D. DG type horizontal boiler feed centrifugal pump

NegotiableUpdate on 04/30

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

The D-type horizontal, single suction multi-stage, segmented centrifugal pump products comply with the JB/T1051-93 "Types and Basic Parameters of Multi stage Clean Water Centrifugal Pumps" standard. It has the 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 and chemical properties similar to water. It can also be used to transport hot water, oil, corrosive or abrasive media by changing the material and sealing form of the pump flow components and adding cooling systems. Suitable 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. Our multi-stage pumps are all designed and optimized using computers. The company has strong technical strength, rich production experience, and comprehensive testing methods to ensure stable and reliable product quality.

Product Details

Product Introduction

Product features:

The hydraulic model is advanced, efficient, and has a wide range of performance.
The pump runs smoothly with low noise.
The shaft seal adopts soft packing seal or mechanical seal, which is safe, reliable, structurally simple, and easy to maintain.
The shaft is a fully enclosed structure, ensuring no contact with the medium, no corrosion, and a long service life.

Technical parameters: Flow rate: 6.3-300m3/h; Head: 13-650m; Power: 2.2-400KW; Speed: 1450-2950r/min; Caliber: 50-200; Temperature range: ≤ 105 ℃; Work pressure: ≤ 3.0Mpa.

Model Meaning

D（DG） 46 - 50×12

D - Segmented centrifugal pump for water supply

G - Boiler pump

46- Design flow rate (m3/h)50- Single stage head (m)

12- Level

Selection range	Suitable 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.	performance parameter		This data is for reference only, please refer to the actual order!	Performance parameter table of D-type horizontal multi-stage centrifugal pump:	Model
Selection range		series	internet traffic	lift	power	rotational speed
m?/h	3	18	5	28.5	3	2950
	4			38	4
	5			47.5	5.5
	6			57	5.5
	7			66.5	7.5
	8			76	7.5
	9			85.5	7.5
	10			95	11
	11			104	11
	12			114	11
L/S	2	32.4	9	22.7	3	2950
	3			34.1	5.5
	4			45.5	7.5
	5			56.8	7.5
	6			68.1	11
	7			79.5	11
	8			90.8	15
	9			102.1	15
	10			113.5	18.5
	11			124.9	18.5
	12			136.2	18.5
(mm）	2	43	12	60	15	2950
	3			90	18.5
	4			120	22
	5			150	30
	6			180	37
	7			21	45
	8			240	55
	9			270	55
	10			300	55
（Kw）	2	54	15	32	7.5	2950
	3			48	15
	4			64	18.5
	5			80	22
	6			96	22
	7			112	30
	8			128	30
	9			144	37
	10			160	45
	11			176	55
	12			132	55
(r/min）	2	108	30	40	18.5	2950
	3			60	30
	4			80	37
	5			100	45
	6			120	55
	7			140	75
	8			160	75
	9			180	90
	10			200	90

