ASME SECTION VIII FOR AIR-GAS-STEAM OR LIQUID SERVICE
Series 740 safety and relief valve is designed for accuracy and reliability. Engineered for heavy-duty industrial usage. Multiple purpose pressure relief valve for all services: Liquid, Steam and Air/Gas. ASME and National Board Certified for Section VIII service as well as CE and CRN certifications. Pressures are to 1500 PSI. Available with a full array of metal seating options.
Series 740
Brass nozzle, stainless steel ring, disc and springs. Brass /
bronze body, bonnet.
350 psig (24.1 barg) for air/gas and liquid, 250 psig (17.2 barg)
for steam.
Temperatures -320°F (-196°C) to 406°F (208°C)
Series 741
Stainless steel nozzle, ring, disc and springs. Brass / bronze
body, bonnet.
1500 psig (103.4 barg) for air/gas and liquid, 300 psig (20.7
barg) for steam.
Temperatures -320°F (-196°C) to 425°F (218°C)
Series 742
Stainless steel nozzle, ring, disc, all internals and springs.
Carbon steel body, bonnet.
1500 psig (103.4 barg) for air/gas and liquid, 300 psig (20.7
barg) for steam.
Temperatures -20°F (-29°C) to 800°F (427°C)
Series 743
Stainless steel nozzle, ring, disc, all internals and springs.
Stainless steel body, bonnet.
1500 psig (103.4 barg) for air/gas and liquid, 300 psig (20.7
barg) for steam.
Temperatures -320°F (-196°C) to 800°F (427°C)
Series 744 thru 748
Specialty metals with distinct options, contact Aquatrol for specs, dimensions and cut sheets.
Usages:
Pressure Vessels, Pumps, Hydraulics, Tanks, Steam Systems, Chemical, Cryogenic, Air and Gas Compressors, Separators, by-pass and over pressure protection. Choose for most industrial applications requiring a safety relief valve.
Features:
- Full nozzle - Top guided design
- Short, precise blow-down
- Wide choice of inlet/outlet sizes
- Dual-lapped precision seating
- 100% Back pressure tight
- Drain hole with threaded plug
- Cryogenic Compatible
Options:
- Tri-Clamp x Tri-Clamp Connection
- O-ring seating options (see charts)
- Packed lift lever or Closed cap
- BSPT and BSPP Piping
- Tri-Clamp Inlets
- Full array of metal options
- API 527 Seating
- Lap Joints Flanges
- Lead Free (D,E, and F orifice only)
- O2 Cleaning
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The Aquatrol Series 740 Safety Relief Valve is designed to provide reliable overpressure protection across a wide range of industrial applications. Built with durability and precision in mind, this series offers dependable performance where safety cannot be compromised. Engineered from high-quality materials and tested to meet strict industry standards, the Series 740 is trusted by operators who require long-lasting and accurate relief solutions.
Reliable Performance for Critical Applications
Every Series 740 safety relief valve is crafted for consistent performance under demanding conditions. Whether you are managing steam, air, gas, or liquid systems, these valves are designed to open precisely when pressure exceeds set limits, preventing costly downtime and protecting both equipment and personnel.
The Series 740 is available in multiple materials and configurations to meet the diverse requirements of industrial systems. Its rugged construction, compact design, and precision machining ensure stability and reliability, even under repeated cycling.
Versatility Across Industries
Aquatrol’s 740 Series is used in a wide range of industries, including:
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Chemical processing and refining
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Energy and power generation
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Oil and gas
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Water treatment and distribution
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Manufacturing and industrial plants
Whether it’s a flanged safety valve application for high-pressure pipelines or a specialized cryogenic safety valve requirement for low-temperature environments, the Series 740 provides proven performance.
Flanged Safety Valve Options
When systems demand secure, high-capacity connections, the Series 740 flanged safety valve configuration provides a reliable solution. The flanged design allows for easier installation, secure mounting, and improved sealing, making it an excellent choice for large-scale industrial applications.
Cryogenic Safety Valve Applications
For extremely low-temperature processes, the Series 740 can be configured as a cryogenic safety valve. These valves are engineered to maintain integrity and responsiveness even in cryogenic service, ensuring safe operation in environments such as liquefied gas storage, cryogenic transfer lines, and cold-temperature industrial systems.
Built to Aquatrol’s High Standards
The Series 740 is part of Aquatrol’s long tradition of American-made quality. Every valve is carefully tested and manufactured to ensure it meets exacting specifications. With a focus on safety, dependability, and performance, Aquatrol valves are the trusted choice for professionals who cannot afford failure.
Explore More Safety Valve Solutions
In addition to the Series 740, Aquatrol offers a wide range of relief valves designed to meet specific system requirements. Contact us to learn more about our cryogenic safety valves to explore options tailored for low-temperature operations.
Frequently Asked Questions
What applications are the Series 740 Safety Relief Valves designed for?
The Series 740 safety relief valve is built for use in steam, air, gas, and liquid systems. It provides dependable overpressure protection in industries such as chemical processing, oil and gas, manufacturing, and power generation.
Do you offer the Series 740 as a flanged safety valve?
Yes. The Series 740 is available in a flanged safety valve configuration, which provides secure mounting and high-capacity performance for industrial piping systems. Flanged models are ideal for high-pressure and large-scale applications.
Can the Series 740 be used as a cryogenic safety valve?
Absolutely. The Series 740 can be configured as a cryogenic safety valve, making it suitable for extremely low-temperature applications such as liquefied gas storage, transfer lines, and cryogenic industrial processes.
What materials are available for the Series 740 Safety Relief Valves?
The Series 740 is offered in a range of durable materials to match specific system needs, including brass, stainless steel, and specialty coatings. This ensures corrosion resistance and long service life across different operating conditions.
How do Aquatrol Series 740 Safety Relief Valves ensure reliability?
Each valve is precision-engineered and thoroughly tested to meet strict safety standards. With rugged construction and consistent performance, the Series 740 provides reliable protection against overpressure events in demanding industrial environments.