Super Sinus Spring Multiple Springs Rotating M7N M74 Chemineer Chemical Plain Shafts Pump Mechanical Seal

Features

· For plain shafts

· Single seal

· Unbalanced

· Super-Sinus-spring or multiple springs rotating

· Independent of direction of rotation

· Variant with PTFE secondary seals for high chemical resistance (M78N)

Advantages

· Universal application opportunities

· Efficient stock keeping due to easily interchangeable faces

· Extended selection of materials

· Insensitive to low solids contents

· Flexibility in torque transmissions

· Self cleaning effect

· Short installation length possible (G16)

· Pumping screw for media with higher viscosity (M7..F)

Operating range

Shaft diameter:
d1 = 14 ... 100 mm (0.55 " … 3.94 ")
Pressure:
p1 = 25 bar (363 PSI)
Temperature:
t = -50 °C ... +220 °C
(-58 °F ... +428 °F)
Sliding velocity:
vg = 20 m/s (66 ft/s)

Axial movement:
d1 = up to 25 mm: ±1.0 mm
d1 = 28 up to 63 mm: ±1.5 mm
d1 = from 65 mm: ±2.0 mm

Materials

Seal face: Special cast CrMo steel (S), Silicon carbide (Q1, Q2), Aluminium oxide (V)
Seat G9: Carbon graphite antimony impregnated (A), Carbon graphite resin impregnated (B), Silicon carbide (Q1*, Q2*)
Seat G4: Silicon carbide (Q1*, Q2*)
Seat G6: Silicon carbide (Q1*, Q2*)
Seat G13: Carbon graphite antimony impregnated (A), Carbon graphite resin impregnated (B)

Secondary seals: EPDM (E), NBR (P), FKM (V), FFKM (K)
Springs: CrNiMo steel (G) Metal parts: CrNiMo steel (G), Duplex (G1)

* Cannot be combined with seal face made of S

Standards and approvals

· EN 12756

Recommended applications

· Process industry

· Chemical industry

· Pulp and paper industry

· Water and waste water technology

· Shipbuilding

· Lube oils

· Low solids content media

· Water / sewage water pumps

· Chemical standard pumps

· Vertical screw pumps

· Gear wheel feed pumps

· Multistage pumps (drive side)

· Circulation of printing colors with viscosity 500 ... 15,000 mm²/s.

Product variants

M74
Dimensions, items and descriptions as for M7N, but with multiple springs (Item no. 1.5).
Preferably for d1 >100 mm (3.94").

M7F
Shaft diameter d1 = max. 100 mm (3.94")
Dimensions, items and descriptions as for type M7N, but with pumping screw, dependent on direction of rotation.
(Viscosity ≤ ISO VG10).

M74F
Shaft diameter:
d1 = 14 ... 200 mm (0.55" ... 7.87")
Dimensions, items and descriptions as for type M7N, but with multiple springs and pumping screw, dependent on direction of rotation.
(Viscosity ≤ ISO VG10).

M7S2
Shaft diameter: d1 = max. 100 mm (3.94").
Dimensions, items and descriptions as for type M7N, but with drive key.
(without item no. 1.6)

M74S2
Shaft diameter:
d1 = 28 … 200 mm (1.10" ... 7,87")
Dimensions, items and descriptions as for type M7N, but with multiple springs and drive key.
(without item no. 1.6)

M78N
Shaft diameter:
d1 = 18 … 100 mm (0.71" … 3.94")
Temperature: t = max. 180 °C (356 °F)

Dimensions, items and description as for M7N. Design of the seal face especially for secondary sealing element made of PTFE (T).
Seal face: Carbon graphite antimony impregnated (A), Carbon graphite resin impregnated (B), Silicon carbide (Q1)*
Seat G9: Special cast CrMo steel (S)*, Silicon carbide (Q1)

* Cannot be combined with seal face made of silicon carbide (Q1)

Single seal
Unbalanced
Independent of direction of rotation
To EN12756 (DIN24960)
BGM7 series has a wide application scope and high interchangeability. It is compact in structure. The drive collar is clamped by the drive lug to prevent the spring from dropping. It is reliable in performance and widely used in petrochemical pumps.
Combination of materials
Sealing face
Graphite, Silicon carbide, Tungsten carbide,Aluminum oxide
Secondary sealing
Acrylonitrile rubber, Fluorine rubber, Ethylene propylene rubber,Silicon rubber,PTFE Metal component
Stainless steel
Operating limits
Specification: 14mm - 200 mm
Pressure: ≤2.5 Mpa
Temperature: -50°C - 220°C
Linear speed: ≤20m/s
Axial movement:
d1≤25 : ±1.0 mm
d1≥2863 : ±1.5 mm
d1≥65 : ±2.0 mm