Series Overview:
Series 740
- Construction: Brass nozzle, stainless steel ring, disc, and springs; brass/bronze body and bonnet
- Pressure Rating: 350 psig (24.1 barg) for air/gas and liquid, 250 psig (17.2 barg) for steam
- Temperature Range: -320°F (-196°C) to 406°F (208°C)
Series 741
- Construction: Stainless steel nozzle, ring, disc, and springs; brass/bronze body and bonnet
- Pressure Rating: 1500 psig (103.4 barg) for air/gas and liquid, 300 psig (20.7 barg) for steam
- Temperature Range: -320°F (-196°C) to 425°F (218°C)
Series 742
- Construction: Stainless steel nozzle, ring, disc, all internals, and springs; carbon steel body and bonnet
- Pressure Rating: 1500 psig (103.4 barg) for air/gas and liquid, 300 psig (20.7 barg) for steam
- Temperature Range: -20°F (-29°C) to 800°F (427°C)
Series 743
- Construction: Stainless steel nozzle, ring, disc, all internals, and springs; stainless steel body and bonnet
- Pressure Rating: 1500 psig (103.4 barg) for air/gas and liquid, 300 psig (20.7 barg) for steam
- Temperature Range: -320°F (-196°C) to 800°F (427°C)
Series 744–748
- Materials: Specialty metals tailored for specific applications
- Specifications: Contact Aquatrol for detailed dimensions and cut sheets
Applications:
Ideal for pressure vessels, pumps, hydraulics, tanks, steam systems, chemical processing, cryogenic applications, air/gas compressors, separators, bypass systems, and overpressure protection. Designed for a wide range of industrial applications requiring dependable safety relief solutions.
