Features
Equivalent to Type MTEX Dual seals
Double seal
SSMtex-DN: API Plan 52 (53/54)
SSMtex9-DN: API Plan 53/54
Cartridge
Balanced
Independent of direction of rotation
Metal bellows
Stationary Springs
Pumping device independent of direction of rotation
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 (p3p1) ideal = 2 3 bar (29 44 PSI)
Δp (p3p1) max.
= 10 bar (145 PSI) at = 5 bar (73 PSI) at ≤ 220 °C (≤232 °F)
API Plan 52 (53/54)
Pump startup:
Δp (p3p1) 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 applications
Process industry
Chemical industry
Hot media
Cold media
Highly viscous media
Pumps
Special rotating equipment
SSMtex9-DN
Dimensions, items and descriptions as for SSMtex-DN, but with optimized seal face geometry for pressurized operation according to API Plan 53/54. A
barrier fluid system 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
Audited Supplier 
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