Mechanical seals for pumps

M2N M2N
  • For plain shafts
  • Single seal
  • Unbalanced
  • Conical spring rotating
  • Dependent on direction of rotation
Cartex  Single seals Cartex
Single seals
  • Single seal
  • Cartridge
  • Balanced
  • Independent of direction of rotation
  • Single seals without connections (-SNO), with flush (-SN) and with quench combined with lip seal (-QN) or throttle ring (-TN)
  • Additional variants available for ANSI pumps (e.g. -ABPN) and eccentric screw pumps (-Vario)
eMG1 eMG1
  • For plain shafts
  • Elastomer bellows rotating
  • Unbalanced
  • Independent of direction of rotation
  • Single and dual seal
MBS100 MBS100
  • For unstepped shafts
  • Rotating bellows
  • Single Seal
  • Balanced
  • Independent of direction of rotation
HR HR
  • Single seal
  • Balanced
  • Independent of direction of rotation
  • Multiple springs stationary
  • Seat rotating
  • Seat arranged directly behind the impeller
  • Spring protection sleeve
  • Variant with cylindrical spring and acc. EN 12756 (HRZ1) available
  • Variant as cartridge with/without guide sleeve for application with/without quench (HR2, HR3)
  • Dual seal as cartridge unit (HRKS-D) available
Splitex Splitex
  • Fully split single seal, 2 x 2 segments, pre-assembled
  • Semi-cartridge
  • Balanced
  • Stationary springs
  • Bi-directional
  • External pressurization
  • Built-in flushing connections
  • Installation and wear control
M3N M3N
  • For plain shafts
  • Single seal
  • Unbalanced
  • Rotating conical spring
  • Dependent on direction of rotation
Cartex  Dual seals Cartex
Dual seals
  • Dual seal
  • Cartridge
  • Balanced
  • Independent of direction of rotation
  • Double pressure balanced
  • Integrated pumping device
  • Variants available: for eccentric screw pumps (-Vario) and gas-lubricated version (-GSDN)
eMG eMG
  • For plain shafts
  • Elastomer bellows rotating
  • Unbalanced
  • Independent of direction of rotation
  • Single and dual seal
MFL85N MFL85N
  • For unstepped shafts
  • Single seal
  • Balanced
  • Independent of direction of rotation
  • Metal bellows rotating
HRC...N HRC...N
  • Cartridge
  • Balanced
  • Independent of direction of rotation
  • Stationary multiple springs
  • Spring protection sleeve
  • Variant for operation with pressureless quench available (HRC2000N)
  • Dual seal with and without pumping screw (HRC3300NF, HRC3300N) available
HGH201 HGH201
  • For plain shafts (HGH201)
  • Semi split single seal
  • Multiple springs rotating
  • Balanced
  • Independent of direction of rotation
  • Unsplit as original equipment (HGH200)
  • Cartridge available (based on HGH210)
  • Variant for stepped shafts available (HGH211)
  • Splitted seal parts:
    sliding faces and O-rings
EM300 EM300
  • Balanced
  • Independent of direction of rotation
  • Stationary multiple springs
  • API682 arrangement 2 containment seal
M7N M7N
  • 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)
Cartex ANSI  
Single seals Cartex ANSI
Single seals
  • Single seal
  • Available for standard (Cartex-ASPN) and big bore (Cartex-ABPN) seal chambers
  • Cartridge
  • Balanced
  • Independent of direction of rotation
  • Single seals with flush (-ASPN, -ABPN) and with quench combined with lip seal (-ASQN, -ABQN) or throttle ring (-ASTN, -ABTN)
MG1 MG1
  • For plain shafts
  • Single and dual seal
  • Elastomer bellows rotating
  • Unbalanced
  • Independent of direction of rotation
  • No torsion on bellows
MFLWT MFLWT
  • For unstepped shafts
  • Single Seal
  • Balanced
  • Independent of direction of rotation
  • Metal bellows rotating
LP-D LP-D
  • Integrated seal for Sulzer A pumps
