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Multistage horizontal boiler feed pump type GC

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Multistage pump

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Pump

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Multistage horizontal boiler feed pump type GC

Flow: 6-55m³/h

Lifting height: 46-430m

Power: 3-100kw

Efficiency: 38%-62.5%

Weight of the pump: 70-253kg

NPSH: 3.6-5.5m

Price: 0.18-5.98 ten thousand

The GC type pump is a horizontal centrifugal pump, with single suction, multistage, and segmented. It has characteristics of high efficiency, wide performance range, safe and stable operation, low noise, long service life, and easy installation and maintenance. It is used to transport clean water or other liquids with physical-chemical properties similar to water.

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info@cipump.com

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Product Description Product Specifications Why Choose Us? FAQ

Product description

　　The horizontal multistage boiler feed pump type GC is a horizontal centrifugal pump, with single suction and segmented multistage. It has features such as high efficiency, wide performance range, safe and stable operation, low noise, long service life, and easy installation and maintenance. This type of pump is an old model that is being phased out; the DG type multistage boiler feed pump series and high-temperature boiler feed pumps are products that meet national standards and replace the old GC series. This series of boiler feed pumps is suitable for transporting clean water at temperatures below 110°C or non-corrosive liquids with physical and chemical properties similar to water. It is widely used in industrial and urban water supply and drainage, pressurized water supply in high-rise buildings, garden irrigation, pressure boosting for fire fighting, long-distance water transport, heating, hot and cold water circulation, as well as in auxiliary equipment, being especially suitable for feeding small boilers.

　　All boiler feed pump products manufactured by Zhonglian Pump Industry use computer design and optimization. The company has a strong technical force, extensive production experience, and complete inspection methods, thus ensuring the stability and reliability of product quality.

Features and application scope of the horizontal multistage boiler feed pump type GC

1. Advanced hydraulic model, high efficiency, and wide performance range.

2. Stable operation of the pump and low noise level.

3. The shaft seal uses soft packing, safe and reliable, simple structure, easy and quick maintenance.

　　The GC boiler feed pump is a type of multistage pump that can also be widely used in water supply for pressure vessels, hot water circulation, water supply in high-rise buildings, agricultural irrigation, pressure boosting for fire fighting, hydraulic cleaning, food, brewing, pharmaceutical, chemical, aquaculture, environmental protection industries, chemical processes, and machine tool equipment, serving as a driving device for water supply and drainage.

Meaning of the model of the horizontal multistage boiler feed pump type GC

Structural diagram of the horizontal multistage boiler feed pump type GC

Failure solution of the horizontal multistage boiler feed pump type GC

Failure	Cause	Solution method
1. The pump does not suck water, the pressure gauge and vacuum gauge needles jump violently.	There is not enough water injected into the pump, there are leaks in the pipe and in the instruments.	Inject more water into the pump and tighten the air leak points.
2. The pump does not suck water, the vacuum gauge indicates high vacuum.	The bottom valve is not open or is blocked, the resistance in the suction pipe is too high, the suction height is too high.	Correct or change the bottom valve. Or change the suction pipe to reduce the suction height.
3. The pressure gauge shows pressure, but the pump does not discharge water.	The resistance in the discharge pipe is too high, the rotation direction is incorrect, the impeller is blocked. The pump speed is insufficient.	Check the short pipe and the motor. Remove the pipe connection, clean the impeller, and increase the pump shaft speed.
4. The flow rate is lower than required by the design.	The pump is blocked. The sealing ring is worn out. The speed is insufficient.	Clean the pump and pipes, replace the sealing ring. Increase the pump shaft speed.
5. The power consumption of the pump is too high.	The packing gland is too tight. The packing box heats up. The impeller is worn out. The flow rate of the pump has increased.	Loosen the packing gland. Replace the impeller. Increase the resistance in the discharge pipe to reduce the flow rate.
6. Abnormal noise inside the pump, the pump does not suck water.	The flow rate is too large, the resistance inside the suction pipe is too high, there is air ingress in the suction. The temperature of the suction liquid is too high.	Increase the resistance inside the discharge pipe to reduce the flow rate, check the pump and pipes. Check the bottom valve, reduce the suction height, seal the air leak points, decrease the suction height.
7. Pump vibration.	The pump shaft and motor are not aligned, or the shaft bearing is bent.	Align the central line of the pump shaft and motor.
8. Bearing overheating.	There is no oil, the pump shaft and motor are not aligned.	Add oil. Align the central line of the shaft, check or clean the bearing housing.

