Excerpt from Johnson's New Handy Manual on Plumbing, Heating, Ventilating and Mechanical Refrigeration
The standard sizes given can be used where there is ordinary steam pie ssure, . Say 40 to 100 lbs. If the steam pressure is ower it is necessary to use a pump with a large steam cylinder, or if high pres sure is carried at all times a smaller steam c ylinder may be used. For im$tance, 1f a 5x7x10 pump ywould ordinarily be used, if steam pres...
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