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Stopcocks and Valves

BOLA Vario Couplings, PVDF
Cat.-No. D 681-...
Two-part coupling made of PVDF for connecting elastic tubing (e.g. Viton®, Tygon®, silicone) to hard-walled tubing made of PTFE, glass or other plastics. Easy and ingenious functioning: the elastic tubing is pushed on a cone and fixed on the coupling by means of a connecting nut. On the other side, the hard-walled tubing is connected as follows: Hard-walled tubing up to a maximum O.D. of 10 mm is connected to a GL thread by means of laboratory screw joints. Restricted chemical resistance, working temperatures up to max. +170°C.

BOLA Adapter for ProMinent Pump, PTFE
Cat.-No. D 730-...
Adaptor made of glass-fibre reinforced PTFE, transition from pump thread M20x1,5 to GL thread. Pressure resistant connection (max. 10 bar) of hard-walled tubing with Prominent® pumps by using BOLA Laboratory Screw Joints. Universal chemical resistance, the product is only exposed to PTFE.

BOLA GL Ball Valves, PTFE
Cat.-No. E 664-...
Two-way valve with straight bore and two connections with GL thread or three-way valve with L-shaped bore and three connections with GL thread. Ball-shaped stopcock plug for excellent tightness, free-moving stop valve. Suitable for pressure up to max. 12 bar, or for vacuum. Universal chemical resistance, the flowing product is only exposed to PTFE.

BOLA Pressure-Relief Valve with Manual Ventilation, PTFE Bestseller:
This product is very popular with our clients.
Cat.-No. E 683-...
Body made of PTFE with two connections with GL 18 thread, valve made of PPS with toggle for manual ventilation by pulling and adjusting screw with counternut for adjusting and fixing of requested pressure in a range between 0,1 and 10 bar (factory setting 1,5 bar). Universal chemical resistance, the flowing product is only exposed to PTFE.

BOLA GL 2-Way Stopcocks, PTFE Bestseller:
This product is very popular with our clients.
Cat.-No. E 684-...
Two-way stopcock with straight bore and two connections with GL thread or three-way stopcock with L-shaped or T-shaped bore and three connec-tions with GL thread. Cylindrical stopcock plug for good tightness, stop valve with mark of flow direction. Suitable for pressure up to max. 6 bar, or for vacuum. Universal chemical resistance, the flowing product is only exposed to PTFE.

BOLA Ground Joint-GL 2-Way Stopcocks, PTFE
Cat.-No. E 689-...
Ground joint 2-way-stopcock with straight bore and one connection with GL thread or ground joint 3-way-stopcock with T-shaped bore and two connections with GL thread. Cylindrical stopcock plug for good tightness, stop valve with mark of flow direction. Suitable for pressures up to max. 6 bar, or for vacuum. Universal chemical resistance, the flowing product is only exposed to PTFE.

BOLA GL Control Valves, PTFE
Cat.-No. E 694-...
Two-way valve with straight bore and two connections with GL thread completely made of PTFE. Motionless sealing without wearing parts due to integrated bellow. For best possible tightness even with considerable thermal fluctuations, the conical nipple of the bellow is prestressed by means of a spring. The valve can be opened and closed by turning the adjusting nut; a nipple on the top indicates the angle of opening. Suitable for pressure up to max. 6 bar, suitable for vacuum. Universal chemical resistance, the flowing product is only exposed to PTFE.

BOLA Vario Couplings, PVDF
Cat.-No. F 778-...
Two-part coupling made of PVDF for connecting elastic tubing (e.g. Viton®, Tygon®, silicone) to hard-walled tubing made of PTFE, glass or other plastics. Easy and ingenious functioning: the elastic tubing is pushed on a cone and fixed on the coupling by means of a connecting nut. On the other side, the hard-walled tubing is connected as follows: Flanged PTFE tubing with miniature connectors (e.g. Cat. No. F 702) is connected to a female thread UNF ¼”28 G.

BOLA Dirt trap, PTFE
Cat.-No. N 1674-...
With two GL 18 threads for connecting hard-walled tubing (PTFE, PFA, FEP) or tubes with BOLA Laboratory Screw Joints. Lateral connection with plug for easy exchange of filtering membrane (thickness 0,2-3,0 mm) and for cleaning. The flow direction is marked with an arrow. Completely made of PTFE, the flowing product is only exposed to PTFE.