Finish machining

Zigong Pump owns 8 standard industrial workshops,including casting workshop,finish machining workshop,welding workshop and assembly workshop.The whole factory covers which 130,000 m2(32 acres). The design annual output capacity of new factory is 17800 pcs; The maximum capacity of bridge crane is 50 tons; There are 424 sets of large and key equipment in the 8 workshops,which enable Zigong Pump to manufacture various kinds of pumps.

Key machining facilities:

■ Finish machining: 5-meter CNC vertical lathe, 4-meter double-column vertical lathe, CNC boring and milling center,

2.5/1.6/1.25-meter vertical lathe, 8-meter double planer and milling lathe, horizontal CNC lathe,80 radial drilling

lathe...

■ Plate welding: CNC cutting machine, universal reeling machine, welding rod drying box, argon arc welding machine...

■ Assembly: Bearing heater, shaft sleeve/couplings heater, retractable painting house...

Foundry

■ Foundry:3t/AOD(argon oxygen decarburization)furnace, 0.75t~2.5t medium-frequencyinduction furnace, 10t/h resin-bonded sand production line of cast steel, 20t/hresin-bonded sand production line of cast iron, 4×3×2.4 m

natural gasheat treatment furnace, bench type high temperature resistance furnace, 5tdouble hook fine/rough polish cleaning machine...

■ AOD(argon oxygendecarburization) process and intelligent control system: AOD is an advancedprocess of producing extralow carbon stainless steel and purified high qualityalloy steel, with advantages of high efficiency and accurate compositioncontrol. The produced products have excellent performance in mechanics andworkmanship. The AOD furnace is able to smelt cast steels like 304,316L andother different materials with high carbon ferrochromium alloy and variousfoundry returns.The smelting loss is less,meanwhile,the electricity consumptioncan be reduced by 150~200kW/h compared to normal electric furnace.

■ Double hookpolish cleaning system: Shot blasting technology is one of the advancedprocesses of cleaning,hardening,polishing and deburring of the surface ofvarious machines. The system mainly consists of impeller head,anti-abrasionrubber band, lift, separator,feed delivery, dust extracter, electric devices.Non-pit type,less cost and anti-rusting; Double hook design, one hook canwork  while another one is loading orunloading outside,which brings high efficiency.

■ Self-hardeningresin-bonded sand line: There are two production lines of 10t/h resin-bondedsand of cast steel

and 20t/h resin-bonded sand of cast iron, both lines adoptenvironment friendly sand treatment and wasted sand recycle

technology. Thededusting efficiency as high as 99.5%, and the density of discharged dustslower than 60mg/Nm3. Self-hardenning resin-bonded sands are clean and new typeof raw and auxiliary material, obviously,they are advanced compared

to thetraditional clay sands. The liquidity and collapsibility of self-hardenningresin-bonded sands are excellent,

sand mould and sand core don’t have to enterdrying stove. The wasted sands can be totally recycled after the

dryreclamation, which greatly reduces the energy consumption and improves thesanitary condition and lobor strength in

the workshop. The sand mould and coreintensity is high after hardened,which improves the dimensional precision of the castings, reduces the finish machining margin. Scrappage is lower comparedto the traditional technology.