Loading, starting, operating, and stopping the horizontal multistage boiler feed pump type GC

1. Loading and unloading sequence

1) Firmly place the sealing ring <9> in the water inlet section <8>.

2) Pass the shaft <9> with sleeve A <5> and the key through the water inlet section <8> and push the impeller (10), place a paper pad in the middle section, mount the middle section (11), then push the second impeller, repeat the previous steps to mount all the impellers and the middle section.

3) Place the balance ring (14) in the water outlet section (13).

4) Assemble the water outlet section (13) in the middle section, then tighten the tension bolts (18) to secure the water inlet section, the middle section, and the water outlet section together.

5) Assemble the balance disc (15) and sleeve B (17).

6) Place the paper pad on the rear cover, mount the rear cover on the water outlet section, and then install the packing and the packing ring (7), the stuffing box (6) in the packing chamber of the water inlet section and the rear cover respectively.

7) Mount the bearing housing (4) on the water inlet section and on the rear cover, and secure with bolts.

8) Install the ball bearing〈3〉 and secure it with the shaft sleeve nut〈1〉 and the round nut〈20〉 respectively.

9) Place an appropriate amount of grease inside the bearing housing, place the paper washer on the bearing cover (2), and secure the bearing cover to the bearing housing with screws.

10) Install the water return pipe, coupling components, and all square plugs.

11) Disassembly is performed in the reverse order of the previous procedure.

Preparations before installation:

1) Inspect the water pump and the motor;

2) Prepare the tools and lifting machinery;

3) Check the machine base;

2. Installation sequence

1) Transport the complete pump assembly to the site; if it comes with a base, the motor is already installed. When leveling the base, it is not necessary to disassemble the pump and the motor.

2) Place the base on the foundation, place wedge-shaped iron wedges near the anchor bolts to raise the base approximately 20-40 millimeters, preparing it for leveling and filling with cement.

3) Use a level to check the horizontality of the base, tighten the anchor nuts after leveling, and fill the base with cement.

4) After 3-4 days of cement drying, check the level again.

5) Clean the dirt from the support surface of the base, the feet of the pump, and the feet of the motor, and place the motor and the pump on the base.

6) Adjust the horizontality of the pump shaft. After leveling, properly tighten the nuts to prevent movement. After adjustment, install the motor; place iron plates where it is not level, leaving a gap between the pump and the coupling.

7) Place the level on the coupling and check if the center shaft of the pump and the center shaft of the motor are aligned. If they are not aligned, place thin iron sheets under the feet of the motor and the pump to level the outer edges of the two couplings with the level, then remove the thin sheets and replace them with a machined support plate, and check the installation again.

To verify the accuracy of the installation, use gauges in various opposite positions to measure the gap between the surfaces of the two couplings. The maximum and minimum difference of the gap around the coupling surface should not exceed 0.3 mm, and the difference in the upper and lower center line or left and right at both ends should not exceed 0.1 mm.

3. Start and stop:

1. Clean the oil applied to the shaft and other lubricated parts.

2. Clean the bearing and the shaft chamber with gasoline and dry them with cotton.

3. Add calcium-based grease inside the bearing housing.

4. Start-up test. Turn on the motor and check the direction of rotation; it is strictly prohibited for the pump to rotate in the opposite direction to avoid loosening the shaft sleeve nut.

5. Fill the pump with water or use a vacuum pump to prime it.

6. Close the valve and the pressure gauge plug on the discharge pipe.

7. After completing the previous steps, turn on the motor and open the pressure gauge plug.

8. When the pump operates at normal speed, the pressure gauge will show the appropriate pressure; then open the vacuum gauge plug and gradually open the gate valve on the drainage pipe until the required pressure is reached.

9. When stopping the pump, slowly close the gate valve on the drainage pipe, close the vacuum gauge plug, stop the motor, and then close the pressure gauge plug.

