How to Use a Puddle Flange in RCC Slab Construction – Step-by-Step Guide

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  A puddle flange is a simple yet essential fitting used in civil construction to prevent water leakage where pipes pass through concrete structures. In RCC (Reinforced Cement Concrete) slabs, these flanges act as a seal that stops water from migrating along the outer surface of a pipe. Whether you are working on water tanks, basements, lift pits, or underground pipelines, installing a puddle flange correctly ensures waterproofing and structural durability. This step-by-step guide from Udhhyog , a leading supplier of GI, MS, and SS puddle flanges in India, explains how to use a puddle flange during RCC slab construction. ๐Ÿงฐ Step-by-Step Guide ✅ Step 1: Choose the Right Puddle Flange Select a puddle flange based on the pipe size and material (MS, GI, or SS). GI puddle flanges are ideal for general drainage and water pipes. Use stainless steel for corrosive environments or coastal zones. At Udhhyog , we provide puddle flanges in custom sizes with...
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Pressure Relief Valve Working Principle Explained with Diagram & PDF (2025)

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A pressure relief valve (PRV) works by opening at a preset pressure to release excess fluid or gas, preventing system damage or failure. It automatically resets once normal pressure resumes.

What is a Pressure Relief Valve?

 Definition

A pressure relief valve is a safety device used in piping systems to protect against over pressure conditions by venting fluid until pressure returns to safe levels.

 Working Principle of a Pressure Relief Valve

Step-by-Step Functioning

  1. Normal Flow: Valve remains closed under system operating pressure.

  2. Over pressure Condition: When pressure exceeds the set limit, force overcomes the spring tension.

  3. Valve Opens: Excess fluid or gas is vented through the outlet.

  4. Pressure Normalizes: Valve reseats automatically once pressure drops below the set point.

⚠️ Important: The PRV must be correctly calibrated to prevent damage or leaks.

 Diagram of Pressure Relief Valve

Visual Representation

Labels:

  • Spring

  • Adjusting Screw

  • Valve Seat

  • Inlet & Outlet

Applications in Udhhyog (Industries)

Where PRVs Are Used

  • Oil & Gas

  • Steam Boilers

  • Chemical Plants

  • Water Heaters

  • Hydraulic Presses

FAQs 

Q1. What triggers a pressure relief valve?

Answer: It opens when system pressure exceeds the valve's preset limit.

 Q2. Can a PRV be reused after activation?

Answer: Yes, if it's undamaged and reseats properly, but frequent triggering may require replacement.

Q3. What is the difference between PRV and PSV?

Answer: PRV is mainly for liquid systems, PSV (pressure safety valve) is typically used in gas systems.

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