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water flow detector
  • water flow switch: TEWA SPRAY
描述

TEWA SPRAY FIRE PROTECTION TECHNOLOGY CO.,LTD. The water flow detector  shall be installed on system piping as designated on the drawing and/or as specified herein. Water flow indicators shall mount on any clear pipe span of the appropriate normal size, either a horizontal or vertical pipe. The indicators shall have a sensitivity in the range of 4-10 gallons per minute and a static pressure rating up to 450psi for 2”-8” (50mm thru 200mm) pipes. The indicator shall respond to water flow in the specified direction after a preset time delay that is field adjustable. The retard structure shall be a sealed mechanical pneumatic unit with visual time delay adjustment.

Rating Pressure:   

Up to 450PSI (3.1MPa)

Flow Sensitivity:

4-10GPM (15.0-37.5L/min)

Maximum Surge:

18FPS (5.5m/s)

Contact Ratings: 

Two sets of SPDT (Form C)

 

2.0Amps at 24 VDC

Enclosure Rating:  

NEMA 4- suitable for indoor/outdoor use

Conduit Entrances: 

Two opening for 1/2" conduit

 

One open, one knock-out type

Compatible Pipe:  

Steel water pipe, schedule 10 through 40

Service Use: 

Automatic Sprinkler: NFPA-13

 

One or Two Family Dwelling: NFPA-13D

 

Residential Occupancies up to 4 stories: NFPA-13R

 

National Fire Alarm Code: NFPA-72

Warranty:  

3 Years