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 O-Ring
• Pumping device independent of direction of rotation
•
Advantages
• Ideal seal for standardizations
• Universal applicable for packings conversions, retrofits or
OEM
• Suitable for high temperature
• 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 damage of the shaft by dynamically loaded O-Ring
• Self cleaning effect of the bellows
• Installation faults are avoided, cost-effective
• No damage caused by dirt entered during assembly
• Straightforward and easy installation due to
• preassembled unit (reduced down-times)
• Individual adaptation to pump design possible
Operating range (see note on page 1)
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 PSI)
API Plan 52 (53/54)
Pump startup:
Δp (p3 - p1 )max. 16 bar (232 PSI) allowed
* Operating limits of O-Rings to be observed
Audited Supplier 
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