Mtex Dual seals

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Mtex Dual seals

Mtex Dual seals
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Item Description
1 Bellows unit
2 O-Ring
3 Set screw
4 Seat
5 O-Ring
6 Shaft sleeve
7 O-Ring
8 Cover
9 Seal face
10 O-Ring
11 Spring
12 Seat
13 O-Ring
14 Drive collar
15 O-Ring
16 Set screw
17 Retaining ring
18 Assembly fixture
19 Hex socket head screw
20, 22 Gasket
23 Screw plug

Mtex Dual seals

Features

  • Double seal
  • Mtex-DN: API Plan 52 (53/54)
  • Mtex9-DN: API Plan 53/54
  • Cartridge
  • Balanced
  • Independent of direction of rotation
  • Metal bellows
  • Stationary Springs
  • Pumping device independent of direction of rotation

Advantages

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

Operating range

Shaft diameter:
d1 = 25 ... 80 mm (1" … 3.15")
Temperature:
t* = –40 °C ... +220 °C (–40 °F ... + 428 °F)
Pressure: p1 = 25 bar (232 PSI)
Sliding velocity: vg = 20 m/s (66 ft/s)

Barrier fluid circulation system:
p3max = 16 bar (232 PSI)
Δp (p3–p1) ideal = 2 … 3 bar (29 … 44 PSI)
Δp (p3–p1) max.
= 10 bar (145 PSI) at <120 °C (<248 °F)
= 5 bar (73 PSI) at ≤ 220 °C (≤232 °F)

API Plan 52 (53/54)

Pump startup:
Δp (p3–p1) max.16 bar (232 PSI) allowed

* Operating limits of O-Rings to be observed

Materials

Seal face:
Carbon graphite (A), Silicon carbide (Q1)
Seat:
Silicon carbide (Q1), Tungsten carbide (U2)
Secondary seals:
FPM (V), EPDM (E), FFKM (K)
Bellows: Inconel® 718 (M6)
Springs: Hastelloy® C-4 (M)
Metal parts: CrNiMo steel (G), Duplex (G1)

Recommended piping plans

EagleBurgmann TS 2000 Thermosiphon system

Product link:
EagleBurgmann TS2000

Detailed information
on these API 682 4th edition plans:
API Plan 52
API Plan 53A
API Plan 53B
API Plan 53C
API Plan 54


Product variants

Mtex9-DN
Dimensions, items and descriptions as for Mtex-DN, but with optimized seal face geometry for pressurized operation according to API Plan 53/54. A barrier fluid system (e.g. EagleBurgmann TS2000) is necessary.

Pressure: p1 = 10 bar (145 PSI)
Sliding velocity: vg = 20 m/s (66 ft/s)

Barrier fluid circulation system:
p3max = 16 bar (232 PSI)
Δp (p3 – p1) ideal = 2 … 3 bar (29 … 44 PSI)
Δp (p3 – p1) max = 16 bar (232 PSI)

API Plan 53/54

Pump startup:
Δp (p3 – p1) max = 16 bar (232 PSI) allowed

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The Eagleburgmann Group

Sealing technology for plants and machines

EagleBurgmann is one of the worldwide leading providers of industrial sealing technology. Mechanical seals, seal supply systems, magnetic couplings, carbon floating ring seals, expansion joints, gaskets and packings as well as comprehensive services are used wherever reliability and safety are needed.

Mechanical seals and more

Sealing technology by EagleBurgmann is used worldwide in oil and gas industries, refineries, the petrochemical, chemical, and pharmaceutical industries, food processing, energy, water, mining, paper, aerospace, and other industries. Close to 5,800 employees provide their ideas, solutions, and commitment so that customers can rely on our sealing technology.

What makes us stand out is our excellent quality, great innovative capacity, and an extensive product portfolio for nearly all industrial processes and fields of application. Our product portfolio includes everything from mechanical seals and seal supply systems to magnetic couplings, carbon floating ring seals, expansion joints, and gaskets and packings as well as comprehensive services. Since we are part of the German Freudenberg and Japanese EKK group, we have all the necessary resources for a firmly based reliable partnership.

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