In this video, we'll be talking about Supervisory Valves in Firefighting in Urdu/Hindi. What are Supervisory Valves according to NFPA 20, and what does their role in emergency firefighting entail? We'll also be giving you a brief introduction to the valve types and their uses. Finally, we'll be giving you a quick guide on how to use Supervisory Valves in firefighting. If you found anything which is inappropriate then convey it in the comments for my information and rectification in the future.

00:00 Introduction
00:45 Supervisory valves in firefighting
00:58 Supervision valves in drawing
01:40 Butterfly valve with supervisory switch
02:32 OS&Y gate valve and tempering switch
03:36 Supervisory valve in zone control valve assembly
05:43 Supervisory valve in Alarm Check Valve Assembly
06:33 Butterfly valve with supervisory switch details
08:50 OS&Y valve with tempering switch details
11:43 NFPA 20 Valve Supervision
12:35 Where supervisory valves are required?

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