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Stainless Steel Centrifugal Pump Model IH

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Description

Safety Notice

To avoid accident or damage, please be sure to read the Safety Notice carefully before use of the pump. Be sure to follow the safety instructions in this section. The Operating Instructions is very important and may prevent the pump operator or other people from injury or mitigate property damage.

1.Safety Warnings

1)Hazard of magnetic field: The pump driven by magnetic force will generate a very powerful magnetic field that will cause adverse impact to those who wear electronic medical devices (e.g. electronic pacemaker).

2)Be sure to cut off the power supply before repair or other work. When there is someone repairing the pump, take protective measures to prevent other operators from switching on the power supply by mistake. In noisy or dark environment, place a clear sign beside the power switch to warn others. Switching on the power supply by mistake during maintenance may cause severe accident or even human death. Every person shall take special care.

3)Please wear safety goggles, protective gloves, protective clothes and other necessary protective equipment when replacing the pipe system or removing or assembling the pump.

4)When lifting the pump, use chain or belt to pass through the lug or motor to keep the pump and motor on level position. Do not stand beneath the lifted pump.

5)To avoid leakage, be sure to perform routine inspection and maintenance of the pump when it is used for trans porting the following dangerous liquids. In the event of leakage, such dangerous liquids (or volatile gas) will cause human death, explosion or fire.

a)Inflammable or explosive liquids;

b)Corrosive or poisonous liquids;

c)Liquids harmful to human body.

2.Safety Cautions

1) Avoid idle run: Idle run may heat impeller axle and destroy the mechanical seal due to dry friction, thus resulting in damage to the pump. (It is also deemed idle run if the pump works with the inlet and outlet valve closed).

2) Avoid damage due to static charge: Static charges will be generated if the pump is uses for transporting the liquids of low conductivity, e.g. ultra-pure water or fluorine-contained inert fluids. This will cause electric discharge and damage to the pump. Measures shall be taken to prevent the generation of static charges or other measures shall be taken to lead the static charges.

3) The pump maintenance personnel shall have professional knowledge and operating experiences.

4) Centrifugal pump made of special materials shall be used for designated working conditions only; otherwise there is no way to ensure the normal performance and service life of the pump, or it may even cause accident.

5) Requirements for site ventilation: Safety measures must be taken if the pump is used for transporting the volatile poisonous gas. For example, ventilation equipment may be installed to avoid liquid leakage in case of emergency.

6) Avoid liquid leakage: To prevent the liquid from flowing directly into the ground, protective measures shall be taken against the leakage caused by emergency accident or pipe damage.

7) Select the electromagnetic switch according to the motor specification, e.g. rated voltage and rated power.

8) If the pump is installed outdoor, protective measures must be taken for the electric circuits, thus to prevent the water from flowing into the switch.

9) The electromagnetic switch and buttons shall be installed safely and away from the pump.

Introduction

1.Use and Features

This pump is widely used in such industries as petrochemicals, acid / alkali making, non-ferrous smelting, acid wash in automobile manufacturing, rare earth separation, pesticides, dyes, pharmaceuticals, papermaking, electro-plating and radio. It is suitable for transporting clear liquids or corrosive medium containing tiny particles (solid content≤10%).

Model IH Stainless Steel Centrifugal Pump is designed in accordance with the international standards. Its body, impeller and cover are modular built and precision casted based on CFD calculation of the fluid hydraulic components. It features in wide flow passage, high efficiency, superior NPSH performance, low radial force, accurate size, polish passage and good interchangeability. The sealing is available with internal single-end mechanical seal, internal dual-end mechanical seal and external mechanical seal for option. The sealing material is selected according to the liquid to be transported. The complete pump is designed in back-pull structure, with any need for pipe removal; so the repair is very easy. It is horizontally installed, featuring in low vibration, low noise and stable operation.

2.Packaging and Inspection

Check the following after unpacking:

1)If the pump and its accessories (including the other documents required by the user) are complete as on the Packing List.

2)If the data on the nameplate of the pump and motor are according to the order requirements.

