Jerguson Gage & Valve offers a complete line of brass, bronze and stainless steel tubular glass gage valves for economical service.
The standard straight-through flow design features a durable cast aluminum wheel. Connections of 1/2 or 3/4 inch NPT are available for attaching the valve to the vessel.
Highly durable Pyrex® gage glass is available with outside diameters of 5/8 or 3/4 inch. Visibility lengths vary as required. Guard rods are recommended to protect the glass from damage, and for added safety.
These tubular glass gage cocks represent years of experience in the manufacture of gage cocks and offer a variety of types of connections to suit all requirements. All have steel bodies with stainless steel trim.
Maximum working pressure dependent on length and resultant pressure rating of glass. See table at bottom of this page.
Series VA Automatic
Model No. VA-991 5/8 inch Diameter Glass, 1/2 inch NPT Vessel Connection
Model No. VA-902 3/4 inch Diameter Glass, 3/4 inch NPT Vessel Connection
These tubular glass gage valves feature bronze body construction. They come complete with corrosive-resistant ballchecks for automatic closure in the event of glass breakage. This ensures safety and prevents the loss of fluid. Maximum working pressure is 400 PSI @ 100°F, or 200 PSI @ 400°F.
Note: Pressure ratings will vary depending upon temperature, glass length and glass type. Refer to table at bottom for complete ratings.
Series VB Non-Automatic
Model No. VB-991 5/8″ Dia. Glass, 1/2″ NPT Vessel Conn.
Model No. VB-902 3/4″ Dia. Glass, 3/4″ NPT Vessel Conn.
These all bronze valves are similar to above models. However, ballchecks are not standard, thus making operation non-automatic. A 1/4″ needle drain valve in the lower unit accommodates a breakage condition. Either a 1/4″ lower arm ball or a petcock is available upon request. Sizes, packing materials and working pressures are identical to above models.
Series VC Automatic
Model No. VC-991 5/8″ Dia. Glass, 1/2″ NPT Vessel Conn.
Model No. VC-902 3/4″ Dia. Glass, 3/4″ NPT Vessel Conn.
Conforming to ASME power-boiler code requirements, these gage valves feature stainless steel ballchecks in both upper and lower units. This provides automatic closure in the event of glass breakage and requires the ballcheck in the lower valve to rise vertically to its seat. A safety handle is also provided for manual operation of the 5/16″ diameter drain valve. This valve is of the full-flow ball valve design.
The valve body is constructed of rugged, heavy pattern bronze. Standard packing materials are wear-resistant Teflon© – PTFE. Maximum working pressure is rated at 420 PSI @ 100°F, or 250 PSI @ 400°F.
Note: Pressure ratings will vary depending on temperature, glass length, and glass type. Refer to table at bottom for complete ratings.
Series VE Non-Automatic
Model No. VE-991 5/8″ Dia. Glass, 1/2″ NPT Vessel Conn.
Model No. VE-902 3/4″ Dia. Glass, 3/4″ NPT Vessel Conn.
These gage valves are identical in every respect to above models, except for the non-automatic design. Ballchecks are not included.
Note: Plastic protector enclosures are not available for the above glass gages.
Brochure: Bronze Tubular Glass Valves (V-Series)