50D8

80D12	80D30	100D16	125D25	Performance parameter table of DG type horizontal multi-stage centrifugal pump:	model		series	rotational speed
80D12	80D30	internet traffic	lift	power	efficiency	Required cavitation allowance	rpm	m3/h
m	3	2950	3.75	76.5	2.37	4	33	2
			6.3	75	2.86		45	2
			7.5	73.5	3.19		47	2.5
	4		3.75	102	3.16	5.5	33	2
			6.3	100	3.81		45	2
			7.5	98	4.26		47	2.5
	5		3.75	127.5	3.95	5.5	33	2
			6.3	125	4.77		45	2
			7.5	122.5	5.32		47	2.5
	6		3.75	153	4.73	7.5	33	2
			6.3	150	5.72		45	2
			7.5	147	6.39		47	2.5
	7		3.75	178.5	5.52	7.5	33	2
			6.3	175	6.67		45	2
			7.5	171.5	7.45		47	2.5
	8		3.75	204	6.31	11	33	2
			6.3	200	7.63		45	2
			7.5	196	8.52		47	2.5
	9		3.75	229.5	7.1	11	33	2
			6.3	225	8.58		45	2
			7.5	220.5	9.58		47	2.5
	10		3.75	255	7.89	15	33	2
			6.3	250	9.53		45	2
			7.5	245	10.65		47	2.5
	11		3.75	280.5	8.68	15	33	2
			6.3	275	10.5		45	2
			7.5	269.5	11.71		47	2.5
	12		3.75	306	9.47	15	33	2
			6.3	300	11.44		45	2
			7.5	294	12.78		47	2.5
shaft power	3	2950	7.5	84.6	3.93	5.5	44	2
			12.5	75	4.73		54	2
			15	69	5.32		53	2.5
	4		7.5	112.8	5.24	7.5	44	2
			12.5	100	6.3		54	2
			15	92	7.09		53	2.5
	5		7.5	141	6.55	11	44	2
			12.5	125	7.88		54	2
			15	115	8.89		53	2.5
	6		7.5	169.2	7.85	15	44	2
			12.5	150	9.46		54	2
			15	138	10.64		53	2.5
	7		7.5	197.5	9.16	15	44	2
			12.5	175	11		54	2
			15	161	12.41		53	2.5
	8		7.5	225.6	10.41	15	44	2
			12.5	200	12.61		54	2
			15	184	14.18		53	2.5
	9		7.5	253.8	11.78	18.5	44	2
			12.5	225	14.18		54	2
			15	207	15.95		53	2.5
	10		7.5	282	13.09	18.5	44	2
			12.5	250	15.76		54	2
			15	230	17.73		53	2.5
	11		7.5	310.2	14.4	22	44	2
			12.5	275	17.34		54	2
			15	253	19.5		53	2.5
	12		7.5	338.4	15.7	22	44	2
			12.5	300	18.9		54	2
			15	276	21.3		53	2.5
Motor Power	3	2950	7.5	162	8.8	18.5	37.8	2
			12.5	150	10.6		48	2
			15	139.5	11.9		48	2.5
	4		7.5	216	11.7	22	37.8	2
			12.5	200	14.1		48	2
			15	186	15.9		48	2.5
	5		7.5	270	14.6	30	37.8	2
			12.5	250	17.7		48	2
			15	232.5	19.8		48	2.5
	6		7.5	324	17.6	30	37.8	2
			12.5	300	21.3		48	2
			15	279	23.7		48	2.5
	7		7.5	378	20.4	37	37.8	2
			12.5	350	24.8		48	2
			15	325.5	27.7		48	2.5
	8		7.5	432	23.3	37	37.8	2
			12.5	400	28.4		48	2
			15	372	31.7		48	2.5
	9		7.5	468	26.3	45	37.8	2
			12.5	450	31.9		48	2
			15	418.5	35.7		48	2.5
	10		7.5	540	29.2	45	37.8	2
			12.5	500	35.5		48	2
			15	465	39.6		48	2.5
	11		7.5	594	32.1	55	37.8	2
			12.5	550	39		48	2
			15	511.5	43.5		48	2.5
	12		7.5	648	35	75	37.8	2
			12.5	600	42.6		48	2
			15	558	47.8		48	2.5
(%)	3	2950	15	102	8.33	15	50	2.2
			25	90	9.88		62	2.2
			30	82.5	10.7		63	2.6
	4		15	136	11.1	18.5	50	2.2
			25	120	13.1		62	2.2
			30	m	14.26		63	2.6
	5		15	170	13.89	22	50	2.2
			25	150	16.47		62	2.2
			30	137.5	17.83		63	2.6
	6		15	204	16.67	30	50	2.2
			25	180	19.17		62	2.2
			30	165	21.4		63	2.6
	7		15	238	19.44	30	50	2.2
			25	210	23.1		62	2.2
			30	192.5	24.96		63	2.6
	8		15	272	22.22	37	50	2.2
			25	240	26.4		62	2.2
			30	220	28.53		63	2.6
	9		15	306	25	37	50	2.2
			25	270	29.65		62	2.2
			30	247.5	32.1		63	2.6
	10		15	340	27.8	45	50	2.2
			25	300	32.9		62	2.2
			30	275	35.7		63	2.6
DG6-25	3	2950	15	154.5	15.78	22	40	2.5
			25	150	18.91		54	2.8
			30	144	20.64		57	3.2
	4		15	206	21.04	30	40	2.5
			25	200	25.22		54	2.8
			30	192	27.5		57	3.2
	5		15	257.5	26.2	37	40	2.5
			25	250	31.52		54	2.8
