SAP split case pump_Hunan M&W Pump Co., Ltd

SAP pump is a single-stage double-suction split case centrifugal pump. It is a new product developing from SA-pump on the basis of structural optimal design. The products reserve the characteristics of SA type pump of good hydraulic performance, high efficiency， as well as made a new improvement in structure comprehending the technology of West German KSB company and double-suction pump of United States IR company， make it more reasonable and reliable.

This group transfer branch water containing solid particle and liquid physics chemical properties similar to water， transferred media temperature are 0℃~80℃， suitable factory， urban， mining， power generation， water resources engineering， drainage or water supply pump.

Main performance parameters

Pump outlet diameter Dn：100~900mm

Capacity Q：72~20000m3/h

Head H：7~186m

Temperature T：0~80℃

Pump Supporting program

Item	Pump Supporting Program A	Pump Supporting Program B		Pump Supporting Program C
Item	Pump Supporting Program A	1	2	Pump Supporting Program C
Pump casing	Grey cast iron	Ductile cast iron	Ductile cast iron	Extra low carbon stainless steel
Impeller	Grey casting iron	Cast steel	Stainless steel	Duplex S.S
Shaft	#45 steel	#45 steel	Stainless steel	Duplex S.S
Shaft sleeve	#45 steel	#45 steel	Stainless steel	Extra low carbon stainless steel
Wear ring	Grey casting iron	Cast steel	Cast steel	Duplex S.S
Services	For pure water and lower Strength applications	For pure water high strength applications		For media with more solid impurities,PH<6 Chemical corrosion and for high strength applications
These configurations are recommended by the manufacturer,customers could change materials according to specific needs.

Description of Pump Type

For example：10SAP-6A- L-M(F、Y)-J

10 —— Suction diameter divided by 25

(the suction diameter is 250 mm)

SAP —— Single stage double suction, split case centrifugal pump

6 ——Integer after the specific speed is divisible by 10

A —— Changed outer diameter of impeller

(the max diameter without mark)

L —— Vertical type

M —— Anti-frication

F —— Anti-corrosion

Y —— Anti-oil

J —— Pump speed changed

Construction drawing I

Construction drawing II

We could not find any corresponding parameters, please add them to the properties table

1,The inlet and outlet of this type pump both below the pump axis, they are vertical to axis and in horizontal orientation. Maintain without needing to remove inlet, outlet of pipes and electric motor. Looking from driving directions SAP-type pumps are counter clockwise direction.(According to user needs can also be changed to clockwise)

Main Parts of pump:⒈Lower Casing;⒉Upper Casing;⒊Impeller;⒋Shaft;⒌Double Suction Seal Ring;⒍Shaft Sleeve.……etc..

2,In addition to shafts are made of quality carbon steel, the remaining main parts are made of cast iron.

3,The impeller working chamber consists of pump body and the pump cover. The spiral holes for installing the vacuum gauge and pressure gauge locate at the inlet flange and the outlet flange .At the bottom of the inlet and outlet flange have drain spiral hole.(According to customer requirements using stainless steel shaft and bronze impeller)

4,The impeller adjusted by static balancing is fixed on the shaft by the shaft sleeves and the nuts。For the axial force of the impeller, it can be balanced by symmetrical distribution of the impeller and the both sides intake water .

5,The pump shaft is supported by single row radial ball bearings. The bearing is installed at the bearing body which fitted on both ends of the pump casing.

6,The double suction seal ring is used to reduce water leakage from the pump pressure chamber flow back to the suction chamber.

7,The pump is driven by the motor through the flexible coupling.(It also can be driven by diesel engine if necessary)

The shaft seal is soft packing or mechanical seal, the packing ring is installed before packing in order to prevent air from entering pump, cooling and lubricating seal chamber. While the pump operation, a small amount of high pressure water flow into the packing or mechanical seals chamber through the ladder-shaped groove on the horizontally split face of the pump cover, which function as water seal.

