61931 H.B. SMITH Steam Controls & Trim – Gauge Glass Set
The H.B. Smith 61931 Steam Controls & Trim – Gauge Glass Set is a complete replacement kit for GB300, 28A/RTS, and 28HE/RTSHE series boilers. This set provides reliable water level and pressure monitoring while ensuring safe and efficient boiler operation.
It also includes compatible components using Conbraco 20-105-00 and a Conbraco 70-801-01 Two-Way Ball Valve, making it a full solution for replacement or maintenance.
🌟 Key Features
✅ Complete steam gauge glass set – includes top and bottom valves, gauge glass, and coated steel guard rods
✅ Fits GB300, 28A/RTS, 28HE/RTSHE series boilers
✅ Bronze body and composite handle wheel for durability and ease of use
✅ Gauge glass: 5/8" diameter x 11 1/2" length (O.D. 5/8" x 12")
✅ Handles 125 psig @ 350°F and 300 psig @ 100°F
✅ Includes standard 1/4” drain valve
✅ ASME compliant
✅ Made in USA
✅ Includes Conbraco 70-801-01 Two-Way Ball Valve – 1/4" FNPT x FNPT, 600 psi CWP, 150 psi steam, bronze construction
⚙️ Technical Specifications
| Specification | Details |
|---|
| Brand |
H.B. Smith |
| Part Number |
61931 |
| Boiler Compatibility |
GB300, 28A/RTS, 28HE/RTSHE series |
| Gauge Glass Size |
5/8" diameter x 11 1/2" length (O.D. 5/8" x 12") |
| Connection Size |
1/2" |
| Material |
Bronze body, composite handle wheel |
| Pressure Rating |
125 psig @ 350°F, 300 psig @ 100°F |
| Drain Valve |
1/4" standard |
| Guard Rods |
Coated steel included |
| Compliance |
ASME design requirements |
| Ball Valve Included |
Conbraco 70-801-01 Two-Way, 1/4" FNPT x FNPT, 600 psi CWP, 150 psi steam |
| Made In |
USA |
⚠️ Common Symptoms (When Replacement is Needed)
-
Cracked or damaged gauge glass
-
Leaks from top/bottom valves
-
Inaccurate water level readings
-
Corroded or damaged guard rods
-
Difficulty operating the valve wheel
-
Reduced boiler safety due to worn ball valve
❓ Frequently Asked Questions (FAQ)
Q1: Which boilers is this gauge glass set compatible with?
➡️ GB300, 28A/RTS, and 28HE/RTSHE series H.B. Smith boilers.
Q2: Does this set include all necessary components?
➡️ Yes, it includes top and bottom valves, gauge glass, guard rods, and a compatible two-way ball valve.
Q3: What are the pressure and temperature ratings?
➡️ Gauge glass: 125 psig @ 350°F, 300 psig @ 100°F. Ball valve: 600 psi CWP, 150 psi steam.
Q4: Is this ASME compliant?
➡️ Yes, the complete set meets all ASME design requirements.
🛒 Shopping Tips
💡 Inspect existing glass and valves for cracks, leaks, or corrosion before ordering.
🔧 Ensure the drain valve and ball valve operate freely.
📦 Keep spare gauge sets and ball valves on hand to prevent boiler downtime.
✅ Match your boiler series (GB300, 28A/RTS, 28HE/RTSHE) before purchase.
