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spEPTT scenario electric EPT EPT pump
Sequence of XSF EPT pumps are serialization merchandise of solitary phase double suction centrifugal pumps(BBl kind) whichdesigned and manufactured in totally compliance with NFPA20 quotStXiHu (West EPT) Dis.Hu (West EPT) Dis.rd for the Set up of Stationary EPTs for JCEP Protection quot. They are broadly utilised in fixed EPTfighting methods between various of EPTT and civil buildings.
Primary efficiency parameters
EPT outlet diameter Dn: a hundred~1200mm
Capacity Q: five hundred-5000GPM
EPT H: 75psi-315psi
Temperature T: normal
Description of EPT Kind
For instance:XSF100-310B
XSF:Single phase double suction spEPTT casing centrifugal pump for EPTfighting application
100:Discharge measurement
310:Typical impeller diameter
B:StXiHu (West EPT) Dis.Hu (West EPT) Dis.rd pump model with out letter exact same product but alter a diverse impeller with letter B
EPTT drawing
Structural Characteristics:
Totally meet needs
#9830Designing applies to NFPA20 stXiHu (West EPT) Dis.Hu (West EPT) Dis.rd and specification in accordance with UL448 and FM approval.
#9830Max shaft EPTT level is attained by EPT functionality alternatively of pump cavitation,which genuinely qualified for NFPA20 requirements, as effectively as ensure basic safety and dependability of pump units.
Broadly application
#9830Performance range
capability: five hundred,750,1000,1250,1500,2000, 2500,3000,4000,5000GPM head: 75psi~315psi
#9830Adaptable of electric motor and combustion motor as primary mover
#9830Varied revolving speed or performance pumps can be equipped in accordance to user’s requests Low EPT
#9830Max shaft EPTT level is closed to the stage of a hundred and fifty% rated capacity, consequently the EPTT and EPT are lower than other folks.
#9830Pressure at shut off position is modest which require reduced stress ranking of fittings or add-ons, conserve EPT for EPTT device.
#9830Single model addresses wide performance selection, no need to have to buy diverse models which rewards clientele by decreasing stock and shorten shipping.
Efficiency Knowledge
Sort | Ability (m sup3/h) | EPT (m) | Pace (r/min) | shaft EPTT (kw) | EPT EPTT (kw) | EFF(%) | NPSH(m) |
XS model | 22-16236 | 7-300 | 2900/1450/985/485 | two.nine-3737 | five.five-4000 | sixty eight-92 | 1.seven-11 |
Safety measures
1. Inspection prior to starting
Be confident to check the followings:
(1) Insure pump plate set on foundation
(two) Insure coupling and pump device alignment
(three) Insure piping related by demands
(4) Insure motor installed by Installation and operation instruction
(5) Insure the rotor of pump rotate easily (at lEPT a circle)
(6) Insure the coupling guard installed
(7) Insure the operator completely understand the basic safety specification that they must obey and the failures could be transpired
(eight) Insure the shaft seal liquid or cooling liquid guide-in by needs
(9) Insure the shaft seal put in by operation instruction
(ten) Insure the auXiHu (West EPT) Dis.liary gadget set up by operation instruction (If they eXiHu (West EPT) Dis.st)
(eleven) nsure the bearing have lubricated nicely, eEPTTly insure new pump grease or skinny oil do not minimize or go poor
(12) Insure the air trapped in pump escaped.
2. Shaft Seal
Open valves effectively for stuffing box seal
3. Air exhaust
EPT and piping must fill of medium just before commencing, there are two methods: creation of EPT or priming. If the pump operated on the suction condition, eXiHu (West EPT) Dis.t gas by bolt hole on top of the pump casing.
Observe: When generation of EPT, evacuate air by bolt hole on prime of the pump casing. When priming, open up equally facet low pressure volute chamber of pump casing and the leading plug, to get rid of pump vibration by remained air in pump.
four. Starting
(1) Shut outlet valve
(2) Open up inlet valve fully
(3) Open all auXiHu (West EPT) Dis.liary piping (cooling, heating, sealing, rinsing and lubricant liquid), and examine all capacity and strain
(four) Beginning pump after ending earlier mentioned methods
(five) When the method starting supply medium and the force studying at strain gauge rise up, open up outlet valve slowly and gradually.
Be aware: Forbid pump functioning with out liquid! Only near outlet valve when the pump commence and shutdown, or else will injury the pump by overheating.
