costs from $250
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Stopcocks, Valves
Here you find stopcocks and valves in several forms and with diverse characteristics: We offer e. g. clearance valves or one-way-valves as well as high vacuum or PTFE valves. Due to their fine thread, high vacuum valves are suitable for exact dosing. PTFE valves enable greaseless analyses. Stopcocks have several outflows: one-way, two-way or three-way and are also available with hose connectors. We stock products of numerous renowned manufacturers, e.g. stopcocks made of PTFE by Bohlender or made of borosilicate glass by Duran.
BOLA by Bohlender offers a large assortment of stopcocks for various needs. BOLA 2-way and 3-way stopcocks made of PTFE are ideal for distributing liquids or gases and enable a quick and easy disconnection of flow. Temperature resistance from -200°C to +250°C, chemical resistance: +++ universal, pressure: 2 bar.
BOLA Stopcocks with Hose Connectors
We offer 2-way stopcocks with straight bore and two hose connectors or 3-way stopcocks with T-shaped bore and three hose connectors for connecting elastic tubing (e.g. Viton®, Tygon®, silicone). Conical stopcock plug, tightness is increased by turning the nut on the lower side. 3-way stopcock plug with T-shaped mark of flow direction. Universal chemical resistance, the flowing product is only exposed to PTFE.
| Type |
Bore shape stopcock |
Bore dia. |
For tubing I.D. |
O.D. of connectors |
Outer dimensions |
Cat.-No. |
| 2-Ways | I | 1,5 | 4 | 4,5 | 60 x 22 x 53 | BLE65003 |
| 2-Ways | I | 3,0 | 6 | 6,8 | 60 x 22 x 53 | BLE65006 |
| 2-Ways | I | 4,0 | 8 | 9,0 | 60 x 22 x 53 | BLE65009 |
| 2-Ways | I | 6,0 | 10 | 11,0 | 85 x 35 x 69 | BLE65012 |
| 3-Ways | T | 1,0 | 4 | 4,5 | 60 x 41 x 53 | BLE65050 |
| 3-Ways | T | 2,0 | 6 | 6,8 | 60 x 41 x 53 | BLE65053 |
| 3-Ways | T | 3,0 | 8 | 9,0 | 60 x 41 x 53 | BLE65056 |
| 3-Ways | T | 4,0 | 10 | 11,0 | 85 x 60 x 69 | BLE65059 |
2-Way Stopcocks and 3-Way-Stopcocks
2-way stopcocks with straight bore and two connections or 3-way stopcocks with T-shaped bore and three connections, with nuts made of glass-fibre reinforced PTFE for connecting tubing or tube are available. Conical stopcock plug, tightness is increased by turning the nut on the lower side. 3-way stopcock plug with T-shaped mark of flow direction. Universal chemical resistance, the flowing product is only exposed to PTFE.
| Type |
Bore shape stopcock |
Bore dia. |
For tubing O.D. mm |
Thread |
Outer dimensions |
Cat.-No. |
| 2-Ways | I | 2 | 4 | 14 x 2 | 59 x 22 x 53 | BLE65202 |
| 2-Ways | I | 2 | 6 | 14 x 2 | 59 x 22 x 53 | BLE65204 |
| 2-Ways | I | 5 | 8 | 18 x 2 | 74 x 35 x 69 | BLE65206 |
| 2-Ways | I | 5 | 10 | 18 x 2 | 74 x 35 x 69 | BLE65208 |
| 3-Ways | T | 1,5 | 4 | 14 x 2 | 59 x 41 x 53 | BLE65402 |
| 3-Ways | T | 1,5 | 6 | 14 x 2 | 59 x 41 x 53 | BLE65404 |
| 3-Ways | T | 3,5 | 8 | 18 x 2 | 74 x 54 x 69 | BLE65406 |
| 3-Ways | T | 3,5 | 10 | 18 x 2 | 74 x 54 x 69 | BLE65408 |
Duran Stopcocks & Valves
The manufacturer Duran is well-known for high quality lab supply made of borosilicate glass. This extraordinary robust and temperature resistant material is a relevant alternative in the manufacturing of stopcocks. Duran's stopcock range stands out thanks to high manufacturing accuracy and very good ground joint quality. This ensures you have highly effective sealing and interchangeability. For use at higher temperatures stopcocks with glass key are preferable. Stopcocks with PTFE keys enable grease-free working. Alongside standard stopcocks, Duran also offers high-vacuum adapted PRODURAN® valves.