	15.0
2.5GC-6×4	15	124	2950	43.7	11.6	22.0
2.5GC-6×4	20	108	2950	47.4	12.4	22.0
2.5GC-6×5	15	155	2950	43.7	14.5	22.0
2.5GC-6×5	20	135	2950	47.4	15.5	22.0
2.5GC-6×6	15	186	2950	43.7	17.4	30.0
2.5GC-6×6	20	162	2950	47.4	18.6	30.0
2.5GC-6×7	15	217	2950	43.7	20.2	30.0
2.5GC-6×7	20	189	2950	47.4	21.7	30.0
2.5GC-6×8	15	248	2950	43.7	23.2	37.0
2.5GC-6×8	20	216	2950	47.4	24.8	37.0
2.5GC-6×9	15	279	2950	43.7	26.1	22
2.5GC-6×9	20	243	2950	47.4	27.9	22
4GC-8×2	30	86	2950	51	13.8	30
	45	82	2950	60	16.8	30
	55	76	2950	62.5	18.1	30
4GC-8×3	30	129	2950	51	20.7	37
	45	123	2950	60	25.2	37
	55	114	2950	62.5	27.2	37
4GC-8×4	30	172	2950	51	27.6	55
	45	164	2950	60	27.6	55
	55	152	2950	62.5	36.2	55
4GC-8×5	30	215	2950	51	34.5	55
	45	205	2950	60	42.0	55
	55	190	2950	62.5	45.3	55
4GC-8×6	30	258	2950	51	41.4	75
	45	246	2950	60	50.4	75
	55	228	2950	62.5	54.1	75
4GC-8×7	30	301	2950	51	48.2	75
	45	287	2950	60	58.8	75
	55	266	2950	62.5	63.4	75
4GC-8×8	30	344	2950	51	55.0	100
	45	328	2950	60	67.0	100
	55	304	2950	62.5	73.0	100
4GC-8×9	30	387	2950	51	62.0	100
	45	369	2950	60	75.5	100
	55	342	2950	62.5	82.0	100
4GC-8×10	30	430	2950	51	69.0	-
	45	410	2950	60	84.0	-
	55	380	2950	62.5	91.0	-

GC boiler feedwater multi-stage pumpStructural diagram analysis

1	Shaft sleeve nut	2	Bearing cap
3	bearing	4	Bearing body
5	Bearing A	6	Packing gland
7	Packing ring	8	Inlet section
9	Sealing ring	10	impeller
11	middle	12	Return pipe
13	Water outlet section	14	Keheng Environment
15	balance disc	16	TAIL CAP
17	Shaft sleeve B	18	Tension Bolt
19	axle	20	Garden nut

1. The GC type water pump is a multi-stage segmented design, with the inlet and outlet of the 1.5GC-4GC models located on the inlet and outlet sections respectively, all vertically upward. The head of the water pump can be increased or decreased according to usage needs. Whether the water pump is well assembled or not has a great impact on its performance, especially the relative position between the outlet of each impeller and the inlet of the guide vane. The center of the outlet of each suction impeller must be aligned with the center of the guide vane. Any slight deviation will reduce the flow rate, head, and efficiency of the water pump. Therefore, it is necessary to pay attention to assembly after maintenance, and adjust if there is any deviation.
The main components of GC type multi-stage centrifugal pump include shaft, shaft sleeve, inlet section, impeller, guide wing, sealing ring, middle section, outlet section, balance ring, balance plate, tail cover, inlet section, middle section, and outlet section cover, all of which are made of cast iron, forming the working chamber of the pump.
3. The impeller is made of cast iron and has blades inside. The liquid enters on one side along the axial direction. Due to the unequal pressure on the impeller before and after, there must be an axial force, which is borne by the balance plate. The impeller is manufactured through static balance testing.
4. The shaft is made of high-quality carbon steel, with an impeller installed in the middle, fixed on the shaft with keys, shaft sleeves, and shaft sleeve nuts. One end of the shaft is equipped with a coupling component and directly connected to the motor. When viewed from the direction of rotation, the pump shaft rotates clockwise.
5. The sealing ring is made of cast iron to prevent high-pressure water from leaking back into the inlet section of the water pump. It is fixed in the inlet and middle sections respectively and is a vulnerable part. After wear, it can be replaced with spare parts.
6. The balance ring is made of cast iron and fixed on the outlet section. It, together with the balance plate, forms the balance device. The balance plate is made of wear-resistant cast iron and is installed on the shaft, located between the 7th section and the tail cover, to balance axial forces. The shaft sleeve is made of cast iron and located at the two packing chambers, used to fix the impeller and protect the pump shaft. For vulnerable parts, they can be replaced with spare parts after wear and tear.
7. The bearing is a single row radial ball bearing lubricated with calcium based grease. The packing plays a sealing role, preventing air from entering and a large amount of liquid from leaking out.
8. The packing seal consists of a packing chamber on the inlet section and tail cover, a packing gland, a packing ring, and packing, etc. A small amount of high-pressure water flows into the packing chamber to provide a water seal. The tightness of the filler must be appropriate, neither too tight nor too loose, based on the liquid being able to seep out drop by drop. If the packing is too tight, the shaft sleeve is prone to heating and consuming power. The packing is too loose, which reduces the efficiency of the water pump due to liquid loss.