3)If the pump is damaged during transport and if the bolts are loose.

3.Model Definition

IH 50-32-160 A

IH: Series code for international standard chemical pump 50: Pump inlet diameter 50mm

32: Pump outlet diameter 32mm 160: Impeller nominal diameter 160mm

A: Impeller cutting code

4.Model and Parameters

Installed with 2-step motor 2900r/min

Installed with 4-step motor 1450r/min

Notes:

1.If the specific gravity of the medium exceeds 1.2g/cm3, the user is suggested to add the motor power as appropriate.

2.In case of any change to the liquid to be transported, it is needed to replace with special components according to the liquid properties.

3.When the flow at working condition is too low, backflow pipe shall be connected at the outlet. For details, please consult our technology center.

5.Scope of Application

1) Pressure limit: The pressure limit is 1.0MPa. Take care that the output pressure of the pump shall not exceed the pressure limit.

2) Range of working temperature: -20~100℃; Variance of ambient temperature: 0~40℃; Variance of ambient humidity: 35~85%RH

3) If the working temperature is within 100℃~150℃, the flow passage components shall be made of fluorine plastic resistant to high temperature.

4) The pump may be used to transport the medium that contains tiny particles and crystals (solid content≤10%). Never use the pump for transporting the medium that may generate plentiful bubbles.

5) Impact of liquid viscosity to the pump performance: The pump performance varies with the liquid viscosity. Table 2 (n=1450 r/min) – To be continued on page 5

6.Internal Structure

7. Mounting Size

Installed with 2-step motor 2900r/m

Installed with 4-step motor 1450r/m

8.Flange Size

Installation:

1.Key Points of Installation

1) The pump shall be installed and fixed on solid foundation free from the impact of mechanical vibrations.

2) The foundation shall weigh three (3) times the equipment weight or higher, and be larger than the seat.

3) For easy repair and maintenance, adequate space shall be left around the pump.

4) Place the pump unit on the foundation. Gaskets shall be paved between the seat and foundation.

2.Pipe

1)The pipes into and out of the pump shall be supported. Do not use the pump as the support. The pipe diameter shall be compatible to the pump inlet / outlet size.

2)Ensure that the mounting height of the pump conforms to the NPSH. The pipe loss and medium temperature shall be also considered. To avoid NPSH within pump body, be sure to follow the formula

below:

NPSHa ≥ NPSHr + 0.5, in which:

NPSHa: Effective (equipment) NPSH (m) NPSHr: Necessary (pump) NPSH (m)

Pa: Pressure applied onto the surface of transported medium (MPa)

Pv: Steam pressure of the medium (MPm)

g: Gravitational acceleration (m/s)

ρ: Medium density (kg/m3)

hs: Height of suction (m)

hf: Resistance of suction pipe (m)

3)The pipe bend shall be as smooth as possible. Minimize the bends and avoid bend at the position close to the pump inlet.

4)The liquid drop shall be considered. The inhale pipe shall be positioned at an adequate immersed depth. To prevent the foreign particles from entering the pump, filter shall be installed at the inlet. The filtration area shall be 3-4 times larger than the section area of the pipe. The filter shall be cleaned regularly.

5)When the pump is used for upward suction, bottom valve must be installed on the inlet pipe of the pump. When the pump is used for back flow, valve must be installed on both the inlet and outlet of the pump. The valve mounted in the outlet pipe may be used for adjusting the flow to ensure that the pump works at the specified flow. This may avoid the pump failure due to motor overload. (Never use the inlet valve for adjusting the flow).

6)For easy repair, pipe compensator shall be installed at the inlet and outlet of the pump as it might be.

7)The pipe must be correctly connected. The sealing gasket between the flanges shall be smooth and not be mal-positioned. If there is leakage on the seal, the pump cannot work normally or the pump might be even damaged.

Operation and Maintenance

1.Cautions before Use

1)Always avoid idle run of the centrifugal pump. The minimum flow of the pump during operation shall be 35% of the design value.

