Horizontal Split Case Base Mounted Pumps

Horizontal Split Case Base Mounted Pumps

horizontal break up case base mounted pumps

break up case  pump product Introduction

split case pump is a new generation of higher efficiency one stage double suction centrifugal pumps which largely employed in delivering liquids of the water plant, air conditioner circulation water, heating pipe network technique, creating water provide, irrigation and drainage of pump stations, electricity crops, industrial water provide method, fire combating system, shipping sector and mine.

Principal functionality parameters

Diameter of pump outlet: DN80 to DN900
Pump Potential: Q: 22-16236m3/h
Pump elevate head range: H:7-300m
Pump doing work force: P≤5Mpa
Pump doing work temperature: T-20-200deg C
Pump working voltage: 380V to 10000V, 50Hz & 60Hz

Pump Supporting Program and Services

We value the energy conserving and environmental protection,by analyzing the demands of media and operation atmosphere,undertake optional combos of supplies at the components speak to with media,insure protection,reliability,inexpensive operation.

CZPT Drawings

Structural Functions

break up circumstance pump work stably with considerably less noise and vibration,may possibly be properly perform at boosting velocity because of to short spacing in between each aspect supports,therefore they can widely utilized. Inlet and outlet at the exact same line,the identical rotor of the XS pumps can be operated in reverse route,the XS pumps performs stably with significantly less sound and vibration and can perform at elevating speed owing to quick spacing amongst the two facet support, which make the pumps can be broadly utilized. The XS pumps undertake the way of middle assistance, thicken the pump casing, and use cooling seals and oil lubrication bearing which make XS pump suitable doing work at 200ºC,particularly for source heating web program. XS type pumps can be vertically  or horizontally mounted in accordance to various working issue, with mechanical seals or packing seals.

Efficiency Information

Sort Capacity (m³/h) CZPT (m) Speed (r/min) shaft electrical power (kw) Motor energy (kw) EFF(%) NPSH(m)
XS model 22-16236 7-300 2900/1450/985/485 2.9-3737 five.five-4000 sixty eight-92 one.7-11


one. Inspection prior to beginning

Be certain to verify the followings:

(one) Insure pump plate fixed on basis

(2) Insure coupling and pump unit alignment

(three) Insure piping connected by needs

(four) Insure motor mounted by Set up and operation instruction

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

(6) Insure the coupling guard put in

(seven) Insure the operator entirely realize the protection specification that they ought to obey and the failures might be occurred

(eight) Insure the shaft seal liquid or cooling liquid lead-in by demands

(9) Insure the shaft seal installed by procedure instruction

(ten) Insure the auxiliary system set up by operation instruction (If they exist)

(11) nsure the bearing have lubricated properly, specifically insure new pump grease or skinny oil do not lessen or go undesirable

(12) Insure the air trapped in pump escaped.


two. Shaft Seal

Open up valves appropriately for stuffing box seal


three. Air exhaust

Pump and piping ought to fill of medium before starting, there are two strategies: creation of vacuum or priming. If the pump operated on the suction point out, exit gasoline by bolt gap on prime of the pump casing.

Note: When creation of vacuum, evacuate air by bolt gap on prime of the pump casing. When priming, open up each side minimal force volute chamber of pump casing and the leading plug, to get rid of pump vibration by remained air in pump.


four. CZPTting

(one) Near outlet valve

(2) Open inlet valve entirely

(three) Open up all auxiliary piping (cooling, heating, sealing, rinsing and lubricant liquid), and check out all ability and stress

(four) CZPTting pump following finishing previously mentioned methods

(five) When the program beginning produce medium and the strain reading at stress gauge increase up, open up outlet valve slowly and gradually.

Be aware: Forbid pump functioning CZPT liquid! Only near outlet valve when the pump start and shutdown, in any other case will injury the pump by overheating.


five. Procedure


Affirm functioning stage


In accordance to Q-H performance curve of pump, potential Q may differ with the real procedure head. The head depended on the system head (including the altitude big difference between inlet and outlet, piping, valves, radiator and so on). So the pump truly working position B depends on pump efficiency

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

After capacity settled, the shaft energy, efficiency, NPSH settled as well. Pump has constrained working variety. The minimum capability are proven as Qmin in Q-H efficiency curve. Highest ability are depended on the cross position of pump tolerance NPSH and system valid NPSHA. Modify valve can adjust performance curve Q-HA of system, thereby modify procedure efficiency, helps make pump procedure secure and substantial performance.

(two) Operation administration

Should shell out consideration to followings:

a. Pump ought to work stably

b. Forbid pump running CZPT liquid

c. To avoid medium temperature rise up, pump can not be run extended period when near outlet valve

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

procedure temperature less than 100ºC.

e. Check oil amount frequently if use slim oil. Deep groove ball bearing of grease lubrication no need to have program maintenance.

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

g. Periodical inspection and start jury pump.

h. Check out auxiliary piping regardless of whether linked well.

i. Check elastic factor of coupling, if worn replace right away.

j. For stuffing box seal there must have a slight drip when working, drive stuffing box gland gently till there is a slight drip (about 15-30 drop/min ).

For mechanical seal the seal leakage should minimize slowly. It is about -5drop/min after

commencing couple of hours. If the seal leakage increase steadily and get to about 30-60drop/min, must examine or adjust mechanical seal.


six. Shutdown

Near discharge valve.

Insure the pump unit cease easily when shutdown the motor. Pump should have a correct right after-operating period, cut warmth resource at this time, so that the shipped medium can great down entirely and avoid of generating any heat inside pump.

Shut suction valve if pump stop function for a prolonged period of time of time.

Near auxiliary piping, the shaft seal need to use seal lubricant even though at stopped point out. Evacuate all medium in pump and piping when freeze or cease function for a lengthy-phrase, so as not to frost crack.


