Sight Glass Accessories
Sight glass cutters, washers (EPDM and friction), guard rods, and valve sets are all available.
View the chart below for a list of sight glass accessories we supply. Scroll down for pictures and info.
Please contact us for price and availability.
Available Sight Glass Accessories
Sight Glass Cutters
Sight glass cutters (also called “gauge glass cutters”) are used to trim pieces of tubular sight glass. Although Keystone does supply trimmed lengths of glass, if you frequently need various sizes of sight glass, purchasing your own cutter can be a good option.
Contact us for pricing and stock checks. See the chart below for more information on models available.
Valve Sets
Liquid level gauge valve sets come in a variety of sizes, materials, and features. The most common sets are either 1/2″ threaded connections with 5/8″ O.D. Glass, or 3/4″ threaded connections with 3/4″ O.D. Glass.
Contact us for pricing and stock checks. See the chart below for more information on models available.
Guard Rods
Most gauge glass valve sets require either 2 or 4 guard rods which help protect against side impact and also help keep the valves aligned over the glass distance. Guard rods are made of either copper or stainless steel and can be cut to length for your specific needs.
Contact us for pricing and stock checks. See the chart below for more information on models available.
Washers
In order to make sure that you have the best possible seal, we recommend changing your gauge glass friction and compression washers when you change your glass tubing. Washers come in a variety of dimensions and materials depending on the valves they’re going into and other application factors.
Contact us for pricing and stock checks. See the chart below for more information on models available.
Contact Us
Do you still have questions? Are you looking for pricing information or to place an order?
Do you have questions about Sight Glass Accessories?
Are there more products than guard rods to protect tubular glass from impact?
Yes, please take a look at our Gauge Glass Guardian page.
Are there other sight glass cutter versions available?
While we mostly stock tubular glass cutters like the one shown, other versions are available and we are happy to quote them.
How long should my guard rods be if I am replacing them?
Usually we see guard rods cut to roughly 2 inches longer than the valve center-to-center distance, but this number can vary by valve set
What’s the difference between a Friction Washer and a Compression Washer?
Friction washers tend to be metal and fit between the compression washer and the holding nut on the gauge valve to let the nut turn without snagging anything. Compression washers are made of a compressible material and create a snug seal around the glass to prevent leakage.
What kinds of materials do Gauge Glass Washers come in?
Friction washers tend to come in either brass or stainless steel. Compression washers can be found in EPDM, BUNA-N, Teflon, Viton, Graphite, and others.