Horizontal Centrifugal Split Casing Pump

Horizontal Centrifugal Split Casing Pump

Horizontal centrifugal split casing pump

Horizontal centrifugal break up casing pump merchandise Introduction

Horizontal centrifugal break up casing pump is a new technology of high performance one stage double suction centrifugal pumps which mostly utilized in offering liquids of the drinking water plant, air conditioner circulation h2o, heating pipe community method, constructing drinking water provide, irrigation and drainage of pump stations, electrical power crops, industrial h2o source method, fire battling system, shipping and delivery sector and mine. It is a new substitute of SH, S, SA, SLA and SAP.

Primary overall performance parameters

Diameter of pump outlet: DN80 to DN900
Pump Capacity: Q: 22-16236m3/h
Pump lift head range: H:seven-300m
Pump working 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 strength saving and environmental security,by examining the specifications of media and operation atmosphere,adopt optional mixtures of resources at the parts make contact with with media,insure security,reliability,cost-effective procedure.

CZPT Drawings

Structural Characteristics

Centrifugal horizontal break up circumstance pump operate stably with significantly less noise and vibration,may be properly work at boosting pace because of to short spacing among the two facet supports,thus they can commonly utilized. Inlet and outlet at the very same line,the exact same rotor of the XS pumps can be operated in reverse direction,the XS pumps works stably with less sound and vibration and can perform at boosting speed due to brief spacing in between the two aspect assistance, which make the pumps can be broadly utilized. 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 appropriate doing work at 200ºC,specifically for source heating net program. XS kind pumps can be vertically  or horizontally mounted according to different operating problem, with mechanical seals or packing seals.

Functionality Info

Sort Ability (m³/h) Head (m) Velocity (r/min) shaft power (kw) Motor energy (kw) EFF(%) NPSH(m)
XS product 22-16236 7-300 2900/1450/985/485 two.nine-3737 five.5-4000 68-ninety two one.7-11


1. Inspection ahead of starting up

Be certain to check the followings:

(1) Insure pump plate fixed on foundation

(two) Insure coupling and pump unit alignment

(three) Insure piping linked by requirements

(4) Insure motor mounted by Installation and operation instruction

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

(six) Insure the coupling guard set up

(seven) Insure the operator entirely recognize the security specification that they should obey and the failures may be happened

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

(9) Insure the shaft seal put in by operation instruction

(ten) Insure the auxiliary system put in by procedure instruction (If they exist)

(11) nsure the bearing have lubricated well, specially insure new pump grease or slim oil do not lessen or go negative

(12) Insure the air trapped in pump escaped.


two. Shaft Seal

Open valves correctly for stuffing box seal


3. Air exhaust

Pump and piping should fill of medium prior to beginning, there are two strategies: generation of vacuum or priming. If the pump operated on the suction point out, exit fuel by bolt hole on leading of the pump casing.

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


four. CZPTting

(1) Close outlet valve

(2) Open inlet valve fully

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

(four) CZPTting pump soon after finishing earlier mentioned techniques

(5) When the technique starting provide medium and the force studying at pressure gauge rise up, open up outlet valve slowly.

Note: Forbid pump running with out liquid! Only near outlet valve when the pump start and shutdown, in any other case will injury the pump by overheating.


5. Procedure


Affirm functioning point


According to Q-H performance curve of pump, capacity Q differs with the real procedure head. The head depended on the program head (such as the altitude big difference between inlet and outlet, piping, valves, radiator and so on). So the pump truly functioning level B is dependent on pump functionality

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

After ability settled, the shaft electricity, effectiveness, NPSH settled as well. Pump has minimal functioning assortment. The least capability are shown as Qmin in Q-H overall performance curve. Maximum ability are depended on the cross level of pump tolerance NPSH and technique valid NPSHA. Change valve can change overall performance curve Q-HA of technique, thus modify procedure performance, makes pump procedure secure and high effectiveness.

(2) Operation management

Must spend attention to followings:

a. Pump need to work stably

b. Forbid pump running with no liquid

c. To avert medium temperature increase up, pump can not be run lengthy period when close outlet valve

d. CZPTly, the bearing temperature not higher than 35ºC of ambient temperature, absolute

procedure temperature less than 100ºC.

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

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

g. Periodical inspection and begin jury pump.

h. Check out auxiliary piping whether related well.

i. Examine elastic component of coupling, if worn replace immediately.

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

For mechanical seal the seal leakage ought to lessen slowly. It is about -5drop/min following

commencing couple of hrs. If the seal leakage improve steadily and reach about thirty-60drop/min, need to check out or modify mechanical seal.


6. Shutdown

Shut discharge valve.

Insure the pump unit cease efficiently when shutdown the motor. Pump ought to have a suitable after-operating period, minimize heat resource at this time, so that the sent medium can cool down entirely and steer clear of of producing any warmth inside pump.

Close suction valve if pump stop work for a lengthy interval of time.

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


7. Storage

Each pump has inspected strictly ahead of shipping. Advocate to adopt following techniques to keep pump.

(one) Keep new pump

If retailer pump at indoor, cleanse dry place and stick to the storage requirements, the longest storage time is twelve months.

