MORRISON BROS. Morrison Bros. 710 Series 1 1/2 in. Anti-Siphon Solenoid Valves 710---0150 1V

Normally Closed Anti-Siphon Valve The Morrison Bros. 710 Series is a normally closed, hung piston solenoid valve designed to prevent accidental siphoning of product from a tank when a downstream pipe fracture or leak occurs below the liquid level. Installed on the dispensing side of a fuel system pipeline, the valve remains closed until it receives an electronic signal (such as a dispenser or pump switching on) at which point it opens to allow flow. Zero pressure differential operation means the valve actuates reliably even in low-pressure gravity-fed systems where pressure-dependent designs would fail to open. In data center liquid cooling environments, including direct-to-chip and immersion cooling systems, the 710 Series serves as a critical fail-safe on coolant distribution units and manifolds: if a line breaks at an elevation below the reservoir, the valve automatically closes to prevent the entire coolant supply from draining onto active infrastructure. The Class H continuous-duty coil supports extended open cycles without thermal degradation, making it suitable for the around-the-clock demands of high-density GPU and CPU cooling loops. The brass-body 710 is available in ¾" through 3" NPT and uses FKM seals rated to 302°F. For compatibility with treated water, glycol coolants, or corrosive process fluids, the 710SS variant offers a 304 stainless steel body, stainless piston, and PTFE seals rated to 356°F. The solenoid is housed in an integral watertight, explosion-proof enclosure rated NEMA 3, 4X, 7, and 9 (Groups C and D) and carries UL and cULus listings for Class I Division 1 and Class II Division 1 hazardous locations. The standard coil operates at 120V AC and the 710MO adds a manual override for operation during a power outage. Key specifications: Maximum fluid temperature: 302°F Maximum fluid viscosity: 60 centistokes Integral thermal relief relieves expansion pressure opposite to flow direction Enclosure: NEMA 3, 4X, 7, 9; explosion-proof, watertight UL Certified: Class I Division 1 Groups C & D; Class II Division 1 Groups E, F & G; Class III; cULus Listed 100 mesh inlet strainer recommended NOTE: This valve can only be pumped in one direction, the direction of the flow arrow. Not designed for use as an overfill prevention or process control valve. Features Normally closed, hung piston design Install in a horizontal pipeline in the upright vertical position Zero pressure differential Integral thermal relief allows the valve to relieve expansion pressure in the opposite direction of flow Continuous duty Class H standard coil operates at 120 volts Enclosure is watertight and rated for hazardous locations—NEMA 3, 4X, 7 and 9; groups C and D Several optional coil voltages available 710MO has manual override feature. Available in sizes ranging from ¾″ to 2″ for operation during a power outage Recommended for use with liquids having a maximum viscosity of 60 centistokes A strainer with a 100 mesh screen is recommended at the valve inlet Construction Details Body: Cast bronze Seals: Viton®, Teflon® Solenoid housed in an integral, watertight, explosion-proof shell Certifications CSA approved for hazardous locations Class I, Groups C and D Class II, Groups E, F and G Class III T3C Downloads Installation Instructions (PDF Download)