  • Dual seal, balanced
  • Semi cartridge unit
  • Independent of direction of rotation
  • Double pressure balanced
  • Internal barrier fluid circulation
  • Static springs on both sides
  • No dynamic O-Ring on shaft
  • Rugged design
  • Shrink-fitted seal faces
  • Seal faces have a large clearance to the shaft
  • Wear part cost minimized
  • Optimized design for Non-Flow use
CGSH-K CGSH-K
  • For stepped shafts
  • Balanced
  • Rotating spring
  • Single or double seal available
  • Standard version with U-grooves, V-grooves optional (dependent of direction of rotation)
  • Gas-lubricated
  • Does not open in the event of buffer pressure failure, self closing at pressure reversal
M74-D M74-D
  • For plain shafts
  • Dual seal
  • Unbalanced
  • Rotating multiple springs
  • Independent of direction of rotation
  • Seal concept based on the M7 range
  • Variant with pumping screw available (M74F-D)
Cartex ANSI  Dual seals Cartex ANSI
Dual seals
  • Dual seal
  • Available for standard (Cartex-ASDN) and big bore (Cartex-ABDN) seal chambers
  • Cartridge
  • Balanced
  • Independent of direction of rotation
  • Double pressure balanced
  • Integrated pumping device
MG9 MG9
  • For plain shafts
  • Single and dual seal
  • Elastomer bellows rotating
  • Unbalanced
  • Independent of direction of rotation
  • No torsion on bellows and spring
  • Conical or cylindrical spring
  • Metric and inch sizes available
  • Special seat dimensions available
  • US Patent No. 6.220.601
MFLCT MFLCT
  • For unstepped shafts
  • Single seal
  • Balanced
  • Independent of direction of rotation
  • Metal bellows rotating
LP-S LP-S
  • Integrated seal for Sulzer A pumps
  • Single + Plan 11 flush
  • Semi cartridge unit
  • Balanced
  • Independent of direction of rotation
  • Static springs
  • No dynamic O-Ring on shaft
  • Rugged design
  • Shrink-fitted seal faces
  • Seal faces have a large clearance to the shaft
  • Wear part cost minimized
GSO-DN GSO-DN
  • Seat rotating
  • Stationary springs
  • Double seal
  • Balanced
  • Standard version with V-grooves, U-grooves optional (independent of direction of rotation)
  • Gas-lubricated
HA211 HA211
  • Single seal
  • Unbalanced
  • Independent of direction of rotation
  • Positive torque transmission due to bayonet drive between seal head and drive collar
  • O-Ring groove for ventilation prevents solids build-up and enhances flexibility
MA290 / MA291 MA290 / MA291
  • Cartridge
  • Balanced
  • Independent of direction of rotation
  • Stationary multiple springs
  • Springs and pin located on the atmospheric side
EA560 EA560
  • Single seal
  • Loosely inserted seal face provides self-adjusting capability
  • In-house manufactured sliding parts
MF95N MF95N
  • For unstepped shafts
  • Rotating bellows
  • Single Seal
  • Balanced
  • Independent of direction of rotation
  • Roller bellows
SH(V) SH(V)
  • Cartridge design
  • Single seal
  • Balanced
  • Multiple springs
  • Stationary spring loaded unit
  • Shrink-fitted seal face
HRGS-D HRGS-D
  • Double seal
  • Balanced
  • Standard version with U-grooves (bi-directional)
  • Gas-lubricated
H7N H7N
  • For stepped shafts
  • Single seal
  • Balanced
  • Super-Sinus-spring or multiple springs rotating
  • Independent of direction of rotation
  • Integrated pumping device available (H7F, H75F)
  • Variant with seat cooling available (H75G115)
MA390 / MA391 MA390 / MA391
  • Cartridge
  • Balanced
  • Independent of direction of rotation
  • Stationary multiple springs
  • Springs and pin located on the atmospheric side
Mtex Single seals Mtex Single seals
  • Single seal
  • Cartridge