Performance Data

Type

Capacity

Head

Speed

Shaft power

Motor power

EFF

(NPSH)r

The structural

form

(m³/h)

(l/s)

(m)

(r/min)

(kw)

(%)

(m)

6SAP-6

126

180

216

35

50

60

104

97

87

2980

48.8

59.4

64.7

75

73

80

79

3.0

3.8

5.3

Structure drawing I

A

119

170

204

33

47.2

56.6

91

84.5

76

2980

42

50.1

54.7

75

70

78

77

3.0

3.7

4.7

J

72

90

108

20

25

30

25

22.5

20

1480

6.7

7.4

8.4

11

73

74

70

2.6

2.7

2.9

6SAP-8

108

160

193

30

44.5

53.5

58

54

50

2980

24.3

29

31.2

37

70

81

84

2.9

3.8

4.4

A

108

144

174

30

40

48.3

46

44

39

2980

17.8

21.5

23

30

76

80

2.9

3.6

4.1

B

108

133

160

30

36.9

44.5

38

36

32

2980

15.5

16.9

18.1

22

72

77

2.9

3.4

3.8

8SAP-7

216

280

336

60

77.8

93.5

99

95

87

2980

78.6

90.5

100.9

132

74

80

79

4.0

4.7

6.0

A

210

262

314

58.4

72.8

87.2

87

83

74

2980

68.2

76.9

83.2

110

73

77

76

4.0

4.5

5.7

B

196

247

300

54.4

68.6

83.4

76

73

63

2980

56.2

64.6

71.5

75

72

76

72

4.0

4.2

5.4

8SAP-10

194

280

351

53.9

77.8

97.5

71

63

52

2980

52.1

59.3

65.4

75

72

81

76

2.8

4.1

5.3

A

180

259

324

50

72

90

58

52

41

2980

40.6

46.4

50.2

55

70

79

72

2.7

3.8

4.9

B

173

239

288

48

66.4

80

48

44

36

2980

32.2

36.7

38.1

45

70

78

74

26

3.5

4.2

10SAP-6

432

540

720

120

150

200

96

94

89

1480

152.6

177.2

215.4

250

74

78

81

5.1

6.3

9.2

A

432

540

720

120

150

200

85.3

84

76

1480

129.3

154.4

186.2

220

77.6

80

5.1

6.3

9.2

B

432

540

720

120

150

200

76.4

74

67

1480

121.4

137.7

164.2

185

74

79

80

5.1

6.3

9.2

Type

Capacity

Head

Speed

Shaft power

Motor power

EFF

(NPSH)r

The structural

form

(m³/h)

(l/s)

(m)

(r/min)

(kw)

(%)

(m)

