FIREFIGHTER II LESSON 12. TYPES OF VALVES Ball — Ball — Controls nozzle flow and pump discharge rates Gate — Gate — Controls hydrant flow Butterfly.

FIREFIGHTER II • LESSON 12

TYPES OF VALVESTYPES OF VALVES

• Ball — Ball — Controls nozzle flow and pump discharge rates

• Gate — Gate — Controls hydrant flow

• Butterfly — Butterfly — Regulates large pump intakes

• Clapper — Clapper — Allows connection of single intake hose to siamese before addition of more hoses

TS 12–1

VALVE DEVICESVALVE DEVICES

• Wye appliancesWye appliances — One female and two or more male outlets

• Siamese appliances Siamese appliances — Two or more female inlets and one male outlet

• Large diameter appliances and hydrant valvesLarge diameter appliances and hydrant valves

TS 12–2

FUNCTIONS OF HOSE FUNCTIONS OF HOSE ROLLERS & JACKETSROLLERS & JACKETS

• RollersRollers

To prevent damage to hose when it is dragged over sharp surfaces such as window ledges and roof edges

To facilitate movement of the hose or rope

• JacketsJackets

To temporarily restore ruptured hoselines

To temporarily repair a leaking coupling

To connect hose with mismatched or damaged screw-thread couplings

TS 12–3

HOSE CLAMP USESHOSE CLAMP USES

• To prevent charging the hose bed during hose-lay To prevent charging the hose bed during hose-lay operationsoperations

• To allow replacement of a burst section of hose To allow replacement of a burst section of hose without shutting down the water supplywithout shutting down the water supply

• To allow extension of a hoseline without shutting To allow extension of a hoseline without shutting down the water supplydown the water supply

• To allow advancement of a charged hoseline up To allow advancement of a charged hoseline up stairsstairs

TS 12–4

HOSE CLAMP GUIDELINESHOSE CLAMP GUIDELINES

• Apply hose clamp at least 20 feet Apply hose clamp at least 20 feet (6 m)(6 m) behind behind apparatus.apparatus.

• Apply hose clamp approximately 5 feet Apply hose clamp approximately 5 feet (1.5 m)(1.5 m) from coupling on incoming water side.from coupling on incoming water side.

• Stand to one side when applying or releasing the Stand to one side when applying or releasing the press-down type hose clamp.press-down type hose clamp.

• Center hose evenly in jaws to avoid pinching the Center hose evenly in jaws to avoid pinching the hose.hose.

• Close and open the hose clamp slowly to avoid Close and open the hose clamp slowly to avoid water hammer.water hammer.

TS 12–5

SERVICE TESTING SERVICE TESTING VS.VS. ACCEPTANCE TESTINGACCEPTANCE TESTING

• Service testing is done on in-service hose by fire Service testing is done on in-service hose by fire department personnel.department personnel.

• Acceptance testing is performed on unused hose Acceptance testing is performed on unused hose at the request of the purchasing agency and is at the request of the purchasing agency and is done by the hose manufacturer before the hose is done by the hose manufacturer before the hose is shipped.shipped.

TS 12–6

REASON & STANDARD REASON & STANDARD FOR SERVICE TESTINGFOR SERVICE TESTING

• Reason for service testing Reason for service testing — To ensure that in-service hose is being maintained in optimum condition

• Service testing standard Service testing standard — NFPA 1962, Standard for the Care, Use, and Service Testing of Fire Hose, Including Couplings and Nozzles

TS 12–7

SERVICE TESTING SCHEDULESERVICE TESTING SCHEDULE

• Once every five years from date of purchase, Once every five years from date of purchase, again at eighth year, and every two years again at eighth year, and every two years thereafterthereafter

• After being repairedAfter being repaired

• After being run over by vehicleAfter being run over by vehicle

TS 12–8

INSPECTION BEFORE SERVICE TESTINGINSPECTION BEFORE SERVICE TESTING

• Jacket defects Jacket defects

• Coupling damageCoupling damage

• Worn or defective gasketsWorn or defective gaskets

TS 12–9

ITEMS NEEDED FOR SERVICE ITEMS NEEDED FOR SERVICE TEST SITE PREPARATIONTEST SITE PREPARATION

• Hose testing machine, portable pump, or fire Hose testing machine, portable pump, or fire department pumper equipped with gauges department pumper equipped with gauges certified as accurate within one year before certified as accurate within one year before testingtesting

• Means of recording the hose numbers and test Means of recording the hose numbers and test resultsresults

• Tags or other means to identify sections that failTags or other means to identify sections that fail

• Nozzles with shutoff valvesNozzles with shutoff valves

• Means of marking each length with the year of the Means of marking each length with the year of the test to easily identify which lengths have been test to easily identify which lengths have been tested and which have not without looking in the tested and which have not without looking in the hose recordshose records

TS 12–10

SAFETY GUIDELINES FOR SAFETY GUIDELINES FOR HOSE SERVICE TESTINGHOSE SERVICE TESTING

• Examine hose before testing; remove from Examine hose before testing; remove from service hose that cannot be repaired.service hose that cannot be repaired.

• Use hose test gate valve to prevent the hose from Use hose test gate valve to prevent the hose from whipping back and forth in the event of a break.whipping back and forth in the event of a break.

• Stand or walk near the pressurized hose only as Stand or walk near the pressurized hose only as necessary.necessary.

• Ensure that all personnel in the area wear Ensure that all personnel in the area wear helmets as a safety precaution.helmets as a safety precaution.

TS 12–11a

SAFETY GUIDELINES FOR SAFETY GUIDELINES FOR HOSE SERVICE TESTING (cont.)HOSE SERVICE TESTING (cont.)

• When charging the hose, stand away from the When charging the hose, stand away from the discharge connection because of the danger of discharge connection because of the danger of the coupling pulling loose.the coupling pulling loose.

• To aid in detecting minor leaks and to prevent To aid in detecting minor leaks and to prevent slipping falls, keep testing area free of spills slipping falls, keep testing area free of spills when filling hoses and when discharging air from when filling hoses and when discharging air from them.them.

TS 12–11b

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without prior written permission from the publisher.