Watts Figure 31 - Manual

ASME Section 1, Steam Boiler Applications
ES-FIG31
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Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with-
out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
Series Figure 31
Bronze and Cast Iron Safety
Relief Valves
For Steam Boilers
Sizes: Bronze - 1 ⁄
2
" – 2 1 ⁄
2
" (15 – 65mm)
Cast iron - 1 1 ⁄
2
" – 6" (40 – 150mm)
Figure 31 is a safety relief valve which provides over pressure
protection of steam boilers operating up to 250psi (17.2 bar)
and 406°F (208°C) saturated steam. Figure 31 safety relief
valves meet ASME Section 1 code.
Features
• 2 piece body design
• Enclosed springs
• 2-ring control
• Provides precise pop action and seat tightness
• Single unit cap and lifting lever
Approvals
Rated in accordance with ASME Section I
Pressure – Temperature
Maximum Working Pressure: 250psi (17.2 bar)
Maximum Working Temperature: 406°F (208°C)
Fig. 31
Bronze safety valves
Fig. 31
Flanged cast iron
safety valves