10SAP-6

C

400

500

600

111.1

138.9

166.6

66.4

65.6

62.5

1480

95.1

113

130.8

160

76

79

78

4.6

5.7

7.5

Structure drawing I

J

400

500

600

111.1

138.9

166.7

42

39

35

980

58.6

65.5

72.4

90

78

81

79

3.6

4.7

6.6

JA

300

400

500

83.3

111.1

138.9

36.8

36

33

980

39.3

49.6

56.1

75

76.4

79

80

3.3

3.6

4.7

JB

300

400

500

83.3

111.1

138.9

33

32

28

980

34.7

44.1

48.2

55

77.5

79

3.3

3.6

4.7

12SAP-10

610

790

900

169.4

219.4

250

59

54

47.8

1480

113.9

131.9

137.8

160

86

88

85

4.1

4.6

5.1

A

570

740

846

158.3

205.6

235

52

47.5

42

1480

93.8

108.9

113.9

132

86

87.9

84.9

4.0

4.4

4.8

B

530

686

780

147.2

190.6

216.7

147.2

190.6

216.7

1480

73.9

85.9

98.9

110

86.5

88

85

3.9

4.3

4.6

14SAP-10

900

1080

1260

250

300

350

70

68

64

1480

206.7

229.8

249.5

280

83

87

88

5.0

6.3

6.9

A

900

1080

1260

250

300

350

60

58

54

1480

175

196

212.9

250

84

87

5.1

6.3

6.9

B

900

1080

1260

250

300

350

51

48

44

1480

148.8

162.2

179.7

220

84

87

84

5.1

6.3

6.9

J

650

800

1000

180.6

222.2

277.8

30

28

24

980

162.4

70.1

77.8

90

85

87

84

4.0

4.1

5.1

JA

600

720

900

166.7

200

250

27

25

22

980

52.5

56.3

62.6

75

84

87

86

4.0

4.8

4.1

JB

600

720

900

166.7

200

250

23

21

18

980

44.2

47.3

51.9

75

85

87

85

4.0

4.1

JJA

450

547

684

125

151.9

190

15.6

14.5

12.7

740

22.7

25.1

27.8

37

84

86

85

5.8

14SAP-20

870

1320

1550

241.7

366.7

430.6

33

26

21.5

1480

101.5

109.9

111.3

132

77

85

81.5

5.8

7.8

10.1

16SAP-9

1080

1260

1620

300

350

450

97.6

96

90

1480

400.9

427.8

472.6

630

71.6

77

84

5.5

7.0

8.5

Structure drawing II

A

1080

1260

1620

300

350

450

85.5

85

78

1480

344.4

394.1

409.6

450

73

74

84

5.2

5.9

7.9

Type

Capacity

Head

Speed

Shaft power

Motor power

EFF

(NPSH)r

The structural

form

(m³/h)

(l/s)

(m)

(r/min)

(kw)

(%)

(m)

16SAP-9

B

1080

1260

1620

300

350

450

78

76

68

1480

297.9

318

348.8

450

77

82

86

5.2

5.9

7.9

Structure drawing II

J

900

1080

1260

250

300

350

42

40

37

980

128.6

140

149.3

185

80

84

85

4.6

4.9

5.2

JA

900

1080

1260

250

300

350

37

35

32

980

111.9

122.5

130.7

160

80

83

86

4.6

4.9

5.2

JB

800

900

1080

222

250

300

33

32

30

980

89.8

94.4

102.5

132

72.8

78.4

82.3

4.6

20SAP-5

1667

2000

2400

463.1

555.6

666.7

130.4

127.5

120.6

980

813.2

885.8

957.8

1120

72.8

78.4

82.3

4

4.8

5

Structure drawing I

A

1500

1875

2250

416.67

521

625

113.3

109

103.4

980

648.2

709.2

770.7

800

71.4

78.5

82.2

4

4.8

5

B

1408

1760

2112

391.1

489

586.67

101

96.8

91.4

980

545.4

594.9

641.1

710

71

78

82

2.6

3.2

3.4

20SAP-6

1500

2160

2500

416.1

600

694.4

112

100

87.5

980

571.1

700.2

739.9

800

80

84

80.5

3.4

4.6

5.6

A

1414

2036

2357

392.8

656.6

654.7

101

88.9

77.8

980

479

583.3

616.5

710

80

84.5

81

3.4

4.4

5.2

B

1320

1900

2200

367

528

611

88.6

77.4

66

980

400.9

476.9

497.2

560

79.5

84

79.5

3.4

4.1

4.8

20SAP-10

1500

2160

2500

416.7

600

694.4

65.5

60

55.5

980

338.7

401

434.2

500

79

88

87

6.6

A

1410

2034

2355

391.6

565

654

58

53.2

49.3

980

281.8

338.7

367.5

400

79

87

86

6.6

B

1326

1910

2210

368

531

614

51.2

47

43.4

980

232.3

287.8

307.3

355

79.5

85

6.6

20SAP-10-A

2160

3384

4320

600

940

1200

600

940

1200

1480

1161.1

1413.7

1606.8

1600

77

88

82

6.6

A

2160

3384

4320

600

940

1200

133

116

93

1480

1003

1228.7

1367.6

1400

78

87

80

6.6

B

2160

3384

4320

600

940

1200

115

98

72

1480

856.2

1088.1

1114.5

1120

79

83

76

6.6

1. Inspection before starting

Be sure to check the followings:

(1) Insure pump plate fixed on foundation;

(2) Insure coupling and pump unit alignment;

(3) Insure piping connected by requirements;

(4) Insure motor installed by Installation and operation instruction;

(5) Insure the rotor of pump rotate easily (at least a circle);

(6) Insure the coupling guard installed;

(7) Insure the operator fully understand the safety specification that they should obey and the failures may be occurred;

(8) Insure the shaft seal liquid or cooling liquid lead-in by requirements;

(9) Insure the shaft seal installed by operation instruction;

(10) Insure the auxiliary device installed by operation instruction (If they exist);

(11) nsure the bearing have lubricated well, especially insure new pump grease or thin oil do not reduce or go bad;

(12) Insure the air trapped in pump escaped。

2. Shaft Seal

Open valves properly for stuffing box seal

3. Air exhaust

Pump and piping should fill of medium before starting, there are two methods: creation of vacuum or priming. If the pump operated on the suction state, exit gas by bolt hole on top of the pump casing.