7. Storage

CZPTy pump has inspected strictly before delivery. CZPTmmend to undertake adhering to methods to store pump.

(one) Keep new pump

If shop pump at indoor, clean dry location and comply with the storage specifications, the longest storage time is 12 months.

(2) If gear is to be stored for lengthy durations of time should comply with below procedures.

a. Pump should keep in set up point out and inspect work situation often. CZPTt pump once every single thirty day period or every three months (about five minutes). Check managing problem before starting pump to insure there is enough liquid.

b. Dismantled pump from piping and examine it in accordance to area five.one to five.4. Apply protective agent on inside pump casing specially the gap of the impeller, utilize on suction and discharge, then cover the suction.

c. Operation after storage

Inspect and maintain totally just before starting up pump, especially shaft seal and bearing lubricant. Reinstall all safety safety gadgets in accordance to requirement just before beginning.






starting up load as well substantial

1. CZPTting CZPT closing discharge valve
2. packing too tight guide to lubricant h2o can not stream into
three. Misguide by failing of overcurrent protector

1. Shut the valve
2. Free packing or check the valve of water seal, verify if packing ring towards the nozzle of lubricant water,
3. Adjust existing limiting threshold or restore overcurrent protector.

Packing overheating

one.Packing  too restricted
two.Cooling water can not flow into packing box
3. Hurt in the surface of shaft or shaft sleeve

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

Packing leakage abnormal

one. Packing worn
two. Packing as well loose
three. Shaft curved or vibration
4. Wrong packing bind
five. Unclean seal water wore shaft
6. Shaft sleeve worn
seven. Incorrect packing
8.The force of seal chamber as well high or also minimal

one. Exchange packing
two. Tighten packing box gland or incorporate more packing
three.Align or change shaft
four. Rebind packing
5.Filtrate or use exterior supply as seal water, fix
six.Substitute shaft sleeve
7.Change packing
eight. Modify the stress and potential of seal liquid or use a sealing liquid from an external resource.

Mechanical seal leakage

one. The nominal stress of mechanical seal reduced than true work strain
two.Unreasonable reduction of Mechanical seal mounting,friction parts not speak to powerful
3. The rust of shaft sleeve surface area result in rotating seal ring of mechanical seal sealing failure
4. The sent medium actual physical and chemical home brings about O-ring reduction elasticity
5. The shipped medium bodily and chemical residence causes spring mechanical seal of loss elasticity
 6. Impurity enter friction elements and broken their area
7. The liquid of friction parts volatilize that result in their surface burning-out

1. Modify the variety of mechanical seal
2. Reinstall
three. Clear shaft sleeve or alter their substance
4. Modify content
five. Replace or change materials
6. Filtrate or use exterior resource as rinsing h2o
seven. Alter rinsing medium or evaluate

CZPTs over heating

1.Poor centering
two.Incorrect adjustment or resonance in piping
three.Overlarge .axial pressure
four.Unbalance rotor
five. The rigidity of foundation not enough
six. Incorrect bearing set up or poor clearance
seven. Wore or loosened shaft
8. Poor lubrication
9. Oil splash ring can not get oil
10. Inadequate circulation in force lube

one. Readjust
2.Readjustreduce piping if essential use vibration-absorptive materialcheck and mend
three. Examine and change special doing work pointcheck ability and running state
4. Rebalance
5.Improve the rigidity of basis
6. Check and pick bearing with properclearance
7. Examine and replace bearing
8. Check out the volume of oil very first, way too a lot or so minor will impact procedure, then check out the high quality of oil, particularly relevant temperature
9.Verify and eliminate, the triggers of can not get oil may related with oil top quality, pace,wore of oil splash ring and oil circulation
10. Verify the system of strain lube

Vibration and noisy

1. Particular functioning level B is not style pointnot design and style position low or higher will trigger vibration and noisy
2. Insecure basis
three.Loosened anchor bolt
four.Insecure piping supports
five.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
11.Worn coupling pin or harmful coupling link
twelve. Worn bearing
13. Shaft curved
14. Friction in rotating factors
15.Loosened or broken rotating components

1. Modify system unique working point or pump style parameters
two. Bolster basis
three. Tighten anchor bolt
four. Reinforce piping supports
five. Increasing the length in between pump discharge and elbow, use vibration-absorptive materials in piping relationship, modify piping preparations
six. Increase water amount, lessen suction line decline, enhance suction force by employing inlet throttle valveimprove pump cavitations functionality
7. Check out and get rid of, incorporate discharge valve
8. Clear impeller, clean impurity of pump and piping, verify strainer and suction nozzle
9. Recentering
11. Change pin, rotate coupling 180°, eliminate error of pin  hole, alter the unit to insure there is a required clearance in coupling
twelve. Fix or exchange bearing
thirteen. Align or substitute shaft
14. Remove friction
15. Eliminate, change worn elements

h2o attack

Air in pump or piping

Evacuate air and remove the causes

Pump starts off pumping then stops

1. Clogged in suction line or impeller
2.  Air  cell in piping
3. Carry too higher  (legitimate NPSH as well low)
four. Air enter shaft seal
5. Drinking water level decrease too much

1. Clear impeller, thoroughly clean impurity of strainer and suction piping
2. Boost suction line, alter piping preparations, add discharge valve
3. Boost entrance pressure, boost suction force by making use of inlet throttle valve low the peak of pump installation modify suction line if as well much line loss
4. Verify force and sum of seal liquid if they are appropriate running demands, exchange packing or other shaft seal, check out the mounting situation of water seal ring
five. Increase the lowest h2o stage, improve entrance pressure, boost   suction   pressure by using   inlet   throttle   valve


Horizontal Split Case Base Mounted Pumps