FRV RC32 Branches & Friction Loss

Friction Loss for 38mm Hose @ 500lpm

220kpa

Friction Loss for 50mm Hose @ 500lpm

75kpa

Friction Loss for 50mm Hose @ 750lpm

220kpa

Friction Loss for 65mm Hose @ 500lpm

25kpa

Friction Loss for 65mm Hose @ 750lpm

55kpa

Friction Loss for 65mm Hose @ 1000lpm

100kpa

Friction Loss for 90mm Hose @ 2000lpm

100kpa

Friction Loss Laws (acronym)

DRISL

DRISL: D

Diameter : Friction loss increases directly with the decrease in diameter

DRISL: R

Roughness : Friction loss increases with the roughness of the hose interior

DRISL: I

Independent : Friction loss is a function of flow, independent of pressure

DRISL: S

Square : Friction loss increases directly as the square (^2) of the flow rate

DRISL: L

Length : Friction loss increases directly with the length of the hose.

Operating Pressure: Black Branch

700kpa - standard 400kpa - low

Operating Pressure: Blue Branch

500kpa

Operating Pressure: Purple Branch

300kpa

Operating Pressure: Ground Monitor

700kpa - standard 400kpa - low 1200kpa - max

Flow Rate: Black Branch

260-750lpm - auto 500lpm - 38mm hose 750lpm - 50mm hose

Flow Rate: Blue Branch

100lpm 250lpm 500lpm Selectable

Flow Rate: Purple Branch

450lpm Fixed Flow

Flow Rate: Ground Monitor

2000lpm

Ground Monitor Safety

1. Legs must be fully extended 2. Max 1200 kPa operating pressure 3. Must be crewed at all times 4. Tie off where possible

Functions of the Ground Monitor

1. Has a latch on bail to open 2. Has a safety shutoff 3. If slope greater than 10° slope – safety shut off won’t work 4. Jet Reaction – nozzle facing up is safest

PDP

Pump Delivery Pressure