Bơm trục vít KRAL có khớp nối từ

Critical fluids containing substances endangering the health or the environment should not leak to the atmosphere. In contrast to conventional shaft seals, KRAL screw pumps with magnetic coupling are hermetically sealed by the integrated containment can. People and the environment are not endangered.

Thermal distortion and the temperature limits of elastomeric sealing elements restrict the use of screw pumps in high temperature applications. If temperatures up to 300 °C are handled, KRAL screw pumps with magnetic coupling are the right choice.

Spare parts and maintenance costs for mechanical seals increase the life cycle costs. Mechanical seals in KRAL screw pumps have a high technological standard. Even during proper operation, however, they are still a wearing part. KRAL screw pumps with magnetic coupling are maintenance-free and pay for themselves after just three years.

With conventional seals, oxygen from the atmosphere may diffuse through the sealing gap into the fluid. When the fluid crystallizes from contact with oxygen, the process is interrupted and expensive plant shutdowns can result. KRAL screw pumps with magnetic coupling are hermetically sealed and protect the integrity of the fluid.

A magnetic coupling must transmit high torques and therefore requires very strong or many magnets. It can therefore become large and expensive. Not so with KRAL: When developing the magnetic coupled screw pumps, technical optimization was just as important as the cost aspect. The result: the screw pumps and magnetic coupling are optimally matched to each other, and the magnetic coupling pumps can be offered at an attractive price/performance ratio.

If the operating limits are exceeded, the screw pumps may become damaged. Solids in the fluid can lead to blockages and damage the screw and the housing. In most cases, the product produced is not to specification, and the screw pumps must be replaced. If the decoupling is controlled, and the screw pumps stop, the screw pumps and magnetic coupling will suffer no damage. The magnetic coupling can prevent consequential damage.

• Leak-free – no collection of residues.
• Wear-free – no maintenance.
• Hermetically sealed – no leakage of liquid.
• No plant standstill due to oxygen ingress.
• Temperature resistance up to 300 °C.
• High flow rates for all motor sizes.
• Rapid amortisation of the investment.
• Max. differential pressure: 100 bar.
• For many different applications – as you can see in our product catalog or on our website pump overview.