			30	240	34.4		57	3.2
	6		15	309	31.56	45	40	2.5
			25	300	37.82		54	2.8
			30	288	41.28		57	3.2
	7		15	380.5	38.86	55	40	2.5
			25	350	44.1		54	2.8
			30	336	48.16		57	3.2
	8		15	412	42	75	40	2.5
			25	400	50.45		54	2.8
			30	384	55.04		57	3.2
	9		15	463.5	47.33	75	40	2.5
			25	450	56.74		54	2.8
			30	432	61.92		57	3.2
	10		15	515	52.59	75	40	2.5
			25	500	63.04		54	2.8
			30	480	68.8		57	3.2
	11		15	566	57.8	90	40	2.5
			25	550	69.3		54	2.8
			30	528	75.68		57	3.2
	12		15	618	63.11	110	40	2.5
			25	600	75.65		54	2.8
			30	576	82.56		57	3.2
DG12-25	3	2950	30	102	13.02	22	64	2.4
			46	90	16.11		70	3
			55	81	18.84		68	4.6
	4		30	136	17.36	30	64	2.4
			46	120	21.48		70	3
			55	108	23.79		68	4.6
	5		30	170	21.7	37	64	2.4
			46	150	26.85		70	3
			55	135	29.74		68	4.6
	6		30	204	26.04	37	64	2.4
			46	180	32.21		70	3
			55	162	35.68		68	4.6
	7		30	238	30.38	45	64	2.4
			46	210	37.58		70	3
			55	189	41.63		68	4.6
	8		30	274	34.72	55	64	2.4
			46	240	42.95		70	3
			55	216	47.58		68	4.6
	9		30	306	39.06	55	64	2.4
			46	270	48.32		70	3
			55	243	53.53		68	4.6
	10		30	340	43.3	75	64	2.4
			46	300	53.7		70	3
			55	270	59.5		68	4.6
DG12-50	3	2950	30	166.5	25.19	37	54	2.5
			46	150	29.83		63	2.8
			55	138	32.3		64	3.2
	4		30	222	33.59	45	54	2.5
			46	200	39.77		63	2.8
			55	184	43.06		64	3.2
	5		30	277.5	41.98	55	54	2.5
			46	250	49.71		63	2.8
			55	230	53.85		64	3.2
	6		30	333	50.38	75	54	2.5
			46	300	59.65		63	2.8
			55	276	64.59		64	3.2
	7		30	388.5	58.78	90	54	2.5
			46	350	69.6		63	2.8
			55	322	75.36		64	3.2
	8		30	440	67.18	90	54	2.5
			46	400	79.54		63	2.8
			55	368	86.12		64	3.2
	9		30	499.5	75.57	110	54	2.5
			46	450	89.48		63	2.8
			55	414	96.89		64	3.2
	10		30	555	83.97	132	54	2.5
			46	500	99.42		63	2.8
			55	460	107.66		64	3.2
	11		30	610.5	92.37	132	54	2.5
			46	550	109.36		63	2.8
			55	506	118.42		64	3.2
	12		30	666	100.8	132	54	2.5
			46	600	119.3		63	2.8
			55	552	129.2		64	3.2
DG25-30	2	2950	55	102	24.25	37	63	3.2
			85	90	28.94		72	4.2
			100	78	30.33		70	5.2
	3		55	153	36.38	55	63	3.2
			85	135	43.4		72	4.2
			100	117	45.52		70	5.2
	4		55	204	48.5	75	63	3.2
			85	180	57.87		72	4.2
			100	156	60.7		70	5.2
	5		55	255	60.63	90	63	3.2
			85	225	72.34		72	4.2
			100	195	75.86		70	5.2
	6		55	306	72.75	110	63	3.2
			85	270	86.81		72	4.2
			100	234	91.04		70	5.2
	7		55	357	84.88	132	63	3.2
			85	315	101.3		72	4.2
			100	273	106.2		70	5.2
	8		55	408	97	132	63	3.2
			85	360	115.7		72	4.2
			100	312	121.4		70	5.2
	9		55	459	109.1	160	63	3.2
			85	405	130.2		72	4.2
			100	351	136.6		70	5.2
no	3	2950	55	222	57.3	90	58	3.3
			85	201	68.4		68	4
			100	183	73.3		68	4.4
	4		55	296	76.4	110	58	3.3
			85	268	91.2		68	4
			100	244	97.7		68	4.4
	5		55	370	95.6	132	58	3.3
			85	335	114		68	4
			100	305	122.2		68	4.4
	6		55	444	114.7	160	58	3.3
			85	402	136.9		68	4
			100	366	146.6		68	4.4
	7		55	518	133.8	200	58	3.3
			85	469	159.6		68	4
			100	427	171		68	4.4
	8		55	592	152.9	220	58	3.3
			85	536	182.4		68	4
			100	488	195.4		68	4.4
	9		55	666	172	250	58	3.3
			85	603	205.2		68	DG25-50
			100	549	219.9		68	4.4
DG46-30	3	2950	100	228	97	132	64	3.2
			155	201	114.7		74	5
			185	177	123.9		72	6.6
	4		100	304	129.3	200	64	3.2
			155	268	152.9		74	5
			185	236	165.1		72	6.6
	5		100	380	161.6	220	64	3.2
			155	335	191.1		74	5
			185	295	206.4		72	6.6
