R016600x

Section I I - General Information

g = Acceleration of gravity = 32.2 ft/s 2 (9.8 m/s 2 ) k = Liquid factor of ... 1.5 for water 1.4 for deaerated water 1.3 for semi-closed receiver water

Table 2-5: Clayton Pump Speeds Generator E154 E204 E254 E304 E354 E404 E504 E604 E654 E704 E804 E1004 Pump Speed (RPM) 432 288 360 432 510 288 372 450 512 552 n/a a a These calculations do not apply to the multistage centrifugal pumps used by E804 and E1004 generators. n/a a

Since this equation is based on ideal conditions of a relatively short, non-elastic suction line, calcu- lated values of H a should be considered as approximations only.

NOTE As pump speed (N) is increased, mean flow velocity (V) also increases. Therefore, acceleration head (H a ) varies as the square of pump speed.

NOTE Acceleration head varies directly with actual suction pipe length (L).

IMPORTANT ACCELERATION HEAD IS A SUCTION PIPING SYSTEM FACTOR THAT MUST BE ACCOUNTED FOR BY THE PIPING SYSTEM DESIGNER. MANUFACTURERS CANNOT ACCOUNT FOR THIS IN THEIR DESIGNS BECAUSE OF THE LARGE VARIETY OF APPLICATIONS AND PIPING SYSTEMS PUMPS ARE INSTALLED IN.

NOTE If acceleration head is ignored or miscalculated, significant pump and piping system problems (suction and discharge) may result.

Clayton recommends placing a suction pulsation dampener or stabilizer adjacent to the positive dis- placement reciprocating pump suction connection. This will help to protect the booster pump from the pul- sating fluid mass inertia of the reciprocating PD pump and to reduce the effect of acceleration head.

2-27

08/11/2016

Sect02_Genrl-xx4_t.fm