2)If cavitations occur when the pump is running, be sure to stop the pump within one (1) minute.

3)The variance of medium temperature shall be controlled within 40℃. If the temperature rise / drop are too high, it might cause damage to the pump components.

4)If there is sudden power failure when the pump is running, be sure to cut off the power supply immediately and close the outlet valve.

5)The pump noise is ≤85dB. If there is vibration or noise, please stop the pump and check it. Do not restart the pump until the trouble is eliminated.

6)If pump inlet diameter ＜150mm: Lubricate the bearing with grease and do not add oil into the bearing box additionally. If pump inlet diameter ≥150mm: Lubricate the bearing with oil and please add oil into the bearing box. Notes: For centrifugal pump IH100-65-250 and IH125-100-200 (250), the bearing shall be lubricated with oil, and it is therefore needed to add oil into the bearing box.

2.Start and Operation

1)Start

Calibrate the coupler before starting the pump.

(1)Before calibrating the coupler, control the rotating direction of the motor at the disengagement position according to the arrow on the pump.

(2)The flexible coupler requires careful calibration of its axis. Adjusting gasket may be used for adjustment. Any negligence during calibration may cause damage to the coupler, pump and drive bearing.

(3)To calibrate the coupler, a precision ruler may be placed against the outer edge of the coupler to observe its parallelism to the axis from several points. A feeler gauge may be used on several positions to control the distance between two semi-couplers.

(4)For the pump with oil-lubricated bearing, lubricating oil shall be firstly filled into the bearing box until it reaches the center position of the oil gauge. To keep the oil clean and good lubrication, the oil shall be replaced periodically. Generally, the oil shall be totally replaced every 1500 hours of operation. N46 machinery oil is preferred.

(5)Under back-flow working condition, open the inlet valve to supply the liquid. Under upward-suction working condition, the pump must be filled up with liquid firstly.

2) Operation

(1)To avoid damage to the impeller and other components, never control the flow by closing or adjusting the inlet valve.

(2)Test run the pump for 5 – 10 minutes. If there is no abnormality, put the pump into normal operation.

(3)Regularly check the pump and motor for temperature rise. The temperature rise of bearing shall be not higher than 40℃ and the limit temperature shall not be higher than 90℃. For insulated motor, the maximum temperature rise shall be 90℃ when the ambient temperature is 40℃, and the tolerable limit temperature is 130℃.

(4)If the pump head is lower than the rated head, be sure to close the outlet valve smaller to make the flow reach the rated value. If the outlet valve is fully open, the flow will be higher than the rated value.

(5)If finding abnormal sound or other problems during operation, please stop the pump immediately and check it. Do not restart the pump until the problems have been eliminated.

3) Stop

(1)Firstly close the outlet valve. Then, cut off the power supply of the motor.

(2)Close the inlet valve.

(3)Keep the pump outer surface and environment clean.

(4)After the pump is stopped, if the ambient temperature is lower than the freezing temperature of the liquid, it is needed to discharge the liquid thoroughly from the pump, thus to avoid freezing.

(5)If the pump is long out of use, the corrosive liquid inside the pump shall be thoroughly discharged. Besides, the pump chamber shall be flushed clean with clear water. Take special care to flush the sealing components and block the pump inlet and outlet properly. Keep the pump in good condition.

3.Repair and Maintenance

1)Check the pump and motor regularly. Replace the easily-damageable components.

2)If the pump is stopped and placed long out of service, the flow passage inside the pump shall be flushed and the power supply shall be disconnected.

3)Always avoid idle run. If the pump is installed outdoor, rainproof measures shall be taken to prevent the motor from burn due to moisture.

4.Removal and Assembly

1)Close the inlet and outlet valve. Loosen the anchor bolts fixing the motor. Then, separate the motor and pump cover (i.e. motor coupler and pump coupler).

2)Remove the protective cover. Loosen the bolts fixing the support to body and the bolts fixing the suspension support. Then, separate the impeller, pump cover, support, bearing box and mechanical seal from the pump body.