Note: When creation of vacuum, evacuate air by bolt hole on top of the pump casing. When priming, open both side low pressure volute chamber of pump casing and the top plug, to get rid of pump vibration by remained air in pump.

4. Starting

(1) Close outlet valve;

(2) Open inlet valve completely;

(3) Open all auxiliary piping (cooling, heating, sealing, rinsing and lubricant liquid), and check all capacity and pressure;

(4) Starting pump after finishing above procedures;

(5) When the system starting deliver medium and the pressure reading at pressure gauge rise up, open outlet valve slowly。

Note: Forbid pump operating without liquid! Only close outlet valve when the pump start and shutdown, otherwise will damage the pump by overheating.

5. Operation

(1)

Confirm operating point

According to Q-H performance curve of pump, capacity Q varies with the actual operation head. The head depended on the system head (including the altitude difference between inlet and outlet, piping, valves, radiator and so on). So the pump actually operating point B depends on pump performance

curve Q-H and system performance curve Q-HA.

Once capacity settled, the shaft power, efficiency, NPSH settled as well. Pump has limited working range. The minimum capacity are shown as Qmin in Q-H performance curve. Maximum capacity are depended on the cross point of pump tolerance NPSH and system valid NPSHA. Adjust valve can change performance curve Q-HA of system, thereby adjust operation performance, makes pump operation stable and high efficiency.

(2) Operation management

Should pay attention to followings:

a. Pump should work stably

b. Forbid pump operating without liquid

c. To prevent medium temperature rise up, pump can not be run long period when close outlet valve

d. Generally, the bearing temperature not higher than 35℃ of ambient temperature, absolute

operation temperature less than 100℃.

e. Check oil level regularly if use thin oil. Deep groove ball bearing of grease lubrication no need routine maintenance.

f. Do not close inlet valve (if it is exist) when pump operating.

g. Periodical inspection and start jury pump.

h. Check auxiliary piping whether connected well.

i. Check elastic element of coupling, if worn replace immediately.

j. For stuffing box seal there should have a slight drip when running, push stuffing box gland gently until there is a slight drip (about 15-30 drop/min ).

For mechanical seal the seal leakage should reduce gradually. It is about 0-5drop/min after

starting few hours. If the seal leakage increase gradually and reach about 30-60drop/min, should check or adjust mechanical seal.

6. Shutdown

Close discharge valve.

Insure the pump unit stop smoothly when shutdown the motor. Pump should have a proper after-running period, cut heat source at this time, so that the delivered medium can cool down completely and avoid of producing any heat inside pump.

Close suction valve if pump stop work for a long period of time.

Close auxiliary piping, the shaft seal should use seal lubricant even though at stopped state. Evacuate all medium in pump and piping when freeze or stop work for a long-term, so as not to frost crack.

7. Storage

Every pump has inspected strictly before delivery. Recommend to adopt following procedures to store pump.

(1) Store new pump

If store pump at indoor, clean dry place and follow the storage requirements, the longest storage time is 12 months.

(2) If equipment is to be stored for long periods of time should follow below procedures.

a. Pump should keep in installation state and inspect work condition regularly. Start pump once every month or every three months (about 5 minutes). Check running condition before starting pump to insure there is enough liquid.

b. Dismantled pump from piping and check it according to section 5.1 to 5.4. Apply protective agent on inside pump casing especially the gap of the impeller, apply on suction and discharge, then cover the suction.

c. Operation after storage

Inspect and maintain completely before starting pump, especially shaft seal and bearing lubricant. Reinstall all safety protection devices according to requirement before starting.

Problem	Causes	Remedy
starting load too high	1. Starting without closing discharge valve; 2. packing too tight lead to lubricant water can not flow into; 3. Misguide by failing of overcurrent protector	1. Close the valve; 2. Loose packing or check the valve of water seal, check if packing ring against the nozzle of lubricant water, 3. Adjust current limiting threshold or repair overcurrent protector.


Packing overheating	1.Packing too tight; 2.Cooling water can not flow into packing box; 3. Damage in the surface of shaft or shaft sleeve;	1. Loose packing properly; 2.Loose packing or check if the water seal pipe clogged; 3.Repair shaft or shaft sleeve;


Packing leakage excessive	1. Packing worn; 2. Packing too loose; 3. Shaft curved or vibration; 4. Wrong packing bind; 5. Unclean seal water wore shaft; 6. Shaft sleeve worn; 7. Wrong packing; 8.The pressure of seal chamber too high or too low;	1. Replace packing; 2. Tighten packing box gland or add more packing; 3.Align or replace shaft; 4. Rebind packing; 5.Filtrate or use exterior source as seal water, repair; 6.Replace shaft sleeve; 7.Replace packing; 8. Adjust the pressure and capacity of seal liquid or use a sealing liquid from an external source.







