Centrifugal Pump Horizontal Split Casing

Centrifugal Pump Horizontal Split Casing

Centrifugal pump horizontal split casing

Centrifugal horizontal split situation pump product Introduction

Centrifugal horizontal split circumstance pump is a new technology of high performance one stage double suction centrifugal pumps which mostly utilised in providing liquids of the water plant, air conditioner circulation h2o, heating pipe community system, developing h2o provide, irrigation and drainage of pump stations, electrical power crops, industrial water offer system, fireplace fighting system, shipping and delivery business and mine. It is a new substitute of SH, S, SA, SLA and SAP.

Principal performance parameters

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

Pump Supporting System and Solutions

We benefit the vitality conserving and environmental security,by analyzing the requirements of media and operation atmosphere,adopt optional combos of supplies at the elements speak to with media,insure safety,dependability,inexpensive procedure.

CZPT Drawings

Structural Attributes

Centrifugal horizontal break up scenario pump function stably with much less sound and vibration,could be correctly operate at elevating pace due to short spacing among the two aspect supports,thus they can extensively utilized. Inlet and outlet at the identical line,the same rotor of the XS pumps can be operated in reverse direction,the XS pumps works stably with considerably less sounds and vibration and can work at raising velocity owing to quick spacing in between the two aspect assistance, which make the pumps can be extensively used. The XS pumps adopt the way of middle help, thicken the pump casing, and use cooling seals and oil lubrication bearing which make XS pump suited working at 200ºC,specifically for provide heating internet technique. XS type pumps can be vertically  or horizontally mounted in accordance to distinct functioning problem, with mechanical seals or packing seals.

Overall performance Info

Sort Potential (m³/h) Head (m) Speed (r/min) shaft electricity (kw) Motor electricity (kw) EFF(%) NPSH(m)
XS model 22-16236 seven-three hundred 2900/1450/985/485 2.9-3737 5.five-4000 sixty eight-92 1.seven-11

Safety measures

one. Inspection ahead of starting up

Be sure to check the followings:

(1) Insure pump plate mounted on foundation

(two) Insure coupling and pump unit alignment

(3) Insure piping linked by needs

(four) Insure motor installed by Installation and operation instruction

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

(6) Insure the coupling guard put in

(7) Insure the operator fully realize the basic safety specification that they must obey and the failures might be transpired

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

(9) Insure the shaft seal set up by procedure instruction

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

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

(twelve) Insure the air trapped in pump escaped.


2. Shaft Seal

Open up valves effectively for stuffing box seal


three. Air exhaust

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

Observe: When development of vacuum, evacuate air by bolt hole on leading of the pump casing. When priming, open up each facet low pressure volute chamber of pump casing and the top plug, to get rid of pump vibration by remained air in pump.


four. CZPTting

(one) Close outlet valve

(2) Open inlet valve entirely

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

(four) CZPTting pump soon after finishing earlier mentioned procedures

(5) When the program beginning produce medium and the force reading through at force gauge rise up, open up outlet valve gradually.

Observe: Forbid pump working without liquid! Only near outlet valve when the pump begin and shutdown, otherwise will harm the pump by overheating.


five. Procedure


Confirm operating position


In accordance to Q-H overall performance curve of pump, ability Q differs with the actual operation head. The head depended on the program head (including the altitude distinction among inlet and outlet, piping, valves, radiator and so on). So the pump really operating position B depends on pump efficiency

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

When potential settled, the shaft electrical power, performance, NPSH settled as properly. Pump has constrained doing work range. The minimal capacity are proven as Qmin in Q-H functionality curve. Maximum capacity are depended on the cross position of pump tolerance NPSH and program valid NPSHA. Change valve can modify performance curve Q-HA of technique, thus change procedure functionality, helps make pump operation stable and high performance.

(two) Procedure management

Must spend focus to followings:

a. Pump need to perform stably

b. Forbid pump working without having liquid

c. To prevent medium temperature increase up, pump can not be run long interval when near outlet valve

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

operation temperature much less than 100ºC.

e. Check out oil amount frequently if use skinny oil. Deep groove ball bearing of grease lubrication no want regimen routine maintenance.

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

g. Periodical inspection and begin jury pump.

h. Check auxiliary piping no matter whether related properly.

i. Verify elastic component of coupling, if worn exchange quickly.

j. For stuffing box seal there need to have a slight drip when working, push stuffing box gland gently until there is a slight drip (about fifteen-thirty fall/min ).

For mechanical seal the seal leakage need to reduce slowly. It is about -5drop/min right after

starting up number of hours. If the seal leakage improve steadily and get to about thirty-60drop/min, should verify or adjust mechanical seal.


six. Shutdown

Near discharge valve.

Insure the pump unit end smoothly when shutdown the motor. Pump should have a suitable following-working interval, reduce warmth resource at this time, so that the sent medium can amazing down entirely and stay away from of creating any heat inside pump.

Close suction valve if pump end operate for a prolonged time period of time.

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


seven. Storage

Each pump has inspected strictly prior to delivery. Advise to undertake following procedures to retailer pump.

(one) Retailer new pump

If store pump at indoor, clear dry location and stick to the storage specifications, the longest storage time is twelve months.