10. When the pump is out of service for a long period, it must be disassembled, dry the water from the pump parts, and apply anti-rust oil on the sliding surfaces for proper storage.

Operation:

1. Pay attention to the temperature of the pump bearing; it should not exceed the ambient temperature by 35℃. The limit temperature should not be greater than 75℃.

2. During the operation of the pump, pay attention to frequent lubrication.

3. The normal level of water leakage in the packing chamber should be 10-20 drops per minute; always adjust the stuffing box pressure to maintain this level.

4. Periodically inspect the coupling and pay attention to the temperature increase of the motor bearing.

5. During operation, if noise or abnormal sounds occur, stop the machine immediately to inspect the cause.

Product parameters

Parameters of the horizontal multistage boiler feed pump model type GC

Model parameters	Flow (Q)		Manometric height (H)	Speed (n)	Shaft power (Pa)	With electric motor	Efficiency (n)	NPSH (Cavitation amount)	Weight of the pump
Model parameters	m3/h	L/s	m	r/min	kw	Power kw	%	m	kg
1.5GC-5×2	6	1.66	46	2950	2	3	38	3.6	70
1.5GC-5×3	6	1.66	69	2950	3	4	38	3.6	76
1.5GC-5×4	6	1.66	92	2950	4	5.5	38	3.6	89
1.5GC-5×5	6	1.66	115	2950	5	7.5	38	3.6	98
1.5GC-5×6	6	1.66	138	2950	6	7.5	38	3.6	107
1.5GC-5×7	6	1.66	161	2950	7	7.5	38	3.6	116
1.5GC-5×8	6	1.66	184	2950	8	11	38	3.6	125
1.5GC-5×9	6	1.66	207	2950	9	11	38	3.6	134
2.5GC-6×2	20	5.6	54	2950	6.2	11	47.4	5.2	172
2.5GC-6×2	15	4.2	62	2950	5.8	11	43.7	4.9	149
2.5GC-6×3	15	4.2	93	2950	8.7	15	43.7	4.9	172
2.5GC-6×3	20	5.6	81	2950	9.3	15	47.4	5.2	172
2.5GC-6×4	15	4.2	124	2950	11.6	22	43.7	4.9	187
2.5GC-6×4	20	5.6	108	2950	12.4	22	47.4	5.2	187
2.5GC-6×5	15	4.2	155	2950	14.5	22	43.7	4.9	202
2.5GC-6×5	20	5.6	135	2950	15.5	22	47.4	5.2	202
2.5GC-6×6	15	4.2	186	2950	17.4	30	43.7	4.9	217
2.5GC-6×6	20	5.6	162	2950	18.6	30	47.4	5.2	217
2.5GC-6×7	15	4.2	217	2950	20.2	30	43.7	4.9	232
2.5GC-6×7	20	5.6	189	2950	21.7	30	47.4	5.2	232
2.5GC-6×8	15	4.2	248	2950	23.2	37	43.7	4.9	247
2.5GC-6×8	20	5.6	216	2950	24.8	37	47.4	5.2	247
2.5GC-6×9	15	4.2	279	2950	26.1	22	43.7	4.9	262
2.5GC-6×9	20	5.6	243	2950	27.9	22	47.4	5.2	262
2GC-5×2	10	2.8	64	2950	4.4	7.5	39.6	4.6	140
2GC-5×3	10	2.8	96	2950	6.6	11	39.6	4.6	163
2GC-5×4	10	2.8	128	2950	8.8	15	39.6	4.6	178
2GC-5×5	10	2.8	160	2950	11	15	39.6	4.6	193
2GC-5×6	10	2.8	192	2950	13.2	18.5	39.6	4.6	206
2GC-5×7	10	2.8	224	2950	15.4	22	39.6	4.6	223
2GC-5×8	10	2.8	256	2950	17.6	30	39.6	4.6	238
2GC-5×9	10	2.8	288	2950	19.8	30	39.6	4.6	253
4GC-8×10	45	12.5	410	2950	84	100	60	4.9
4GC-8×10	55	15.3	380	2950	91	100	62.5	5.5
4GC-8×10	30	8.3	430	2950	69	100	51	4.5
4GC-8×2	30	8.3	86	2950	13.8	30	51	4.5
4GC-8×2	45	12.5	82	2950	16.8	30	60	4.9
4GC-8×2	55	15.3	76	2950	18.1	30	62.5	5.5
4GC-8×3	55	15.3	114	2950	27.2	37	62.5	5.5
4GC-8×3	30	8.3	129	2950	20.7	37	51	4.5
4GC-8×3	45	12.5	123	2950	25.2	37	60	4.9
4GC-8×4	30	8.3	172	2950	27.6	55	51	4.5
4GC-8×4	45	12.5	164	2950	27.6	55	60	4.9
4GC-8×4	55	15.3	152	2950	36.2	55	62.5	5.5
4GC-8×5	30	8.3	215	2950	34.5	55	51	4.5
4GC-8×5	45	12.5	205	2950	42	55	60	4.9
4GC-8×5	55	15.3	190	2950	45.3	55	62.5	5.5
4GC-8×6	30	8.3	258	2950	41.4	75	51	4.5
4GC-8×6	45	12.5	246	2950	50.4	75	60	4.9
4GC-8×6	55	15.3	228	2950	54.1	75	62.5	5.5
4GC-8×7	30	8.3	301	2950	48.2	75	51	4.5
4GC-8×7	45	12.5	287	2950	58.8	75	60	4.9
4GC-8×7	55	15.3	266	2950	63.4	75	62.5	5.5
4GC-8×8	30	8.3	344	2950	55	100	51	4.5
4GC-8×8	45	12.5	328	2950	67	100	60	4.9
4GC-8×8	55	15.3	304	2950	73	100	62.5	5.5
4GC-8×9	30	8.3	387	2950	62	100	51	4.5
4GC-8×9	45	12.5	369	2950	75.5	100	60	4.9
4GC-8×9	55	15.3	342	2950	82	100	62.5	5.5