	6		100	456	194	280	64	3.2
			155	402	229.3		74	5
			185	354	247.7		72	6.6
	7		100	532	226.3	315	64	3.2
			155	469	267.5		74	5
			185	413	289		72	6.6
	8		100	608	258.6	355	64	3.2
			155	536	305.7		74	5
			185	472	330.3		72	6.6
	9		100	684	290.9	400	64	3.2
			155	603	344		74	5
			185	531	371.6		72	6.6
DG46-50	3	1480	185	141	103	160	69	3
			280	129	127.7		77	4.7
			335	114	138.7		75	6
	4		185	188	137.3	200	69	3
			280	172	170.3		77	4.7
			335	152	184.9		75	6
	5		185	235	171.6	250	69	3
			280	215	212.9		77	4.7
			335	190	231.1		75	6
	6		185	282	205.9	315	69	3
			280	258	255.5		77	4.7
			335	228	277.3		75	6
	7		185	329	240.2	355	69	3
			280	301	298.1		77	4.7
			335	266	323.6		75	6
	8		185	376	274.5	400	69	3
			280	344	340.7		77	4.7
			335	304	369.8		75	6
	9		185	423	308.9	450	69	3
			280	387	383.2		77	4.7
			335	342	416		75	6
DG85-45	5	2980	15	433	55	75	32	3.2
			25	400	60.5		45	3.5
			30	390	72.1		44	5
	6		15	519.6	66	90	32	3.2
			25	480	72.6		45	3.5
			30	468	86.52		44	5
	7		15	606.2	77	110	32	3.2
			25	560	84.7		45	3.5
			30	546	100.94		44	5
	8		15	692.8	88	132	32	3.2
			25	640	96.8		45	3.5
			30	624	115.36		44	5
	9		15	779.4	99	132	32	3.2
			25	720	108.9		45	3.5
			30	702	129.78		44	5
	10		15	866	110	160	32	3.2
			25	800	121		45	3.5
			30	780	144.2		44	5
	11		15	952.6	121	200	32	3.2
			25	880	133.1		45	3.5
			30	858	158.62		44	5
	12		15	1039.2	132	200	32	3.2
			25	960	145.2		45	3.5
			30	936	173.04		44	5
DG85-67	7	2950	36	585.2	114.8	180	50	3.9
			45	560	124.6		55	4
			62	477.4	143.5		56	5.5
	8		36	668.8	131.2	200	50	3.9
			45	640	142.4		55	4
			62	545.6	164		56	5.5
	9		36	752.4	147.6	220	50	3.9
			45	720	160.2		55	4
			62	613.8	184.5		56	5.5
	10		36	836	164	250	50	3.9
			45	800	178		55	4
			62	682	205		56	5.5
	11		36	919.6	180.4	280	50	3.9
			45	880	195.8		55	4
			62	750.2	225.5		56	5.5
	12		36	10032	196.8	280	50	3.9
			45	960	213.6		55	4
			62	818.4	246		56	5.5
4,0	7	2950	54	616	170.9	250	53	4.5
			85	560	199.3		65	4.4
			108	490	218.4		66	5.3
	8		54	704	195.3	280	53	4.5
			85	640	227.8		65	4.4
			108	560	249.6		66	5.3
	9		54	792	219.8	355	53	4.5
			85	720	256.3		65	4.4
			108	630	280.7		66	5.3
	10		54	880	244.2	355	53	4.5
			85	800	284.8		65	4.4
			108	700	311.9		66	5.3
	11		54	968	268.6	400	53	4.5
			85	880	313.2		65	4.4
			108	770	343		66	5.3
	12		54	1056	293	450	53	4.5
			85	960	341.7		65	4.4
			108	840	374.3		66	5.3
DG155-67	6	2950	120	630	307	450	67	3.4
			150	600	353		70	4.8
			180	540	368		72	5.5
	7		120	735	359	500	67	3.4
			150	700	412		70	4.8
			180	630	429		72	5.5
	8		120	840	410	630	67	3.4
			150	800	470		70	4.8
			180	720	491		72	5.5
	9		120	945	461	630	67	3.4
			150	900	518		70	4.8
			180	810	552		72	5.5
	10		120	1050	512	800	67	3.4
			150	1000	588		70	4.8
			180	900	613		72	5.5
DG280-43	4	2950	250	420	386.4	450	74	5.1
			280	400	396		77	5.6
			300	392	416		77	5.9
	5		250	525	483	630	74	5.1
			280	500	495		77	5.6
			300	490	520		77	5.9
	6		250	630	579.6	710	74	5.1
			280	600	594		77	5.6
			300	588	624		77	5.9
	7		250	735	676.2	800	74	5.1
			280	700	693		77	5.6
			300	686	728		77	5.9
	8		250	840	772.8	1000	74	5.1
			280	800	792		77	5.6
			300	784	832		77	5.9
	9		250	945	869.4	1120	74	5.1
			280	900	891		77	5.6
			300	882	936		77	5.9
	10		250	1050	966	1250	74	5.1
			280	1000	990		77	5.6
			300	980	1040		77	5.9

