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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Types of Pressure Relief Valves for Industrial Udyog Applications – Complete Guide

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Pressure relief valves (PRVs) prevent equipment damage by releasing excess pressure. For industrial Udhhyog applications, types include spring-loaded, pilot-operated, balanced bellows, and temperature-actuated PRVs. Each type suits specific systems like steam, gas, liquid, and chemical processes, with price ranges from ₹1,200 to ₹10,000.

 Introduction to Pressure Relief Valves (PRVs)

What is a Pressure Relief Valve?

A pressure relief valve is a safety component designed to open at a preset pressure level to protect vessels and systems from overpressure.

 Types of Pressure Relief Valves

1. Spring-Loaded PRV

  • Most common type

  • Opens against spring force when pressure exceeds limit

  • Applications: steam boilers, gas lines

2. Pilot-Operated PRV

  • Uses a pilot valve to control the main valve

  • Accurate for high-pressure systems

  • Applications: petrochemical, power plants

 3. Balanced Bellows PRV

  • Balances back pressure using bellows

  • Suitable for fluctuating downstream pressure

  • Applications: chemical processing, refineries

 4. Temperature-Actuated PRV

  • Responds to temperature instead of pressure

  • Used in hot water systems, heat exchangers

5. Pressure Vacuum Relief Valves

  • Prevents vacuum formation in storage tanks

  • Used in volatile fluid handling industries

 Price of Pressure Relief Valves in India (2025)

TypeSize RangeMaterialAvg Price (INR)
Spring-Loaded PRV1/2" to 4"SS304, Brass₹1,200 – ₹4,000
Pilot-Operated PRV1" to 6"Cast Steel, SS₹5,000 – ₹10,000
Balanced Bellows PRV1/2" to 3"SS316, Bronze₹2,500 – ₹6,500
Temperature-Actuated PRV1/2" to 2"Brass, SS₹1,000 – ₹3,500

๐Ÿ“… Prices may vary based on certifications (ISI, CE), pressure ratings, and location.

 Industrial Udhhyog Applications of PRVs

Key Industries

  • Oil & Gas

  • Power Generation

  • Chemical & Pharmaceutical

  • Food Processing

  • Water Treatment Plants

 Benefits in Udyog

  • Prevents catastrophic equipment failure

  • Ensures personnel and plant safety

  • Meets regulatory compliance (API, ASME standards)

 How to Choose the Right PRV

 Selection Criteria

  1. Operating Pressure & Temperature

  2. Fluid Type (Steam, Gas, Liquid)

  3. Valve Size & Inlet/Outlet Connections

  4. Material Compatibility

  5. Certification (API 526, ISO 4126)

 Top Pressure Relief Valve Manufacturers in India

  • LEADER Valves – Punjab

  • Zoloto Valves – Jalandhar

  • Sant Valves – Haryana

  • Audco India – Chennai

  • Kranti Valves – Maharashtra

Available on TradeIndia, Justdial, and IndiaMart for wholesale & Udyog bulk supply.

 FAQs 

Q1. What is the most common type of pressure relief valve?

Answer: Spring-loaded PRVs are the most commonly used due to simplicity, reliability, and affordability.

Q2. Which valve is suitable for chemical plants?

Answer: Balanced bellows PRVs are ideal as they handle backpressure and corrosive fluids effectively.

Q3.Can I use a PRV for hot water systems?

Answer: Yes, temperature-actuated PRVs are suitable for water heaters and thermal systems.

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