Performance curve of the horizontal multistage boiler feed pump type GC

Reference diagram for the installation of the horizontal multistage boiler feed pump type GC

Installation dimensions of the horizontal multistage boiler feed pump type GC

Dimensions		A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	Motor model
Level
Pump model
1.5GC-5	2	976	750	520	307	123	187	207	249	122.5	345	340	95	100	105	180	315	315	Y100L-2
	3	1046	818	552	332	133	200	214	249	172.5	357	360	95	112	115	190	345	345	Y112M-2
	4	1171	917	615	356	136	236	253	249	222.2	357	390	75	132	135	210	365	365	Y132S1-2
	5	1221	966	641	382	135	236	253	249	272.5	357	390	75	132	135	210	365	365	Y132S2-2
	6	1271	1016	666	407	135	236	253	249	322.5	357	390	75	132	135	210	365	365	Y132S2-2
	7	1321	1058	685	433	133	236	253	249	372.5	357	390	75	132	135	210	365	365	Y132S2-2
	8	1496	1232	800	458	168	277	337	249	422.5	390	465	80	160	165	255	325	410	Y160M1-2
	9	1546	1280	825	483	168	277	337	249	472.5	390	465	80	160	165	255	325	410	Y160M1-2
2GC-5	2	1235	321	660	402	136	236	253	326	160	485	448	133	132	135	210	430	430	Y132S2-2
	3	1420	1130	768	426	182	277	337	326	220	485	490	105	160	165	255	435	435	Y160M1-2
	4	1480	1194	797	456	187	277	337	326	280	485	490	105	160	165	255	435	435	Y160M2-2
	5	1540	1254	827	486	187	277	337	326	340	48	490	105	160	165	255	435	435	Y160M2-2
	6	1645	1355	880	516	205	300	359	326	400	485	490	105	160	165	255	435	435	Y160L-2
	7	1730	1366	885	546	211	318.5	365.5	326	460	485	515	85	180	165	285	450	453	Y180M-2
	8	1895	1561	991	576	240	379.5	409.5	326	520	505	560	85	200	180	310	450	510	Y200L1-2
	9	1955	1623	1021	606	240	379.5	409.5	326	580	515	570	95	200	200	310	450	520	Y200L1-2