(two) If tools is to be saved for long intervals of time ought to adhere to below techniques.

a. Pump should keep in installation point out and examine operate issue regularly. CZPTt pump once every month or every three months (about five minutes). Verify running situation before commencing pump to insure there is enough liquid.

b. Dismantled pump from piping and examine it in accordance to section 5.one to five.four. Use protecting agent on within pump casing particularly the hole of the impeller, utilize on suction and discharge, then include the suction.

c. Procedure soon after storage

Inspect and keep fully prior to starting pump, particularly shaft seal and bearing lubricant. Reinstall all security defense devices according to need ahead of commencing.






starting load too high

one. CZPTting without having closing discharge valve
two. packing also limited lead to lubricant h2o can not circulation into
3. Misguide by failing of overcurrent protector

one. Close the valve
2. Unfastened packing or check the valve of h2o seal, examine if packing ring against the nozzle of lubricant h2o,
three. Alter current limiting threshold or mend overcurrent protector.

Packing overheating

one.Packing  too limited
two.CZPT water can not stream into packing box
3. Hurt in the area of shaft or shaft sleeve

one. Free packing appropriately
2.Free packing or examine if the water seal pipe clogged
3.Restore shaft or shaft sleeve

Packing leakage too much

1. Packing worn
2. Packing way too free
three. Shaft curved or vibration
four. Mistaken packing bind
5. Unclean seal drinking water wore shaft
six. Shaft sleeve worn
7. Mistaken packing
eight.The force of seal chamber as well large or also low

one. Substitute packing
2. Tighten packing box gland or include more packing
3.Align or exchange shaft
4. Rebind packing
5.Filtrate or use exterior resource as seal drinking water, restore
six.Change shaft sleeve
7.Exchange packing
8. Change the force and capability of seal liquid or use a sealing liquid from an external source.

CZPT seal leakage

1. The nominal force of mechanical seal reduced than genuine perform pressure
2.Unreasonable reduction of CZPT seal mounting,friction factors not speak to efficient
3. The rust of shaft sleeve floor result in rotating seal ring of mechanical seal sealing failure
four. The sent medium bodily and chemical house brings about O-ring reduction elasticity
five. The sent medium actual physical and chemical property triggers spring mechanical seal of loss elasticity
 6. Impurity enter friction components and destroyed their surface
7. The liquid of friction components volatilize that lead to their surface area burning-out

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

Bearings more than heating

one.Poor centering
two.Incorrect adjustment or resonance in piping
three.Overlarge .axial force
four.Unbalance rotor
five. The rigidity of basis not ample
six. Incorrect bearing set up or poor clearance
7. Wore or loosened shaft
8. Incorrect lubrication
nine. Oil splash ring can not get oil
10. Very poor circulation in pressure lube

one. Readjust
2.Readjustreduce piping if needed use vibration-absorptive materialcheck and restore
3. Check and alter unique doing work pointcheck capacity and running condition
four. Rebalance
5.CZPTen the rigidity of foundation
6. Verify and decide on bearing with properclearance
7. Examine and substitute bearing
eight. Examine the quantity of oil first, as well a lot or so tiny will have an effect on operation, then check out the high quality of oil, specially relevant temperature
nine.Verify and eliminate, the causes of can not get oil might connected with oil good quality, velocity,wore of oil splash ring and oil circulation
ten. Check out the technique of pressure lube

Vibration and noisy

1. Unique operating point B is not design and style pointnot design and style point reduced or large will result in vibration and noisy
2. Insecure basis
three.Loosened anchor bolt
four.Insecure piping supports
5.Piping resonance
seven. Air cell in medium or piping leakage
8.clogged inlet or outlet of impeller
nine. Poor centering
ten. Unbalanced pump rotor or motor rotor
11.Worn coupling pin or unhealthy coupling relationship
12. Worn bearing
thirteen. Shaft curved
14. Friction in rotating factors
15.Loosened or damaged rotating factors

one. Adjust technique special doing work level or pump layout parameters
two. CZPTen foundation
3. Tighten anchor bolt
four. CZPTen piping supports
5. Growing the distance amongst pump discharge and elbow, use vibration-absorptive materials in piping link, change piping arrangements
6. Increase drinking water amount, lessen suction line decline, boost suction stress by making use of inlet throttle valveimprove pump cavitations functionality
seven. Verify and eliminate, insert discharge valve
eight. Cleanse impeller, cleanse impurity of pump and piping, check strainer and suction nozzle
9. Recentering
11. Substitute pin, rotate coupling 180°, eliminate mistake of pin  hole, modify the unit to insure there is a essential clearance in coupling
twelve. Mend or replace bearing
13. Align or substitute shaft
fourteen. Get rid of friction
fifteen. Eliminate, exchange worn elements

drinking water assault

Air in pump or piping

Evacuate air and eradicate the brings about

Pump commences pumping then stops

1. Clogged in suction line or impeller
2.  Air  cell in piping
3. Carry way too large  (legitimate NPSH as well minimal)
four. Air enter shaft seal
5. Water stage decrease too considerably

1. Thoroughly clean impeller, clear impurity of strainer and suction piping
2. Enhance suction line, change piping preparations, add discharge valve
three. Boost entrance force, improve suction pressure by using inlet throttle valve minimal the height of pump installation alter suction line if as well a lot line reduction
4. Verify strain and volume of seal liquid if they are appropriate working specifications, change packing or other shaft seal, check the mounting place of drinking water seal ring
five. Rise the least expensive water degree, improve entrance stress, enhance   suction   pressure by making use of   inlet   throttle   valve


Centrifugal Pump Horizontal Split Casing