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Screw Pump–Roots Screw Vacuum Unit Selection Parameter Table
Shandong Boco Vacuum Technology Co., Ltd. Phone: 0533-4138333 | Selection Parameter Table | Client Organization: | ||||||||||
Required quantity |
| Installation location | □Indoor □Outdoor | |||||||||
Extracted medium | Type of medium |
| Use of the working solution | □ Closed (circulating) | ||||||||
Component |
| □ Open-type (non-circulating) | ||||||||||
Average molecular weight |
| Close | Points | Type | □Vertical □Horizontal | |||||||
Density kg/m³ |
| Material | □CS □SS | |||||||||
Air intake | Inlet temperature ℃ |
| Overflow | □ Manual □ Automatic | ||||||||
Working pressure mbar |
| Replenishing and draining fluid | □ Manual □ Automatic | |||||||||
Ultimate pressure mbar |
| Heat exchanger | Type | □Shell-and-tube □Plate-type | ||||||||
Volumetric flow rate Nm³/h |
| Material | □CS □SS | |||||||||
Mass flow rate kg/m³ |
| Heat transfer area | m2 | |||||||||
Process pipeline | DN | Liquid | Type of working fluid | |||||||||
Rank | Discharge pressure (MPa) | Working fluid temperature | (°C) | |||||||||
Process pipeline | DN | Working fluid fouling factor |
| |||||||||
Liquid-ring pump requirements | material | Impeller |
| Working fluid viscosity |
| |||||||
Disc |
| Working fluid density | (kg/m³) | |||||||||
Pump body |
| Cold | Types of Cooling Water | |||||||||
Pump shaft |
| Cooling water inlet temperature | (°C) | |||||||||
Pump cover |
| Cooling water inlet pressure | (MPa) | |||||||||
Bushing |
| Cooling water return temperature | (°C) | |||||||||
Communication conduit |
| Cooling water return pressure | (MPa) | |||||||||
Other items |
| Return | Is it necessary? | □ Required □ Not required | ||||||||
Sealed | Shaft-end sealing type | □ Single-face mechanical seal | Type | ■Shell-and-tube type | ||||||||
| □ Double‑ended mechanical seal | Material | □CS □SS | |||||||||
| □ Packing Seal | Heat transfer area | m2 | |||||||||
Mechanical seal flushing method | □ Internal flushing □ External flushing | Pressure-bearing requirements | (MPa) | |||||||||
Transmission method | □ Belt □ Direct drive | Electricity | Voltage/Frequency | |||||||||
Roots pump material | Anti-corrosion treatment | □ Required □ Not required | Explosion-proof rating | |||||||||
Corrosion prevention method | □ Ni-P plating | Protection rating | ||||||||||
| □Teflon | Insulation class | |||||||||||
| □ Hastelloy alloy penetration | Electricity | DCS System Monitoring | □ Required □ Not required | |||||||||
Shaft-end sealing type | □ Five-point skeleton oil seal | Electrical Component Requirements | □ Domestic □ Imported | |||||||||
| □ Piston ring + oil seal | Control cabinet | □Explosion-proof □Non-explosion-proof | ||||||||||
Transmission method | ■Direct Connection | On-site control station | □ Required □ Not required | |||||||||
Other requirements | ||||||||||||
External Interface Flange Standard |
| Instrumentation/Control Components | □ Made in China □ Imported | |||||||||
Motor manufacturer | □ Designated ( ) □ Not designated | Electric (or pneumatic) valve | □ Designated ( ) □ Not designated | |||||||||
| Note: 1. If no specifications are provided, it will be treated as having no special requirements and manufactured according to standard procedures. 2. When determining the suction capacity of a liquid-ring vacuum pump, it is important to consider the effect of the working fluid (water) temperature on the pump’s pumping speed. | ||||||||||||
Liquid Ring Pump–Roots Liquid Ring Vacuum Unit Selection Parameter Table
Shandong Boco Vacuum Technology Co., Ltd. Phone: 0533-4138333 | Selection Parameter Table | Client Organization: | ||||||||||
Required quantity |
| Installation location | □Indoor □Outdoor | |||||||||
Extracted medium | Type of medium |
| Use of the working solution | □ Closed (circulating) | ||||||||
Component |
| □ Open-type (non-circulating) | ||||||||||
Average molecular weight |
| Close | Points | Type | □Vertical □Horizontal | |||||||
Density kg/m³ |
| Material | □CS □SS | |||||||||
Air intake | Inlet temperature ℃ |
| Overflow | □ Manual □ Automatic | ||||||||
Working pressure mbar |
| Replenishing and draining fluid | □ Manual □ Automatic | |||||||||
Ultimate pressure mbar |
| Heat exchanger | Type | □Shell-and-tube □Plate-type | ||||||||
Volumetric flow rate Nm³/h |
| Material | □CS □SS | |||||||||
Mass flow rate kg/m³ |
| Heat transfer area | m2 | |||||||||
Process pipeline | DN | Liquid-ring pump operator | Type of working fluid | |||||||||
Rank | Discharge pressure (MPa) | Working fluid temperature | (°C) | |||||||||
Process pipeline | DN | Working fluid fouling factor |
| |||||||||
Liquid-ring pump requirements | Material | Impeller |
| Working fluid viscosity |
| |||||||
Disc |
| Working fluid density | (kg/m³) | |||||||||
Pump body |
| Cooling water | Types of Cooling Water | |||||||||
Pump shaft |
| Cooling water inlet temperature | (°C) | |||||||||
Pump cover |
| Cooling water inlet pressure | (MPa) | |||||||||
Bushing |
| Cooling water return temperature | (°C) | |||||||||
Communication conduit |
| Cooling water return pressure | (MPa) | |||||||||
Other items |
| Heat exchanger for recovery | Is it necessary? | □ Required □ Not required | ||||||||
Sealed | Shaft-end sealing type | □ Single-face mechanical seal | Type | ■Shell-and-tube type | ||||||||
| □ Double‑ended mechanical seal | Material | □CS □SS | |||||||||
| □ Packing Seal | Heat transfer area | m2 | |||||||||
Mechanical seal flushing method | □ Internal flushing □ External flushing | Pressure-bearing requirements | (MPa) | |||||||||
Transmission method | □ Belt □ Direct drive | Motor Requirements | Voltage/Frequency | |||||||||
Roots pump material | Anti-corrosion treatment | □ Required □ Not required | Explosion-proof rating | |||||||||
Corrosion prevention method | □ Ni-P plating | Protection rating | ||||||||||
| □Teflon | Insulation class | |||||||||||
| □ Hastelloy alloy penetration | Electricity | DCS System Monitoring | □ Required □ Not required | |||||||||
Shaft-end sealing type | □ Five-point skeleton oil seal | Electrical Component Requirements | □ Domestic □ Imported | |||||||||
| □ Piston ring + oil seal | Control cabinet | □Explosion-proof □Non-explosion-proof | ||||||||||
Transmission method | ■Direct Connection | On-site control station | □ Required □ Not required | |||||||||
Other requirements | ||||||||||||
External Interface Flange Standard |
| Instrumentation/Control Components | □ Made in China □ Imported | |||||||||
Motor manufacturer | □ Designated ( ) □ Not designated | Electric (or pneumatic) valve | □ Designated ( ) □ Not designated | |||||||||
| Note: 1. If no specific requirements are provided, the item will be manufactured as a standard product. 2. When determining the suction capacity of a liquid-ring vacuum pump, it is important to consider the effect of the working fluid (water) temperature on the pump’s pumping speed. | ||||||||||||
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