WaterOps
Card Set Information
Author:
dfrazier
ID:
128792
Filename:
WaterOps
Updated:
2012-01-18 19:14:36
Tags:
KFD Engineer Water Operations
Folders:
Description:
KFD Water Operations Presentation
Show Answers:
Residual Pressure Min
20 PSI
10, 20, 30 Rule (10, 15, 20)
10% drop in residual= 3 more like lines
15% = 2 more
20%= 1 more
Small diameter supply limits
No longer than 300 feet due to friction loss
Use parallel lines to reduce friction loss
Drafting- three lift types and distance
1. Theoretical lift- 33.9 in perfect vacuumn at sea level (.5/1000ft)
2. Maximum lift- 25 ft at sea level
3. Dependable lift 15 ft (70% pump capacity left to flow)
Drafting hose strainer distance
2 feet above bottom and below surface
Relay vrs Tender Supply
Relay if over 300 GPM is needed
Relay Residual Pressure
Always maintain 20 PSI residual (FL +20)
Dual Pumping (def)
Intake to intake
Uses residual flow from hydrant to feed second engine
Tandem Pumping (def)
Discharge to Intake
Doubles pressure available to 300 psi at full capacity
Tender Supply (less than 300 GPM)
Tender should be 1000-3000 Gallon capacity
Able to dump at 1000 GPM