CREAMERY BUTTER MAKING 



195 



Packing. All steam stuffing boxes should be packed 

 with asbestos which has been treated with a mixture of 

 oil and graphite. 



Pig. 57. Adjustable alligator wrench. 



Pipe joints, such as unions, 

 should be fitted with rainbow gas- 

 kets to which a little graphite or 

 chalk is added to prevent their 

 sticking to the joints. Pipes that 

 must be frequently taken apart 

 should have ground joints. These 

 will do away with the use of 

 gaskets which are troublesome in 

 such cases. 



Steam Fittings. Extra fittings 

 for one-half to two inch pipes 

 should always be on hand. The 

 necessary fittings are elbows, nip- 

 ples, bushings, tees (Ts), plugs, Fig. 58. -vise, 

 lock nuts, couplings, reducing couplings, and unions. 



Fig. 59. Pipe wrench. 



