Data Sheet

YD and YS Valves
D100031X012
Product Bulletin
51.1:YD
June 2014
5
Figure 2. Construction Details - NPS 8 YD-High Temperature
B1504-6
E1433
UPPER CAGE
GASKETS
VALVE BODY
LOWER CAGE
PLUG
Figure 3. Construction Details - NPS 8 YD
58B1505-A
STEM
UPPER
CAGE
LOWER
CAGE
ADAPTOR
FLANGE
PLUG
CAGE
ADAPTOR
BONNET
Flow Directions
YD(CommonPortonBottom)seefigure6
 Plug Down, Left-Hand Port Closed--Flow in
converging service is from right to bottom port and
in diverging service is from bottom to right port.
 Plug Up, Right-Hand Port Closed--Flow in
converging service is from left to bottom port and
in diverging service is from bottom to left port.
 Intermediate Plug Positions--Flow in converging
service is from both left and right ports to bottom
port, with capacities in proportion to plug travel.
Flow in diverging service is from bottom port to
both left and right ports, with capacities split in
proportion to plug travel.
YS (Common Port on Left) seefigure6
 Plug Down, Bottom Port C losed--Flow in converging
service is from right to left port and i n diverging
service is from left to right port.