Series 140 Safety Relief Valves
Compact high-pressure for standard applications
Specifications
- Body Material: B16 Brass
- Ball Material: 440 SS
- Max Pressure: 350 psig
- Temperature Range: -20°F to 406°F
- Media: Air/Inert Gas ONLY
- Outlet: Vents to Atmosphere
- Certifications: ASME VIII
Manufactured by Aquatrol • Authorized Distributor • American-Made
Series 141 Safety Relief Valves
Stainless body for corrosion resistance
Specifications
- Body Material: SA479-316 SS
- Bonnet Material: B16 Brass
- Ball Material: 440 SS
- Max Pressure: 450 psig
- Temperature Range: -20°F to 406°F
- Media: Air/Inert Gas ONLY
- Certifications: ASME VIII
Manufactured by Aquatrol • Authorized Distributor • American-Made
Series 143 Safety Relief Valves
Full stainless for high temperature and corrosion
Specifications
- Body Material: SA479-316 SS
- Bonnet Material: SA479-316 SS
- Ball Material: 440 SS
- Max Pressure: 450 psig
- Temperature Range: -20°F to 800°F
- Media: Air/Inert Gas ONLY
- Certifications: ASME VIII
Manufactured by Aquatrol • Authorized Distributor • American-Made
Overview
The 140 Series delivers compact, high-pressure safety relief for air and inert gas systems. With a unique ball-seal design and venting to atmosphere, these valves are ideal for small pneumatic systems, instrumentation, and high-pressure air applications.
Available in brass (140), stainless body with brass bonnet (141), and all-stainless (143) for temperature and corrosion requirements.
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Frequently Asked Questions
Can 140 Series be used for steam or liquid?
No, the 140 Series is ASME certified for air and inert gas only. The catalog specifically states 'air and inert gas services' with no mention of steam or liquid capability.
What's the difference between orifice A and B?
Orifice A (slope 0.924) is available in 1/4", 3/8", and 1/2" inlet sizes. Orifice B (slope 1.487) provides higher capacity and is available in 3/8", 1/2", and 3/4" inlet sizes.