| Customization: | Available |
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| Structure: | Single End |
| Pressure: | High Pressure Mechanical Seals |
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(1)Features
• 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)
(2)Advantages
• Efficient stock keeping due to easily interchangeable
faces
• Extended selection of materials
• Flexibility in torque transmissions
• Insensitive to low solids contents
• EN 12756
(For connection dimensions d1 up to 100 mm (3.94"))
(3)Operating range (see note on page 1)
Shaft diameter: d1 = 14 ... 200 mm (0.55" ... 7.87")
Pressure:
p1 = 80 bar (1,160 PSI) for d1 = 14 ... 100 mm,
p1 = 25 bar (363 PSI) for d1 = 100 ... 200 mm,
p1 = 16 bar (232 PSI) for d1 > 200 mm
Temperature: t = -50 °C ... +220 °C (-58 °F ... +428 °F)
Sliding velocity: vg = 20 m/s (66 ft/s)
Axial movement:
d1 up to 100 mm: ±0.5 mm
d1 from 100 mm: ±2.0 mm
(4)Materials
Seal face: Silicon carbide (Q1, Q2), Carbon graphite
antimony impregnated (A), Aluminium oxide (V),
Special cast CrMo steel (S)
Seat G9: Carbon graphite antimony impregnated (A),
Carbon graphite resin impregnated (B), Silicon carbide
(Q1*, Q2*)
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 in S
(5)Standards and approvals
• EN 12756
(6)Item Part no. to DIN 24250 Description
1.1 472.1 Seal face
1.2 472.2 Seal face
1.3 474 Thrust ring
1.4 485 Drive collar
1.5 477 Spring
1.6 904 Set screw
1.7 412.1 O-Ring
1.8 412.2 O-Ring
2 475.1 Seat (G9)
3 412.3 O-Ring
4 475.2 Seat (G9)
5 412.4 O-Ring
(7)Recommended applications
•Chemical industry
•Process industry
• Low solids content and low abrasive media
• Toxic and hazardous media
• Media with poor lubrication properties
• Adhesives
• Chemical standard pumps
(8)Seat alternatives
(9)Torque transmission
(10)Product variant
H74F-D
Dimensions, items and descriptions
as for H74-D, but with pumping screw (Item no. 1.4).
Dependent on direction of rotation.
Dimensions in mm
| d1 | d2 | d3 | d6 | d7 | d8 | d11 | d12 | ds | L1 | L2 | L3 | L4 | L5 | L6 | L7 | L8 | L9 | L10 | L12 | L14 | L15 | L16 | L28 | L31 | Mx | R |
| 14 | 18.0 | 33.0 | 21.0 | 25.0 | 3.0 | 24.0 | 30.0 | - | 73.0 | 18.0 | 53.0 | 26.5 | 1.5 | 4.0 | 8.5 | 17.5 | 10.0 | 7.5 | 6.5 | 5.6 | 1.5 | 5.0 | 6.6 | 17.0 | M5 | 1.2 |
| 16 | 20.0 | 35.0 | 23.0 | 27.0 | 3.0 | 29.5 | 35.0 | - | 73.0 | 18.0 | 53.0 | 26.5 | 1.5 | 4.0 | 8.5 | 17.5 | 10.0 | 7.5 | 8.5 | 7.5 | 1.5 | 5.0 | 6.6 | 17.0 | M5 | 1.5 |
