CDFI & CDFC Double Mechanical Seal – CDSA and DMSF Hybrid Design

Features

• Integral deflector guides barrier fluid under faces and extends seal life
• Incorporates highly effective bi-directional pumping ring to maximise barrier flow and increase seal life
• Bi-Metal CDFI™ / CDFC™ options also include exotic allow wetted components at minimum price premium for use with corrosive chemicals
• Hydraulically balanced seal-face technology for reduced power consumption
• Non-shaft-fretting sleeve elastomer and positive set screw shaft drive
• Independant seal face design to enhance safe containment of process fluid in the event of damage to any individual sealing element
• Multiple spring seal face loading
• Sizes available from 1.125" to 5.000" (28mm - 125mm) in standard and ANSI Plus gland formats

Directed Barrier Fluid Circulation

Removing the heat at the inboard faces is critical for any double mechanical seal. The CDFI™ / CDFC™ directed barrier fluid flow path achieves effective heat removal at both sets of seal faces.

Bi-directional Barrier Fluid Circulation

Developed using the highly efficient patented DMSF™ pumping ring the CDFI™ will effectively and reliably circulate barrier fluid irrespective of the direction of shaft rotation.

Alternatively, in applications which use an external barrier fluid circulation device, such as a PUMPPAC™, or where fluid convection is required, the CDFC™ may be offered.

Fits in Thin Radial Cross Sectional Spaces

Like the CDSA™, the CDFI™ / CDFC™ can be installed on equipment with radial cross sectional spaces as small as 0.312” (8mm). This is typical on some smaller sized process pumps.