Internal single-end:

①Loosen the nuts fixing the impeller and remove the lock nut to separate the impeller from the shaft. Remove the seal and anti-rotation pin.

②Directly remove the pump cover assembly with mechanical seal. Loosen the bolts fixing the mechanical seal gland; then remove the static ring of mechanical seal.

③Remove the bushing. Loosen the 2 screws tightening the dynamic ring of mechanical seal; then remove the dynamic ring of mechanical seal from the bushing.

④To replace the pump body, it is needed to remove the bolts fixing the inlet and outlet pipe, and the anchor bolts fixing the pump body.

Internal dual-end:

①Loosen the nuts fixing the impeller and remove the lock nut to separate the impeller from the shaft. Remove the seal and anti-rotation pin.

②Directly remove the pump cover assembly with mechanical seal. Loosen the bolts fixing the mechanical seal gland; then remove the static ring of mechanical seal.

③Remove the bushing and remove the front and rear dynamic ring of the mechanical seal. Loosen the 2 screws tightening the dynamic ring of mechanical seal; then remove the dynamic ring of mechanical seal from the bushing. Place the seal chamber of pump cover on

level and push out the front static ring.

④To replace the pump body, it is needed to remove the bolts fixing the inlet and outlet pipe, and the anchor bolts fixing the pump body.

External Mounting:

①Loosen the nuts fixing the impeller and remove the lock nut to separate the impeller from the shaft. Remove the seal and anti-rotation pin.

②Directly remove the pump cover assembly with mechanical seal. Loosen the bolts fixing the mechanical seal gland; then remove the static ring of mechanical seal.

③Remove the bushing. Loosen the 3 lock screws and remove the thrust ring. Loosen the 2 screws tightening the dynamic ring of mechanical seal; then remove the dynamic ring of mechanical seal from the bushing.

④To replace the pump body, it is needed to remove the bolts fixing the inlet and outlet pipe, and the anchor bolts fixing the pump body.

Service Commitment

1)Long-term supply is ensured for the easily-damageable parts and other components.

2)New model of corrosion-resistant pump and explosion-proof motor may be designed according to the user requirements.

3)We provide technical supports and life-long services for our products.

4)We provide door-to-door commissioning and repair free of charge (The easily-damageable parts are charged per the ex-works price).

5. Troubleshooting

Fault	Cause	Solution
No liquid pumped	1. The suction pipe leaks air. 2. The liquid filled into the pump is insufficient. 3. The suction pipe is blocked by foreign substances. 4. The pump rotates in wrong direction. 5. The self-priming height is too high.	1. Check the suction pipe. 2. Refill liquid. 3. Clear off the foreign substances. 4. Adjust the rotating direction of the pump. 5. Reduce the self-priming height.
The flow is low	1. Impeller is damaged. 2. The rotating speed is low. 3. The inhale pipe is blocked by foreign substances.	1. Replace the impeller. 2. Check the motor and electric circuit. 3. Clear off the foreign substances.
The power is too high	1. The specific gravity of the medium is too high. 2. Mechanical friction exists.	1. Replace with the motor or pump that has a higher power. 2. Check the position of friction and make repair.
Pump head is low	1. There is air in the medium transported. 2. Impeller is damaged. 3. The rotating speed is low. 4. The viscosity of transported medium is too high.	1. Refill liquids or exhaust the air. 2. Replace the impeller. 3. Check the motor and electric circuit. 4. Reduce the viscosity or add the filling pressure.
The pump has vibration	1. The suction lift is too high, thus generating cavitations. 2. Mechanical friction exists.	1. Reduce the mounting height or replace with self-priming pump. 2. Check the position of friction and make repair.
The pump cannot perform self priming.	1. The suction pipe leaks air. 2. The outlet pipe is too short. 3. The outlet valve is closed. 4. The pump bolt becomes loose during transport, and the mechanical seal leaks air.	1. Check the suction pipe. 2. Add the length of outlet pipe. 3. Open the outlet valve. 4. Tighten the loose bolts.