MKS 253B-2-2-2 - Labels; Pump Label; Serial Number Label; Figure 6: Pump Label

Labels Cha
p
ter Two: Installation
28
Labels
There are two labels on the 253 valve; a pump label and a serial number label. The labels are
located on opposite sides of the driver/gear assembly (refer to Figures 1 to 5, pages 23 to 25).
Pump Label
The pump label, shown in Figure 6 indicates which side of the valve should be oriented towards the
high vacuum pump during installation.
Figure 6: Pump Label
Serial Number Label
The serial number label, shown in Figure 7, lists the serial number and the product model
number, and displays the CE mark signifying compliance with the European CE regulations.
Serial #:
Model #:
MKS Instruments, Inc. Made in theUSA
123456789
253B-2-2-1
Figure 7: Serial Number Label
Refer to
Appendix B: Model Code Explanation
, page 41, for more information.