CLEARANCE PROBLEMS
Weight of the swivel block could cause it to "droop'' and catch on the valve arm. To avoid this problem, swivel block is pinned ("A'' on drawing) to the rod end at a 7° horizontal angle off the handle. If swivel block presents a clearance problem at either end of valve handle, loosen set screw "B'', slide connecting rod out of swivel, and rotate swivel as shown; then reassemble connecting rod.
B
A
SPRING-LOADED LINKAGES FOR 1124 VALVES
1124 Valves have beveled disc and spring-loaded linkage to accommodate electric operator over-travel after the disc closes.
The linkage consists of a spring and slotted sleeve arrangement within which the rod ends meet (the sleeve is inside the spring). Motor rod end and valve rod end are attached to the spring at points farthest from each of them. The spring is the only connection between them.
As motor closes, spring (resisting compression) pushes valve rod end ahead of it, pulling valve shut.
If motor continues pulling after valve's beveled disc reaches its closed position, spring is compressed against valve rod end; rod ends separate a bit (increasing effective length of linkage). When motor starts to open, spring relaxes until rod ends meet (within slotted sleeve) and motor rod end shoves valve rod end ahead of it, opening valve. Linkage adjustments are the same as for a standard setup except when starting with valve and operator in closed position, pull down on free end of connecting rod to compress spring about 1⁄8 " before tightening set screw to hold rod in valve swivel block. In using the above method, it makes no difference whether low or high rate setting is made first.
Groove pin
Spring
Sleeve
Hex nut
Rod valve end
Plain washer
Groove pin
Collar
Rod motor end
Instructions 1020 Page 4
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