The DRS-NS series is a double acting penstock that is designed to function reliably under the toughest conditions in an aggressive environment. High-quality plastics and stainless steel are used for production. The penstocks are applied to, among other things, treatment plants and sewage pumping stations. The unique spindle system with an internal screw spindle guarantees a long service life. Custom dimensions can be produced on request. According to BS 7775, it is recommended to apply a safety factor of 1.25 to the required torque.