DG25-80

DG45-80

DG85-80 D、DG型卧式锅炉给水离心泵

DG150-100DG280-100

D、DG型卧式锅炉给水离心泵

structural drawings

The D-type water pump is a multi-stage segmented type, with its suction port located on the inlet section in a horizontal direction, and its discharge port vertically upward on the outlet section. Its head can be increased or decreased according to the needs of use. Whether the water pump is well assembled or not has a significant impact on its performance, especially the outlet of each impeller and the inlet and outlet center of the guide vanes. Any slight deviation will reduce the flow rate and head of the water pump, resulting in poor efficiency. Therefore, attention must be paid to assembly after maintenance. The main components of a D-type water pump include: inlet section, middle section, outlet section, impeller, guide vane baffle, outlet section guide vane, shaft, sealing ring, flat flushing disc, shaft sleeve, tail cover, and bearing body. The inlet section, middle section, guide vane baffle, outlet guide wing, outlet section, and tail cover are all made of rust iron, forming the working chamber of the pump together. The impeller is made of high-quality rust iron and has blades inside. The liquid enters on one side along the axial direction. Due to the unequal pressure on the front and back of the impeller, there must be axial force, which is borne by the flat punch plate. The impeller is manufactured through static balance testing. 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, which is directly connected to the motor. The sealing ring is made of rust iron to prevent high-pressure water from leaking back into the inlet section of the water pump. It is fixed on the inlet and middle sections respectively and is a vulnerable part. After wear, it can be replaced with spare parts. The balance ring is made of cast iron and fixed on the outlet section. It, together with the balance plate, forms a flat flushing device. The balance plate is made of wear-resistant rust iron and is installed on the shaft, located between the water outlet section and the tail cover, to balance axial forces. The shaft sleeve is made of rust iron and is located at the packing chamber. It is used to fix the impeller and protect the pump shaft. It is a vulnerable part and can be replaced with spare parts after wear. 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. 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 act as a water seal. The tightness of the filler must be appropriate, neither too tight nor too loose, based on the ability of the liquid to seep out drop by drop. If the packing is too tight, the shaft sleeve is prone to heating and consumes power. The packing is too loose, which reduces the efficiency of the water pump due to liquid loss.

Structural diagram of D-type pump series horizontal multi-stage centrifugal pump:

Installation size
This data is for reference only, please refer to the actual order!
Installation dimension diagram of D-type pump series horizontal multi-stage centrifugal pump:
precautions
Loading, unloading, starting, running, and stopping
（1） Connection sequence:
Tightly install the sealing rings on the inlet section and guide vane baffle respectively.
Install the guide wing on the middle section, and then install the guide wing baffle on all the middle sections.
Insert the installed shaft sleeve A and suspected shaft through the water inlet section, and push them into the impeller. Place a layer of paper pad on the middle section, install the middle section, and then push in the second impeller. Repeat the above steps to install all impellers and the middle section.
Install the balance ring, balance sleeve, and outlet guide wing onto the water section separately.
Install the water outlet section on the middle section, and then tighten the water inlet section, middle section, and water outlet section together with tightening bolts.

Install the flat punch plate and shaft sleeve B (not included in the 50DB pump).

