Mechanical seal Type 301

The type 301 is a stationary single-cartridge seal. Thanks to its extremely short design, the type 301 is also suitable for cramped stuffing boxes with a cross-section from 7.95 mm (5/16"). The precision lost-wax casting process for the glands impresses through a high surface quality and an inexpensive sales price.

The type 301 is supplied in an O-ring design.

  • Glands with ¼" NPT axial flush and quench connections
  • Shock and vibration-dampend faces
  • Springs outside the medium
  • Independent of the direction of rotation
  • Extremely short design
  • Suitable for cramped stuffing boxes from 7.94 mm (5/16") cross-section
Technical details
Range of application*  
Pressure 700 mm Hg - 28 bar
Temp. Elastomer dependent
Sliding velocity up to 35 m/s
Shaft movements axial +/- 1,0 mm
  radial +/- 0,5 mm
Dshaft 24 - 160 mm
  1“ - 6 ¼“
  Special sizes available on request
Metals DIN 1.4571 / 316 SS
Springs Hast. C
Faces CA, CE, SC, SSIC, TC
O-Rings FKM, EPDM, PTFE, FEP Umm., Chemraz, Kalrez, Aflas, etc.
Membrane (bellows) Hast. C, AM 350
Rolled bellows Hast. C, Incolloy

Other sizes, materials or design variations upon request.
* Maximum temperature / pressure / speed indicates operating extremes independently and does not imply the seal will function at these extremes at the same time. Contact DEPAC if in doubt.