John C. Ernst Co., Inc. - Sparta, NJ
Distributor, Manufacturer
Manufacturer of sight feed & porthole glasses. Types of glasses include level gauge, flat plate & flat gauge glasses. Level gauge glass are available in standard clear borosilicate, high pressure clear borosilicate, red line borosilicate & heavy wall borosilicate. Standard clear borosilicate are available in lengths up to 72 in. with ODs from 5/8 in. to 3/4 in. Flat plate glasses are available in clear annealed borosilicate, clear tempered borosilicate, blue cobalt furnace, Vycor®, clear fused quartz & amber Pyroceram®.
Brand Names: Duran
www.johnernst.com/glass_gaskets_index.html

Swift Glass Company, Inc. - Elmira, NY
Custom Manufacturer
Manufacturer of sight glasses including sight feed glasses. Features include shock resistant with annular edge. Specifications include tempering range from 1/8 in. up to 2 in. & glass size range from 1 in. up to 36 in. x 72 in. Capabilities include cutting, drilling, edge grinding, convexing & bending & tempering for increasing glass thickness. Hand-held digital measuring devices, optical comparators & inspection, spectrophotometer & polarimeter are used for checking tempering, light transmission, flatness & parallelism. Industries served include audio visual, chemical, electronics, nuclear, photographic, laser & solar power.
Brand Names: Borofloat, MacBeth, Pyrex
www.swiftglass.com/index.html

Sight Glasses Capabilities
	Glass Cutting & Waterjet Cutting Glass Milling Glass Drilling

Rayotek Scientific, Inc. - San Diego, CA
Manufacturer, Custom Manufacturer, Service Company
ISO 9001:2008 certified, full design standard, minority owned. Manufacturer of sight gages, sight windows, sight indicators & sight glasses for ultra-high vacuum, low pressure, ultra-high pressure & hazardous environments. Sealed into NPT, BSP & other threaded housings & CF, ASME & custom flanges made of stainless steel or customer required metals. Capabilities include designing, engineering, prototyping, molding, slumping, polishing, machining, grinding, cutting, brazing, sealing & strengthening. Large volume capabilities. SBA certified SDB.
www.rayotek.com/sight_glass_high_pressure_w...

Tate-Jones, Inc. - Pittsburgh, PA
Manufacturer
Manufacturer of safety sight glasses including standard & pressure tight observation ports. Materials include cast iron, carbon steel & stainless steel. Available in angular, single shutter & double shutter styles. Features include protective stainless steel screen, 1/4 in. NPT purge hole, mounting flange gasket & high-temperature sealant to prevent leakage. Sight glasses come with vycor clear, vycor blue, quartz clear & Pyrex clear glass. Specifications include viewing area from 2-3/4 in. x 3-1/2 in. to 5 in. x 9 in.
Brand Names: Saf-T-Eye
www.tate-jones.com/safteye_obports.html

Oil-Rite Corporation - Manitowoc, WI
Manufacturer, Custom Manufacturer
Manufacturer of sight glasses. Models to fit any application of vented & non-vented type gages. Available in aluminum, brass, steel, stainless steel, rigid or flexible plastic, gasketed, fused.
www.oilrite.com

Sight Glasses Products
	With Acrylic Sight With Pyrex Sight Over Flow Sights

Miller Plastic Products, Inc. - Burgettstown, PA
Manufacturer, Custom Manufacturer, Service Company
Custom plastic machining & fabricating. CNC machine facility.Types of plastic welding include speed, hand, extrusion & butt welding. All custom products including machined specialty components, non-standard fittings & flanges, pipe & header systems, pipe bending, tanks & vessels, tank liners, filter bodies, exhaust hoods & ducting. Made from samples, prints or sketches. Kynar® pipe fittings. High temperature & highly chemical resistant. Standard molded or custom machined fittings, valves & flanges.
www.millerplastics.com

Plast-O-Matic Valves, Inc. - Cedar Grove, NJ
Manufacturer, Custom Manufacturer
Manufacturer of standard & custom sight glasses. Features include 360 degree viewing area, double wall construction. Materials available include PVC, CPVC, PTFE or Kynar PVDF® & polypropylene. Services include product innovation, engineering, precision manufacturing, quality testing & hands-on technical assistance. RoHS compliant.
Brand Names: Plast-O-Matic, True Blue
www.plastomatic.com/sightglass_map.html

Glass Dynamics, LLC - Vineland, NJ
Manufacturer, Custom Manufacturer
Manufacturer of standard and custom optical glass. Custom shapes and coatings including anti-reflective (AR coating), dielectric max reflectors (Max R coating) and metalic reflectors.
www.glassdynamicsllc.com/optical.html

Sight Glasses Products
	Corning Pyrex® 7740: Medium Wall Corning Pyrex® 7740: Heavy Wall Corning Pyrex® 7740: Standard Wall

Gearench - Clifton, TX
Manufacturer, Custom Manufacturer
ISO 9001:2008 certified manufacturer of sight glasses used for pumpers & water haulers for seeing the flow through in storage tank drain lines. Sight glasses are available in operating temperatures ranging from minus150 degrees F to 165 degrees F, weights from 11-1/4 oz. to 1-3/8 lbs. with clear view nipple made from shatter-resistant polycarbonate, resistance to ultraviolet rays & pressure ratings up to 1000 psi.
www.gearench.com/products/sight-glass.asp

Cyclops Industries - South Charleston, WV
Manufacturer
Manufacturer and designer of safety sight glasses. Safety sight glasses are available with dimensional tolerance of plus/minus 0.0025 in. Features include break resistance. Safety sight glasses are suitable for industrial pressure vessels, chemical processing & pipelines. Safety sight glasses are approved to ASME standards.
Brand Names: Cyclops
www.cyclopswv.com/index.html

Sight Glasses Products
	Type F-HS Flange Mounted Sight Glass Type F-SS Flange Mounted Sight Glass Type F-GD Flange Mounted Sight Glass More

F.W. Webb Co. - Locations
Distributor, Custom Manufacturer
ISO 9002 certified distributor of gage & sight glasses.
webbconnect4.fwwebb.com/wcss/Safety,Safety_...

MSC Industrial Supply Co. - Melville, NY
Distributor, Custom Manufacturer
Supplier of 450,000 products from 2,500 mfrs.: cutting/machine/hand/power tools, MRO supplies, abrasives, fasteners, precision instruments, machinery, electrical supplies, safety equipment, HVAC, welding, hose, tubing, fittings, material handling, pumps, power transmission, janitorial; same day shipping
www.mscdirect.com

Specialty Glass Products, Inc. - Willow Grove, PA
Manufacturer, Custom Manufacturer, Service Company
Custom manufacturer of glass products including gage & sight glasses. Materials include borosilicate, Pyrex® 7740, dynasill 1100 FS, fused, GE 124 & NSG 0Z quartz, fused silica, sapphire, Borofloat®, silicon & soda lime. Applications include optical, biomedical, communications, laser manufacturing, aerospace avionics, semiconductor, fiber optic & electronics. ISO 9001:2000 compliant.
www.sgpinc.com/products.htm

Johnstone Supply - Portland, OR
Distributor
Distributor of sight glasses. Standard sight glasses and combination sight glass/moisture indicators in different styles and sizes are available.
Brand Names: 3M, Danfoss Bauer, Emerson Flow Controls, Milwaukee, Refrigeration Research, Superior, Weller
www.johnstonesupply.com/storefront/hvacr-pa...

GrayGlass (Gray Glass) - Queens Village, NY
Distributor, Manufacturer, Custom Manufacturer, Service Company
Manufacturer & distributor of sight glasses. Custom fabricated specialty, high temperature, safety flat glass, tubing, windows, Pyrex™, Vycor™, quartz, Borofloat™ clear ceramics. Tempered, laminated & chemically strengthened.
Brand Names: AFG, Devon, Guardian, Kopp, Pilkington, Pyrex, Saint-Gobain
www.grayglass.net/productMain.cfm

Colton Industries - Buffalo, NY
Manufacturer, Custom Manufacturer
Manufacturer of sight glasses designed to allow for visual inspection of steam trap discharge. Available with forged brass body & cover, glass windows, PTFE balls, non-asbestos fibre gaskets & steel bolts. Features include sizes from 1/2 in. npt to 1 in. npt., pressure ratings for steam & condensate systems up to 120 PSI at 350 degree F & for air & water systems up to 150 PSI at 212 degree F.
products.coltonind.com/category/all-categor...