Mechanical seal leakage	1. The nominal pressure of mechanical seal lower than actual work pressure; 2.Unreasonable reduction of Mechanical seal mounting,friction components not contact effective; 3. The rust of shaft sleeve surface cause rotating seal ring of mechanical seal sealing failure; 4. The delivered medium physical and chemical property causes O-ring loss elasticity; 5. The delivered medium physical and chemical property causes spring mechanical seal of loss elasticity; 6. Impurity enter friction components and damaged their surface; 7. The liquid of friction components volatilize that cause their surface burning-out;	1. Change the type of mechanical seal; 2. Reinstall; 3. Clean shaft sleeve or change their material; 4. Change material; 5. Replace or change material; 6. Filtrate or use exterior source as rinsing water; 7. Adjust rinsing medium or measure;






Bearings over heating	1.Improper centering; 2.Improper adjustment or resonance in piping; 3.Overlarge .axial force; 4.Unbalance rotor ; 5. The rigidity of foundation not enough; 6. Incorrect bearing installation or improper clearance; 7. Wore or loosened shaft; 8. Improper lubrication; 9. Oil splash ring can not get oil; 10. Poor circulation in pressure lube;	1. Readjust; 2.Readjust;reduce piping if necessary; use vibration-absorptive material;check and repair; 3. Check and adjust special working point;check capacity and running state; 4. Rebalance; 5.Strengthen the rigidity of foundation; 6. Check and choose bearing with properclearance; 7. Check and replace bearing; 8. Check the amount of oil first, too much or so little will affect operation, then check the quality of oil, especially applicable temperature; 9.Check and eliminate, the causes of can not get oil may related with oil quality, speed,wore of oil splash ring and oil circulation; 10. Check the system of pressure lube;









Vibration and noisy	1. Special working point B is not design point;not design point; low or high will cause vibration and noisy; 2. Insecure foundation; 3.Loosened anchor bolt; 4.Insecure piping supports; 5.Piping resonance; 6.Cavitations; 7. Air cell in medium or piping leakage; 8.clogged inlet or outlet of impeller; 9. Improper centering; 10. Unbalanced pump rotor or motor rotor; 11.Worn coupling pin or unhealthy coupling connection; 12. Worn bearing; 13. Shaft curved; 14. Friction in rotating elements; 15.Loosened or broken rotating elements;	1. Adjust system special working point or pump design parameters; 2. Strengthen foundation; 3. Tighten anchor bolt; 4. Strengthen piping supports; 5. Expanding the distance between pump discharge and elbow, use vibration-absorptive material in piping connection, adjust piping arrangements; 6. Rise water level, reduce suction line loss, increase suction pressure by using inlet throttle valve;improve pump cavitations performance; 7. Check and eliminate, add discharge valve; 8. Clean impeller, clean impurity of pump and piping, check strainer and suction nozzle; 9. Recentering; 10.Rebalance; 11. Replace pin, rotate coupling 180°, eliminate error of pin hole, adjust the unit to insure there is a necessary clearance in coupling; 12. Repair or replace bearing; 13. Align or replace shaft; 14. Eliminate friction; 15. Eliminate, replace worn parts;














water attack	Air in pump or piping	Evacuate air and eliminate the causes
Pump starts pumping then stops	1. Clogged in suction line or impeller; 2. Air cell in piping; 3. Lift too high （valid NPSH too low）; 4. Air enter shaft seal; 5. Water level decrease too much;	1. Clean impeller, clean impurity of strainer and suction piping; 2. Improve suction line, adjust piping arrangements, add discharge valve; 3. Increase entrance pressure, increase suction pressure by using inlet throttle valve; low the height of pump installation; change suction line if too much line loss; 4. Check pressure and amount of seal liquid if they are suitable operating requirements, replace packing or other shaft seal, check the mounting position of water seal ring; 5. Rise the lowest water level, increase entrance pressure, increase suction pressure by using inlet throttle valve;

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Relevant Information

M&W pump's first assembly team competition

SAP split case pump

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