Pumps casings for

Open the spillback around the discharge check valve to warm the pump case. For pumps with the suction on top of the pump s case, open the connection allowing the hot spill-back flow to recirculate to the bottom of the pump. The suction valve needs to be partly open. Wait until the pump case is uniformly warm. Starting a pump that is cold or unevenly... 

Small fittings on pump cases for pressure gages, sample connections, vapor vents, and drains should be seal-welded to the pump case up to the first valve. Where vibrations may be severe, the fitting should be braced. 

ANSI pump is designed per ANSI standard B73.1 and B73.2 for chemical process or light duty users. The standard configuration of an ANSI pump is end suction, frame mounted, with discharge in line with the centerline of pump casing. For each pump size, key envelope dimensions ate the same. Most ANSI pumps use open impeller. They are often used in corrosive service and many dilTerent material of construction are available. 

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