| 18 | 22.0 | 37.0 | 27.0 | 33.0 | 3.0 | 29.5 | 35.0 | 42.0 | 76.0 | 20.0 | 53.0 | 26.5 | 2.0 | 5.0 | 9.0 | 19.5 | 11.5 | 8.5 | 9.0 | 8.0 | 1.5 | 5.0 | 7.5 | 17.0 | M5 | 1.5 |
| 20 | 24.0 | 39.0 | 29.0 | 35.0 | 3.0 | 32.0 | 38.0 | 44.0 | 76.0 | 20.0 | 53.0 | 26.5 | 2.0 | 5.0 | 9.0 | 19.5 | 11.5 | 8.5 | 8.5 | 7.5 | 1.5 | 5.0 | 7.5 | 17.0 | M5 | 1.5 |
| 22 | 26.0 | 41.0 | 31.0 | 37.0 | 3.0 | 32.0 | 38.0 | 45.0 | 76.0 | 20.0 | 53.0 | 26.5 | 2.0 | 5.0 | 9.0 | 19.5 | 11.5 | 8.5 | 8.5 | 7.5 | 1.5 | 5.0 | 7.5 | 17.0 | M5 | 1.5 |
| 24 | 28.0 | 43.0 | 33.0 | 39.0 | 3.0 | 36.0 | 42.0 | 47.0 | 77.0 | 20.0 | 54.0 | 27.0 | 2.0 | 5.0 | 9.0 | 19.5 | 11.5 | 8.5 | 8.5 | 7.5 | 1.5 | 5.0 | 7.5 | 17.5 | M6 | 1.5 |
| 25 | 30.0 | 45.0 | 34.0 | 40.0 | 3.0 | 39.2 | 45.0 | 49.0 | 77.0 | 20.0 | 54.0 | 27.0 | 2.0 | 5.0 | 9.0 | 19.5 | 11.5 | 8.5 | 8.5 | 7.5 | 1.5 | 5.0 | 7.5 | 17.5 | M6 | 1.5 |
| 28 | 33.0 | 48.0 | 37.0 | 43.0 | 3.0 | 42.2 | 48.0 | 51.0 | 77.0 | 20.0 | 54.0 | 27.0 | 2.0 | 5.0 | 9.0 | 19.5 | 11.5 | 8.5 | 10.0 | 9.0 | 1.5 | 5.0 | 7.5 | 17.5 | M6 | 1.5 |
| 30 | 35.0 | 50.0 | 39.0 | 45.0 | 3.0 | 44.2 | 50.0 | 54.0 | 77.0 | 20.0 | 54.0 | 27.0 | 2.0 | 5.0 | 9.0 | 19.5 | 11.5 | 8.5 | 11.5 | 10.5 | 1.5 | 5.0 | 7.5 | 17.5 | M6 | 1.5 |
| 32 | 38.0 | 55.0 | 42.0 | 48.0 | 3.0 | 46.2 | 52.0 | 59.0 | 79.0 | 20.0 | 56.0 | 28.0 | 2.0 | 5.0 | 9.0 | 19.5 | 11.5 | 8.5 | 11.5 | 10.5 | 1.5 | 5.0 | 7.5 | 18.5 | M6 | 1.5 |
| 33 | 38.0 | 55.0 | 42.0 | 48.0 | 3.0 | 49.2 | 55.0 | 59.0 | 79.0 | 20.0 | 56.0 | 28.0 | 2.0 | 5.0 | 9.0 | 19.5 | 11.5 | 8.5 | 12.0 | 10.5 | 1.5 | 5.0 | 7.5 | 18.5 | M6 | 1.5 |
| 35 | 40.0 | 57.0 | 44.0 | 50.0 | 3.0 | 52.2 | 58.0 | 61.0 | 80.0 | 20.0 | 57.0 | 28.5 | 2.0 | 5.0 | 9.0 | 19.5 | 11.5 | 8.5 | 12.0 | 11.0 | 1.5 | 5.0 | 7.5 | 19.0 | M6 | 1.5 |
| 38 | 43.0 | 60.0 | 49.0 | 56.0 | 4.0 | 53.3 | 62.0 | 65.0 | 85.0 | 23.0 | 57.0 | 28.5 | 2.0 | 6.0 | 9.0 | 22.0 | 14.0 | 10.0 | 11.3 | 10.3 | 2.0 | 6.0 | 9.0 | 19.0 | M6 | 1.5 |
| 40 | 45.0 | 62.0 | 51.0 | 58.0 | 4.0 | 55.3 | 64.0 | 66.0 | 85.0 | 23.0 | 57.0 | 28.5 | 2.0 | 6.0 | 9.0 | 22.0 | 14.0 | 10.0 | 11.8 | 10.8 | 2.0 | 6.0 | 9.0 | 19.0 | M6 | 1.5 |
| 43 | 48.0 | 65.0 | 54.0 | 61.0 | 4.0 | 59.7 | 68.4 | 69.0 | 85.0 | 23.0 | 57.0 | 28.5 | 2.0 | 6.0 | 9.0 | 22.0 | 14.0 | 10.0 | 13.2 | 12.0 | 2.0 | 6.0 | 9.0 | 19.0 | M6 | 2.5 |
| 45 | 50.0 | 67.0 | 56.0 | 63.0 | 4.0 | 60.8 | 69.3 | 71.0 | 84.0 | 23.0 | 56.0 | 28.0 | 2.0 | 6.0 | 9.0 | 22.0 | 14.0 | 10.0 | 12.8 | 11.6 | 2.0 | 6.0 | 9.0 | 19.5 | M6 | 2.5 |
