Code Profile Diagram Remarks

Bore surface roughness

requirement

M

Outer metal case with rubber lining. Similar to design B but an additional rubber lining covering the internal face of the steel case. Particularly suitable for applications where corrosion could be a problem.

BC

J

Remark: “

“ ” r

Rubber and case covered O.D. This design provides the benefit of a metal-to metal press fit and the rubber O.D. sealing ability to counter rough or worn housings.

Rubber O.D. with flange

This design will allow easy installation or replacement, gives additional structural rigidity and restricts the installation depth into the housing.

” represents Ra 2.5 µm Max.

epresents Ra 3.75 µm Max.

Seal lip with hydrodynamic aid design have greater pumping rate than normal seal

lip design (Figure 4-1).

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0 500 1000 1500 2000 2500 3000 3500 4000SHAFT SPEED-RPM

PUM

P R

ATE

-CC

/MIN

ONE-DIRECTIONBI-BIRECTIONWITHOUT-AIDS

<Figure 4-1> Measured pump rate for various hydrodynamic design.

Fluid viscosities have influence on the pumping rate. (Figure 4-2)

Example: SCR 30*50*7

0

0.1

0.2

0 1000 2000 3000 4000 5000 6000

SHAFT SPEED-RPM

PUM

P R

ATE

-CC

/MIN

SAE 80W-90SAE 15W-20

<Figure 4-2> Pump rate versus fluid viscosity.

(1). Bi-directional：W type ⇔

Type Helix Profile Diagram

Lip Profile Diagram

Type Helix Profile Diagram

Lip Profile Diagram

W

W6

W1

W7

W2

W8

W3

W9

W4

W10

W5

W11

Type Helix Profile Diagram

Lip Profile Diagram

Type Helix Profile Diagram

Lip Profile Diagram

W12

W18

W13

W19

W14

W20

W15

W21

W16

W22

W17

W23

Type Helix Profile Diagram

Lip Profile Diagram

W24

(2). One-directional：L type ⇐

Type Helix Profile Diagram

Lip Profile Diagram

Type Helix Profile Diagram

Lip Profile Diagram

L

L3

L1

L4

L2

L5

Type Helix Profile Diagram

Lip Profile Diagram

Type Helix Profile Diagram

Lip Profile Diagram

L6

L9

L8

L10

(3). One-directional：L type ⇒

Type Helix Profile Diagram

Lip Profile Diagram

Type Helix Profile Diagram

Lip Profile Diagram

R

R3

R1

R4

R2

R6

Capacity Type

Speed (m/s) Pressure (bar)

Run-out (mm)

STBM (mm)

TC4P

TC4P

0.28 Max. 25 Max. -- 0.30 Mx.

TC-PL

TB-PL

30 Max. 0.5 Max. 0.25 Max. 0.25 Max.

15 Max. 3 Max. PA1

PA2

5 Max. 1 Max.

0.20 Max. 0.40 Max.

DC

DM

10 Max. 0.3 Max. 0.25 Max. 0.25 Max.

OSC

OSM

10 Max. 0.3 Max. 0.25 Max. 0.25 Max.

CNB

CNB2

0.075 Max.

98 Max. (NBR)

157 Max. (HNBR)

-- 0.30 Max.

Capacity Type

Speed (m/s) Pressure (bar)

Run-out (mm)

STBM (mm)

0.2 Max. 6.5 Max.

0.6 Max. 4.4 Max.

1.0 Max. 2.5 Max.

TC4

TC4S

1.5 Max. 1.6 Max.

-- 0.20 Max.