Morrison Bros. 710SS Series 1 in. Stainless Steel Anti-Siphon Solenoid Valves w/ PTFE Seal - Threaded

1-Inch Stainless Steel Anti-Siphon Solenoid Valve for Fuel Systems & Liquid Cooling Infrastructure

The Morrison Bros. 710SS is a normally closed, hung-piston solenoid valve with a 304 stainless steel body and PTFE seals, sized at 1" NPT for mid-range flow applications. It installs on the dispensing side of a fuel or fluid pipeline, remaining closed until an electronic signal (from a dispenser, pump controller, or BMS) commands it open. The 1" size carries a CV of 12 and handles operating pressures up to 105 PSI, making it a practical fit for single-rack or small-cluster coolant distribution unit (CDU) supply and return lines where moderate flow rates and a compact footprint are priorities. Zero pressure differential operation means the valve opens reliably even under low-pressure start-up conditions common in server rack manifolds.

The 304 SS body and PTFE seal combination resists galvanic corrosion and ion contamination in deionized water loops, glycol-based coolants, and dielectric fluids used in direct-to-chip and immersion cooling systems. The integral thermal relief feature protects closed loop segments from pressure spikes caused by thermal expansion under high server loads. The Class H coil operates at 120V AC standard, with the explosion-proof NEMA 3/4X/7/9 enclosure covering hazardous location requirements (relevant for two-phase immersion cooling environments with low-flashpoint fluid volatility).

Key specifications:

• Size: 1" NPT
• Body: 304 stainless steel
• Seals: PTFE
• Piston: Stainless steel
• Orifice: 1"
• CV: 12
• Operating pressure differential: 0–105 PSI
• Max fluid temperature: 356°F
• Min operating temperature: -40°F
• Power consumption: 30 watts
• Coil: Continuous duty Class H, 120V AC standard (multiple voltages available)
• Enclosure: Watertight, explosion-proof — NEMA 3, 4X, 7, 9; Groups C and D
• Max fluid viscosity: 60 centistokes
• Certifications: UL/cULus Listed; Class I Div. 1 Groups C&D; Class II Div. 1 Groups E, F, G; Class III
• Install orientation: Horizontal pipeline, upright vertical position

NOTE: Product 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
• Several optional coil voltages available
• Enclosure is watertight and rated for hazardous locations—NEMA 3, 4X, 7 and 9; groups C and D
• 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: Stainless steel
• Seals: Viton®, PTFE
• 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