High-Quality SRS-E21 Metal Below Seals for Industrial Use
Zhangjiagangshi Siriseal Mechanical Seal Co., Ltd.
Jiangsu, China
Last Login Date:
Aug 01, 2025
Main Products:
Mechanical Seals, Pump Seals, Bellow Seals, Component Seals, Cartridge Seals, Agitator Seals, Oil Seal, Silicon Seal, Water Seal
Product Description
Company Info
Basic Info.
Product Description
Suggested operating limits
Temperature: -20 - 120ºC
Speed: ≤15m/s
Pressure: ≤1.0Mpa
Combined material
Rotary face: Carbon/Sic/TC
Stat Ring: Ceramic/Sic/TC
Seat Type: Standard SRS-S11, Alternative SRS-S20/S21.
Features
The drive band's "dent and groove" design eliminates overstressing of the elastomer bellows to prevent bellows slip and protect the shaft and sleeve from wear.
Non-clogging, single-coil spring provides greater dependability than multiple spring designs and will not foul due to fluid contact.
Flexible elastomer bellows automatically compensates for abnormal shaft-end play, run-out, primary ring wear and equipment tolerances.
The Type 21 is ideal for use in centrifugal, rotary and turbine pumps, compressors, chillers and other rotary shaft equipment. It is also commonly used by the waste water and water systems industries for applications such as waste treatment, potable water and HVAC.
Also we could manufacture seals according to your drawing, and design as your request.
| SIZE/INCH | d | D3 | D31 | D6 | D7 | L3 | L4 |
| 0.500 | 12.7 | 24.0 | 22.8 | 19.05 | 25.40 | 20.62 | 7.95 |
| 0.625 | 15.8 | 26.7 | 26.7 | 23.80 | 31.75 | 22.23 | 10.31 |
| 0.750 | 19.0 | 31.2 | 30.4 | 26.97 | 34.93 | 22.23 | 10.31 |
| 0.875 | 22.2 | 33.6 | 33.4 | 30.15 | 38.10 | 23.80 | 10.31 |
| 1.000 | 25.4 | 43.2 | 39.3 | 33.32 | 41.28 | 25.40 | 11.10 |
| 1.125 | 28.5 | 46.5 | 42.0 | 36.50 | 44.45 | 26.97 | 11.10 |
| 1.250 | 31.7 | 49.5 | 45.8 | 39.70 | 47.63 | 26.97 | 11.10 |
| 1.375 | 34.9 | 52.7 | 49.3 | 42.85 | 50.80 | 28.58 | 11.10 |
| 1.500 | 38.1 | 56.0 | 52.8 | 46.05 | 53.98 | 28.58 | 11.10 |
| 1.625 | 41.2 | 62.2 | 55.5 | 50.80 | 60.33 | 34.93 | 12.70 |
| 1.750 | 44.4 | 66.0 | 61.0 | 53.97 | 63.50 | 34.93 | 12.70 |
| 1.875 | 47.6 | 66.0 | 64.0 | 57.15 | 66.68 | 38.10 | 12.70 |
| 2.000 | 50.8 | 73.0 | 66.0 | 60.33 | 69.85 | 38.10 | 12.70 |
| 2.125 | 53.9 | 73.5 | 71.5 | 60.33 | 76.20 | 42.85 | 14.27 |
| 2.250 | 57.1 | 79.6 | 79.6 | 61.90 | 79.38 | 42.85 | 14.27 |
| 2.375 | 60.3 | 82.0 | 79.6 | 65.10 | 82.55 | 46.05 | 14.27 |
| 2.500 | 63.5 | 85.0 | 81.5 | 68.25 | 85.73 | 46.05 | 14.27 |
| 2.625 | 66.6 | 88.5 | 84.6 | 71.42 | 85.73 | 49.20 | 15.88 |
| 2.750 | 69.8 | 92.7 | 90.0 | 74.60 | 88.90 | 49.20 | 15.88 |
| 3.000 | 76.2 | 102.0 | 96.8 | 80.95 | 98.43 | 52.37 | 15.88 |