GC boiler feedwater multi-stage pumpOperating instructions

1. Loading and unloading sequence of GC type horizontal boiler feedwater multi-stage pump
1) Tightly install the sealing ring (9) onto the inlet section (8).
2) Insert the shaft sleeve A (5) and the key of the shaft (9) through the inlet section (8) and push it into the impeller (10). Place a paper pad on the middle section, install the middle section (11), and then push in the second impeller. Repeat the above steps to install all impellers and the middle section.
3) Install the balance ring (14) onto the outlet section (13).
4) Install the outlet section (13) onto the middle section, and then tighten the inlet section, middle section, and outlet section together with the tightening bolt (18).
5) Install the balance plate (15) and shaft sleeve (17).
6) Install the paper pad on the tail cover, install the tail cover on the outlet section, and sequentially install the packing and packing ring (7), packing cover (6) into the packing chamber of the inlet section and tail cover.
7) Install the bearing body (4) onto the inlet section and tail cover respectively, and tighten them with bolts.
8) Install the ball bearing (3) and tighten it with the shaft sleeve nut (1) and the round nut (20) respectively.
9) Add an appropriate amount of butter into the bearing body, and place a paper pad on the bearing cover (2). Install the bearing cover onto the bearing body and tighten it with screws.
10) Install the water return pipe, coupling components, and all square screw plugs.
11) Disassemble in reverse of the above steps.
Installation:
Preparation before installation:
1) Check the water pump and motor;
2) Prepare tools and lifting machinery;
3) Check the foundation of the machine;
2. Installation sequence
1) The entire set of water pumps has been transported to the site, and the electric motor with the base has been installed. When looking for a flat base, there is no need to remove the water pump and motor.
2) Place the base on the foundation, place wedge-shaped iron blocks near the anchor screws, raise the base by about 20-40 millimeters, and prepare to level it before filling it with cement.
3) Use a spirit level to check the horizontal bottom of the base, level it, then tighten the foot nuts and fill the base with cement.
4) After 3-4 days of cement solidification, check the water level again.
5) Clean and remove any dirt from the support surface of the base, water pump feet, and motor feet, and place the motor and water pump on the base.
6) Adjust the level of the pump shaft. After leveling, tighten the nuts appropriately to prevent movement. After adjustment, install the motor and place iron plates at uneven positions. Leave a certain gap between the pump and the coupling.
7) Place the level ruler on the coupling and check if the axis of the water pump and the axis of the motor coincide. If they do not coincide, place a thin iron sheet under the feet of the motor and pump to make the outer circles of the two couplings level with the level ruler. Then take out several thin iron sheets from the pads and replace them with a whole piece of flattened pad, and recheck the installation.
To check the accuracy of installation. Measure the gap between the two coupling planes using a feeler gauge at several opposite positions. The maximum and minimum gap difference on the coupling plane should not exceed 0.3 millimeters, and the difference between the center lines of the two ends should not exceed 0.1 millimeters.
3. Start and Stop:
1. Remove all the oil applied to the shaft and other oiled parts.
2. Clean the bearings and shaft chamber with gasoline and wipe them clean with cotton yarn.
3. Add calcium based butter into the bearing body.
4. Start the experiment. Start the motor, check the direction of rotation of the motor, and strictly prohibit the water pump from reversing to loosen the shaft sleeve nut.
5. Inject water into the pump or use a vacuum pump to draw water.
6. Close the valve and pressure gauge plug on the discharge pipe.
After the above process is completed, start the motor and open the pressure gauge plug.
When the water pump is running at normal speed, the pressure gauge displays the appropriate pressure, then open the vacuum gauge plug and gradually open the gate valve on the drainage pipeline until the required pressure is reached.
When stopping the water pump, slowly close the gate valve on the drainage pipeline and close the vacuum gauge plug. And stop the motor, then close the pressure gauge plug.
When the water pump is not used for a long time, it should be disassembled, the water in the other parts of the pump should be wiped dry, and rust proof oil should be applied to the sliding surface for proper storage.
work:
1. Pay attention to the temperature of the water pump bearings, which should not exceed the external temperature of 35 ℃. Its maximum temperature shall not exceed 75 ℃.
2. When the water pump is running, pay attention to refueling regularly.
3. The normal level of water leakage in the packing room should be 10-20 drops per minute, and the tightness of the packing gland should be adjusted at any time.
4. Regularly inspect the coupling and pay attention to checking the temperature rise of the motor bearings.
During operation, if there is any noise or abnormal sound, the vehicle should be stopped immediately to check the cause.

