Mechanical seal Types 321, 322 and 323

Mechanical seal Types 321, 322 and 323

The types 321, 322 and 323 are stationary, tandem-active double cartridge mechanical seals with integrated barrier fluid pumping assistance. The double pressure balancing of the seal faces on the product side ensures one the one hand that the seal faces do not open in case of pressure reversal. and on the other that the balancing for reducing the friction values is present under all pressure conditions.

The respective product versions differ by their seal chamber cross-sections.

Advantages

Self-closing in case of pressure reversal
Venting option
Cartridge-mounted
Double balanced
Tandem active
Independent of the direction of rotation
Multiple springs made of Hastelloy C
Springs outside the medium - no blockage of the springs
Vibration-dampend stationary face support

Technical details

Range of application*
Pressure	700 mm Hg - 28 bar
Temp.	Elastomer dependent
Sliding velocity	up to 35 m/s
Shaft movements	axial ≤ Ø 22 +/- 0,5 mm \| ≥ Ø 24 +/- 1,0 mm
	radial ≤ Ø 22 +/- 0,4 mm \| ≥ Ø 24 +/- 0,5 mm

Sizes
D_shaft	16 - 160 mm
	5/8“ - 6 ¼“
	Special sizes available on request
Materials
Metals	DIN 1.4571/Hast. C
Springs	Hast. C
Faces	CA, SC, SSIC, TC
O-Rings	FKM, EPDM, PTFE, FEP Umm., Chemraz, Kalrez, Aflas, etc.

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.