MKS 253B-2-2-2 - Page 50

Model Code A
pp
endix B: Model Code Ex
p
lanation
42
Type 253 with KF or NW ISO Flanges
Type
Number
Nominal Inside
Diameter
inches (mm)
ISO Flange
Size
Flapper
O-Ring
253B-20-40-1* 0.779 (20) KF-40 Yes
253B-20-40-2* 0.779 (20) KF-40 No
253B-1-40-1* 1.270 (32) KF-40 Yes
253B-1-40-2* 1.270 (32) KF-40 No
253B-2-50-1* 1.888 (48) KF-50 Yes
253B-2-50-2* 2.000 (51) KF-50 No
253B-60-63-1 2.362 (60) NW-63 Yes
253B-60-63-2 2.362 (60) NW-63 No
253B-3-80-2 3.000 (76) NW-80 No
253B-4-100-2 3.875 (98) NW-100 No
253B-6-160-2 5.750 (146) NW-160 No
253B-8-200-2 7.650 (194) NW-200 No
253B-10-250-2 9.700 (246) NW-250 No
* Available with optional heater; consult factory for more information.