5. Operation
(1)
Confirm functioning position
According to Q-H overall performance curve of pump, capacity Q may differ with the actual operation head. The head depended on the system head (incXiHu (West EPT) Dis.Hu (West EPT) Dis. the altitude big difference between inlet and outlet, piping, valves, radiator and so on). So the pump actually functioning point B relies upon on pump overall performance
curve Q-H and method efficiency curve Q-EPT.
After capacity settled, the shaft EPTT, effectiveness, NPSH settled as well. EPT has minimal working assortment. The minimum capacity are revealed as Qmin in Q-H performance curve. MaXiHu (West EPT) Dis.mum capacity are depended on the cross stage of pump tolerance NPSH and method valid NPSEPT. Adjust valve can modify overall performance curve Q-EPT of program, thus alter procedure performance, makes pump operation steady and substantial efficiency.
(2) Operation management
JCEP shell out consideration to followings:
a. EPT must function stably
b. Forbid pump operating without having liquid
c. To prevent medium temperature rise up, pump can not be operate EPTT interval when close outlet valve
d. EPTTly, the bearing temperature not greater than 35 ordmC of ambient temperature, complete
procedure temperature less than 100 ordmC.
e. Check oil stage often if use skinny oil. Deep groove ball bearing of grease lubrication no need program servicing.
f. Do not shut inlet valve (if it is eXiHu (West EPT) Dis.st) when pump operating.
g. Periodical inspection and commence jury pump.
h. Check out auXiHu (West EPT) Dis.liary piping whether or not linked properly.
i. Verify elastic element of coupling, if worn substitute quickly.
j. For stuffing box seal there ought to have a sligEPTT drip when running, drive stuffing box gland carefully until there is a sligEPTT drip (about fifteen-30 fall/min ).
For mechanical seal the seal leakage should decrease slowly. It is about -5drop/min following
starting couple of several hours. If the seal leakage boost progressively and achieve about 30-60drop/min, need to check or adjust mechanical seal.
six. Shutdown
Shut discharge valve.
Insure the pump device quit easily when shutdown the motor. EPT need to have a proper soon after-managing interval, reduce heat resource at this time, so that the sent medium can cool down completely and stay away from of creating any warmth inside pump.
Shut suction valve if pump end operate for a EPTT period of time of time.
Near auXiHu (West EPT) Dis.liary piping, the shaft seal should use seal lubricant even though at stopped point out. Evacuate all medium in pump and piping when freeze or stop operate for a EPTT-expression, so as not to frost crack.
seven. Storage
Each pump has inspected strictly ahead of shipping and delivery. EPTmmend to undertake adhering to procedures to shop pump.
(one) Keep new pump
If store pump at indoor, thoroughly clean dry spot and stick to the storage requirements, the EPTTest storage time is 12 months.
(two) If tools is to be stored for EPTT durations of time need to follow beneath techniques.
a. EPT must preserve in installation condition and examine operate condition often. Start off pump as soon as every month or each and every a few months (about five minutes). Examine working situation just before commencing pump to insure there is sufficient liquid.
b. Dismantled pump from piping and check it according to EPT five.one to five.4. Implement protecting agent on inside pump casing eEPTTly the gap of the impeller, apply on suction and discharge, then include the suction.
c. Procedure right after storage
Examine and maintain completely ahead of commencing pump, eEPTTly shaft seal and bearing lubricant. Reinstall all basic safety safety units in accordance to necessity before starting up.
Troubleshooting
Dilemma |
Causes |
Solution |
starting load as well higher |
one. Beginning without closing discharge valve |
1. Shut the valve |
EPTT overheating |
one.EPTT also limited |
1. Loose EPTT appropriately |
EPTT leakage abnormal |
1. EPTT worn |
1. Change EPTT |
EPT seal leakage |
1. The nominal pressure of mechanical seal lower than genuine function stress |
1. Modify the type of mechanical seal |
EPTTs in excess of heating |
1.EPTTroper cEPTTring |
one. Readjust |
Vibration and noisy |
1. EPT doing work level B is not design and style pointnot design point reduced or high will trigger vibration and noisy |
one. Alter method EPTT working stage or pump design parameters |
h2o assault |
Air in pump or piping |
Evacuate air and get rid of the causes |
EPT starts off pumping then stops |
1. Clogged in suction line or impeller |
one. Clean impeller, cleanse imEPT of strainer and suction piping |