Collet Fittings
   Tough pumping conditions can cause reciprocation valve rods or pull tubes to break due to sideways pumping forces caused by downstroke friction or fast pumping speeds. The H-F collet fittings provide a longer length of support for the valve rod or pull tube which lessens the bending stress applied to the critical thread area of the rod or tube. They are available in high strength alloy steel or stainless steel.