CHT Series high-pressure boiler feed pump

●      CHTC

Catridge design-quick-out units allows time-saving overhauls(barrel remains in the piping system)

Pressure boundary amenable to 100% volumetric examination.

Computer-aided barrel design allow wing for pressure and temperature transients.

Axial-thrust balancing piston and axial bearing assure high reliability and safety margins.

Modular design allows optimal adaptation to plant requirements.

Extensive operating experience on thousands of pumps for fossil-fuelledptants.

Startup from cold or standby condition.

Service-friendly design allows easy maintenance of bearings. Mechanical seal and balancing piston without dismantling motor.

Measuring equipment for determining axial loads(preventive measures of pump)

●      CHTZ

The construction and design features

a)       Type CHTZ boiler feed water pumps are horizontal spilt double casing arranged impeller in the same direction. The advantage is to short radial and axial dimensions. Decrease space transition flow passage and pump volume, increase the integral reliability and shorten the occupying space.

b)       The pump cartridge of type CHTZ pump can be interchanged with that of type CHTA pump without changing the outline dimensions ,pump barrel and rotor of the original type CHTA. The pumps have high versatility degree and applicability.

c)       The horizontal spilt inner casing of type CHTZ boiler feed pump is integrally connected. To compare with the pump cartridge fitted with ring section multi-stage diffuser with stage casing, eliminate drnamic and static errors caused by muti-position fiting clearance and largely increase the integral constructional rigidity of pump cartridge and the reliability of pump unit.

d)       To compare with ring section boiler feed pump, the pump cartridge of type CHTA boiler feed pump can be drawn out. After-open horizontal spilt inner casing, the rotiting and static parts of each stage can be overhauled without dismantling impellers(heit or sliding fit) one by one.Make the dismantlement and maintenance facilitated and greatly shorten the overhauling time to increase the utilization ratio of boiler.

e)       Adopting finite element method to carry out comprehensive analysis, calculation and design for horizontal split inner casing,Fully consider to meet the requirement of strength,rigidity and make the deformability of inner casing caused by uneven temperatures site minimum.

f)        Wet area of flow passage of feed water pump is less, it is facilitated to be polished and favorable to increasing the efficiency of pump.

g)       After dynamic balance of rotor is carried our, it is allowable for pump to not be dismantled again.This can ideally keep the original dynamic balance accuracy and it is favorable to the reliable operation of pump.

h)       Type GHTZ feed water pumps perform ZN57083 quality control code.

i)         The outline dimensions, driven method,mechanical seal system, supervision ,protection and performance parameter etc.are the same as type CHTA high pressure boiler feed water pump.