Liquid Dynamics International Ltd. - Piping System Analysis / Piping System Simulation

LDi – P31

LDi PulseView Program Input Data
Analysis and Prevention of Pump Pulsation and Cavitation

1. Liquid Parameters
(a) density of the liquid grams / cc
(b) compressibility of the liquid and any absorbed gas liters / bar
(c) effective vapor pressure at pump inlet temperature °C

2. Pipe Parameters
(i) Suction side
(a) expected theoretical steady state suction pressure BarA
(b) length of pipe from supply to suction acceleration
head loss preventer inlet meters
(c) inside diameter of pipe from supply to preventer inlet mm
(d) length of pipe from preventer to pump suction inlet meters
(e) inside diameter of pipe from preventer to pump suction inlet mm
(ii) Discharge side
(a) discharge pressure against which the pump must deliver BarA
(b) length of pipe from pump discharge check valve to discharge
acceleration head preventer inlet meters
(c) inside diameter of pipe from pump discharge to preventer inlet mm
(d) length of pipe from preventer discharge to final resistance meters
(e) inside diameter of pipe from preventer discharge to final resistance mm

3. Pump Parameters
(i) Pumping Mechanism
(a) connecting rod length meters
(b) crank shaft radius - i.e. half the piston stroke meters
(c) piston diameter meters
(d) effective dead volume of pump chamber liters
(e) number of strokes of one displacer per minute
(ii) Suction Check Valves
(a) valve seat diameter mm
(b) valve stroke mm
(c) valve mass, plus half the weight of one valve spring Kg
(d) starting resistance to compression of spring Kg
(e) string rate Kg/mm
(iii) Discharge Check Valves
(a) valve seat diameter mm
(b) valve stroke mm
(c) valve mass, plus half the weight of one valve spring Kg
(d) starting resistance to compression of spring Kg
(e) spring rate Kg/mm

4. Additional information – Requirements for the materials of construction
A. Metal
B. Membrane / Seal Material
C. Liquid(s) Description
D. Operating / Design Temperature
E. Specified Design Pressure
F. M.D.M.T
G. Connection Type, Size & Rating for Suction
Discharge
H. Any other information that you believe may be relevant:

CUSTOMER:
CUSTOMER REF:
ENGINEER’S NAME:
POSITION
QUANTITY
Q No.:
ISSUED BY:
CHECKED BY:
ISSUE DATE: