Chemical sight glass Type 318V

for industrial applicationsfor vesselsmonitoring

Overview
This circular sight glass fitting (type 318V) is a lightweight, flat design welded into or onto container walls to allow visual observation or illumination of the container interior, optimized for vacuum applications and low operating pressures.

Key features

• Flat, lightweight design compared to DIN 28120 variants
• Vacuum-optimised sealing concept (vacuum seal on media side via sealing rings)
• Glass clamped between two stainless steel flanges
• Designed to bridge the range between unpressurized and sturdier pressurised sight glasses

Options

• LED light (for Ex and Non-Ex areas)
• Spraying device SVIII
• FEP or Halar® coating for aggressive chemicals
• Custom made designs on request

Assembly components (illustrated)

• Screws
• Cover flange
• Glass cushion
• Sight glass plate
• Gasket
• Base flange

Dimensions (by nominal diameter DN)

• DN 50: Da 150 mm, Di 80 mm, h1 12 mm, h2 24 mm, Weight 3.4 kg
• DN 80: Da 175 mm, Di 100 mm, h1 14 mm, h2 24 mm, Weight 4.8 kg
• DN 100: Da 200 mm, Di 125 mm, h1 14 mm, h2 24 mm, Weight 5.7 kg
• DN 125: Da 220 mm, Di 150 mm, h1 16 mm, h2 24 mm, Weight 6.6 kg
• DN 150: Da 250 mm, Di 175 mm, h1 16 mm, h2 24 mm, Weight 8.3 kg
• DN 200: Da 300 mm, Di 225 mm, h1 16 mm, h2 24 mm, Weight 10.8 kg
• DN 300: Da 400 mm, Di 305 mm, h1 20 mm, h2 24 mm, Weight 20.8 kg

Accessories

• Sight glass wiper (manual cleaning)
• FEP protective screens / coatings
• Various LED lights (different designs)

Technical specifications

• Mounting: For welding in or on (similar to DIN 28120)
• Nominal sizes: DN 50 - DN 300
• Nominal pressure / application range: vacuum applications down to -0.9 barg up to operating pressure 2.5 barg
• Heat resistance: up to 200 °C (depending on configuration)
• Glass standard: borosilicate glass (DIN 7080) — alternative materials/coatings available on request
• Typical flange material: stainless steel (1.4571 / 316Ti)
• Sealing materials: configurable (PTFE (Teflon®), NBR, HNBR, FKM, FFKM, PEEK, EPDM, silicone, etc.)
• Coatings for aggressive media: FEP or Halar®
• Suitable for: liquid and gaseous media
• Manufacturer / Brand: ACI Industriearmaturen
• Custom manufacturing and custom sealing materials available