| Customization: | Available |
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| Structure: | Single End |
| Pressure: | High Pressure Mechanical Seals |
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(1)Features
• For stepped shafts
• Rotating spring
• Single or double seal available
• Balanced
• 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
(2)Advantages
• Contact-free operation, no friction
• No differential pressure required with hard/soft material combination
• Applicable as containment seal acc. to API 682
(3)Operating range (see note on page 1)
Shaft diameter: d1 = 28 ... 125 mm (1.10" ... 4.92")
Pressure: p1 = 25 bar (363 PSI)
Temperature: t* = -20 °C ... +170 °C (-4 °F ... +338 °F)
Sliding velocity: vg = 4 ... 25 m/s (13 ... 82 ft/s)
* Depending on resistance of O-Rings
(4)Materials
Seal face: Carbon graphite antimony impregnated (A),
Silicon carbide (Q2),
alternatively: Carbon graphite resin impregnated (B),
Silicon carbide (Q1)
Seat: Silicon carbide (Q1, Q2),
Silicon carbide (Q19, Q29) with seal face in Q1 resp. Q2
Metal parts: CrNiMo steel (G)
(5)Standards and approvals
• EN 12756
• API 682/ISO 21049
(6)Recommended applications
• Chemical industry
• Refining technology
• Gases and liquids (single seals only gas)
• Gases and liquids which must not get into the atmosphere (dual seal)
• Gases not harmful to the enivronment (single seal)
• Fans
• Small steam turbines
• Blowers
• Roots compressors
• Pumps
(7)Item Part no. to DIN 24250 Description
1.1 472 Sliding face
1.2 412.1 O-Ring
1.3 474 Thrust ring
1.4 485 Drive collar
1.5 477 Spring
1.6 904 Set screw
2 475.1 Seat
3 412.3 O-Ring
(8)Product variants
CGSH-KD
Double seal back-to-back, buffered with gas, according to API 682 configuration 3NC-BB, Plan 74.
Items, descriptions and unspecified dimensions as for CGSH-K.
Pressure: p1 = ... 22 bar (319 PSI),
p3 = ... 25 bar (363 PSI)
(over the whole nominal diameter range, higher values on request).
Differential pressure Δp = min. 3 bar (44 PSI)
Other operating limits as CGSH-K.
Tandem arrangement acc. to API 682 3rd Edition
Configuration: 2CW-CS, Plan 72, 75, 76.
For media with a gaseous leakage. H75VN on the product
side. In case of a failure, the CGSH on the atmosphere side, works as a liquid seal.
Dimensions in mm
| d1 | d2 | d3 | d6 | d7 | l1k | L1' | L2 | L4' | L5 | L6 | L7 | f | mx |
| 28* | 33.0 | 53.0 | 37.0 | 43.0 | 50.0 | 89.0 | 20.0 | 44.5 | 2.0 | 5.0 | 9.0 | 5.0 | M6 |
| 30* | 35.0 | 55.0 | 39.0 | 45.0 | 50.0 | 89.0 | 20.0 | 44.5 | 2.0 | 5.0 | 9.0 | 5.0 | M6 |
| 32* | 38.0 | 60.0 | 42.0 | 48.0 | 50.0 | 89.0 | 20.0 | 44.5 | 2.0 | 5.0 | 9.0 | 5.0 | M6 |
