Single Stage Horizontal Split Case Pumps

Single Stage Horizontal Split Case Pumps


Single stage  horizontal break up case pumps

horizontal break up situation pump product Introduction

Split circumstance pump is a new generation of higher effectiveness single stage double suction centrifugal pumps which primarily used in offering liquids of the drinking water plant, air conditioner circulation water, heating pipe network technique, building h2o supply, irrigation and drainage of pump stations, energy vegetation, industrial h2o offer method, fire preventing technique, delivery market and mine.

Primary efficiency parameters

Diameter of pump outlet: DN80 to DN900
Pump Capability: Q: 22-16236m3/h
Pump carry head assortment: H:seven-300m
Pump working force: P≤5Mpa
Pump functioning temperature: T-20-200deg C
Pump working voltage: 380V to 10000V, 50Hz & 60Hz

Pump Supporting System and Companies

We benefit the power conserving and environmental safety,by examining the demands of media and operation atmosphere,adopt optional combos of resources at the elements get in touch with with media,insure stability,dependability,affordable operation.

CZPT Drawings

Structural Characteristics

Split scenario pump work stably with significantly less noise and vibration,might be correctly operate at increasing pace because of to brief spacing amongst the two side supports,as a result they can broadly employed. Inlet and outlet at the very same line,the exact same rotor of the XS pumps can be operated in reverse course,the XS pumps operates stably with considerably less sounds and vibration and can function at boosting velocity due to brief spacing amongst each facet assist, which make the pumps can be commonly employed. The XS pumps adopt the way of center assist, thicken the pump casing, and use cooling seals and oil lubrication bearing which make XS pump suitable doing work at 200ºC,particularly for offer heating internet system. XS type pumps can be vertically  or horizontally mounted in accordance to different working situation, with mechanical seals or packing seals.

Performance Information

Kind Capability (m³/h) Head (m) Speed (r/min) shaft energy (kw) Motor energy (kw) EFF(%) NPSH(m)
XS design 22-16236 7-three hundred 2900/1450/985/485 2.nine-3737 5.5-4000 sixty eight-92

Safety measures

1. Inspection just before starting up

Be sure to check the followings:

(1) Insure pump plate mounted on basis

(2) Insure coupling and pump unit alignment

(three) Insure piping linked by requirements

(4) Insure motor put in by Installation and procedure instruction

(5) Insure the rotor of pump rotate very easily (at minimum a circle)

(6) Insure the coupling guard installed

(seven) Insure the operator completely realize the protection specification that they need to obey and the failures may possibly be transpired

(8) Insure the shaft seal liquid or cooling liquid guide-in by specifications

(9) Insure the shaft seal mounted by procedure instruction

(10) Insure the auxiliary device put in by operation instruction (If they exist)

(eleven) nsure the bearing have lubricated nicely, especially insure new pump grease or slim oil do not lessen or go bad

(12) Insure the air trapped in pump escaped.


2. Shaft Seal

Open valves appropriately for stuffing box seal


three. Air exhaust

Pump and piping should fill of medium before commencing, there are two methods: development of vacuum or priming. If the pump operated on the suction point out, exit fuel by bolt hole on best of the pump casing.

Observe: When development of vacuum, evacuate air by bolt gap on best of the pump casing. When priming, open the two facet minimal pressure volute chamber of pump casing and the prime plug, to get rid of pump vibration by remained air in pump.


4. CZPTting

(1) Shut outlet valve

(2) Open up inlet valve entirely

(3) Open all auxiliary piping (cooling, heating, sealing, rinsing and lubricant liquid), and check all capability and force

(four) CZPTting pump right after ending above methods

(five) When the technique beginning provide medium and the force reading at pressure gauge rise up, open up outlet valve gradually.

Notice: Forbid pump operating without having liquid! Only near outlet valve when the pump start off and shutdown, normally will damage the pump by overheating.


