Jerguson® Weld Pad™ Liquid Level Gages

Weld Pad Gages for Economical Level Indication on Non-Critical Applications

Series W20 & W300L


Features

• Applied directly to tank
• User must determine if acceptable for ASME Sec. VIII
• Recessed Gasket Seat in Chamber and Cover
• Tempered Borosilicate Glass conforming to BS3463, JIS B8211, & DIN 7081
• Wetted Parts conform to NACE MR0175 & MR0103
• All parts listed in ASTM & ASME B31 .3

Standard Weld Pad Gages
Available in both reflex and transparent types. Generally used for non-critical applications. When using standard weld pad gages, the tank must be relieved of pressure and drained to service the gage. Seal pots are a typical application. This type of gage is not used on critical process equipment because you cannot perform maintenance or replace a gage without shutting down the entire process.

Isolable Weld Pad Gages
Jerguson Isolable Weld Pad Gages follow the general design of standard Jerguson weld pad gages but oer the additional advantages of integral valves. Because the gage can be isolated from the vessel by the valves, gaskets or glass can be replaced without lowering the level of liquid below the gage inlet or relieving pressure from the vessel. Isolable gages are installed by matching the valve inlets with holes drilled in the vessel and making a 100% fillet weld between the vessel wall and the valve inlets. The gage chamber is tack welded to the vessel.

 

Series RW400
For Pressures Up To 400 PSI @ 400˚F

Low Pressure Weld Pad Gages Reflex Only – 2 Hole Pad Design

Features
• Welded directly to the vessel
• User must determine if acceptable for ASME Sec. VIII
• Recessed Gasket Seat in Pad only
• Tempered Borosilicate Glass conforming to BS3463, JIS B8211, & Din 7081
• Wetted Parts conform to NACE MR0175 & MR0103
• All parts listed in ASTM or ASME

These weld pads are available with reflex type glass only. The pad features a 2-hole design which allows fluid to flow freely through the gage, provides more reinforcement when welded to the vessel and simplifies fabrication as the vessel wall only needs two thru-holes to match the pad vs. machining a slot. As an option, the pad can be machined with a radius to conform to the vessel O.D. The pad comes standard with a recessed gasket surface to provide lateral support and facilitate positioning during assembly. All weld pads are constructed from high quality materials listed in ASME Section II. The gages come complete with precision die cut gaskets and tempered borosilicate glass which conforms to DIN 7081. Weld pads are generally used for non-critical applications because the process must be shut down for gage maintenance or replacement.

Resources:

Bulletins: J100.15 Series W20 & W300L Gages
RW400 Low Pressure Weld Pad Gages Reflex Only – 2 Hole Pad Design

IOM: J500.11 Weld Pad Gages

Specification Guide: Weld Pad Specification Guide

Drawings: Series 20 Weld Pad
Series 20 Isolable Weld Pad
Series 300L Weld Pad
Series 300L Isolable Weld Pad
Series RW400 Weld Pad