PVDF Sight Glass
PVDF Sight Glass Manufacturer
The MVS PVDF Sight Glass is a high-clarity visual inspection solution engineered for aggressive chemical environments. Designed with full PVDF housing and a durable borosilicate glass tube, this unit ensures 360° visibility for safe and continuous monitoring of fluid flow. With a three-piece sturdy construction, it provides a wide viewing area for operators to clearly observe flow conditions in corrosive pipelines, helping to prevent process interruptions or failures. Mayur (Valves) System Private Limited, an ISO 9001:2015-certified company, has been a trusted PVDF Sight Glass manufacturer and exporter since 1978. We export to 40+ countries worldwide, with a strong focus on consistent quality, timely delivery, and a smooth customer experience. Our PVDF Sight Glass products serve clients across Europe, North America, the Middle East, Southeast Asia, Russia, and other international markets, meeting diverse industrial requirements with dependable solutions and technical expertise.
This corrosion resistant thermoplastic sight glass is available in sizes ranging from DN 15 to DN 150 (½″ to 6″) and is compatible with ANSI and DIN flange standards, pressure rated up to PN 16 (~10 bar), and capable of withstanding temperatures between –20 °C and +120 °C. Whether it’s handling water, acids, bases, or ultra-pure chemicals, this chlorine resistant thermoplastic PVDF sight glass offers excellent chemical compatibility and mechanical strength under demanding conditions.
The chemical resistant polypropylene sight flow indicator and PPH sight glass supplier options make MVS Sight Glass ideal for viewing media such as sulphuric acid, nitric acid, hydrochloric acid (HCL), and chlorine-based solutions. Its tubular construction ensures low pressure drop and is commonly used in chlor alkali systems, bromine handling lines, and sodium hypochlorite flow indicators.
Engineered for long service life and low maintenance, the PVDF sight flow indicator from MVS is built to meet global safety and quality standards. It enables safe visual control over flow and filling in process lines, ensuring reliable and clear operation even in the most chemically aggressive environments.
Specification
| Specification | Details |
|---|---|
| Product Type | PVDF tubular sight glass |
| Size Range | ½″–6″ (DN 15–150) |
| Pressure Rating | PN 10–16 (~10 bar); ANSI 150# |
| Temperature Range | –20 °C to +120 °C |
| Connections | ANSI B16.5 / DIN EN 1092‑1 flanges |
| Glass Tube | Borosilicate (“heavy-wall”) |
| Seals | EPDM or FKM O-rings |
| Orientation | Horizontal or vertical installation |
| Standards | DIN/ANSI, vacuum-rated equivalent to pressure rating |
Material of Construction
| Body Material Options | PP (Polypropylene), ISOTACTIC PP, PVDF (Poly-Vinyli-dene-Fluoride) |
| Glass Tube | Toughened Glass (Standard Lengths: 4", 6") |
| Seat / Seal Options | PTFE Seals or Elastomer Seals (for aggressive chemical compatibility) |
Application Industries
Crude Oil & Natural Gas Industry
Chemical & Petrochemical Industry
Water & Wastewater Treatment
Nuclear & Thermal Power Generation
Food & Beverage Industry
Pharmaceutical & Biotechnology
Pulp & Paper Industry
Mining & Mineral Processing
Marine & Shipbuilding
HVAC & Building Services
Automotive & Paint Chemical Manufacturing
Environmental & Bio Gas Renewable Energy
Steel & Metal Processing
Fertilizer Plants, Polymer Production
Cosmetics & Personal Care
Cement & Construction
Chlor-Alkali Industry
Mineral Acids Industry
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PVDF Sight Glass
Frequently Asked Questions
Can’t find your duty condition here? Send us the media, size, pressure and temperature and we will specify the valve. Contact us
What is a PVDF sight glass and how does it work?
A tubular sight glass with a thermoplastic body and a toughened glass tube, fitted into the line so you can see the fluid inside it. Unlike a window-type sight glass, the tubular design lets you see the whole bore rather than a patch of it — so you can tell at a glance whether the line is running full, part-full or empty, and whether the fluid has changed colour or picked up solids.
Which body, tube and seal materials are available?
Body in PP (polypropylene), isotactic PP or PVDF. Glass tube in toughened glass, in standard lengths of 4″ and 6″. Seals in EPDM or FKM O-rings, or PTFE seals and elastomer seals for aggressive chemical compatibility. Choose PTFE seals where the media would attack an elastomer O-ring.
What size, pressure, temperature and connections apply?
½″ to 6″ (DN 15 – DN 150), rated PN 10–16 (approximately 10 bar) / ANSI 150#, over a temperature range of −20 °C to +120 °C. Connections to ANSI B16.5 or DIN EN 1092-1 flanges. It can be installed horizontally or vertically, and is vacuum-rated equivalent to its pressure rating — so it can be used on lines that see vacuum as well as pressure.
Tubular PVDF or a lined window type — which should I use?
A tubular PVDF sight glass shows the whole bore and suits thermoplastic pipework up to 120 °C and about 10 bar. A PTFE lined sight flow indicator in a metal body takes higher duty and mechanical abuse, and a double window sight glass is the non-corrosive equivalent. Choose the tubular version for visibility on plastic lines, a lined metal body where duty or handling is harder.
Are you a manufacturer, and what are your minimum order quantity and customization options?
MVS manufactures at its own works — since 1978, ISO 9001:2015 certified — and exports across several continents. The minimum order quantity is 20 pieces. PVDF bodies, PTFE seals, alternative tube lengths and ANSI or DIN flange connections are built to order.