Mtex Single seals

Mtex Single seals
Item Description
1 Bellows unit
2, 5, 7 O-Ring
3, 11 Set screw
4 Seat
6 Shaft sleeve
8 Cover
9 Lip seal (-QN) or throttle ring (-TN)
10 Drive collar
12 Retaining ring
13 Assembly fixture
14 Hex socket head screw
15 Gasket
16 Screw plug

Mtex Single seals


  • Single seal
  • Cartridge
  • Balanced
  • Independent of direction of rotation
  • Metal bellows
  • Single seal with quench and lip seal (-QN) or throttle ring (-TN)
  • Version available with multipoint injection ring (-QNM, -TNM)
  • Supply connections for flush (A) and quench (B)


  • Ideal seal for standardizations
  • Universal applicable for packings conversions, retrofits or OEM
  • No dimensional modification of the seal chamber necessary, small radial installation height
  • Trouble-free running due to bellows unit with vibration dampers (essential in case of dry-running)
  • No dynamically loaded O-Ring
  • Self cleaning effect of the bellows
  • Straightforward and easy installation due to pre-assembled unit (reduced down-times)

Operating range

Shaft diameter:
d1 = 25 ... 80 mm (1" … 3.15")
t* = -40 °C ... +220 °C (-40 °F ... +428 °F)
Pressure: p = 25 bar (363 PSI)
Sliding velocity: vg = 20 m/s (66 ft/s)

* Operating limits of O-Rings to be observed


Seal face: Carbon graphite antimony impregnated (A), Silicon carbide (Q1)
Seat: Silicon carbide (Q1)
Secondary seals:
Bellows: Inconel® 718 (M6)
Metal parts: CrNiMo steel (G), Duplex (G1)
Throttle ring:
PTFE carbon graphite reinforced (T12)
Lip seal: NBR (P), PTFE carbon reinforced (T3)

Product variants

Single seal, as Mtex-QN with additional multipoint injection ring (item B).
Single seal, as Mtex-TN with additional multipoint injection ring (item B).