SPRAY MACHINERY 129 



sliding agitator simply moves back and forth along the bottom 

 of the tank, while the propeller whirls around in the liquid, 

 keeping it churned up all the time. The propeller agitators 

 are much more efficient than any other type because of their 

 higher speed, durability, simplicity, and small size. 



Supply Tanks. — Supply tanks vary in shape and in size. 

 The most popular tank, however, is the round-bottom type. 

 This tank is easily kept tight by screwing up a few nuts on 

 the clamp rods. The principal trouble with all tanks is the 

 difficulty of keeping them water-tight, and when selecting one 

 see that there is an easy way of tightening it up so that it can 

 always be kept tight. A wooden tank is preferable to any 

 metal tank. 



Fig. 61. — Different types of spray nozzles. 1, three-cluster vermorel; 

 3, angle Cyclone; S, Bordeaux; 4, Whirlpool; 5, Vapo. 



Nozzles. — The nozzles used for spraying vary greatly, and 

 several distinct kinds are in use. The nozzle is often the 

 source of considerable trouble, and great care should be used 

 in selecting a good type. 



Some of the common types of nozzles are the Bordeaux, 

 Cyclone, Whirlpool, Vermorel, of which there is a one-, two-, 

 three-, and a four-cluster vermorel, the Vapo and several 

 others. The different kinds are used for special purposes and 

 no one general-purpose nozzle is very satisfactory. The vapo 

 nozzle is perhaps one of the most satisfactory types and it has 

 largely taken the place of the vermorel. A small, single vapo 

 nozzle has the capacity of a three-cluster vermorel. 

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