Install the paper pad onto the tail cover, install the tail cover onto the outlet section, and sequentially install the packing, packing ring, and packing cover into the packing chambers of the inlet section and tail cover.
1. Install the bearing bodies separately onto the inlet section and the tail cover, and tighten them with bolts.
2. Install the bearing positioning sleeve, ball bearing, and secure with nuts.
3. Add an appropriate amount of butter into the bearing body, and cover the bearing cover with a paper pad. Install the bearing cover onto the bearing body and tighten it with screws.
Install the coupling components, air release cock, and all square screw plugs. Disassemble according to the opposite steps.
1. （2） Installation:
2. Preparation work before installation.
3. Check the water pump and motor.
4. Prepare tools and lifting machinery.
5. The foundation of the inspection machine.
6. Installation sequence:
7. The entire water pump has been transported to the site, and the electric motor has been installed with the base. It is not necessary to remove the water pump and motor when looking for a flat base.

Place the base on the foundation, place wedge-shaped shims near the anchor screws, and raise the base by about 20 degrees? 40mm, ready to level and fill with water grout.

Use a spirit level to check the levelness of the base, level it, tighten the foot nuts, and fill the base with cement slurry.
Through 3? After 4 days of cement solidification, check the water level again.
Clean the dirt on the support plane of the base, the water pump foot, and the motor foot plane; , and place the water pump and motor on the base.
Adjust the level of the pump shaft, tighten the nut appropriately after leveling to prevent movement. After the adjustment is completed, install the motor. Place an iron plate at the non level position, and leave a certain gap between the pump and the coupling.
Place a ruler on the coupling and check if the axis of the water pump coincides with the axis of the motor. If not, place a thin sheet under the feet of the motor or pump to make the outer circles of the two couplings level with the ruler. Then take out several thin iron sheets from the pad and replace them with a whole iron plate that has been planed, and recheck the installation. In order to check the installation accuracy, use a feeler gauge at several opposite positions to measure the gap between the two coupling planes. The maximum and minimum gap difference on the coupling plane should not exceed 0.3 millimeters, and the difference between the center lines of both ends should not exceed 0.1 millimeters.
（3） Start and Stop:
Apply all the oil applied to the shaft and other oiled parts.
Clean the bearings and oil chamber with gasoline, and wipe them clean with cotton yarn.
Add calcium based spring oil into the bearing body.
The experiment was successful. Check if the motor direction is correct and prevent the nut from loosening due to the rotation of the water pump. Then start the motor.

Inject water into the pump or empty the pump to draw water.

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 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 Close the vacuum gauge plug And stop the motor Then close the pressure gauge plug.

When the water pump is stopped for a long time The water pump should be disassembled Wipe off the water from the pump components And apply rust proof oil on the sliding surface for proper storage.

（4） Operation	Pay attention to the temperature of the water pump bearings It shall not exceed the external temperature of 351, and its maximum temperature shall not exceed 751.	The normal water leakage rate in the grave material room is not more than 15 milliliters per minute, and the tightness of the packing cover should be adjusted at any time.
Regularly inspect the shaft and pay attention to the temperature rise of the motor bearings.	If there is any rattling or abnormal sound during operation, the vehicle should be stopped immediately to investigate the cause	Troubleshooting
Fault	reason	solution
1. The water pump does not absorb water, and the pointers of the pressure gauge and vacuum gauge jump violently.	The water injected into the pump is not enough, and there is air leakage in the pipes and instruments.	Inject water into the water pump again Tighten and block the leak.
2. The water 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. The water absorption height is too high.	Correct or modify the bottom valve condition or change the suction pipe to reduce 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, the impeller is blocked, and the water pump speed is not enough.	Inspect or shorten water pipes and inspect motors. Remove the water pipe joint and clean the impeller. Increase the rotational speed of the water pump shaft.
4. The traffic is lower than the design requirements.	The water pump is blocked, the sealing ring is worn too much, and the speed is insufficient.	Clean the water pump and pipes, replace the sealing ring, and increase the speed of the water pump shaft.
5. The power consumption of the water pump is too high.	The packing gland is too tight, the heating impeller of the packing box is worn, and the water supply of the pump increases.	Loosen the packing cap. Replace the impeller and increase the resistance of the outlet pipe to reduce the flow rate.
6. The internal sound of the water pump is abnormal, and the water pump does not fill water.	The flow rate is too high, and the resistance inside the suction pipe is too high. There is air infiltration at the water absorption point. The temperature of the liquid being sucked is too high.	Increase the resistance inside the outlet pipe to reduce the flow rate. Inspect the suction pipe of the pump. Check the bottom valve, reduce the suction height, block the leakage area, and lower the suction height.