P1.3
Inlet valve
Outlet valve
To assemble the sample gas pump, perform the steps in reverse order. When tightening the inlet and outlet valves be sure to ob-
serve the required tightening torque of max. 1 Nm.
CAUTION! Tightening the valves more will permanently deform the pump
body, requiring replacement.
When installing the screw connection, ensure the connection is tight.
6.4 Replacing the O-ring on the bypass valve (optional)
– Loosen the two screws on the valve plate and carefully remove the entire unit.
– Coat the new O-ring with suitable O-ring grease (e.g. Fluoronox S90/2) and install in the spindle.
– Carefully insert the entire unit into the pump body while turning and tighten screws.
6.5 Replacing parts inside the pump housing
First detach the screw-in connections as described in chapter „Conversion to pump body pointing down“.
Loosen the 4 Torx screws M4x18 (Tx20) and lift the pump head along with mounting ring and foam cover off the console.
21
Bühler Technologies GmbH
BE420023 ◦ 03/2020
