【正文】 types of pumps、 parameters of pumps and ponents and parts in accordance with Packing List before installation. We ensure that technical data and quality certificate of pump is plete. Pump can be installed after reading correlation technical data carefully, especially such as THE INSTRUCTIONS OF INSTALLATION AND APPLICATION FOR TYPE ZJ SLURRY PUMPS and mastering related technical 10 requirements. (2) Installation and capturing of pump The horizontal pump units should be equipped by making use of twice grouting. The central line of pumps is consistent with the central line of foundation. The deviation between centerheight of pump and design value is smaller than 177。 ④ Start the first stage pump and gradually open the outlet valve to 1 / i (i series stage). ⑤ when estimated slurry is filled with to 1 / i line, secondary pump start and gradually open the outlet valve to 2 / i。t up to mustard or you find problem in pump39。 ② Open shaft seal water and cooling water, adjust the pressure to the specified value。 . The outside cases made by HT200 or HT5007, connecting with bolts. The inside cases (volute case, front liner, back liner) made by highchrome alloy or rubber materials. Impeller front and back cover plates with back vanes to reduce leakage and increase operating life, impeller and shaft is firmly connected by laddershaped with disassembly ring, ” O” rubber ring is used between liner and volute casing and it is very convenient and reliable. There are three kinds of shaft seal type, expeller shaft seal, packing shaft seal and mechanical seal, see Expeller shaft seal is made of stuffing box, expeller, lantern ring, packing, packing gland and shaft sleeve, see 5 Packing shaft seal is made of stuffing box, spacer sleeves,lantern ring, packing, packing gland and shaft sleeve, see 。 Another type is ZJL, as singlestage singlesuction vertical axial inhalation centrifugal slurry pump. 3 1． ZJ Structural feature and type of ZJ slurry pumps （ 1） ZJ Pump Structure Feature ① Pump Head It is a horizontal cantilevered slurry doublecases pump. The pump head includes cases, impeller, and shaft seal. Doublecases pump centrally split vertical split direction. Discharge port can be positioned at 8 different position at an interval of 45176。s direction of rotation. When pump operate in opposite direction, some parts will be damaged. After pumps 19 are divorced from motors pletely, we can regulate motor direction of rotation. When they are in the same direction, we attach pumps to motors. We must not start motor blindly. (3) Adjustment of transmission When pumps are drove by elastic pin coupling, protective cover and pins should be set up carefully. When pumps are drove by belt, we adjust sliding track so as that every belt has the same pretightening force and install protective cover attentively. When pumps are drove by speed controllers, they are adjusted according to installation instructions. (4) All of fasteners must be reinforced again. (5) Put the tools and the lumbers aside to avoid accident, which was set on pump units 4. Test run of pumps Pump sets can be tested run after adjustment. If possible, slurry can be transported after test run with clear water. (1) Starting of pump ① Before starting of pump we must turn the impeller around in the stated direction in order that whether running is flexible. ② Switch on shaft seal water. Adjust pressure up to specified value. ③ Suction valves are opened pletely. ④ Open waterflooding valves to pour the water into pump. 20 ⑤ Open the outlet valves and adjust the opening degree of valve gate to quarter. ⑥ Start the pump units. We turn on piezometer on discharge pipeline after speed of rotation was stable. If pressure of discharge pipeline was stable, we can open discharge valves slowly up to required working conditions. Attention: When discharge valves are opened fully, starting pumps will make motor overloaded. Opening suction valves partly will bring about cavity. (2) Start series pump Series pump delivery line is longer, when calculation the pipeline head is consider the pipeline all full of slurry .Piping is not full of slurry pump when start it, if full open valve pipe, the head is low, the instantaneous flow rate of the pump favorite large flow, the motor overload, or cause vibration of the pump cavitation cause failure. Therefore, should press it is advisable to start the following steps: ① Close the outlet valve fully open inlet valve。 . 30 ② After packing, test run with supplying water, meantime, adjust gland bolts carefully to make the leakage be drop not line. Packing is very important to be pay attention to, it not only related state of seal, but also affect performances of pump. ? In order to make pumps operate efficiently we must adjust the interval between impeller and front liner so as that it is between mm. The interval has been adjusted before delivery. You can stop pump and adjust it if you find it isn39。 ⑥ The rest so on, until the grout is full of the whole line running normal. 21 (3) Notes of pump After operation of pumps normally, we should examine the following Examine whether the capacity and head of pump stable and fit for requirement of work condition. ② Examine whether the electric current of motor is stable. ③ Examine sound、 noise and vibration in pump units is normal or not. ④ The temperature rise of bearings is under 35℃ , but the highest temperature of bearings is lower than 75℃ . ⑤ For packing seal, should open the shaft sealing water and check whether shaft sealing water quantity and water pressure are suitable, adjust the bolts on packing gland so as to adjust packing and shaft sealing water, it is better to leak out drop by drop, if