Multiple springs mechanical seals

Features

• Cartridge design

• Dual seal

• Balanced

• Integrated pumping device

• Stationary spring loaded unit

• Multiple springs arrangement

• Shrink-fitted seal face

• One rugged seat

Advantages

• Deformation-optimized seal for high pressures and high sliding velocities (static up to 500 bar (7,250 PSI))and dynamic up to 150 bar (2,175 PSI))

• Economical due to standardized inner components

• High flexibility due to adaptation of the connection parts to the pump seal chamber

• Optimum heat dissipation due to integrated pumping device

• Insensitive to shaft deflections due to stationary design

• Dual seal does not open even in the event of barrier fluid pressure failure

• Reliable operation due to one rugged seat with bandage

• Version with loose-fitted seal face available, for extreme applications

• Only small number of components

Operating range

Shaft diameter: 
d1* = 40 ... 250 mm (1.57" ... 9.84")
Pressure: p3 = 150 bar (2,175 PSI)
Temperature: t = +200 °C (+392 °F)
Sliding velocity: vg = 60 m/s (197 ft/s)

* Other sizes on request

Materials

Seal face: 
SiC-C-Si, silicon impregnated carbon (Q3), 
Carbon graphite antimony impregnated (A)
Seat: Silicon carbide (Q)
Secondary seals: 
FKM (V), EPDM (E), FFKM (K)
Springs: Hastelloy® C-4 (M)
Metal parts: CrNiMo steel (G), Duplex (G1), Super Duplex (G4), Pure Titanium (T2), Hastelloy® C-4 (M)

Materials

Seal face: 
SiC-C-Si, silicon impregnated carbon (Q3), 
Carbon graphite antimony impregnated (A)
Seat: Silicon carbide (Q)
Secondary seals: 
FKM (V), EPDM (E), FFKM (K)
Springs: Hastelloy® C-4 (M)
Metal parts: CrNiMo steel (G), Duplex (G1), Super Duplex (G4), Pure Titanium (T2), Hastelloy® C-4 (M)