United Brass Works 905A Short Shank Upper Fixture Overview
The United Brass Works 905A is a 1/2-inch short shank upper water gauge fixture designed for water and steam applications. It is used as the upper fixture in compatible gauge glass assemblies that provide direct visual indication of liquid level in boilers, tanks, vessels, and other industrial equipment.
The short-shank configuration distinguishes the Model 905A from the United Brass Works Model 905 long-shank upper fixture. Selecting between long- and short-shank designs allows the gauge fixture arrangement to be matched to the available installation space, vessel connection, insulation thickness, gauge-glass position, and other dimensional requirements of the equipment. United Brass Works lists both configurations within its family of individual water gauge fixtures. United Brass Works, Inc.
The United Brass Works 905A is rated for 250 WSP at temperatures up to 406°F and 400 WOG. These ratings make the fixture suitable for industrial water and steam systems operating within the manufacturer’s published pressure and temperature limitations. The manufacturer identifies water and steam as the intended applications for this model. United Brass Works, Inc.
A rising stem design is incorporated into the fixture. As the hand wheel is operated, movement of the stem provides a visible indication of valve position. The fixture can therefore be used to manually isolate the upper connection of the gauge glass when maintenance, inspection, cleaning, or replacement of the water gauge assembly is necessary.
The Model 905A uses a bronze body with a brass stem and brass components at several sealing and connection points. The manufacturer’s material specification lists a ductile iron hand wheel, steel screw and washer, brass packing nut, brass glass washer nut, EPDM glass washer, brass bevel washers, and NAFG packing. United Brass Works, Inc.
The EPDM glass washer forms part of the sealing arrangement around the gauge glass connection, while the packing assembly provides sealing around the operating stem. These components are part of the manufacturer’s standard Model 905A configuration and should be inspected when servicing an existing fixture.
The short-shank design has published dimensions of approximately 1.25 inches for dimension A, 5.20 inches for dimension B, and 5.02 inches for dimension C. United Brass Works lists an approximate shipping weight of 0.63 lb for the 1/2-inch Model 905A. United Brass Works, Inc.
For installations where a different hand wheel material is desired, United Brass Works also offers the same basic short-shank upper fixture configuration with a plastic hand wheel as Model 905APW. This provides an alternative to the ductile iron hand wheel supplied with the standard Model 905A. United Brass Works, Inc.
When incorporated into a complete water gauge system, the Model 905A functions as the upper fixture and is paired with a compatible lower fixture and gauge glass. For example, United Brass Works uses the 905A together with the Model 946A lower fixture in several of its short-shank water gauge fixture sets, including the Model 34018. United Brass Works, Inc.
The upper and lower fixtures provide isolation points at each end of the gauge glass and allow liquid level within the connected equipment to communicate with the visible glass tube. Proper selection of the gauge glass length, fixture spacing, seals, and associated components is important for correct installation and dependable water-level indication.
United Brass Works assigns CRN OCO7135.2C to the Model 905A. Manufacturer documentation also specifies that the product contains lead and is not intended for potable water systems or water systems intended for human consumption. United Brass Works, Inc.
For maintenance departments, boiler service contractors, OEM applications, or replacement of an existing short-shank upper gauge fixture, the Model 905A provides a compact bronze configuration designed specifically for industrial water-level gauge assemblies.
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