| 33* | 38.0 | 60.0 | 42.0 | 48.0 | 50.0 | 89.0 | 20.0 | 44.5 | 2.0 | 5.0 | 9.0 | 5.0 | M6 |
| 35* | 40.0 | 62.0 | 44.0 | 50.0 | 50.0 | 89.0 | 20.0 | 44.5 | 2.0 | 5.0 | 9.0 | 5.0 | M6 |
| 38* | 43.0 | 65.0 | 49.0 | 56.0 | 52.5 | 95.0 | 23.0 | 47.5 | 2.0 | 6.0 | 9.0 | 5.0 | M6 |
| 40* | 45.0 | 67.0 | 51.0 | 58.0 | 52.5 | 95.0 | 23.0 | 47.5 | 2.0 | 6.0 | 9.0 | 5.0 | M6 |
| 43* | 48.0 | 70.0 | 54.0 | 61.0 | 52.5 | 95.0 | 23.0 | 47.5 | 2.0 | 6.0 | 9.0 | 5.0 | M6 |
| 45* | 50.0 | 72.0 | 56.0 | 63.0 | 52.5 | 95.0 | 23.0 | 47.5 | 2.0 | 6.0 | 9.0 | 5.0 | M6 |
| 48* | 53.0 | 75.0 | 59.0 | 66.0 | 52.5 | 95.0 | 23.0 | 47.5 | 2.0 | 6.0 | 9.0 | 5.0 | M6 |
| 50* | 55.0 | 77.0 | 62.0 | 70.0 | 57.5 | 104.0 | 25.0 | 52.0 | 2.5 | 6.0 | 9.0 | 5.0 | M6 |
| 53* | 58.0 | 84.0 | 65.0 | 73.0 | 57.5 | 104.0 | 25.0 | 52.0 | 2.5 | 6.0 | 9.0 | 5.0 | M6 |
| 55* | 60.0 | 86.0 | 67.0 | 75.0 | 57.5 | 106.0 | 25.0 | 53.0 | 2.5 | 6.0 | 9.0 | 5.0 | M6 |
| 58* | 63.0 | 89.0 | 70.0 | 78.0 | 62.5 | 112.0 | 25.0 | 56.0 | 2.5 | 6.0 | 9.0 | 7.0 | M8 |
| 60* | 65.0 | 91.0 | 72.0 | 80.0 | 62.5 | 112.0 | 25.0 | 56.0 | 2.5 | 6.0 | 9.0 | 7.0 | M8 |
| 63* | 68.0 | 94.0 | 75.0 | 83.0 | 62.5 | 112.0 | 25.0 | 56.0 | 2.5 | 6.0 | 9.0 | 7.0 | M8 |
| 65* | 70.0 | 97.0 | 77.0 | 85.0 | 62.5 | 112.0 | 25.0 | 56.0 | 2.5 | 6.0 | 9.0 | 7.0 | M8 |
| 70* | 75.0 | 104.0 | 83.0 | 92.0 | 70.0 | 126.0 | 28.0 | 63.0 | 2.5 | 7.0 | 9.0 | 7.0 | M8 |
| 75* | 80.0 | 109.0 | 88.0 | 97.0 | 70.0 | 126.0 | 28.0 | 63.0 | 2.5 | 7.0 | 9.0 | 7.0 | M8 |
| 80* | 85.0 | 114.0 | 95.0 | 105.0 | 70.0 | 126.0 | 28.0 | 63.0 | 3.0 | 7.0 | 9.0 | 7.0 | M8 |
| 85* | 90.0 | 119.0 | 100.0 | 110.0 | 75.0 | 126.0 | 28.0 | 63.0 | 3.0 | 7.0 | 9.0 | 7.0 | M8 |
| 90* | 95.0 | 124.0 | 105.0 | 115.0 | 75.0 | 126.0 | 28.0 | 63.0 | 3.0 | 7.0 | 9.0 | 7.0 | M8 |
| 95* | 100.0 | 129.0 | 110.0 | 120.0 | 75.0 | 126.0 | 28.0 | 63.0 | 3.0 | 7.0 | 9.0 | 7.0 | M8 |
| 100* | 105.0 | 132.0 | 115.0 | 125.0 | 75.0 | 126.0 | 28.0 | 63.0 | 3.0 | 7.0 | 9.0 | 7.0 | M8 |
| 105* | 115.0 | 153.0 | 122.2 | 134.3 | 73.0 | 136.0 | 32.0 | 68.0 | 2.0 | 10.0 | - | 7.0 | M8 |
| 110* | 120.0 | 158.0 | 128.2 | 140.3 | 73.0 | 136.0 | 32.0 | 68.0 | 2.0 | 10.0 | - | 7.0 | M8 |
| 115* | 125.0 | 163.0 | 136.2 | 148.3 | 73.0 | 136.0 | 32.0 | 68.0 | 2.0 | 10.0 | - | 7.0 | M8 |
| 120* | 130.0 | 168.0 | 138.2 | 150.3 | 73.0 | 136.0 | 32.0 | 68.0 | 2.0 | 10.0 | - | 7.0 | M8 |
| 125* | 135.0 | 173.0 | 142.2 | 154.3 | 73.0 | 136.0 | 32.0 | 68.0 | 2.0 | 10.0 | - | 7.0 | M8 |
| *EN 12756 | |||||||||||||
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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