| 48 | 53.0 | 70.0 | 59.0 | 66.0 | 4.0 | 63.8 | 72.3 | 75.0 | 84.0 | 23.0 | 56.0 | 28.0 | 2.0 | 6.0 | 9.0 | 22.0 | 14.0 | 10.0 | 12.8 | 11.6 | 2.0 | 6.0 | 9.0 | 19.5 | M6 | 2.5 |
| 50 | 55.0 | 72.0 | 62.0 | 70.0 | 4.0 | 66.5 | 75.4 | 76.0 | 93.0 | 25.0 | 63.0 | 31.5 | 2.5 | 6.0 | 9.0 | 23.0 | 15.0 | 10.5 | 12.8 | 11.6 | 2.0 | 6.0 | 9.5 | 19.5 | M6 | 2.5 |
| 53 | 58.0 | 79.0 | 65.0 | 73.0 | 4.0 | 69.5 | 78.4 | 83.0 | 97.0 | 25.0 | 67.0 | 33.5 | 2.5 | 6.0 | 9.0 | 23.0 | 15.0 | 12.0 | 13.5 | 12.3 | 2.0 | 6.0 | 11.0 | 23.5 | M8 | 2.5 |
| 55 | 60.0 | 81.0 | 67.0 | 75.0 | 4.0 | 71.5 | 80.4 | 85.0 | 97.0 | 25.0 | 67.0 | 33.5 | 2.5 | 6.0 | 9.0 | 23.0 | 15.0 | 12.0 | 14.5 | 13.3 | 2.0 | 6.0 | 11.0 | 23.5 | M8 | 2.5 |
| 58 | 63.0 | 84.0 | 70.0 | 78.0 | 4.0 | 74.5 | 83.4 | 88.0 | 104.0 | 25.0 | 74.0 | 37.0 | 2.5 | 6.0 | 9.0 | 23.0 | 15.0 | 12.0 | 14.5 | 13.3 | 2.0 | 6.0 | 11.0 | 24.5 | M8 | 2.5 |
| 60 | 65.0 | 86.0 | 72.0 | 80.0 | 4.0 | 76.5 | 85.4 | 95.0 | 104.0 | 25.0 | 74.0 | 37.0 | 2.5 | 6.0 | 9.0 | 23.0 | 15.0 | 12.0 | 14.5 | 13.3 | 2.0 | 6.0 | 11.0 | 24.5 | M8 | 2.5 |
| 63 | 68.0 | 89.0 | 75.0 | 83.0 | 4.0 | 82.7 | 91.5 | 93.0 | 109.0 | 25.0 | 79.0 | 39.5 | 2.5 | 6.0 | 9.0 | 23.0 | 15.0 | 12.0 | 14.2 | 13.3 | 2.0 | 6.0 | 11.0 | 24.5 | M8 | 2.5 |
| 65 | 70.0 | 91.0 | 77.0 | 85.0 | 4.0 | 83.0 | 92.0 | 95.0 | 98.0 | 25.0 | 68.0 | 34.0 | 2.5 | 6.0 | 9.0 | 23.0 | 15.0 | 12.0 | 14.2 | 13.0 | 2.0 | 6.0 | 11.0 | 23.5 | M8 | 2.5 |
| 70 | 75.0 | 99.0 | 83.0 | 92.0 | 4.0 | 90.2 | 99.0 | 105.0 | 112.5 | 28.0 | 76.4 | 38.2 | 2.5 | 7.0 | 9.0 | 26.0 | 18.0 | 12.5 | 14.9 | 13.7 | 2.0 | 6.0 | 11.3 | 25.5 | M8 | 2.5 |
| 75 | 80.0 | 104.0 | 88.0 | 97.0 | 4.0 | 95.2 | 104.0 | 109.0 | 112.5 | 28.0 | 76.4 | 38.2 | 2.5 | 7.0 | 9.0 | 26.0 | 18.0 | 12.5 | 14.2 | 13.0 | 2.0 | 6.0 | 11.3 | 25.5 | M8 | 2.5 |
| 80 | 85.0 | 109.0 | 95.0 | 105.0 | 4.0 | 100.2 | 109.0 | 114.0 | 112.5 | 28.0 | 76.0 | 38.0 | 3.0 | 7.0 | 9.0 | 26.2 | 18.2 | 12.5 | 15.2 | 14.0 | 2.0 | 6.0 | 11.3 | 25.0 | M8 | 2.5 |
| 85 | 90.0 | 114.0 | 100.0 | 110.0 | 4.0 | 105.2 | 114.0 | 119.0 | 112.5 | 28.0 | 76.0 | 38.0 | 3.0 | 7.0 | 9.0 | 26.2 | 18.2 | 13.0 | 16.2 | 15.0 | 2.0 | 6.0 | 12.0 | 25.5 | M8 | 2.5 |
| 90 | 95.0 | 119.0 | 105.0 | 115.0 | 4.0 | 111.6 | 120.3 | 124.0 | 112.5 | 28.0 | 76.0 | 38.0 | 3.0 | 7.0 | 9.0 | 26.2 | 18.2 | 15.0 | 16.0 | 14.8 | 2.0 | 6.0 | 14.0 | 25.0 | M8 | 2.5 |
| 95 | 100.0 | 124.0 | 110.0 | 120.0 | 4.0 | 114.5 | 123.3 | 129.0 | 110.5 | 28.0 | 76.0 | 38.0 | 3.0 | 7.0 | 9.0 | 25.2 | 17.2 | 15.0 | 16.0 | 14.8 | 2.0 | 6.0 | 14.0 | 25.0 | M8 | 2.5 |