  • Balanced
  • Independent of direction of rotation
  • Metal bellows
  • Single seal with quench and lip seal (-QN) or throttle ring (-TN)
  • Version available with multipoint injection ring (-QNM, -TNM)
  • Supply connections for flush (A) and quench (B)
ED560 ED560
  • Dual seal
  • Good chemical resistance and ability to handle solids
  • In-house manufactured sliding parts
MFL65 MFL65
  • Stationary bellows
  • Single Seal
  • Balanced
  • Independent of direction of rotation
SHF / SHP SHF / SHP
  • Cartridge design
  • Single seal
  • Balanced
  • Multiple springs
  • Dependent of direction of rotation
  • Integrated pumping device
  • Stationary spring loaded unit
  • Shrink-fitted seal face
LB500 LB500
  • Single seal
  • Balanced
  • Independent of direction of rotation
  • Rotating multiple springs
EA100 EA100
  • Single seal
  • In-house manufactured carbon seal faces
  • Three different impeller connections available
YE400 YE400
  • Single seal
  • Balanced
  • Independent of direction of rotation
  • Stationary metal bellows
SHPV / SHFV SHPV / SHFV
  • Cartridge design
  • Single seal
  • Balanced
  • Dependent of direction of rotation
  • Integrated pumping device
  • Stationary spring loaded unit
  • Multiple springs
  • Shrink-fitted seal face
EK700 EK700
  • Single seal
  • Balanced
  • Independent of direction of rotation
  • Stationary multiple springs
Mtex Dual seals Mtex Dual seals
  • 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
eCartex  Single seals eCartex
Single seals
  • Single seal
  • Cartridge
  • Balanced
  • Independent of direction of rotation
  • Single seals without connections (-SNO), with flush (-SN) and with quench combined with lip seal (-QN) or throttle ring (-TN)
  • Additional variants available for ANSI pumps (e.g. -ABPN) and eccentric screw pumps (-Vario)
EH700 EH700
  • Single seal
  • Stationary spring-loaded unit enables operation in high-range loads area
  • Balanced
  • In-house manufactured carbon seal faces
SAF(V) / SAP(V) SAF(V) / SAP(V)
  • Cartridge design
  • Single seal
  • Balanced
  • Dependent on direction of rotation
  • Integrated pumping device
  • Stationary spring loaded unit
  • Inserted seal face
  • Rotating carbon seat
Pulace Pulace
  • Single seal
  • Balanced
  • Independent of direction of rotation
  • Stationary multiple springs
  • Springs and pins not in contact with the medium
eCartex  Dual seals eCartex
Dual seals
  • Dual seal
  • Cartridge
  • Balanced
  • Independent of direction of rotation
  • Double pressure balanced
  • Integrated pumping device
  • Variants available: for eccentric screw pumps (-Vario) and gas-lubricated version (-GSDN)
BT-AR BT-AR
  • Rubber bellows mechanical seal
  • Unbalanced
  • Single spring
  • Independent of direction of rotation
  • Short axial installation length
SHF(V)-D / SHP(V)-D SHF(V)-D / SHP(V)-D
  • Cartridge design
  • Dual seal
  • Balanced
  • Integrated pumping device
  • Stationary spring loaded unit
  • Multiple springs arrangement
  • Shrink-fitted seal face
  • One rugged seat
HRN HRN
  • Single seal
  • Balanced
  • Independent of direction of rotation
  • Stationary springs
  • Dual seals in tandem as well as back-to-back arrangements (also in combination with H10 seal)
eCartex ANSI  Single seals eCartex ANSI
Single seals
  • Single seal
  • Available for standard (eCartex-ASPN) and big bore (eCartex-ABPN) seal chambers
  • Cartridge
  • Balanced
  • Independent of direction of rotation
  • Single seals with flush (-ASPN, -ABPN) and with quench combined with lip seal (-ASQN, -ABQN) or throttle ring (-ASTN, -ABTN)
BT-A2 BT-A2
  • Rubber bellows mechanical seal