GC boiler feedwater multi-stage pumpSimple troubleshooting methods

Fault	Reason	solution
1. The GC type horizontal boiler feedwater multi-stage pump does not absorb water, and the pointers of the pressure gauge and vacuum gauge jump violently.	The water injected into the GC type horizontal boiler feedwater multi-stage pump is insufficient, resulting in water leakage from the pipes and instruments.	Inject more into the pump and tighten to block the leak.
2. The GC type horizontal boiler feedwater multi-stage pump does not absorb water, and the vacuum gauge indicates high vacuum.	The bottom valve is not open or has been blocked, the resistance of the suction pipe is too high, and the suction height is too high.	Correct or modify the condition of the bottom valve. Or change the suction pipe to lower the suction height.
3. The pressure gauge has pressure, but the water pump still does not produce water.	The resistance of the outlet pipe is too high, the rotation direction is incorrect, and the impeller is blocked. The water pump speed is not enough.	Check or shorten the water pipe and inspect the motor. Remove the water pipe joint, clean the impeller, and increase the speed of the water pump shaft.
4. The flow rate is lower than the design requirements.	The water pump is blocked. Excessive wear on the sealing ring. Insufficient rotation speed.	Clean the water pump and pipes, and replace the sealing ring. Increase the speed of the water pump shaft.
5. The power consumption of the GC type horizontal boiler feedwater multi-stage pump is too high.	The packing gland is too tight. The heating impeller of the stuffing box is worn. The water supply of the pump has increased.	Loosen the packing cap. Replace the impeller. Increase the resistance of the outlet pipe to reduce the flow rate.
6. The internal sound of the GC type horizontal boiler feedwater multi-stage pump is abnormal, and the water pump does not supply water.	The flow rate is too high, the resistance inside the suction pipe is too high, and there is air infiltration at the suction point. The temperature of the liquid being sucked is too high.	Increase the resistance inside the water outlet pipe to reduce the flow rate, and check the pump and water pipe. Check the bottom valve, reduce the suction height, block the leakage area, and lower the suction height.
7. Vibration of GC type horizontal boiler feedwater multi-stage pump.	The pump shaft and motor are not on the same centerline, or the pump bearing is bent.	Align the axis centerlines of the water pump and motor.
8. The bearing is overheated.	Without oil, the water pump and motor shaft are not on the same centerline.	come on. Align the axis centerline and inspect or clean the bearing body.

Please provide as much as possible for ordering:

1. Model 2. Diameter 3. Head (m) 4. Flow rate 5. Motor power (KW) 6. Speed (R/min) 7. Material without accessories 8. Voltage (V)

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