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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Sight Glass Valve Working Principle & Selection Tips

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A Sight Glass Valve allows visual inspection of fluid flow in pipelines. It works by combining transparent glass tubing with control valves, offering real-time monitoring. Ideal for Udhhyog setups in chemical, pharma, and ETP industries. Selecting the right type involves checking pressure rating, material, and fluid compatibility.

๐Ÿ”ง What is a Sight Glass Valve?

A Sight Glass Valve is a pipeline component with:

  • Transparent borosilicate or tempered glass

  • One or more valves to control flow

  • Metal body (SS, bronze, CI)

๐Ÿ”น Features:

  • Live fluid visibility

  • Operational control

  • Pressure resistance up to 40 bar

⚙️ Working Principle of Sight Glass Valve

Step-by-Step Functioning:

  1. Fluid enters through the inlet side

  2. Sight glass chamber allows viewing of flow

  3. Valve mechanism controls or isolates flow

  4. Drain/vent ports may release excess fluid or air

Works on direct visual monitoring—no sensors or power required

๐Ÿงช Types of Sight Glass Valves

TypeFeaturesCommon Udyog Use
Flanged TypeHigh pressure, bolted flangeOil, petrochemical pipelines
Threaded TypeEasy to install, cost-effectiveETPs, STPs, small Udhhyog
Welded TypePermanent setup, no leak chancesHazardous chemical handling
Double Window TypeFront & rear viewBoiler & high-temp operations
Tubular TypeLong transparent glass tubeMilk, pharma, water filtration

✅ How to Select the Right Sight Glass Valve

1. ✅ Material Selection:

  • SS304/316: Chemical, pharma

  • Bronze: Oil, lubricants

  • Cast Iron: General water, low-pressure

2. ✅ Glass Type:

  • Borosilicate: High temperature

  • Acrylic: Low pressure, cost-friendly

3. ✅ Pressure/Temperature Rating:

  • Min: 10 bar / 80°C

  • Max: 40 bar / 300°C

4. ✅ Mounting:

  • Horizontal for tanks

  • Vertical for pipelines

 Sight Glass Valve Price in India (2025)

Size (inches)MaterialApprox Price (INR)
½” – 1”Bronze₹2,500 – ₹3,500
1” – 2”SS316₹3,500 – ₹6,500
2” – 3”Cast Iron₹4,000 – ₹7,000

Price varies by pressure rating, brand, glass type, and valve count.

 Udhhyog Applications of Sight Glass Valves

✅ Major Industries:

  • Chemical Processing

  • Pharma Udyogs

  • Boiler & Steam Plants

  • Water & Effluent Treatment (ETPs)

  • Beverage & Food Industry

๐Ÿ›  Common Uses:

  1. Observe fluid clarity

  2. Spot contamination or bubbles

  3. Flow direction confirmation

  4. Emergency shut-off & inspection

Installation & Maintenance Tips

✅ Installation:

  • Align vertically or horizontally based on design

  • Use gaskets and PTFE tape

  • Ensure no airlocks

✅ Maintenance:

  • Inspect for leaks every 3 months

  • Clean glass tube regularly

  • Replace seals yearly for Udyog plants

๐Ÿ›’ Top Sight Glass Valve Suppliers in India

Verified Platforms:

  • IndiaMART – Industrial-grade valves, bulk orders

  • Justdial – Local dealers, same-day delivery

  • TradeIndia – Certified Udyog suppliers


 FAQs

How does a sight glass valve work?

It allows fluid to pass through a transparent chamber, offering a real-time visual of flow while also being controllable via attached valves.

Where is a sight glass valve used?

It is used in industries like pharma, chemicals, and wastewater to monitor liquid clarity, detect air bubbles, and inspect flow behavior.

What is the cost of sight glass valves in India?

Prices start at ₹2,500 for small sizes and can go up to ₹7,000+ depending on the material and design.

Can I install a sight glass valve vertically?

Yes. Vertical installation is common in pipelines. Horizontal mounting is preferred for tanks and larger flow lines.

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