Walker Engineered Products - New Lisbon, WI
Custom Manufacturer, Service Company
Custom fabricator of tank & vessel parts & accessories including sight glasses. Parts & accessories also include casters, level devices, no-foam inlets, scraper blades, seals, RTDs, rupture discs, replacement drives, gaskets & vent filters.
www.walkerep.com/products/parts--service/pa...

Schroeder Industries LLC - Leetsdale, PA
Manufacturer, Custom Manufacturer
ISO 9001:2008 certified manufacturer of oil sight glasses made of cast acrylic. Types include 3-D, high temperature, horizontal and vertical oil sight glasses. Various features include mounting nipples, drain valves, vulcanized rubber seals, hydrocarbon and petroleum resistance. Other products such as filter skids, vacuum dehydrators, adapters, hose joiners, hoses, adjustable pressure limiters, pressure gauges & test kits are available.
www.schroederindustries.com/oil-sight-glass...

Diamond Needle Corp. - Carlstadt, NJ
Distributor, Service Company
Distributor of parts including rubber drives & sight glasses. On-time delivery.
www.diamondneedle.com/pdf/Cutting%20Room%20...

Flabeg Technical Glass US / Naugatuck Glass - Naugatuck, CT
Manufacturer, Custom Manufacturer
ISO 9002 certified manufacturer of precision glass components including sight glass. Products include flat glass, bent glass, optical components, metalized components & mirror components. Range of glass thickness from 0.043 - 0.134 in & a standard cutting tolerance of plus/minus 0. 10 - 0.020. Applications & industries served include cosmetics, novelty, automotive & solar power reflectors. Military Spec. MIL-105D compliant.
www.flabeg.com/index.php?id=112&L=1

Cyclonaire Corp. - York, NE
Manufacturer, Service Company
Manufacturer of pneumatic conveying component parts including heavy duty flanged sight glasses. Available in 2 in. to 8 in. sizes. Features include flanged connection & through-rod stiffeners. Flanges are available in carbon steel & stainless steel flanges. 24 hour customer service available.
Brand Names: Cyclonaire
www.cyclonaire.com/products/parts/butterfly...

National Bulk Equipment, Inc. - Holland, MI
Manufacturer
Manufacturer & designer of sight glasses. Available in 7 in. cast acrylic resin sight glasses are constructed from aluminum, carbon or stainless steel tube fittings. Sight glasses are available with fitting tube OD sizes from 1.5 in. to 6 in. & 11 ga. to 16 ga. thickness.
www.nbe-inc.com/component_catalog.php?produ...

Dometrics, Inc. - Franklin, NC
Distributor
Distributor specializing in the supply of machine replacement parts for European made machinery. Foreign-based companies build much of the machinery being used in manufacturing industries. The supply of machine replacement parts for this machinery is critical in the global market. Represents the manufacturers of the components to this machinery.
www.dometrics.com/

Seal Fast, Inc. - Houston, TX
Distributor, Manufacturer
Manufacturer and distributor of acrylic sight glasses. Available in 4 in. sizes.
sealfast.thomasnet.com/item/bottom-loading-...

Sight Glasses Products
	Acrylic Sight Glass TTMA

Abrisa Technologies - Santa Paula, CA
Distributor, Manufacturer, Custom Manufacturer, Service Company
ISO 9001:2008 certified manufacturer of sight glass used for dial applications. Sight glass diameters range from 0.200 in to 21 in. & thickness varies depending on material. Sight glass applications include chemical explosion-proof windows, low & high pressure fluid sights, furnace & oven heat resistant observation windows & port, air-conditioner dryer view ports, oil level sights & aircraft camera view ports.
Brand Names: Pyrex
abrisatechnologies.com/products-services/