Mechanical Data; Torque Values; Housing Materials - Grundfos DMX 221 Installations- Und Bedienungsanleitung

9.3 Mechanical data

9.3.1 Torque values

Torque values for the dosing head screws
Use a torque wrench with an accuracy of ± 4% to tighten the screws.
Pump type
DMX 4-10
DMX 7-10
DMX 9-10
DMX 12-10
DMX 17-4
DMX 25-3
DMX 7.2-16
DMX 8-10
DMX 14-10
DMX 18-10
DMX 26-10
DMX 39-4
DMX 60-3
DMX 13.7-16
DMX 16-10
DMX 16-12
DMX 27-10
DMX 27-12
DMX 35-10
DMX 50-10
DMX 75-4
DMX 115-3
Torque values for the screws of the integral relief valve
Use a torque wrench with an accuracy of ± 4% to tighten the screws.
Pump type
DMX with integral relief valve

9.3.2 Housing materials

Pump
Upper part of pump housing
Lower part of pump housing
Stroke-length adjusting knob
AR control unit
Upper part of AR housing
Lower part of AR housing
Torque
[Nm]
6-8
6-8
6-8
6-8
5-6
5-6
6-8
6-8
6-8
6-8
6-8
5-6
5-6
6-8
6-8
6-8
6-8
6-8
6-8
6-8
5-6
5-6
Material
PPE + PA, glass-fibre reinforced
PP, glass-fibre reinforced
ABS
Material
PPE + PS, glass-fibre reinforced
Aluminium
DMX 221 | | 39
Torque
[Nm]
3-4