5. Operation


Verify functioning point


In accordance to Q-H functionality curve of pump, capability Q differs with the true procedure head. The head depended on the technique head (such as the altitude big difference in between inlet and outlet, piping, valves, radiator and so on). So the pump in fact running position B depends on pump functionality

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

Once capability settled, the shaft electrical power, performance, NPSH settled as nicely. Pump has constrained operating assortment. The minimum ability are shown as Qmin in Q-H performance curve. Highest potential are depended on the cross point of pump tolerance NPSH and program legitimate NPSHA. Adjust valve can adjust efficiency curve Q-HA of program, thereby adjust procedure performance, can make pump operation secure and large performance.

(two) Operation management

Need to shell out attention to followings:

a. Pump need to function stably

b. Forbid pump working without liquid

c. To avoid medium temperature increase up, pump can not be run long period of time when shut outlet valve

d. CZPTly, the bearing temperature not larger than 35ºC of ambient temperature, complete

operation temperature considerably less than 100ºC.

e. Verify oil degree often if use skinny oil. Deep groove ball bearing of grease lubrication no need regimen maintenance.

f. Do not shut inlet valve (if it is exist) when pump functioning.

g. Periodical inspection and begin jury pump.

h. Examine auxiliary piping regardless of whether related well.

i. Check elastic component of coupling, if worn replace quickly.

j. For stuffing box seal there must have a slight drip when working, drive stuffing box gland carefully till there is a slight drip (about 15-thirty drop/min ).

For mechanical seal the seal leakage ought to reduce gradually. It is about -5drop/min soon after

starting number of hrs. If the seal leakage boost progressively and get to about thirty-60drop/min, should check out or modify mechanical seal.


6. Shutdown

Close discharge valve.

Insure the pump unit cease effortlessly when shutdown the motor. Pump should have a suitable soon after-managing time period, minimize heat source at this time, so that the delivered medium can cool down fully and avoid of generating any warmth inside of pump.

Shut suction valve if pump stop operate for a extended period of time.

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


7. Storage

Each pump has inspected strictly ahead of shipping. Suggest to adopt subsequent methods to store pump.

(one) Retailer new pump

If retailer pump at indoor, thoroughly clean dry location and comply with the storage needs, the longest storage time is twelve months.

(2) If tools is to be stored for lengthy intervals of time should adhere to under methods.

a. Pump should keep in set up state and examine function issue often. CZPTt pump when every thirty day period or every a few months (about five minutes). Verify working condition before beginning pump to insure there is adequate liquid.

b. Dismantled pump from piping and check out it according to area to 5.four. Apply protective agent on inside of pump casing specifically the hole of the impeller, utilize on suction and discharge, then go over the suction.

c. Procedure right after storage

Inspect and keep fully prior to commencing pump, specially shaft seal and bearing lubricant. Reinstall all security security units according to prerequisite before starting.




Leads to


beginning load as well higher

1. CZPTting without having closing discharge valve
2. packing also restricted guide to lubricant h2o can not movement into
3. Misguide by failing of overcurrent protector

one. Close the valve
two. Unfastened packing or verify the valve of drinking water seal, check if packing ring from the nozzle of lubricant water,
3. Adjust existing restricting threshold or fix overcurrent protector.

Packing overheating

one.Packing  too limited
2.CZPT water can not movement into packing box
3. Damage in the surface area of shaft or shaft sleeve

one. Loose packing effectively
2.Unfastened packing or verify if the water seal pipe clogged
three.Repair shaft or shaft sleeve

Packing leakage too much

one. Packing worn
2. Packing also unfastened
three. Shaft curved or vibration
four. Mistaken packing bind
five. Unclean seal h2o wore shaft
six. Shaft sleeve worn
7. Mistaken packing
8.The force of seal chamber as well substantial or way too minimal

one. Exchange packing
2. Tighten packing box gland or add far more packing
three.Align or exchange shaft
four. Rebind packing
5.Filtrate or use exterior supply as seal drinking water, restore
6.Change shaft sleeve
seven.Change packing
eight. Change the force and capability of seal liquid or use a sealing liquid from an external supply.

