- High efficiency
- Perfect pump configuration
- Low dead height of molten salt in the tank
- No external consumption
- Long lifetime and reliability
- Extensive references and wide experience
VEY and VNY molten salt pump for concentrated solar power
State-of-the-art molten salt pump for concentrated solar power
The VEY and VNY are vertical mixed-flow molten salt pumps with high capacity and medium to high head. Its design includes hydraulics from proven ranges. These pumps have been engineered to balance high efficiency, low submergence, net positive suction head required (NPSHR) considerations, long lifetime and reliability as required for concentrated solar power.
The VEY and VNY molten salt pumps are used as:
- Cold and hot molten salt circulation pumps in parabolic trough concentrated solar power plants
- High-pressure cold molten salt feed pump in central tower concentrated solar power plants
- Hot molten salt circulation pump in central tower concentrated solar power plants
- Cold molten salt attemperation pump in central tower concentrated solar power plants
- Cold molten salt melting and drainage pumps in parabolic trough and central tower concentrated solar power plants
Features and benefits
1. Engineered suction design for optimized submergence
2. First-stage impeller:
Inducer or high suction specific speed (Nss) impeller for reduced NPSHR
3. Engineered bearing bushings
Better shaft alignment and adaptation to the thermal expansion
4. Main shaft sealing by throttle bushing
Permanent leak-off recirculation to the molten salt tank
5. Auxiliary shaft sealing deflector
Prevents leakage of molten salt to the atmosphere
6. Shaft fans/radiators and efficient thermal barrier
- Reduces temperature, protects and increases lifetime of the pump bearings
- Heat barrier between hot/cold sections
7. Muff coupling
To ease dismantling
8. Special design to allow thermal expansions
- Extended wear ring zone
- Clearances calculated considering all the relative expansions
Operating data
| 50 Hz | 60 Hz | |
| Pump bowls | Up to 914 mm | Up to 36 in |
| Capacities | Up to 4,000 m3/h | Up to 17,600 US gpm |
| Heads | up to 380 m | up to 1,250 ft |
| Pressures | up to 100 bar | up to 1,450 psi |
| Temperatures | up to 600°C | up to 1,100°F |
Performance range
Performance range 50 Hz
Performance range 60 Hz
Materials
| Pump part | Material |
| Bowl | HT carbon steel, chrome steel, HT stainless steel |
| Impellers | HT carbon steel, chrome steel, HT stainless steel |
| Shaft | HT chrome steel, HT stainless steel |
| Column and discharge head | HT carbon steel, HT stainless steel |
Optional designs
VEY molten salt pump bowls and impellers
VEY molten salt pump discharge head and thrust bearing
Design Standards
- Suction inducer for very low NPSHR
- All the impellers and bowls are provided with draining holes
- Efficient heat shield to limit the heat loss
- Shaft fans/radiators to reduce temperature, protect and increase lifetime of the pump bearings
- Nitrogen/air quench connection to allow tank blanketing
- Thrust bearing located in the pump
Design Options
- Wide mesh suction strainer
- High Nss mixed-flow first-stage impeller for reduced NPSHR
- Interchangeable sleeves under the line shaft bearings
- Thrust bearing located in the motor