| 100 | 105.0 | 129.0 | 115.0 | 125.0 | 4.0 | - | - | 134.0 | 110.5 | 28.0 | 76.0 | 38.0 | 3.0 | 7.0 | 9.0 | 25.2 | 17.2 | 15.0 | 17.0 | 15.8 | - | - | 14.0 | 25.5 | M8 | 2.5 |
| 105 | 115.0 | 148.0 | 122.2 | 134.3 | 5.0 | - | - | 153.0 | 122.0 | 32.0 | 82.0 | 41.0 | 2.0 | 10.0 | - | 30.0 | 20.0 | 15.0 | 17.0 | 15.8 | - | - | 14.0 | 31.5 | M8 | 2.5 |
| 110 | 120.0 | 153.0 | 128.2 | 140.3 | 5.0 | - | - | 158.0 | 122.0 | 32.0 | 82.0 | 41.0 | 2.0 | 10.0 | - | 30.0 | 20.0 | - | - | - | - | - | - | 31.5 | M8 | - |
| 115 | 125.0 | 158.0 | 136.2 | 148.3 | 5.0 | - | - | 163.0 | 122.0 | 32.0 | 82.0 | 41.0 | 2.0 | 10.0 | - | 30.0 | 20.0 | - | - | - | - | - | - | 31.5 | M8 | - |
| 120 | 130.0 | 163.0 | 138.2 | 150.3 | 5.0 | - | - | 168.0 | 122.0 | 32.0 | 82.0 | 41.0 | 2.0 | 10.0 | - | 30.0 | 20.0 | - | - | - | - | - | - | 31.5 | M8 | - |
| 125 | 135.0 | 168.0 | 142.2 | 154.3 | 5.0 | - | - | 173.0 | 122.0 | 32.0 | 82.0 | 41.0 | 2.0 | 10.0 | - | 30.0 | 20.0 | - | - | - | - | - | - | 31.5 | M8 | - |
| 130 | 140.0 | 173.0 | 146.2 | 158.3 | 5.0 | - | - | 178.0 | 122.0 | 32.0 | 82.0 | 41.0 | 2.0 | 10.0 | - | 30.0 | 20.0 | - | - | - | - | - | - | 31.5 | M8 | - |
| 135 | 145.0 | 178.0 | 152.2 | 164.3 | 5.0 | - | - | 183.0 | 122.0 | 32.0 | 82.0 | 41.0 | 2.0 | 10.0 | - | 30.0 | 20.0 | - | - | - | - | - | - | 31.5 | M8 | - |
| 140 | 150.0 | 183.0 | 156.2 | 168.3 | 5.0 | - | - | 188.0 | 122.0 | 32.0 | 82.0 | 41.0 | 2.0 | 10.0 | - | 30.0 | 20.0 | - | - | - | - | - | - | 31.5 | M8 | - |
| 145 | 155.0 | 191.0 | 161.2 | 173.3 | 5.0 | - | - | 196.0 | 133.0 | 34.0 | 93.0 | 46.5 | 2.0 | 10.0 | - | 30.0 | 20.0 | - | - | - | - | - | - | 35.5 | M8 | - |
| 150 | 160.0 | 196.0 | 168.2 | 180.3 | 5.0 | - | - | 201.0 | 137.0 | 36.0 | 93.0 | 46.5 | 2.0 | 10.0 | - | 32.0 | 22.0 | - | - | - | - | - | - | 35.5 | M8 | - |
| 155 | 165.0 | 201.0 | 173.2 | 185.3 | 5.0 | - | - | 206.0 | 141.0 | 38.0 | 93.0 | 46.5 | 2.0 | 12.0 | - | 34.0 | 24.0 | - | - | - | - | - | - | 35.5 | M8 | - |
| 160 | 170.0 | 206.0 | 178.2 | 190.3 | 5.0 | - | - | 211.0 | 141.0 | 38.0 | 93.0 | 46.5 | 2.0 | 12.0 | - | 34.0 | 24.0 | - | - | - | - | - | - | 35.5 | M8 | - |
| 165 | 175.0 | 211.0 | 183.2 | 195.3 | 5.0 | - | - | 216.0 | 141.0 | 38.0 | 93.0 | 46.5 | 2.0 | 12.0 | - | 34.0 | 24.0 | - | - | - | - | - | - | 35.5 | M8 | - |
| 170 | 180.0 | 216.0 | 188.2 | 200.3 | 5.0 | - | - | 221.0 | 141.0 | 38.0 | 93.0 | 46.5 | 2.0 | 12.0 | - | 34.0 | 24.0 | - | - | - | - | - | - | 35.5 | M8 | - |