  • Unbalanced
  • Single spring
  • Independent of direction of rotation
  • Stationary design
DF-SA DiamondFace DF-SA DiamondFace
  • Cartridge design
  • Single seal
  • Balanced
  • Integrated pumping device
  • Stationary spring loaded unit
  • Inserted seal ring
  • Rotating mating ring
    (DiamondFace coated)
HJ92N HJ92N
  • For unstepped shafts
  • Single seal
  • Balanced
  • Independent of direction of rotation
  • Encapsulated rotating spring
eCartex ANSI  Dual seals eCartex ANSI
Dual seals
  • Dual seal
  • Available for standard (eCartex-ASDN) and big bore (eCartex-ABDN) seal chambers
  • Cartridge
  • Balanced
  • Independent of direction of rotation
  • Double pressure balanced
  • Integrated pumping device
BT-PN BT-PN
  • Rubber bellows mechanical seals
  • Unbalanced
  • Single spring
  • Independent of direction of rotation
DF-(P)DGS6 
DiamondFace DF-(P)DGS6
DiamondFace
  • DiamondFace bonded primary seal faces
  • Safe cupped retainer for rotating ring
  • Fully operational in both liquid and gas phases
  • Bi-directional
  • Ready-to-fit cartridge unit
  • Single, double, tandem and tandem seal with intermediate labyrinth arrangement available
H3B H3B
  • Single Seal
  • Balanced
  • Independent of direction of rotation
AX5 AX5
  • Unbalanced
  • Independent on direction of rotation
H12N H12N
  • For stepped shafts
  • Single seal
  • Balanced
  • Dependent of direction of rotation
  • Torque transmission via conical spring
Unitex Unitex
  • Single cartridge seal
  • Elastomer bellows
  • Unbalanced
  • Independent of direction of rotation
  • Rotating spring
  • Bellows and spring free from torsion
  • Metric and inch sizes available
H10 / H8 H10 / H8
  • Single seal
  • Balanced
  • Independent of direction of rotation
  • Stationary multiple springs
H75VN H75VN
  • Single seal
  • Cartridge unit
  • Design acc. to API 682 / ISO 21049
  • Category 2 and 3, Type A, Arrangement 1
  • Independent of direction of rotation
  • Rotating multiple springs
  • Integrated pumping device available (H75VP)
H75VK H75VK
  • Dual seal
  • Cartridge unit
  • Design acc. to API 682 / ISO 21049
  • Category 2/3, Type A, Arrangement 2 or 3
  • Bi-directional design available
  • Rotating multiple springs
  • Integrated pumping device available
  • Suitable for pressure reversals
H74-D H74-D
  • For stepped shafts
  • Dual seal
  • Balanced
  • Rotating multiple springs
  • Independent of direction of rotation
  • Seal concept based on the H7 range
  • Variant with pumping screw available (H74F-D)
LA200 LA200
  • Single seal
  • Unbalanced
  • Independent of direction of rotation
  • Rotating multiple springs
AX25 AX25
  • External configuration
  • Balanced
  • Independent of direction of rotation
  • Independent of pressure direction
AX25D AX25D
  • Dual seal
  • Balanced
  • Independent of direction of rotation
  • Independent of pressure direction
AX30 AX30
  • Unbalanced
  • Dependent on direction of rotation
  • Solid seats
AX40K AX40K
  • Stationary springs
  • Balanced
  • Independent of direction of rotation
  • Independent of pressure direction
eMG1 and eMG
eMG1 and eMG

The new generation of elastomer bellows seals for pumps. Learn more about our new eMG1 and eMG!

DiamondFace
DiamondFace

Our innovative DiamondFace technology is applicable in numerous industries. Find out more...

DF-(P)DGS6
DF-(P)DGS6

Learn more about our innovative & unbeatable mechanical seal DF-(P)DGS6

Find the right product

DF-SA
DF-SA

Learn more about our diamond-coated high-performance DF-SA seal

eCartex
eCartex

Learn more about our eCartex

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