San Francisco : Architect and Engineer, Inc · leaf 259
nd mortar mixers. The ContractorsPump Standards cover specifications fordiaphragm and self priming centrifugalpumps, standards which are widely usedby procurement agencies and contractors,and are revised as the need occurs to meetchanging industry conditions. IMPROVEDPRECISIONBENCH SHAPER An… … A cam operated piston pump circulateslubricating oil from a large reservoir to allimportant bearing surfaces. Oil pressure isadjustable and can be maintained at allspeeds which cushions the shock of re-ciprocating ram action and interruptedcuts, resulting in exceptionally smoothand quiet operation…
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