CLICK HERE ← Back to Mechanical Seal Types.
Type 6A mechanical seal
Type 6A seals (also known as Type 68 or Type B03) are generally used for lower pressure water transfer pumps and some irrigation pumps. They are a slightly different type of pusher seal. The main differences with a Type 6A seal is that it doesn’t use an o-ring seal around the pump shaft to hold in the water pressure. The stationary section actually holds both the wear face (normally carbon graphite but can be silicone carbide) and the spring base. This sat in a moulded rubber seal base in the pump housing. The rotary section is actually made from ceramic (and sometimes silicone carbide) and sat in a moulded rubber base which is set into a normally brass recess at the back of the impellor. While they can handle dirty and contaminated water the main downside to a Type 6A seal is that its only rated for 300kpa. Type 6A seals are available in limited imperial sizes and also a small range of metric sizes, we have Type 6A seals IN STOCK HERE in our webshop.
| Type 6A, Type 68, Type B03 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dimensions (mm) | |||||||||||
| RP Part No | Face and Rubber | In Stock | Equivalent to | d | d2 | d3 | d7 | L | L4 | L2 | L3 |
| PSST6A-1/2CCN | CCN | YES | Davey 30736 | 12.7 | 28.57 | 32.0 | 25.4 | 19.2 | 8 | 5 | 8 |
| PSST6A-5/8CCN | CCN | YES | Davey 47863 | 15.875 | 36.5 | 41.0 | 31.75 | 25 | 10.3 | 6.7 | 8 |
| PSST6A-5/8-3/4CCN | CCN | YES | Davey SB16SP | 15.875 | 36.5 | 41.0 | 34.925 | 25 | 10.3 | 6.7 | 8 |
| PSST6A-3/4xxx | CCN/CCV/SIC | Order in | – | 19.05 | 40 | 34.925 | 25.8 | 10.3 | 5.5 | 10 | |
| PSST6A-20CCN | CCN | YES | Davey 49381SP | 20 | – | 45 | 35 | 22.5 | 5 | 6 | 11.5 |
| PSST6A-1xxx | CCN/CCV/SIC | Order in | – | 25.4 | 47 | 41.275 | 29 | 11.1 | 5.9 | 12 | |
| PSST6A-11/8xxx | CCN/CCV/SIC | Order in | – | 28.57 | 52 | 48 | 27 | 8 | 8 | 12 | |
| PSST6A-25xxx | CCN/CCV/SIC | Order in | – | 25 | 46 | 44 | 25 | 7 | 8 | 10 | |
| PSST6A-30xxx | CCN/CCV/SIC | Order in | – | 30 | 58 | 48 | 29 | 8 | 8 | 13.3 | |
| CCN = Carbon, Ceramic, Nitrile | CCV = Carbon, Silicon, Viton | SIC = Silicon Carbide, Silicon Carbide, Viton | |||||||||||
Operating Limits: Temperature: -30°~150°C | Pressure: ≤0.3 MPa | Speed: ≤5000 rpm
Please contact us if you are looking for something unusual or use our pump selector in our webshop to get a replacement seal for your pump.