CZPT seal leakage

one. The nominal stress of mechanical seal reduced than genuine perform strain
two.Unreasonable reduction of CZPT seal mounting,friction components not contact successful
3. The rust of shaft sleeve surface trigger rotating seal ring of mechanical seal sealing failure
four. The delivered medium physical and chemical property triggers O-ring loss elasticity
five. The delivered medium physical and chemical property brings about spring mechanical seal of loss elasticity
 6. Impurity enter friction parts and damaged their surface
7. The liquid of friction components volatilize that cause their floor burning-out

one. Change the variety of mechanical seal
2. Reinstall
3. Clean shaft sleeve or adjust their materials
4. Change substance
5. Replace or modify substance
six. Filtrate or use exterior supply as rinsing water
7. Change rinsing medium or evaluate

Bearings over heating

one.Improper centering
two.Improper adjustment or resonance in piping
three.Overlarge .axial pressure
four.Unbalance rotor
5. The rigidity of basis not sufficient
6. Incorrect bearing installation or inappropriate clearance
7. Wore or loosened shaft
8. Improper lubrication
9. Oil splash ring can not get oil
ten. Bad circulation in strain lube

one. Readjust
two.Readjustreduce piping if required use vibration-absorptive materialcheck and fix
3. Check out and modify unique doing work pointcheck potential and operating state
four. Rebalance
five.CZPTen the rigidity of basis
six. Verify and choose bearing with properclearance
7. Verify and change bearing
8. Examine the sum of oil very first, also a lot or so small will have an effect on procedure, then verify the quality of oil, specifically relevant temperature
9.Check and eliminate, the triggers of can not get oil could connected with oil high quality, speed,wore of oil splash ring and oil circulation
10. Verify the method of pressure lube

Vibration and noisy

1. Special working position B is not design and style pointnot style level reduced or large will result in vibration and noisy
2. Insecure basis
3.Loosened anchor bolt
4.Insecure piping supports
5.Piping resonance
7. Air mobile in medium or piping leakage
8.clogged inlet or outlet of impeller
9. Improper centering
10. Unbalanced pump rotor or motor rotor
eleven.Worn coupling pin or harmful coupling relationship
12. Worn bearing
thirteen. Shaft curved
14. Friction in rotating factors
15.Loosened or damaged rotating aspects

1. Adjust program specific doing work point or pump layout parameters
two. CZPTen foundation
three. Tighten anchor bolt
four. CZPTen piping supports
five. Increasing the distance between pump discharge and elbow, use vibration-absorptive material in piping link, alter piping arrangements
6. Increase h2o level, reduce suction line loss, increase suction strain by making use of inlet throttle valveimprove pump cavitations overall performance
7. Examine and remove, include discharge valve
8. Clear impeller, thoroughly clean impurity of pump and piping, check strainer and suction nozzle
9. Recentering
eleven. Replace pin, rotate coupling 180°, eliminate error of pin  hole, modify the unit to insure there is a required clearance in coupling
twelve. Mend or replace bearing
13. Align or exchange shaft
14. Eradicate friction
15. Remove, change worn parts

h2o attack

Air in pump or piping

Evacuate air and get rid of the leads to

Pump starts pumping then stops

1. Clogged in suction line or impeller
2.  Air  cell in piping
3. Elevate also large  (legitimate NPSH as well lower)
4. Air enter shaft seal
5. Water stage lower also much

one. Cleanse impeller, clean impurity of strainer and suction piping
two. Improve suction line, adjust piping arrangements, add discharge valve
3. Boost entrance force, boost suction force by utilizing inlet throttle valve minimal the height of pump set up modify suction line if too significantly line loss
4. Check force and sum of seal liquid if they are appropriate working demands, substitute packing or other shaft seal, check out the mounting situation of water seal ring
5. Increase the cheapest water amount, boost entrance strain, increase   suction   pressure by utilizing   inlet   throttle   valve


Single Stage Horizontal Split Case Pumps


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