Models 103 - 107 do not have in-built lock valves. When used in dual stations they require the use of lock valves to prevent counter-rotation. Should feed-back be required on one or both stations, one of the manual or electric locking options should be used. (See section on feedback options).
Model 106 - 107 These helms are supplied with 1” parallel shafts and fittings to suit 5/8” diameter copper tubing only.
