Overview
Twin-screw multiphase pumps are positive displacement pumps featuring two intermeshing screws that rotate to move complex fluid mixtures. They excel in applications where conventional pumps fail due to phase separation or cavitation risks. Originally developed for offshore oil production, these pumps now serve diverse industries, including chemical manufacturing and food processing. Their ability to handle varying gas-to-liquid ratios (up to 95% GVF) makes them indispensable for unconventional resource extraction.
Structure and Working Principle
The pump consists of two parallel rotors (male and female screws) housed in a precisely machined casing. As screws rotate, fluid is trapped in cavities between the screws and casing, progressing axially from suction to discharge ports. Timing gears synchronize screw movement to prevent contact, reducing wear. Advanced designs incorporate profile modifications (e.g., asymmetric screw geometry) to optimize efficiency for specific fluid properties. Sealing systems (mechanical seals or lip seals) prevent leakage while accommodating axial thermal expansion.
Key Features
1. **Multiphase Handling**: Maintains steady flow despite fluctuating gas/liquid ratios, eliminating need for upstream separators. 2. **Low Pulsation**: Screw engagement ensures smooth discharge, minimizing pipeline vibrations. 3. **Energy Efficiency**: Typically achieves 60–75% volumetric efficiency even with high GVF flows. Modern variants include smart monitoring systems with sensors for pressure, temperature, and vibration, enabling predictive maintenance. Coatings like tungsten carbide extend screw life in abrasive services.
Application Areas
**Oil & Gas**: Transporting unprocessed wellstreams in marginal fields or subsea applications. Reduces footprint by replacing separator-pump combinations. **Chemicals**: Transferring polymer melts or reactive mixtures where shear sensitivity matters. Also used in LNG processing for boil-off gas recompression. **Wastewater**: Handling sludge with high solids content or biogas in anaerobic digesters. Municipal plants use them for grit removal systems.
Maintenance and Precautions
Routine checks should focus on gearbox oil quality, seal integrity, and screw clearance (wear increases internal recirculation). Annual overhaul is recommended for critical services. Avoid prolonged operation at low flow rates, which can cause overheating. Start-up procedures must ensure adequate fluid lubrication—dry running for even minutes can score screw surfaces. For corrosive fluids, specify duplex steel screws and ceramic-coated liners.
B2B Procurement Guide
**Specification Checklist**: - Flow rate range (min/max) - Maximum allowable solids size - NPSH (Net Positive Suction Head) requirements **Supplier Evaluation**: Prioritize manufacturers with field-proven designs in your industry. Request case studies for similar applications. Modular designs simplify future capacity upgrades. **Cost Factors**: Material grade (e.g., super duplex vs. standard stainless) affects 40–60% of total cost. Lead times for custom-engineered units often exceed 12 weeks.
Related Manufacturers
- 主营：[]
- 主营：[]
- 主营：齿轮泵、螺杆泵、金属转子泵、橡胶转子泵、3泵头计量泵、焚烧炉输送泵、金属凸轮转子泵、夹套保温、防爆电机
- 主营：[]
- 主营：[]
- 主营：吸泥机、格栅配件、造流增氧机、管道离心泵、潜水排污泵、离心曝气机、潜水曝气机、潜水搅拌机、板框压滤机、污水处理设备、固液分离设备、水下管式增氧机、景观喷泉曝气机、光伏气泡发生器
- 主营：螺杆泵
- 主营：齿轮泵、食品泵、圆弧泵、罗茨泵、油渣泵、油泵2cy、手摇泵、三螺杆、真空泵、离心泵、热油泵、保温泵、离心油泵、ycb磁力泵、双螺杆泵、单螺杆泵、齿轮油泵、润滑油泵、恒盛泵业、高粘度泵、污水螺杆泵、船用螺杆泵、磁力驱动、自吸离心、高温热油
- 主营：小口径、气动笼、温控阀、冷凝泵、循环泵、冷却泵、旋片泵、渣浆泵、泵特点、陶瓷泵、屏蔽泵、减泥泵、扫油泵、海水泵、磁力泵、真空泵、长袖泵、排污泵、塑料泵、制氧机、刀闸阀、切碎机、增压缸、鼓风机、搅拌机
- 主营：进口乳化机、进口气浮机、进口鼓风机、进口沉水泵、进口循环泵、进口渣浆泵、进口屏蔽泵、进口节能泵、进口溶液泵、进口排污泵、进口塑料泵、进口磁力泵、进口混流泵、进口自吸泵、进口化工泵、进口离心泵、进口搅拌机、进口潜水推流器、进口曝气器、进口曝气机、进口空压机、进口潜水搅拌机、进口罗茨风机、进口磁悬浮风机
- 主营：螺杆泵、齿轮泵、软管泵、燃油泵、圆弧泵、罗茨泵、隔膜泵、离心泵、保温泵、离心油泵、导热油泵、鸿海泵业、润滑油泵、不锈钢泵、防爆污水泵、柴油防爆泵、乳化沥青泵、自吸泵、沥青泵、滑片泵、防爆泵、凸轮转子泵、高粘度泵
- 主营：导热油、内啮合、乳化剂、齿轮泵、焦油泵、输油泵、树脂泵、罗茨泵、增压泵、重油泵、热油泵、双圆弧、渣油泵、圆弧泵、转子泵、螺杆泵、燃油泵、离心泵、保温泵、kcb齿轮、外润滑、燃烧器、润滑油、沥青机、罗茨油
- 主营：大流量齿轮油泵、油泵、螺旋泵
- 主营：鼓风机、球阀、变送器、隔膜泵、渣浆泵、螺杆泵、磁力泵、屏蔽泵、负压风机、罗茨风机、液位计、针型阀、蒸汽压缩机、进口阀门、磁悬浮变频风机、闸阀、蝶阀、止回阀
- 主营：螺杆泵、单螺杆泵、双螺杆泵、三螺杆泵、螺杆泵撬装系统、3G三螺杆泵、双螺杆泵撬装系统、水电泵 电厂用液下泵、3QGB沥青保温泵、立式三螺杆泵、SN型三螺杆泵、3G系列三螺杆泵、SM型卧式三螺杆泵
- 主营：螺杆泵、燃油输送泵
- 主营：三螺杆泵、双螺杆泵、污泥单螺杆泵、螺杆油泵、齿轮油泵、沥青泵、润滑油输送泵
- 主营：潜水排污泵、离心泵、应急抽水泵、柴油机泵组、消防泵、浮筒式潜水泵、水泵控制柜、给水排水泵、增压泵、自吸泵、排污泵、湿式泵、冲压泵、循环水泵、预制泵站、隔膜泵、热水管道泵、磁力驱动泵、建筑给水泵、消防喷淋泵、不锈钢多级泵、应急抗旱水泵、污水提升工程泵、二次供水设备、污水提升设备
- 主营：阀门、流量计、电磁阀、水泵、循环泵、隔膜泵、增压泵、螺杆泵、潜水泵、排泥泵、真空泵、自吸泵、截止阀、球阀、排气阀、调节阀、污水处理设备、变送器、压力表、空气悬浮风机、吊环吊点、安全阀、传感器、磁悬浮风机、罗茨风机
- 主营：进口撬装式螺杆泵、电磁阀