MKS 640B - Appendix D: Model Code Explanation; Model Code Description

Appendix D: Model Code Explanation Model Code Description
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Appendix D: Model Code Explanation
Model Code Description
The model code number of your 640B Series Pressure Controller describes features of the unit,
such as the pressure range, fittings, seal material, and orifice size (flow range).
Type Number
Pressure Range
Fittings
Z
XXX
Y64XB
Valve Type
Body Seal Material
QR
Valve Orifice
Trip Points
Valve Plug Material
S
T
Type Number (64XB)
The type number identifies your controller; either a 640B absolute pressure controller or 641B
gage pressure controller.