United Brass Works 903 High Pressure Lower Gauge Fixture Overview
The United Brass Works 903 is a 1/2-inch high pressure lower gauge fixture valve with ball check designed for industrial steam boiler water-level monitoring systems. The valve serves as the lower fixture in a compatible gauge glass assembly, providing the lower connection between the boiler or water column and the visual gauge used to monitor boiler water level.
The United Brass Works 903 is rated for 250 WSP at a maximum temperature of 406°F and is intended for water and steam applications. The manufacturer identifies the valve as a rising-stem, offset-design gauge fixture that complies with ASME B31.1 and Section I, PG-60, Appendix A-18 of the ASME Boiler Code. United Brass Works, Inc.
An important feature of the Model 903 is its internal 302 stainless steel ball check. In a properly configured boiler gauge system, the ball-check arrangement helps restrict the release of steam or water if the gauge glass is damaged or broken. United Brass Works uses ball checks in its high-pressure gauge fixture assemblies as a protective feature for boiler water-level indication systems. United Brass Works, Inc.
The valve uses a CDA 836 bronze body combined with durable metallic internal components suitable for industrial gauge service. Manufacturer specifications identify CDA 360 for the union tail piece and bonnet, CDA 922 for the union nut, CDA 693 for the stem, and 300 Series stainless steel for the rod bracket. The internal ball is manufactured from 302 stainless steel. United Brass Works, Inc.
The Model 903 also incorporates sealing and operating components selected for the gauge fixture assembly, including packing, an FKM seal washer, an EP 70 durometer O-ring, plated steel washer, brass glass nut, zinc hand wheel, and aluminum marker disc. These components form part of the complete lower fixture configuration specified by United Brass Works. United Brass Works, Inc.
As the lower fixture, the United Brass Works 903 is designed to work with the Model 902 upper fixture. United Brass Works combines these two valves in its Model 34041 High Pressure Boiler Gauge Fixture Set, which also includes the components required to support and protect the gauge glass installation. United Brass Works, Inc.
The lower fixture is an important part of the water-level indication system because it provides the bottom connection to the gauge glass assembly. Together, the upper and lower fixtures allow the water level inside the boiler or water column to communicate with the gauge glass, providing operators with a direct visual indication of system water level.
The rising stem design provides a visible indication of valve position during operation, while the offset configuration supports proper arrangement of the gauge fixture assembly. Selection and installation should always consider boiler pressure, operating temperature, connection dimensions, gauge glass configuration, and applicable boiler and piping requirements.
The Model 903 may be used as an individual replacement fixture when servicing an existing compatible gauge assembly, or as one component of a complete high-pressure boiler gauge fixture installation. United Brass Works currently lists the Model 903 separately as well as within its boiler gauge fixture product family. United Brass Works, Inc.
Manufacturer specifications list an approximate unit weight of 2.8 lb for the Model 903. The product carries CRN OCO7135.2C and, according to United Brass Works, contains lead and is not intended for use in potable water systems. United Brass Works, Inc.
For boiler maintenance, gauge glass system repairs, and replacement of an individual lower fixture, the United Brass Works 903 provides a high-pressure configuration specifically designed for industrial boiler water-level monitoring applications.
Explore more United Brass Works products available from JJC Global Group.