(two) If gear is to be saved for long intervals of time need to comply with below procedures.

a. Pump need to keep in set up point out and examine perform issue often. CZPTt pump as soon as every thirty day period or each a few months (about five minutes). Check running issue ahead of starting pump to insure there is enough liquid.

b. Dismantled pump from piping and check out it in accordance to part five.one to five.four. Implement protecting agent on inside of pump casing particularly the hole of the impeller, utilize on suction and discharge, then protect the suction.

c. Operation after storage

Examine and keep entirely just before commencing pump, particularly shaft seal and bearing lubricant. Reinstall all basic safety defense gadgets according to requirement ahead of starting up.






beginning load as well high

1. CZPTting with out closing discharge valve
two. packing way too limited lead to lubricant drinking water can not flow into
three. Misguide by failing of overcurrent protector

one. Close the valve
two. Unfastened packing or check out the valve of water seal, examine if packing ring from the nozzle of lubricant water,
3. Alter current restricting threshold or repair overcurrent protector.

Packing overheating

1.Packing  too limited
2.CZPT drinking water can not movement into packing box
three. Harm in the surface area of shaft or shaft sleeve

1. Unfastened packing correctly
2.Unfastened packing or check if the h2o seal pipe clogged
3.Fix shaft or shaft sleeve

Packing leakage excessive

one. Packing worn
2. Packing also loose
three. Shaft curved or vibration
4. Wrong packing bind
5. Unclean seal drinking water wore shaft
six. Shaft sleeve worn
seven. Incorrect packing
eight.The force of seal chamber too higher or way too minimal

1. Substitute packing
two. Tighten packing box gland or incorporate much more packing
three.Align or exchange shaft
four. Rebind packing
five.Filtrate or use exterior source as seal drinking water, repair
six.Exchange shaft sleeve
7.Replace packing
eight. Alter the force and capacity of seal liquid or use a sealing liquid from an exterior source.

CZPT seal leakage

1. The nominal strain of mechanical seal reduce than real operate stress
two.Unreasonable reduction of CZPT seal mounting,friction factors not make contact with successful
3. The rust of shaft sleeve floor result in rotating seal ring of mechanical seal sealing failure
4. The sent medium actual physical and chemical property triggers O-ring loss elasticity
five. The delivered medium actual physical and chemical property leads to spring mechanical seal of decline elasticity
 6. Impurity enter friction components and damaged their area
7. The liquid of friction components volatilize that result in their surface area burning-out

one. Change the kind of mechanical seal
2. Reinstall
3. Clean shaft sleeve or modify their content
four. Change substance
five. Change or change materials
6. Filtrate or use exterior supply as rinsing drinking water
7. Modify rinsing medium or evaluate

Bearings over heating

1.Improper centering
two.Improper adjustment or resonance in piping
three.Overlarge .axial force
four.Unbalance rotor
5. The rigidity of foundation not enough
six. Incorrect bearing set up or inappropriate clearance
seven. Wore or loosened shaft
8. Incorrect lubrication
nine. Oil splash ring can not get oil
ten. Bad circulation in force lube

1. Readjust
two.Readjustreduce piping if essential use vibration-absorptive materialcheck and mend
3. Check and modify unique doing work pointcheck potential and running condition
4. Rebalance
five.CZPTen the rigidity of foundation
six. Examine and select bearing with properclearance
seven. Check and replace bearing
8. Check out the quantity of oil first, as well significantly or so tiny will influence procedure, then verify the top quality of oil, especially applicable temperature
9.Check and remove, the causes of can not get oil may related with oil top quality, speed,wore of oil splash ring and oil circulation
ten. Check out the method of force lube

Vibration and noisy

1. Particular doing work point B is not design and style pointnot style stage reduced or substantial will cause vibration and noisy
2. Insecure foundation
3.Loosened anchor bolt
4.Insecure piping supports
5.Piping resonance
seven. Air mobile in medium or piping leakage
eight.clogged inlet or outlet of impeller
nine. Incorrect centering
ten. Unbalanced pump rotor or motor rotor
eleven.Worn coupling pin or harmful coupling link
twelve. Worn bearing
thirteen. Shaft curved
14. Friction in rotating components
fifteen.Loosened or damaged rotating factors

one. Alter program unique functioning stage or pump design parameters
2. CZPTen basis
three. Tighten anchor bolt
4. CZPTen piping supports
5. Increasing the length amongst pump discharge and elbow, use vibration-absorptive content in piping relationship, change piping preparations
six. Increase drinking water level, lessen suction line decline, increase suction stress by employing inlet throttle valveimprove pump cavitations overall performance
seven. Check and eliminate, insert discharge valve
8. Cleanse impeller, clean impurity of pump and piping, verify strainer and suction nozzle
nine. Recentering
11. Exchange pin, rotate coupling 180°, eradicate mistake of pin  hole, adjust the device to insure there is a necessary clearance in coupling
12. Restore or substitute bearing
thirteen. Align or substitute shaft
14. Eliminate friction
fifteen. Eliminate, replace worn elements

h2o attack

Air in pump or piping

Evacuate air and eradicate the brings about

Pump starts off pumping then stops

one. Clogged in suction line or impeller
2.  Air  cell in piping
3. Raise as well high  (valid NPSH as well reduced)
four. Air enter shaft seal
5. H2o amount lower as well considerably

one. Clear impeller, cleanse impurity of strainer and suction piping
2. Improve suction line, modify piping preparations, include discharge valve
3. Boost entrance pressure, enhance suction force by using inlet throttle valve reduced the height of pump set up alter suction line if also much line reduction
4. Examine force and amount of seal liquid if they are suitable working demands, exchange packing or other shaft seal, check the mounting situation of water seal ring
five. Increase the most affordable h2o level, increase entrance pressure, increase   suction   pressure by employing   inlet   throttle   valve


Horizontal Centrifugal Split Casing Pump