| 175 | 185.0 | 221.0 | 193.2 | 205.3 | 5.0 | - | - | 226.0 | 141.0 | 38.0 | 93.0 | 46.5 | 2.0 | 12.0 | - | 34.0 | 24.0 | - | - | - | - | - | - | 35.5 | M8 | - |
| 180 | 190.0 | 226.0 | 207.5 | 219.3 | 5.0 | - | - | 231.0 | 149.0 | 42.0 | 93.0 | 46.5 | 2.0 | 12.0 | - | 38.0 | 28.0 | - | - | - | - | - | - | 35.5 | M8 | - |
| 185 | 195.0 | 231.0 | 212.5 | 224.3 | 5.0 | - | - | 236.0 | 149.0 | 42.0 | 93.0 | 46.5 | 2.0 | 12.0 | - | 38.0 | 28.0 | - | - | - | - | - | - | 35.5 | M8 | - |
| 190 | 200.0 | 236.0 | 217.5 | 229.3 | 5.0 | - | - | 241.0 | 149.0 | 42.0 | 93.0 | 46.5 | 2.0 | 12.0 | - | 38.0 | 28.0 | - | - | - | - | - | - | 35.5 | M8 | - |
| 195 | 205.0 | 245.0 | 222.5 | 234.3 | 5.0 | - | - | 250.0 | 151.0 | 43.0 | 95.0 | 47.5 | 2.0 | 12.0 | - | 38.0 | 28.0 | - | - | - | - | - | - | - | M10 | - |
| 200 | 210.0 | 250.0 | 227.5 | 239.3 | 5.0 | - | - | 255.0 | 151.0 | 43.0 | 95.0 | 47.5 | 2.0 | 12.0 | - | 38.0 | 28.0 | - | - | - | - | - | - | M10 | - |
We have large stock, so our delivery is very fast.
For example,if products are standarded, the delivery time is one week.
Our company and factory addrss: Ningbo City, Zhejiang Province,China.
Our city has a large port and an airport, so its transportation is very convenient.
Question1: What are the prices of your products?
Answer: For each model, the unit price is listed on the website, but what is displayed on the website is only the average market price. For specific models, you can contact us for further consultation and negotiation.
Question 2: Are you a factory or a trade company?
Answer: We are a factory with top sales for the trade service.
Question 3: What is the minimum order quantity for each order?
Answer: For products of regular models, the minimum order quantity is at least five. We welcome you to test the quality of our products and services through placing trial orders. Looking forward to the long-term cooperation with you.
Question4: What is your company's service tenet?
Answer: Quality first, service upmost. We promises that if there is any problem with the quality of the product, or if the product is damaged during the transportation, our company will be responsible for compensation, regardless of the ordder turnover value.
Question5: Can I try to get a SAMPLE before the order?
Answer: Sure. Our company will provide you with samples for free, but you will have to pay for the international delivery (freight collect payment).
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