2.5GC-6	2	1235	921	660	402	136	236	253	326	160	485	448	133	132	135	210	430	430	Y132S2-2
	3	1420	1134	767	426	187	277	337	326	220	485	490	105	160	165	255	435	435	Y160M2-2
	4	1525	1239	819	456	210	300	359	326	280	485	490	105	160	165	255	435	435	Y160L-2
	5	1610	1306	855	486	211	318.5	365.5	326	340	845	490	85	180	180	285	450	450	Y180M-2
	6	1670	1366	885	516	211	318.5	365.5	326	400	485	490	85	180	180	285	450	450	Y180M-2
	7	1835	1500	960	546	240	379.5	409.5	326	460	505	515	85	200	200	310	450	505	Y200L1-2
	8	1895	1560	990	576	240	379.5	409.5	326	520	505	560	85	200	200	310	450	505	Y200L1-2
	9	1995	1620	1020	606	240	379.5	409.5	326	580	505	570	85	200	200	310	450	505	Y200L2-2
4GC-8	2	1545	1246	837	480	211	318.5	351.5	385	190	600	565	135	180	180	285	485	545	Y180M-2
	3	1725	1399	618	517	235	379.5	395.5	385	265	620	610	135	200	200	310	550	550	Y200L1-2
	4	1840	1510	975	555	250	400.5	414.5	385	340	635	655	125	225	225	345	560	560	Y225M-2
	5	2030	1681	1080	592	274	447.5	482.5	385	415	660	700	125	250	250	385	600	600	Y250M-2
	6	2105	1755	1117	629	274	447.5	482.5	385	490	660	700	125	250	250	385	600	600	Y250M-2
	7	2250	1902	1186	667	311	486	514	385	565	680	755	115	280	280	410	670	558	Y280S-2

Why Choose Us?

Changsha Zhonglian Pump Industry Co., Ltd. was established in 1989, following the reform of the Changsha Water Pump Factory. It is a national high-tech comprehensive enterprise integrating design, research and development, manufacturing, and service. The company was listed on the Hunan Provincial Stock Exchange on December 31, 2019, with the abbreviated name "Zhonglian Pump Industry" and stock code: 600275HN. It is currently a key enterprise in China's centrifugal pump industry and one of the leading domestic manufacturers of multi-stage pumps, headquartered in Changsha, Hunan, a historical and cultural city in China.

FAQ

What products do you mainly produce?

Zoomlion Pump Industry manufactures various large industrial centrifugal pumps. The main products include: self-balancing multistage pumps, multistage centrifugal pumps, single-stage centrifugal pumps, split-case pumps, chemical pumps, submersible pumps, pipeline pumps, long-shaft pumps, condenser pumps, and more.

Can you help me choose a model?

Of course! If the water pump model is not selected accurately, it can cause significant problems. After you take it back, it might be either too small to meet the usage requirements or too large, resulting in higher electricity and fuel costs, increasing the operating expenses.

Why is the price quotation so slow?

Because centrifugal pumps are non-standard custom products with many models and a wide price range. Even for the same model, the price varies greatly depending on the materials and configurations used. Taking the most common pump accessory—the impeller—as an example, the price of a stainless steel impeller is several times that of a cast iron impeller. Therefore, we need to clearly confirm the relevant information to provide you with an accurate price. Normally, if you provide comprehensive information, we can quote within 5 minutes.

What information should I provide when I need a quote?

Usually, if you want to get an accurate quote, it is recommended that you provide us with the following information: pump flow rate, head, on-site operating voltage, frequency, temperature of the conveyed liquid, pH value, solid particle content, on-site installation conditions (horizontal or vertical installation), and other related details. If you are not very familiar with these, it’s okay; our sales manager will assist you in determining them.

Do you have centrifugal pumps in stock?

There are many models and configurations of centrifugal pumps. Except for a small number of commonly used standard models that are in stock, the vast majority of models and configurations are not stocked and are customized products. We need to first select the pump based on your site conditions such as flow rate, head, medium temperature, pH value, and installation conditions. After determining the pump model and configuration, we can then place an order with the workshop for production.

What is your usual delivery time?

Models in stock can be shipped by the next day at the latest. Others are custom-made, and depending on the product size and specific project conditions, the delivery time is generally between 7-90 days. Please consult our sales manager for details: 0731-88632200 。