SE-M7N & M74

Product Overview

SE-M7N and SE-M74 Mechanical Seal for Chemical Centrifugal Pumps, KSB Water Pumps and Double Suction Pumps. Single end, wave spring (M7N), multi springs (M74), unbalanced, independent direction of rotation, lug transmission. M7N has a simple way of transmission and good compatibility; the wave spring structure allows transferring particulate, crystalized and high viscosity content. M74 also has a simple way of transmission and the compensation components are pre-assembled; it is easy to install and has good compensation. The load on the seal faces are balanced and the sealing performance is stable and reliable. The default design of M7N/M74 are using square lug transmission, which according to the feedback of users, would be possible to cause the damage of the rotary seal ring or the square lug itself. Sweden Seals optimized the design of the lug here with a new model named M74R, with a rounded corner lug, reducing the risks of damaging the seal rings and the lug by over 70%.

Technical Specifications

• Model: SE-M7N, M74, M74D (2 M74 Seals)
• Design: Unbalanced
• Pressure: 1.6 MPa or Less
• Temperature: –40°C to 200°C
• Linear Speed:  20 m/s or less
• Size Range: ID 20 mm to 300 mm