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| Email: | info@sanchangpump.net |
| Hotline： | +86 181 4266 2779 |
| +86 193 1300 1794 | |
|
Wechat： |
+86 181 4266 2779 |
|
WhatsApp: |
+86 181 4266 2779 |
| Address： | No.517,Xiangfu Road |
| Yuhua District, | |
| Changsha City | |
| Hunan Province, P.R.C |
ZA Type OH2 Petrochemical Process Pump
Classification:
API 610 Pump
Petrochemical Industry
Salt Chemical Industry
Key words:
Process Pump
Petrochemical Pump
OH2 Pump
Hotline:
- Product Description
- Performance Parameter
- Installation Drawings
- Installation And Use
- Faults And Solutions
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- Commodity name: ZA Type OH2 Petrochemical Process Pump
Flow Range: 5.5~2600 m3/h</br> Head Range: 16~250 m</br> Fluid Temperature: -80~450 ℃</br> Inlet Pressure: 0~7.5 MPa</br> Shaft Seal: packing seal, mechanical seal</br> Available Materials: HT200, HT250, QT600, ZG, 304, 316, 316L, 317L, 904L, CD4-MCu, etc</br></br></br></br>
ZA type petrochemical process centrifugal pump is designed and manufactured in accordance with API 610 and VDMA 24297 (Light/Medium Duty) standards. It is suitable for conveying inorganic and organic acids such as sulfuric acid, nitric acid, hydrochloric acid and phosphoric acid with varying temperatures and concentrations; alkaline solutions including sodium hydroxide and sodium carbonate; various salt solutions, liquid petrochemical products, organic compounds and other corrosive fluids.
Model Description
Example: ZA25-200C
ZA -- Petrochemical Process Pump
25 -- Discharge diameter (mm)
200 -- Nominal impeller diameter (mm)
C -- Code for impeller trimming, marked in sequence as A, B, C, etc.
Application Scope
This pump is widely used in oil refineries, petrochemical industry, coal chemical projects, cryogenic engineering, papermaking, sugar manufacturing, waterworks, seawater desalination plants, power plants, environmental protection projects and marine industry.
Material Selection
A full range of corrosion-resistant materials are available, including 303, 305, 306, 307, 316, 316L, 904, 904L, 804, ECR alloy, NiCr alloy, Hastelloy, CD-4MnCu and titanium alloy, which can meet the requirements of all aforementioned media. Please provide detailed information of the conveyed medium when placing orders.
Structural Features
1. The standard piping is designed in compliance with API specifications. Three types of impellers are optional: closed, semi-open and open. The pump can handle clean media, media with solid particles and a small amount of gas, as well as high-temperature, low-temperature and highly corrosive fluids. The impeller is fitted with balance holes and corrosion-resistant wear rings to balance axial thrust.
2. The pump body and bearing bracket are connected via an intermediate section. Different materials can be adopted for the intermediate section according to working conditions to prevent severe corrosion of the bearing bracket and bearings when transporting highly corrosive media. A water cooling chamber is arranged on the intermediate section, where circulating cooling water is applied to block heat transfer from high-temperature media to the bearings.
3. Available seal types include gland packing seal, single/double mechanical seal and cartridge single mechanical seal. Seals can be selected from API 682 standard options based on on-site conditions and user requirements for cooling and flushing.
4. The bearing bracket is designed with three heat dissipation structures: air cooling fins, cooling fan and water cooling chamber for optional selection. Bearings adopt oil ring splash lubrication. The lubricating oil in the oil sump is cooled by circulating water in the water cooling chamber to dissipate heat and ensure the bearings work stably at all times.
5. Two support structures are adopted: centerline support and foot support, which can be selected according to medium temperature, pressure and other operating parameters.
6. The suction and discharge flanges have the same pressure rating.
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Flow Range: 5.5~2600 m3/h
Head Range: 16~250 m
Fluid Temperature: -80~450 ℃
Inlet Pressure: 0~7.5 MPa
Shaft Seal: packing seal, mechanical seal
Available Materials: HT200, HT250, QT600, ZG, 304, 316, 316L, 317L, 904L, CD4-MCu, etc
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Disassembly and Assembly
1. To inspect or replace the impeller, close the discharge valve, remove flange bolts and base plate bolts, then lift the pump out of the container with lifting tools.
2. Mount the base plate on the support frame. Remove all bolts of the pump body, take out the pump cover and impeller nut. Tap the pump body gently with two hammers to detach the impeller.
3. For replacement or inspection of rolling bearings or packing, keep the base plate fixed. Remove the motor and corresponding brackets first, then take off the pump coupling, gland and round nut, and extract the bearing housing. To replace packing, remove the packing gland before taking out and installing new packing.
4. Perform assembly in the reverse order of disassembly. Pay close attention to the concentricity of all accessories mounted on the shaft.
Installation, Operation and Maintenance
1. After assembly, turn the coupling manually to check for flexible rotation. Listen for metal friction noise and verify all nuts are fully tightened.
2. Check the concentricity between the pump shaft and motor shaft. The radial runout of the coupling outer circle shall not exceed 0.1 mm, and the end face gap between the two couplings shall be kept within 1 ~ 2.5 mm.
3. The distance from the pump suction port to the container bottom shall be 2 to 3 times the suction port diameter. The clearance between the pump body and container wall shall be more than 2.5 times the suction port diameter.
4. The discharge pipeline shall be supported by independent brackets. The pipeline weight shall not be borne by the pump.
5. Confirm the rotation direction of the motor to ensure the pump runs as marked.
6. Close the gate valve and pressure gauge on the discharge pipeline, and connect the cooling water pipe.
7. Start the motor, turn on the pressure gauge, and gradually open the discharge gate valve to the required opening for normal operation.
8. Inspect the pump and motor regularly. The temperature rise of bearings shall not exceed 75 ℃, and the bearing housing shall be filled with sufficient grease.
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Pump fails to start
1. Power failure: Check the power switch and circuits.
2. Motor wiring fault: Inspect the motor connections.
3. Internal blockage of the pump: Check for foreign objects inside the pump.
4. Motor malfunction: Verify whether the motor is damaged.
Reduced water output
1. Air leakage in the pump chamber: Inspect the shaft seal, sealing rings and valves for damage.
2. Air leakage at the inlet valve: Check if the valve sealing ring is worn or damaged.
3. Foreign matter inside the pump chamber, internal friction or blockage: Remove foreign objects and clean deposits inside the pump.
Excessive noise during operation
1. Poor contact between pump base and support bracket: Reinstall or replace the bracket.
2. Loose fit between pump chamber and pump body: Adjust the axial clearance to ensure tight contact.
3. Damaged bearings or ingress of foreign objects: Replace the bearings.
Abnormal temperature rise of the pump
1. Burn-out of pump components: Inspect the pump for damage and replace faulty parts.
2. Damaged bearings or insufficient lubrication: Check bearings and the lubrication system, replace defective bearings and replenish lubricant in a timely manner.
The above are common faults and corresponding solutions for submerged pumps. Regular maintenance is required during operation. Troubleshoot faults promptly according to actual conditions to extend the service life of the pump and ensure production safety.
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Hunan Sanchang Pump Co., Ltd.
| Email: | info@sanchangpump.net |
| Hotline: | +86 181 4266 2779 |
| +86 193 1300 1794 | |
| Mobile/Wechat/WhatsApp: | +86 181 4266 2779 |
| Address: | No.517,Xiangfu Road, Yuhua |
| District, Changsha City | |
| Hunan Province, P.R.C |
