McDonnell & Miller 181425

250-¾-45, Relief Valve ¾” NPT, 45 psi (3.2 kg/cm2)

For tanks and hydronic heating systems

Specifications

• Protects against over pressure
• Minimizes hammering with flash steam
• Low differential pressure - 3 psi (.21 kg/cm2) between opening and closing
• Meets ASME Pressure Vessel and Boiler Code, Section IV
• Sizes and material:

¾” - 1” NPT - bronze body and seat

2” NPT - cast iron body, brass seat * EPDM rubber diaphragm and seat disc * Maximum temperature 250 Deg. F (121 Deg. C) * Maximum operating pressure range 30 - 125 psig (2.1 - 8.8 kg/cm2)